The article presents the principles on which the upgrading of the ground and surface water treatment plants, respectively the implementation of new technologies are based. The outcome obtained in Timisoara consequently to applying the aforesaid principles and the strategies for the improvement in drinking water quality are also provided....
Autori: Ilie Vlaicu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25151

Contain all the articles from this issueICEEM /01 PLENARY CONFERENCETen years of Environmental Engineering and Management education and research at the Technical University of IasiMatei Macoveanu, Carmen Teodosiu ICEEM/01  - Environmental Engineering SectionRemoval of nitrogen oxides from Diesel exhaust: Laboratory studies for development of an SCR-catalyst-system using solid urea as reducing agentWerner Weisweiler High temperature desulphurization of hydrogen sulphide containing ...
Autori:
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25167

Contain all the articles from this issue:ICEEM/01 -- Environmental Management Section Corporate environmental competence: A concept for characterising and assessing the environmental practice in companies and product chainsMichael S?¸gaard J?¸rgensen, Marianne Forman Life cycle assessment of some alternatives for the supply of thermal energy in the municipality of Iasi (Romania).Nicolae Peiu Management options for the industrial and municipal wastes in the city of Iasi Carmen Teod...
Autori:
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25169

Contain all the articles from this issueEditorialEstablishing effluent discharge limits - have we got it right?Yusuf Chisti Full papersSurvey on the treatment of gaseous streams containing volatile organic compoundsOana Penciu, Maria GavrilescuEU environmental policy for industrial pollution control. IPPC DirectiveElena Bobu Environmental monitoring Antonius A.F. KettrupProcess The sonochemical degradationof cyanide ions using atmospheric oxygen as oxidizing agentIoan Iordache, Mircea Teodor Nec...
Autori:
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25171

Contain all the articles from this issueCatalysis for heterogeneous photocatalysis. Part II. Methods for synthesisAnca Florentina Caliman, Ion BalasanianpH influence on sonochemical degradation of cyanides with H2O2 and O2Ioan Iordache, Mircea Teodor Nechita, Nicolae Aelenei, Gabriela Apostolescu, Ioan Rosca Studies of various wastewater nitrification bioreactor types based on modelling and simulationDiana Lupasteanu, Florina Ungureanu, Maria Gavrilescu Wastewater from winemaking industry: monit...
Autori:
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25175

Contain all the articles from this issueICEEM /02 PLENARY SESSION:"Environmental Engineering and Management in the Context of Sustainable Development"Design for sustainability (D4S): towards advanced product conceptsHan Brezet, Sacha SilvesterICEEM/02 - ENVIRONMENTAL ENGINEERING SECTION"Water and Wastewater Treatment Technologies"Complex approach to the problem of persistent organic pollutants degradation in water environmentVictor Covaliov, Olga Covaliova, Angela Cincilei, Gilles Mailhot, Pasca...
Autori:
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25176

Contain all the articles from this issueCatalysis for heterogeneous photocatalysis. Part II. Methods for synthesisAnca Florentina Caliman, Ion BalasanianpH influence on sonochemical degradation of cyanides with H2O2 and O2Ioan Iordache, Mircea Teodor Nechita, Nicolae Aelenei,Gabriela Apostolescu, Ioan RoscaStudies of various wastewater nitrification bioreactor types based on modelling and simulationDiana Lupasteanu, Florina Ungureanu, Maria Gavrilescu Wastewater from winemaking industry: monitor...
Autori:
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25179

Contain all the articles from this issueICEEM/02 - ENVIRONMENTAL ENGINEERING SECTION"Treatment Technologies for Gaseous Fluxes"Surface chemistry studies on molybdena–alumina catalystTatiana Yuzhakova, ?kos R?Šdey, Endre Domokos, J??zsef Kov??cs, Monica Caldararu, Cristian Hornoiu, Mariana Carata, G.Postole, Cornel Munteanu, Larisa Strukova, Jozse FazakasHebicidal behaviour of a new N,N'- biquaternary salt of 4,4'- bipyridineServilia Oancea, Marinela Irimia, Gabriela Carja, Anton Airinei, Nicu...
Autori:
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25189

Iinclude urmatoarele articole:â€? Phenol degradation in water through a heterogeneous photo-fenton processâ€? Study concerning the influence of oxidizing agents on heterogeneous photocatalytic degradation of persistent organic pollutantsâ€? Nonmarket valuation of acequias: Stakeholder analysisâ€? Metals concentration in soils adjacent to waste depositsâ€? Polyelectrolyte - surfactant complexesâ€? Modelling of sorption equilibrium of Cr(vi) on isomorphic substituted Mg/Zn-Al - type hydrotalcitesâ...
Autori:
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25206

AbstractThe present paper proposes the design of a modules system of measurement and control of data distributed transmission, implemental on automatic irrigation systems of central pivot or linear movement type. By this it is intended to obtain a complex irrigation system that allows optimization of nutrient application....
Autori: Codrin Donciu, Marinel Temneanu,
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25219

AbstractConsidering the importance of transfer phenomena in chemical engineering and environmental protection, in particular heat transfer modelling, numerical methods are applied to investigate the transient heat transfer inside an elliptic cylinder. The temperature of the surrounding medium was considered constant and equal to the temperature on the surface of the cylinder. The heat balance equation was solved numerically in elliptic coordinate system. The computations were focused on the infl...
Autori: Gheorghe Juncu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25269

AbstractThe cost sensitivity analysis of a chemical process was carried out through a sequence of three stages, using three different software applications. In the first stage an alkylation process was optimized with GAMSÂŽ software, the objective function being the profit. This optimization was repeated for the values of five different costs in the frame of a factorial experiment. In the next stage, the objective function-costs dependence was quantified with an artificial neural network, obtain...
Autori: Alexandru Woinaroschy
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25273

AbstractThe use of composite fuels using pitcoal and sawdust represents a high perspective. The paper deals with the experimental results focusing on the combustion efficiency of composite fuel briquettes and on the polluting emissions level. A special care is given to the determination of boiler efficiency and to the establishment of exploiting economic conditions, like the supply, cleaning etc. The research of the combustion of pitcoal-wood biomass briquettes is conducted on a 55 kW boiler.A n...
Autori: Gabriel Negreanu, Gheorghe Lăzăroiu, Ion Oprea, Ionel Pisa, Lucian Mihăescu, Radu Indries, Tudor Prisecaru
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25301

- Artificial intelligence applications in the atmospheric environment: status and future trends- Kernel methods and neural networks for water resources management- Environmental decision support systems based on models and model-based reasoning- Towards an intelligent tutoring system for environmental decision makers- SBC-MEDIU: A multi-expert system for environmental diagnosis- Fast and accurate residential fire detection using wireless sensor networks- Validation of a knowledge-based risk mode...
Autori: http://www.ecozone.ro/reviste.php?RID=25377

AbstractThe present work carries out a parallel analysis between the performances and, on the other hand, of the restrictions of two different model systems designed to assess the nearshore circulation. These are SHORECIRC, which is a widely known general prediction system for nearshore circulation and ISSM (the Interface for SWAN and SURF Models). SHORECIRC is a quasi-3D model that combines a numerical solution for the depth-integrated 2D horizontal momentum balance equations with an analytical...
Autori: Eugen Rusu, Silviu Macuţă
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25345

AbstractIn the present article, some models conceptually and mathematically applicable to the LNAPL transitory transport process through ground water were discussed. Subsequently, by using a personal computer program of pre-processing basis data combined with MOVER 2.0, the levigation process of oily dross/scale stored in the waste dump, which produces steel rolled tubes, was numerically simulated, in adequate scenarios. The results of the simulations will be useful at the evaluation of the impa...
Autori: Elena Doinita Carlig, Matei Macoveanu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25361

Include urmatoarele articole:� CsHSO4/mesoporous silica composites - new electrolytes for solid acid fuel cells� Trend in exhaust emissions from in-use gasoline vehicles� Analysis of distribution of oxygen transfer rate in stirred bioreactors for bacterial broths� Electrochemical characteristics of Ti6Al7Nb alloy in Ringer's solution� Pulsed high voltage discharge technology as a new method for killing Hepatitis C virus (HCV) cells� Hydrodynamic modelling of pollution with LNAPL gene...
Autori:
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25367

Include urmatoarele articole:� Environmental Engineering and Management Journal, Vol. 8 Nr. 2� Bioengineering aspects of tissues culture bioreactors for medicine and environmental applications� Removal of bis (1-chloro-2-propyl) ether from wastewater using sonodegradation and biodegradation� A novel plasma reactor for toluene decomposition in contaminated air flow� Study of the copper (II) removal from aqueous solutions by chelating resin Purolite S930 � Analysis of some metal levels...
Autori:
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25371

â€? Bioremediation of contaminated air using a bioscrubberâ€? Quality risk evaluation of the groundwater resources on the moldavian areaâ€? Electrochemical characterization of some dental materials in accelerated environmental testingâ€? Preliminary study of simple and Fenton oxidation with hydrogen peroxide applied on final effluents from a zootechnical farmâ€? The environmental impact assessment caused by the dykes failureâ€? Revaluation of beer industry byproducts – medical implicationsâ€? ...
Autori: http://www.ecozone.ro/reviste.php?RID=25372

� Physiological changes in seedling germination and growth plant under chemical stress conditions� Studies on sorption and transport processes of cadmium in soils� Assessment of the anthropogenic impact on water systems by fluorescence spectroscopy� Research on the effects of soil improvement by fertilization on the quality of winter wheat� Halotherapy: From ethnoscience to scientific explanations� Study regarding the sorption of erythrosine from aqueous solution onto soil� Hydroxy...
Autori:
ISSN: 1582 - 9596
http://www.ecozone.ro/reviste.php?RID=25375

AbstractThe paper proposes a simple and less expensive gas chromatographic method for analyzing acrylamide in food and reveals comparative results regarding the acrylamide content in commercial and home toasted bread. Validation of the method has been achieved by establishing parameters linearity, limit of detection (LOD = 0.1 mg/L), limit of quantization (LOQ = 0.5 mg/L), precision, stability. Run-to-run precision was determined by carrying out five replicate determinations for three acrylamide...
Autori: Anca Irina Burlacu, Rodica Cuciureanu, Patricia Fitterman, Michel Larroque
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25385

Abstract The efficiency of Cd (II) removal from aqueous solutions was investigated using Sphagnum moss peat as sorbent. A 23 orthogonal central composite design was successfully employed for experimental design and analysis of results. The combined effect of the initial solution pH, peat dosage and initial Cd (II) concentration was studied and optimized using Response Surface Methodology (RSM). The optimum values of these variables were found to be pH = 4.72, 14.7 g peat /L and 13.64 mg Cd /L, ...
Autori: Catalin Balan, Corneliu Cojocaru, Petru Bulai, Doina Bilba, Matei Macoveanu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25399

Abstract Taking into account the statistical data gathered in two previously published papers concerning the pollution sources in the production sector, namely Finishing section, various solutions are proposed for wastewater treatment. Bearing in mind the results obtained through the sampling method on different types of water in the urban sanitary sewer system, the conclusion was that the most convenient alternative, besides the source control is the treatment in wastewater treatment plants...
Autori: Irina-Isabella Savin, Romen Butnaru
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25408

Abstract The paper presents the capacity of biodegradation of selected microorganism, cultivated on liquid culture media to which diesel was added in different amounts, to determine petroleum products and process efficiency. The optimum necessary conditions for development of microbial strains (pH, temperature, the quantities petroleum product / inoculum) have been established with the help of an experimental optimization program, SIMPLEX....
Autori: Dana-Camelia Cocut, Cornel Cojocaru, Mariana Diaconu, Matei Macoveanu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25414

Abstract The current paper describes the concept and the mathematical models axed upon flow transport and transport of pollutants in the aquifer inside a metallurgical waste hall. Then, using a complex of basic data related to a representative case study - several information being achieved by systematic measurements, for long period, throughout ten drillings - and the pack of FEFLOW 5.1 programmes, the dispersion of an uppermost pollutant (the anion SO4) has been numerically simulated, for t...
Autori: Elena Doinita Carlig, Esmeralda Chiorescu, Matei Macoveanu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25416

Abstract Up to the present days, the bioprocesses were designed and operated with the aim at achieving some economic, environmental, and social criteria. Sustainability based optimization has to be the next step towards the improvement of the economical, environmental and social parameters of bioprocesses. In this work, sustainability will be treated as an optimization task where the objective function(s) is/are either a performance index or a set of performance indices, subject to economic, ...
Autori: Alexandru Woinaroschy, Dana Irina Ofiteru, Vasile Lavric
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25418

Abstract This paper aims to analyze theoretically events in the economy - ecology - environment (natural resources) mega - system. This analysis includes methodologies making use of the first and second thermodynamic principles (for approaching the waste role in technological processes contour toward environment and the entropy variation importance in the main environmental segments), the application of systems theory and theories relating to emergy. The obtained results allow us to propose, ba...
Autori: Avram Nicolae, Cristian Predescu, Maria Nicolae, Mirela Gabriela Sohaciu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25428

Abstract The photocatalytic degradation of sulfamethazine, a sulfonamide drug, has been investigated experimentally, in aqueous heterogeneous solutions containing n-type oxide semiconductors as photocatalysts, and by simulation, using neural network modeling. Through direct neural network modeling, the evolution of the photocatalytic oxidation process is evaluated as function of illumination time and type of catalyst. Inverse neural network modeling is a particular optimization that gives inf...
Autori: Ciprian George Piuleac, Ioannis Poulios, Silvia Curteanu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25430

Abstract Increasing the solar energy conversion into electrical or thermal energy represents an European and national priority, because it offers clean alternatives to the use of fossil fuels, in no pollutant systems, based on photovoltaic modules and solar collectors. The global solar radiation is the most important factor affecting the amount of energy produced by a PV module. In direct connection with the change in the solar energy conversion, the TR - Loss Coefficient (Tr??bungsfaktor) is...
Autori: , Dorin Valentin Diaconescu, Maria Valentina Dinicu (Popa), Bogdan Gabriel Burduhos
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25465

Abstract Changing fuel consumption to a more ecological environmentally alternative is replacing fossil fuels with fuels generated from renewable resources. Ethanol, a renewable fuel, can be produced mainly from crops, lignocellulosic biomass and different other environmental wastes. Although ethanol has been produced mainly from crops, there is a great interest in using cheaper lignocellulosic materials as a feedstock for ethanol production. The aim of this paper is study of dilute acid hyd...
Autori: Ionel Balcu, Adina-Elena Segneanu, Marius Constantin Mirica, Mirela Ioana Iorga, Corina Macarie, Raluca Martagiu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25481

Abstract The cleanup of environmental pollution involves a variety of techniques, ranging from simple biological processes to advanced engineering technologies. Cleanup activities may also address a wide range of contaminants. Technologies to remediate contaminated soil fall into two principal clean-up approaches: in-situ (which is always done onsite), or ex-situ (which can be done on- or off-site). In-situ treatment deals with contamination without removing material from the ground, while ex...
Autori: Maria Gavrilescu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25501

Abstract White mustard (Sinapis white) is an annual plant of the Cruciferae family originating from the Mediterranean region and is cultivated in Europe and Asia, mainly for its seeds, but also for animal feed or crop rotation. White mustard seed is also an important source of vegetable oil that can be used as fuel. The chemical composition of mustard seed (Sinapis alba) includes glucosinolate (sinalbozida, sinapina free), essential oils, fatty oils (glycerides of oleic acid, linoleic, linole...
Autori: Camelia Ciubota-Rosie, Rodica Diaconescu, Irina Volf, Matei Macoveanu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25561

Abstract The efficient understanding and application of mathematical models in the study of environmental phenomena keep up with the latest results in the mathematical domain which could provide solutions for controlling, analyzing, predicting and study of risk phenomena. This paper presents a browsing through some mathematical categories of interpreting statistical data, examples and their analysis in connection with the degree of polluting the water down the Danube River with the help of qu...
Autori: Valerian Antohe, Constantin Stanciu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25562

Abstract The practical capacity of an ion exchange or chelating resin depends on various process variables, such as initial solution pH, initial metal ion concentration, metal/resin ratio, contact time and temperature. This work presents the optimization of process variables to maximize the copper loading capacity of chelating resin Purolite S930. To study the combined effect of the initial solution pH, initial Cu (II) concentration and resin dosage were used a 23 orthogonal central composi...
Autori: Petru Bulai, Catalin Balan, Corneliu Cojocaru, Matei Macoveanu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25563

Abstract Some samples consisting in silica functionalized in different degrees with dihydroxy-azomethine groups have been tested as sorbents for copper (II) ions from aqueous solutions in different conditions. An indirect monitoring procedure for the complexing process was approached: UV-VIS absorption intensity ? time variation for the metal-containing solution in which complexing silica was soaked. In order to find the conditions in which the maximum efficiency in the metal absorption can b...
Autori: Ciprian-George Piuleac, Maria Cazacu, Silvia Curteanu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25608

Abstract Characterization of soil permeability is of great importance for several geotechnical analyses. In common practice, because of the difficulty in sampling of granular material, constant head permeability tests are usually employed on specimens having similar relative densities to those in the field. An alternative approach to permeability tests for granular soils is the prediction of permeability levels by means of empirical equations depending on several particle size distribution an...
Autori: Alper Sezer, Burak A. Goktepe, Selim Altun
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25609

Abstract This paper offers a hybrid approach, for the effective estimation of the maximum water supply and the special water flow in the watersheds of Thasos Island. This modeling effort was carried out by employing both artificial neural networks (ANNs) and kernel algorithms. Moreover support vector machines (SVMs) were used for the optimization of the ANNs. Support vector machines were applied to determine the loss of the developed ANN and to enhance its ability to generalize. As a matter o...
Autori: Lazaros S. Iliadis, Stavros Tachos, Stefanos I. Spartalis
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25615

Abstract Mathematical modeling of the ultrafiltration (UF) process is motivated by the complexity of retention phenomena that occur during the UF in conjunction with the complexity of wastewater matrices submitted to ultrafiltration, as well as by the need to predict the process behavior in extreme conditions, such as high pollution loads for UF-membrane cleaning cycles optimization or for automated control of the process. Thus, series of laboratory-scale ultrafiltration experiments were perf...
Autori: , George Barjoveanu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25630

? AN ASSESSMENT OF OPERATIONAL PARAMETERS FOR THE REMOVAL OF CHLOROPHENOLS FROM WASTEWATER ? ENVIRONMENTAL SCIENCES: A PSYCHOLOGICAL-BEHAVIORAL MODEL FOR RESEARCHERS ? ECOLOGICAL AGRICULTURE: DYNAMICS OF THE BIOLOGICAL ACTIVITIES IN SOILS CULTIVATED WITH MAIZE UNDER THE INFLUENCE OF ORGANIC FERTILIZATION ? SOLAR-ASSISTED JOULE-BRAYTON ENGINES USED TO REDUCE CARBON DIOXIDE EMISSIONS ? STUDY OF THE ENVIRONMENTAL EFFECTS OF HEATING SYSTEMS ? MIXED JET-VORTEX METHOD FOR ...
Autori:
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25662

? COMPARATIVE CONSIDERATIONS ON THE STRUCTURE OF SOME MOLYBDENUM/NIOBIUM DOUBLE PEROVSKITES OXIDES ? THE INFLUENCE OF THE STORAGE TIME ON THE STABILITY OF BUTTER ? CaCO3 CONTROLLABLE SYNTHESIS BY DOUBLE EXCHANGE METHOD USING CaCl2 RESIDUAL SOLUTIONS ? OPTIMIZATION OF COAGULATION-FLOCCULATION IN THE TREATMENT OF CANAL WATER ? ANODIC DETERMINATION OF PENTACHLOROPHENOL FROM WATER USING CARBON NANOFIBER-BASED COMPOSITE ELECTRODE ? STUDY OF PRECIPITATES GROWTH IN COAGULATION ...
Autori:
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25663

? COMPACT MICROPULSE BACKSCATTER LIDAR: AIRBORNE AND GROUND-BASED APPLICATIONS ? STUDIES OF THE IMPACT OF AEROSOL OPTICAL PROPERTIES ON CLIMATE CHANGE PROCESSES ? A STUDY OF THE AEROSOL OPTICAL PROPERTIES AT TWO AERONET STATIONS FROM ROMANIA ? COMPLEMENTARY ATMOSPHERIC URBAN POLLUTION STUDIES IN THE NORTH-EAST REGION OF ROMANIA, IASI COUNTY ? ?NGSTR?M TURBIDITY IN THE LOWER LAYERS OF THE TROPOSPHERE ? LIDAR MONITORING OF ANTHROPOGENIC POLLUTION AND NATURAL PHENOMENA ...
Autori:
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25665

? HYDROGEL MICROSPHERES BASED ON ENVIRONMENTALLY FRIENDLY POLYMERS WITH POTENTIAL BIOMEDICAL APPLICATIONS ? STUDY ON THE MIXING EFFICIENCY IN A BASKET BIOREACTOR WITH IMMOBILIZED YEASTS CELLS ? MANAGEMENT OF WASTE FROM ELECTRICAL AND ELECTRONIC EQUIPMENT IN CYPRUS ? A CASE STUDY ? SEPARATION AND CHARACTERIZATION OF ANTHOCYANINS BY ANALYTICAL AND ELECTROCHEMICAL METHODS ? AN INTEGRATED DECISION AID FOR IDENTIFYING AND PRIORITIZING STRATEGIES IN FOREST MANAGEMENT ? INFLUEN...
Autori:
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25668

? ADSORPTION OF DYE FROM AQUEOUS SOLUTION USING SILVER WOOD SAWDUST CARBON ? TIME SERIES ANALYSIS OF THE HEAVY METALS LOADED WASTEWATERS RESULTED FROM CHROMIUM ELECTROPLATING PROCESS ? WATER QUALITY CHARACTERIZATION OF THE PRUT RIVER ? ETHICAL AND SUSTAINABLE EDUCATION OF ENVIRONMENTAL ENGINEERS - BETWEEN REALITY AND HOPE ? INTERACTIONS AMONG CLIMATE, VEGETATION AND SOILS IN RADUCANENI ? IASI AREA ? DISTRIBUTION OF MIXING INTENSITY OF OXYGEN-VECTOR DISPERSIONS IN AERATED...
Autori:
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25669

Temperature distribution in the vacuum directional solidification system influenced seriously on the impurities concentration andmicrostructure in Polycrystalline Silicon. In this study, a numerical model for the transient global heat transfer for directionsolidification process has been developed by the finite element method (FEM). A two-dimension numerical simulation fortemperature distribution of directional solidification process was carried out using software Multi-physics Comsol 3.5a. Ther...
Autori: Guoqiang Lv, Wenhui Ma, Hua Wang, Xiangyang Mei, Kuixian Weihttp://www.ecozone.ro/reviste.php?RID=25671

The main phenomenon of coagulation is that particles aggregate to form floc. The formation of floc and cluster was simulated with computer in two-dimensional space using particle-cluster aggregation model and the properties of floc were analyzed using fractal theory. The effect of sticking probabilities on floc structure, density and porosity were analyzed. With the sticking probability increases, the simulated floc structure is gradually loose, floc density is gradually lower, the porosity is g...
Autori: Wanchun Tan, Yunbo Wang, Changbo Jiang, Shiquan Sun, Hong Chen, Xiaobao Niehttp://www.ecozone.ro/reviste.php?RID=25675

Fuel injection system, intake system and the geometric shape of combustion chamber are the three key factors to the fuel-air mixture and combustion process for diesel engine. long with the need of high power density in diesel engine, the pressure of intake is higher increasingly. Together with the effect of high pressure fuel injection, the fuel-air mixture and combustion process is hard to spread as usual. In this circumstance, the performance of power, heat efficiency and emission in diesel en...
Autori: Shang Yong, Liu Fu-Shui, Li Xiang-Ronghttp://www.ecozone.ro/reviste.php?RID=25704

This paper presents a study of the numerical simulation applied for unsymmetrical dimethylhrazine (UDMH) gas dispersion. This study considers an assumed UDMH store conditions and provides important data regarding the relation between the concentration distribution of UDMH and dispersion distance from the source based on the computation fluid dynamic (CFD) software FLUENT. The simulation results show that the ventilation vent and distance of dispersion play an important role in the concentration ...
Autori: Zhiyong Huang, Guofeng Jin, Xuanjun Wanghttp://www.ecozone.ro/reviste.php?RID=25712

The permanent magnet EDS train has been considered to be one of the most promising urban transportation vehicles due to its particular characteristics: simple configurations, low energy consumption, low noise, and suitable for high speed conditions. In order to study the characteristics of permanent magnet Electrodynamic Suspension (EDS) system, an experimental mechanism was established in this paper. The optimization of Halbach magnet array has been carried out and appropriate track for the EDS...
Autori: Zhiqiang Long, Guang He, Ning He, Zhizhou Zhanghttp://www.ecozone.ro/reviste.php?RID=25713

Abstract:A specific topical issue both for small hydropower plants and wind turbines refers to the discrepancy between the relatively lowspeed of the water turbine/wind rotor and relatively high speed of the electric generator: the turbine/rotor has higher performancesat lower speeds, while the generator performances are increasing with the speed. Usually, this problem can be solved connecting aproper speed increaser between the turbine (increaser input) and generator (increaser output). Besides...
Autori: Codruta Jaliu, Oliver Climescu, Radu Saulescu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25732

Abstract:In order to capture as much solar energy as possible, the photovoltaic converter has to follow the sun movement during a day; thiscan be achieved by a tracking system. Most tracking systems have complex and costly structures that can provide wide anglevariations. This paper presents a geared linkage that is build up by a planetary system of gears fitted on a linkage, and thus helpsin reaching wide angles. Starting from a patented linkage, which reaches ≈200° angular strokes, by a...
Autori: Dorin Diaconescu, Ioana Hermenean, Nora Creanga
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25736

Abstract:A comparative analysis is drawn on the energetic responses numerically simulated for Brasov, Romania location, delivered bytwo mono-axial pseudo-equatorial STCs (solar thermal collectors): a flat plate STC and a STC with heat pipes; the two systemsare destined for future implementation on Transilvania University Campus. Accordingly, two tracking programs are consideredfor the diurnal motion: a) of 1h constant duration steps, for school courses interval (September-June) and b) 1-step pro...
Autori: Maria M. Vatasescu, Veronica E. Dombi
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25740

Abstract:This technical paper presents some aspects concerning the static finite element analysis of a wind turbine blade. For themanufacturing of the blades for a 10 kW wind turbine elaborated at the Technical University of Moldova composite materialsmade up of polyester matrix reinforced with fiber glass are being used. In order to determine the mechanical properties of theproposed composite materials 10 different samples of laminated composite plates were numerically simulated in ANSYS 11....
Autori: Marin Guţu, Viorel Bostan
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25747

Abstract:For the optimal working of the concentrating photovoltaic systems (CPV), these are usually tracked, and the accuracy required infollowing the sun path is much higher than in non-concentrating system. The paper focuses on the synthesis of the optimal steptracking program of an azimuth tracking system, used for accurate tracking of a CPV system. The paper presents the synthesismodelling algorithm and the numerical simulations for a CPV system, orientated with an azimuth tracking system, i...
Autori: Ioana Sinziana Hermenean, Ion Visa
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25748

Abstract:A thermodynamic model for accurately predicting the overall efficiency and power output of a solar assembly using a Stirlingengine is presented. It is based on the application of the First Law of Thermodynamics for Processes with Finite Speed and usesthe Direct Method. The proposed model could also be used to better design receivers that concentrate the solar radiation and toproperly size the receiver cavity for a dish solar concentrator. Examples of the optimization of the performance ...
Autori: Alexandru Dobrovicescu, Camelia Stanciu, Dorin Stanciu, Georgiana Tirca-Dragomirescu, Monica Costea, Stoian Petrescu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25763

Abstract:A thermodynamic model for studying the overall efficiency and power output of a solar assembly using a Stirling engine ispresented. It is based on the application of the energy and exergy balance equations to the system components. The results of theproposed model are generated as a function of solar incident radiation whose analytical estimation is presented. The numericalapplication is set for a solar assembly operating in Bucharest, composed by a parabolic dish mirror, a plane receiv...
Autori: Adina Gheorghian, Alexandru Dobrovicescu, Camelia Stanciu, Dorin Stanciu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25764

Abstract:The aim of this paper is to propose a set of thermal models for the regenerator by taking into account the time dependent heattransfer processes, and to combine them with the thermodynamic lumped description of the solar Stirling engine, accordingly torecent description.By using analytical and numerical methods, the optimum power of the engine is sought when various constrains (or not) areconsidered, particularly fixed heat transfer rate available at the source.A sensitivity analysis of...
Autori: Alexandru Dobrovicescu, Andreea Marin, Catalina Dobre, Georgiana Tirca-Dragomirescu, Michel Feidt, Monica Costea
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25767

Abstract:The work presents the results in investigating the thermal behaviour of passive solar elements, for expanding the existing analysisand prediction methodologies. The interest focuses on solar control through natural shading with deciduous plants. This providesa natural path for incorporating all advantages the passive behaviour, available throughout the year. The simulation of thedynamic energy performance of building elements is developed, starting with a physical modelling of the vario...
Autori: Angelos D. Tzachanis
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25768

Abstract:The present study proposes a comparative analysis on the clean electric energy response given by two types of PV (photovoltaic)tracking systems implemented on the same location: the azimuth and the pseudo-equatorial. The analysis is done based on analgorithm applied on the two-axes and one-axis systems. The tracking is done according to various laws, obtained by combiningdaily, seasonal and annual tracking programs. The algorithm and the comparative analysis are exemplified, by numerica...
Autori: Dorin Diaconescu, Maria Monica Vatasescu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25770

Abstract:In this paper, photo-catalytic process for treatment of phenolic wastewater by TiO2 nano powder immobilized on concrete surfacein a recirculation hydraulic flow was investigated. The process affected by different operational conditions that the optimum onescould be obtained from variables interchange. Taguchi method as a proper method for design of experiments and optimizationwas used to find optimum conditions. Selected five parameters at four levels were consists of initial phenol con...
Autori: Bita Ayati, Hossein Ganjidoust, Mohammad Delnavaz, Sohrab Sanjabi
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25778

Abnstract:In recent years, solar receivers have been employed in several applications where high temperature fluids are involved, such aspower plants and solar thermal reactor. The possible presence of high temperature gradients could determine reduced receiverefficiency and a short life of the material. Thermal and fluid dynamic analysis of the receiver allows to highlight possible presenceof temperature gradients and to evaluate their values and the more critical zone of the material. Compress...
Autori: Alina Adriana Minea, Oronzio Manca, Salvatore Tamburrino, Sergio Nardini
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25779

Abstract:In this paper, the mathematical model is improved by considering the density variations of the liquid from the pollution source vs.pollutant’s concentration of this liquid and by including the sorption-desorption term (SDT), which takes into account thisphysical process, played by a first-order decay model defined by two coefficients and an exponent. In order to practically use thisimproved mathematical model, the authors inferred the calculating relationships from automatic processin...
Autori: Daniel Bucur, Esmeralda Chiorescu, Gheorghe Ţigaret
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25783

Abstract:The aim of the present study is the optimization of biosorption conditions using a metal tolerant actinomycete (strain 723) for the removal of lead ions from waste water in batch and dynamic flow mode. The optimum conditions for lead biosorption by the strain were determined as initial pH 3.0, biomass amount 2.0 g L-1, and initial metal concentration 400 mg L-1 in the batch condition. The maximum lead biosorption performance was obtained with a 19 mm diameter column, a 1 mL min-1 flow r...
Autori: Ayşe Betül Karaduman, Maria Julia Amoroso, Mustafa Yamaç, Sergio Antonio Cuozzo, Zerrin Pat
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25811

This paper presents a mathematical model for the prediction of pollutant transport in rivers. The model has been developed and calibrated using the Matlab software and relying on field data from Romanian Someş River (collected in case of accidental cyanide release). Field data has been used to estimate model parameters (e.g. dispersion coefficient, velocity) as variable in time and space in order account for river features non-uniformity in time and also in space. These initial parameter va...
Autori: Elisabeta-Cristina Ani, Vasile Mircea Cristea, Paul Serban Agachi
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25848

This paper presents original studies about the influence of mineral and/or organic fertilization on the minerals contents (P, Na, K, Ca, Mg, Fe, Mn, Zn, Cu, Ni and Pb) in leguminous plants from permanent grassland situated in a hill area of Banat County. Determination of minerals in grassland is very important both for the nutritional or toxic effects of these elements and their compounds, in the plants, animals and environment. Phosphorous was analyzed colorimetric and all the others metals hav...
Autori: Alexandru Moisuc, Iosif Gergen, Monica Harmanescu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25858

In this paper, Cadmium and Zinc removal from soil by phytoremediation was investigated. The experiments were carried out with two types of plants, Brassica napus and Triticales sp. Response surface modeling and optimization of Cd and Zn removal rate was performed for each type of plant under controlled conditions, i.e. as a function of Cd concentration, Zn concentration and pH. Although the maximum heavy metal uptake (i.e. 2.4 % Cd removal rate and 1.80 % Zn removal rate, respectively) was obtai...
Autori: Corneliu Pohontu, Gabriela Soreanu, Igor Creţescu, Matei Macoveanu, Paula Caraiman Cojocaru
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25881

AbstractThe detection of environmental pollutants has challenged conventional chemical analysis for the rapid estimation of thebioavailability and toxicity of the contamination impact on human health and ecosystems. Magnetic nanoparticles (MNPs)functionalization as bioreporters can enhance the ability for biosensing in complex contaminated samples such as soils, and theimmobilization of bioreporters will promote the detection of gas and online monitoring. In this study, Acinetobacter baylyi ADP1...
Autori: Aizhong Ding, Cheng Chen, Dayi Zhang, Musen Duan, Steven F. Thornton, Wei E. Huang, Yanjun Luo
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25952

AbstractA comprehensive evaluation methodology for water environmental carrying capacity (WECC) has been proposed. It is based ona new definition of WECC and reasonable evaluation models compared with vector norm method for water resources supply,environmental assimilative capacity, and society supporting capacity. Evaluation index of WECC is determined for Xi’an city,depending on characteristics of the water environment in Xi’an and selection principles of WECC evaluation index. Three-layerstru...
Autori: Jun Zhang, Qi Zhou, Ya-qian Zhao, Yani Geng
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25960

AbstractDue to rapid growth in both population and economic development in China, water demand is increasing dramatically andChina is facing more and more severe water scarcity problems. Thus competitions for water (between uses, users and regions) areincreasing which make water use efficiency an important issue in China, together with the uneven spatial and temporaldistribution of water, all of which drive the Chinese government and water planners to find the optimal water resource allocationpl...
Autori: Adrian T. McDonald, Linda See, Martin Clarke, Yanan Jiang
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25961

A fast economic development in China over thelast three decades has lifted hundreds of millions ofpeople out of poverty. However, an annual GDPincrease of over 10% due to the large scale industrialactivities and fast urbanization has released substantialamounts of pollutants into the environment and exertedtremendous pressure on local ecosystems. Although alarge amount of investment has been made by theChinese government and a series of efforts have beenmade by the environmental regulators, scie...
Autori:
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25965

AbstractWastewater streams and particularly industrial effluents tend to increase in volumes and to get more complex in terms ofpollution. Nevertheless, nowadays the focus is directed towards recycling or reuse of treated wastewater so as to close the wateruse loop. Advanced wastewater treatment allows these possible applications by achieving good quality effluent to suit the newpurposes, but the implementation of this treatment stage is a difficult task. This study gives an example on how to ap...
Autori: , Daniela Cailean, Florina Ungureanu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25971

AbstractEfficient large-scale recycling of polymeric wastes for automotives is of increased interest from ecologic and economic point ofview and represents an important goal for the car recycling industry. One alternative is to develop novel composite materials,relying on waste car parts, for indoor or outdoor large-scale applications, without using small molecular plasticizer or otheradditives but insuring a good compatibility for large percentages of thermoset plastics in the composite. Previo...
Autori: Anca Duta, Cristina Cazan, Dana Perniu, Mihaela Cosnita
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25982

This special issue of EnvironmentalEngineering and Management Journal is dedicated tointerdisciplinary research and discusses multipleresults addressing environmental issues inElectromagnetic Compatibility (EMC) andEngineering in Medicine and Biology (EMB) areas.Some of the most significant researchdirections considered in this issue entail theelectromagnetic pollution together with a survey ofelectromagnetic environment in order to analyze andquantify the biological and health effects ofelectro...
Autori:
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25990

AbstractThe aim of this study is to carry out a theoretical investigation of the extremely low-frequency (ELF) magnetic fields produced bytypical configurations of overhead power lines of the Romanian power grid. The computation of the magnetic flux density isachieved by the following two approaches: i) using an interactive LabVIEW program developed on fundamental formulas and ii)by numerical modeling with FEMM 4.2, a software package based on the finite-element method. Analytical results are th...
Autori: Alexandru Salceanu, Eduard Lunca, Marcel Istrate
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25995

AbstractThe use of planar electromagnetic technology led to the improvement of high frequency characteristics of the structures and thedecrease of their size and profile, which made them easier to integrate in different devices. In order to improve these planarstructures, it is known that the parasitic capacitance (EPC) must be decreased. Another method to achieve a better functionality isto increase or decrease the high frequency losses, according to their use. Because the previous studies were...
Autori: Adina Racasan, Calin Munteanu, Claudia Hebedean, Claudia Pacurar
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25996

AbstractThis paper presents the most recent developments regarding the square spiral inductors inductance evaluation. The study wasperformed in order to develop, implement and validate powerful software, CIBSOC able to determine the inductances of spiralinductors and also to optimize the spiral inductors layouts.We have studied the inductance variation of square spiral inductors. The four modules of the CIBSOC software were described,applied for the computation of inductance and the optimization...
Autori: Adina Racasan, Calin Munteanu, Claudia Hebedean, Claudia Pacurar, Vasile Topa
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25997

AbstractThis paper analyses mathematical models and numerical simulation results for a notional miniature, planar, spiral transformer(MPST) fabricated in MEMS technology, for galvanic separation, proposed to equip an electric harvesting device (EHD). Twotypes of core – ferrite and (partially) magnetic nanofluid – are considered. We found that magnetization body forces occur in thesuper-paramagnetic nanofluid core and they result in complex, steady state flows consisting of fully 3D recirculation...
Autori: Alexandru Mihail Morega, Jean Bogdan Dumitru, Lucian Pîslaru-Dănescu, Mihaela Morega
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25998

• STUDIES ON HEAT RECOVERY FROM CELLULOSIC TEXTILES FINISHING WASTEWATER    • ASSESSMENT OF SYNERGIC REGULATORY ACTIONS OF SPRUCE BARK EXTRACT AND DEUTERIUM DEPLETED WATER ON MAIZE (Zea mays L.) CROPS    • LUNG CANCER RISK INDUCED BY RESIDENTIAL RADON IN CLUJ AND ALBA COUNTIES, ROMANIA    • A CLEAR SKY IRRADIATION ASSESSMENT USING THE ESRA MODEL AND SRTM DATABASE    • ENVIRONMENTAL FACTORS ASSOCIATED WITH DYSPHONIA IN PROFESSIONAL VOICE USERS    ...
Autori:
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26014

AbstractThe HR BREACH model is a physically based numerical model for the simulation of breach initiation and formation throughembankment dams, dykes, and flood embankments. The model is used for the analysis of homogenous as well ascomposite/zoned embankments. Simulation can also include the effect of surface protection such as grass or rock blocks. Twobreach failure modes are available: failure by overtopping and failure by piping. Breach growth can proceed through surfaceerosion or head-cut e...
Autori: Andreja Jonoski, Ioana Popescu, Mark Morris, Mohamed Hassan, Tseganeh Gichamo
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26017

AbstractIn this work, cyclic voltammetry (CV) and differential-pulsed voltammetry (DPV) were used to detect pentachlorophenol (PCP)at two types of multi-walled carbon nanotubes (CNT)-based composite electrode, i.e., TiO2-modified-CNT-Epoxy (TiO2-CNTEpoxy)and CNT-Epoxy in 0.1 M sodium sulphate solution supporting electrolyte. The electrochemical behaviour of theelectrodes was investigated in the absence and presence of UV irradiation. A single oxidation peak at a potential value of about+1 V vers...
Autori: , Ágnes Jakab, Aniela Pop, Cornelia Bandas, Florica Manea, Joop Schoonman, Rodica Pode
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26033

AbstractThere are many treatment methods used to remove color from textile wastewater, and Fenton oxidation, a well known AdvancedOxidation Process is one of the most efficient. Apart of Fe(II), other metal ions have been used as catalysts in Fenton’s Reagent,and Cu(II) proved to be a good alternative.In this study the effect of the concentration of dye, catalyst and hydrogen peroxide were studied and optimized for thediscoloration process of Reactive Black 5 using a Fenton-like process, H2O2/Cu...
Autori: Andrei-Petru Bertea, Armand-Florin Bertea, Romen Butnaru
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26042

In 2012, the Faculty of Hydrotechnics,Geodesy and Environmental Engineering of The"Gheorghe Asachi" Technical University of Iasi,Romania celebrated 50 years of education in the fieldof hydraulic engineering at the Polytechnic Instituteof Iasi.In 1948, in the same time with the EducationReform in Romania, in Galati, the Faculty ofHidrology was founded. At the same time, studentswho were attending the Rural EngineeringSpecialization in Bucharest were also transferred tothe new established Faculty....
Autori:
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26048

AbstractA simplified numerical model of the water distribution network of a medium sized town (with 30,000 inhabitants), of elongatedshape, was implemented in EPANET. The decay of chlorine residual concentration in the above mentioned network was studied,using the extended time analysis capabilities of EPANET, for a 3 days period. The water supply system, composed of one tank, 86pipes and 52 nodes is driven by gravity. The chlorine is injected at the tank with a constant concentration amount. Th...
Autori: Andrei-Mugur Georgescu, Sanda-Carmen Georgescu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26054

AbstractExperiments were designed to optimize the Cr(VI) adsorption on Salvinia cucullata. The significance of different adsorptionparameters along with their combined effect on the adsorption process has been established. A regression equation wasformulated by representing percentage of Cr(VI) adsorption as a function of different independent variables such as contact time,pH, adsorbate concentration and adsorbent dose. The insignificant terms were assessed through student ‘t’ test and are remo...
Autori: Saroj Sundar Baral
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26084

AbstractIn road traffic noise issues, experimental measurements are a relevant element in order to understand the problem and to adjustmodels. Sometimes, when measurements are not possible or in the designing phase, prediction models are used to perform anestimation of the equivalent level produced by a road infrastructure. Usually models parameters are obtained by a statistical datafit and thus they are related to the area where measurements have been performed. These models are suitable for st...
Autori: Gerardo Iannone
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26087

AbstractThe ozone oxidation and disinfection stages constitute important technological phases in the modern systems of water treatment,both as unitary stages as integrated ones into systems that use advanced oxidation processes (AOP). More than half of thewater/ozone contact systems used nowadays in the water treatment plants are based on systems of contact in the bubble column.This work here aims at experimentally analysing, in terms of scale, a water-ozone contact system in the bubble column a...
Autori: Sorin Claudiu Ulinici
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26088

The book edited by Haibo Xie and NicholasGathergood focuses on one of the most importantscientific issues of the 21 century which is thereplacing fossil fuel with sustainable alternatives suchas biomass. Fossil fuels are conventional rawmaterials for many industrial sectors includingchemical and energy production. Usage of fossil fuelis limited by their availability, price and carbonfootprint. Biomass is a renewable resource globallyavailable, cheaper and carbon sequestering. Step bystep shiftin...
Autori: Adrian Catalin Puitel
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26101

Abstract Recently, a new failure probability index was introduced that characterizes the operation of highly sensitive chemical reactors (i.e. when highly exothermic / hazardous reactions are conducted). Based on this, the current paper exemplifies the application of the risk analysis methodology proposed to generate the Pareto optimal operating solutions accounting for reactor productivity maximization (product yield) and probabilistic risk minimization. The multi-objective optimi...
Autori: Anca Dan
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26108

Abstract The paper deals with reinforced soil structures used in critical infrastructures for ecological landfills. During the last 17 years in Romania 28 such landfills were completed. Romania is however a country where strong earthquakes often occur. About 60% of its territory feels the seismic actions which combine with the existing ones. During earthquakes in the massive structures of landfills, huge inertial forces are developing. Due to uncontrolled movements and deformations...
Autori: Cristina Feodorov
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26118

Abstract The article presents the development of a mathematical model concerning thermal desorption in a tubular electric furnace, using the linear regression analysis principle. With a range of experimental data obtained from some laboratory tests on water evaporation plus pollutant (Hexaclorocyclohexane - HCH), evaporation resulting from the application of thermal desorption on some soil samples; a mathematical model was developed to calculate the mass of substance evaporated fro...
Autori: Calin Vasile Prodan
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26125

Abstract The paper presents several aspects regarding the optimization of the operation for a mixed cycle gas turbine, Titan 130S type, installed at S.C. CET S.A. Bacau, during the warm season. The optimization entails the partial loads operation and has been done using the multicriterial analysis, taking into consideration the operation restrictions required for this type of gas turbine. The criteria that regard this analysis are: thermal energy requirements, the global efficiency...
Autori: Marius-Ion Stanila
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26145

Abstract Biogas can be used as a renewable and green energy source by upgrading to natural gas. Water scrubbing, which is one of the most widely-applied upgrading technologies, involves an accurate knowledge of the solubility of the main biogas components in water, which is essential to the design and optimization of the biogas upgrading process. In this work, we use several thermodynamic models available in the Aspen Plus software modeling environment to calculate the solubilit...
Autori: Petronela Cozma
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26148

Abstract The reason for carrying out this research is related to the significant risk of heavy metals present in wastewater on the environment and human health. The removal of heavy metal ions from aqueous solutions was performed in a batch system, using peat (from Poiana Stampei, Romania) as adsorbent. The efficiency of the process was predicted with high accuracy (correlation with experimental data more than 0.99) based on a feed-forward neural network with two hidden layers. The...
Autori: Gabriel Dan Suditu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26150

AbstractWith global climate change, flood disasters occur frequently and detention basins are facing greater flooding risk. The flood riskassessment of detention basins becomes an important content for the management of detention basins.In this study, the index system of flood risk assessment of detention basins in Huaihe River Basin is established according to thenatural and social properties of detention basins flood disasters. The flood risk assessment methods are proposed based on support ve...
Autori: Junfei Chen
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26172

AbstractMethane production and concentration from six cells were investigated in two landfills in China. Long-term monitoring tests wereconducted to evaluate the methane recovery efficiency of active wells. Results showed that the recovery efficiency of a wellsdistribution simulation method was 75.6% to 83.5%, which was much higher than 50.1% to 53.6% when considering the EPAmethod in the EST (Ecological Sludge Evapotranspiration Technology) cover structure. The recovery efficiency of methane in...
Autori: Qiang Xue
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26174

AbstractWith the rapid development of the city, people feel increasingly great pressure. Community Parks are playing more significantroles in people’s daily life. Community Parks with the theme of leisure and recreation provide communication platforms forresidents and have enriched their outdoor activities. The parks not only ease people’s life and work pressure, but also improvecommunication among neighbours. An excellent Community Park not only needs to satisfy residents’ utility requirements,...
Autori: Wenting Wu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26176

AbstractElectrostatic Precipitator draws many researches on flue gas treatment technology and very few researches on its structural design. The conventional structural design of electrostatic precipitator casing uses stiffened flat sheet as wallboard which consumes a great amount of steel. Consequently, a new structural idea was explored to optimize the conventional design which applies profiled steel sheet and locates wall beam and wall column. Optimization codes were programmed to select the o...
Autori: Dengfeng Wang
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26178

AbstractAlong with the rapid economic development of China, the large amount of carbon dioxide (CO2) emission has become constrainton future sustainable development. The Chinese government has established a series of policies to come with the high CO2-emission resulting from economic development with the target to reduce its carbon intensity (CO2-emissions per unit of grossdomestic product (GDP)) by 40-45%, and to decrease the energy intensity (energy consumption per unit of GDP) by 20% by theye...
Autori: Feng Xu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26181

AbstractThe South-to-North Water Diversion Project is a huge project to better utilize water resources available to China, especially forsolving the shortage of water resources in northern china. Increasing attention has been paid to the impact of the project on thegroundwater of water-receiving areas. Beijing is one of the important water-receiving areas of The Middle Route, and the waterwill be transferred into Beijing in 2014. The main objective of this study is to analyze the influence of S-...
Autori: Haizhen Xu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26222

AbstractIn this work the adsorption of Cu2+ and Zn2+ from industrial wastewater by peanut shells without any pretreatment wasinvestigated through optimization techniques such as a feed-forward back-propagation artificial neural network and a simplexalgorithm. The Levenberg-Marquardt algorithm was the best back-propagation algorithm, with a minimum mean squared error of0.000217 for Cu(II) and of 0.000229 for Zn2+. Mean square error on the validation set is used as an estimate for variance.Accordi...
Autori: Başak Mesci
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26227

AbstractIn this work, a four factor three-level Box–Behnken factorial design based on response surface methodology (RSM) wasemployed to optimize the removal of phosphate from synthetic wastewater (mineral salts medium-MSM) by the bacterialconsortium (Bacillus sp. RS-1, Pseudomonas sp. YLW-7, Enterobacter sp. KLW-2). A mathematical model was then developedto show the effect of each medium composition and their interactions on phosphate removal. The effect of the lactoseconcentration (X1), pH (X2)...
Autori: Krishnaswamy Usharani
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26235

AbstractIn this research, response surface methodology (RSM) was applied to model the effect of main operational variables includinginitial pH, initial phosphate concentration, current density and reaction time on phosphate removal by electrocoagulation. It wasfound that the decrease of initial pH and initial phosphate concentration, and the increase of current density and reaction time are beneficial for improving phosphate removal efficiency. According to the ANOVA (analysis of variance) resul...
Autori: Mohsen Behbahani
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26237

AbstractWashing black aluminum (Al) slag to obtain soluble salts is an important stage of the smelting slag treatment at technologicalprocess. This process is used to recover Al as a coagulant for water purification. This research aims at establishing the optimalconditions for washing (e.g. temperature (T), solid: liquid ratio (S : L), time, the recirculation waters in the system). The goal ofresearch was to determine: a) the removal with maximum efficiency of the soluble salts from black Al sla...
Autori: Romanita Teodorescu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26243

AbstractThis paper continues the previous investigations regarding the technology for the Aluminum (Al) recovery as Al sulfate fromblack Al slag. Leaching is the next compulsory step in the Al extraction process. The paper studies the influence of mothersolutions´ (MS) recirculation resulted from the process within the system over the quality of Al sulfate and the siliceous residue(R) and, the aluminum nitride (AlN) hydrolyses in the leaching process. The optimum parameters determined are: *the ...
Autori: Romanita Teodorescu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26250

AbstractHealthcare waste management is one of the most important environmental problems in the world and particularly in Tunisia,because of the potential environmental hazards and public health risks. The collection of infectious healthcare waste is a highlyvisible and important service that involves large expenditures. This study discusses the off-site transport problem of infectioushealthcare waste from the 12 hospitals in the governorate of Sfax (Tunisia) to a planned steam sterilization disp...
Autori: Wafik Hachicha
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26252

AbstractThe purpose of the undertaken research work is to degrade the biopolymeric pigments present in the distillery spentwash. This isdone by direct electro-oxidation using iridium oxide coated titanium mesh as catalytic anode. The effects of current intensity,dilution, pH and time of electro-oxidation were studied. The combined effects were analyzed using Box-Behnken design foroptimization and statistical analysis. The rate constant for first order electrochemical kinetics relating the rate c...
Autori: R. Krishna Prasad
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26253

AbstractThis study is focused on simulating and optimizing design and configuration of anaerobic baffled reactor (ABR) by means ofartificial neural network (ANN). This approach is aimed to assess an efficient ABR performance in various operational conditionstreating municipal wastewater. For this purpose, to analyze comprehensively on a base of experimental data, the system isoperated in two pilots of 48 liters net volume made of 8 compartments. In 7 months, more than 130 sets of data are obtain...
Autori: Gagik Badalians Gholikandi
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26260

AbstractThe significant increase in air transportation expected over the coming decades, combined with the initiation of the emissions trading system (EU-ETS) within European aviation, is increasing the requirement for airlines to find new levels of efficiency in their operating practices leading to reduced emission levels. Technological developments are expected to lead to substantial reductions in fuel burn and emissions over the long term, including aircraft design optimization and the use of...
Autori: Athanasios J. Kolios, Stuart Howe
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26282

AbstractThe objectives of this study were to investigate of cadmium and chromium adsorption from aqueous solutions by using orange (Citrus sinensis var Tampson) and sour orange (Citrus aurantium) mesocarp. The chemometric approach was applied for the optimization of removal percent of Cd2+ and Cr6+. To optimize Cd2+ and Cr6+ removal percent, the effect of four experimental parameters on removal percent was investigated by means of multivariate analysis. The considered factors were Cd2+ and Cr6+ ...
Autori: Maryam Bagheri Ardebilian, Mohammad Ali Zazouli, Pouneh Ebrahimi
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26287

AbstractThis investigation compared the performance of Fenton and photo-Fenton oxidation processes in the treatment of sulfidic spentcaustic wastewater. Response surface methodology, particularly central composite design was used to investigate the effect ofFe/H2O2 and H2O2/COD in assessing treatment process efficiency. Empirical models were developed to describe the relationshipbetween the factors and responses. The models were validated through analysis of variance and were further used in pro...
Autori: Azmi Aris, Mohd Ariffin Abu Hassan, Sharifah Hanis Yasmin Sayid Abdullah, Siti Fadilah Md Noor, Zainura Zainon Noor
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26307

AbstractIn this study, a fuzzy-Markov-based interval stochastic dynamic (FM-ISDP) analysis method is developed for reservoir operationmanagement (ROM). In ROM, uncertainties could be represented as discrete intervals, fuzzy sets, and fuzzy-stochastic forms.FM-ISDP is framed on the integration of interval analysis, fuzzy vertex analysis, stochastic dynamic optimization approaches andthe fuzzy-Markov chain. The developed model is applied to a case of ROM within a multi-user, multi-uncertainty and ...
Autori: Dianzheng Fu, Guohe Huang, Ying Zhu, Yongping Li
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26306

AbstractThis research introduces a new Robust Interval Type-2 Fuzzy Set Linear Programming (R-IT2FSLP) model to manage irrigationwater resources. This method improves upon previous interval fuzzy bound models by allowing uncertainties presented asmultiple fuzzy boundaries. It creates additional degrees of freedom and enable direct modeling of uncertainties within anoptimization framework. It more explicitly reflects the system’s uncertainties under the fuzzy membership function. The more ofR-IT2...
Autori: Guohe Huang, Lei Jin
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26324

AbstractThis paper presents a study of the thermoaerodynamic spectrum inside an asymmetrically heated vertical channel of a doubleskinfaçade. A double-skin façade is an envelope construction that consists of two transparent surfaces separated by an airchannel. The numerical modeling was developed using the Ansys-Fluent simulation software under conditions of forcedconvection, using a three-dimensional geometry and a “k-ε standard” turbulence model. Then, experimental tests were performedon ...
Autori: Cătălin George Popovici, Cătălin Grigoraş, , Theodor Mateescu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26332

AbstractIn the context of the complexity of the environmental system, this paper addresses the problem of environmental modeling,considering the global aspects of sustainability as well as the linkage between environmental and economic issues. The survey onintegrated modeling highlights that the complexity of the environmental problems should be approached on the basis of multidisciplinarycooperation and studies. Furthermore, the European environmental standards and products quality standards im...
Autori: Ion Viorel Matei, Laura Ungureanu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26356

AbstractWireless sensor network (WSN) has been widely used in national defense, military and security, environmental monitoring andmany other fields. It’s of great significance to design WSN which consumes little energy but supports service quality flexibly andeffectively. To further improve the performance of WSN, this article, focusing on aspects of low energy consumption and longlife cycle of the WSN and taking energy limits and coverage requirements in WSN into account, attributes the covera...
Autori: Wenjuan Cheng, Yiming Tian, Yourui Huang
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26359

AbstractThe paper represents the application of a multicriterial analysis for establishing the decisional priorities in the field of impactsgenerated by polluting emissions from large burning installations. The analytic hierarchy process (AHP) method was used inorder to express quantitatively how the environmental protection and sustainable development objectives are met. Based onexperimental determinations carried out on site at Mintia Power Station, Romania and the brainstorming sessions held ...
Autori: Dan Codruț Petrilean
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26398

AbstractPipeline crack-like defects are detected and localized through the monitoring of the transport parameters of the transmissionnetwork. Under SCADA monitoring, accidental gas loss is reduced and the negative environmental impact of the hydrocarbons isavoided. This paper presents a method for the localization of accidental gas leaks, the pressure gradient method combined with afuzzy analysis method, which operates simultaneously both numerical data and lexical arguments in order to accurate...
Autori: Adrian Bucur
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26418

EDITORIALA SPECIAL ISSUE DEDICATED TOSUSTAINABLE TECHNOLOGICAL DESIGN AND OPTIMIZATIONFOR GREEN MECHANICAL AND ENVIRONMENTAL ENGINEERING...
Autori:
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26421

AbstractThe study aimed the diversification of fodder yeast assortments with viable economic effects while reducing the environmentpollution by capitalization of wastewaters with high monosaccharides content from pulp and paper industry and residual wheyfrom milk industry. Using the Response Surface Methodology the fabrication recipe has been optimized according to anexperimental program based on a mathematical model with biomass, protein and residual sugar as response functions. Theculture medi...
Autori: Livia Manea
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26429

AbstractOpen-cycle desiccant air conditioning represents an attractive alternative to the classical method based on electric vaporcompression. The performance of the rotary dehumidifier has a significant effect on the capability, size and cost of the whole airconditioning system. In the present paper a detailed two-dimensional mathematical model of coupled heat and mass transferprocesses manifesting at the moist air-solid desiccant interface has been formulated. It was studied packed bed absorbe...
Autori: Carmen Ema Panaite
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26434

AbstractUnderground space represents an area with multiple management problems, mainly related to water resources management,difficulties for new underground constructions (as diaphragm walls, tunnels, dewatering systems etc.), interpretation of hydrogeologicaldata or influence of the new constructions on the existing ones. The management of this area is even more difficultdue to the multitude of works, of the (sometimes) chaotic development, of the poor legislation, various ownerships of the la...
Autori: Loretta Batali
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26449

AbstractIn this paper, a study is conducted to assess the ability and the accuracy of a CFD approach concerning the behavior of a linearheat source positioned in a test room. Firstly, the main characteristics of our numerical model (mesh generation, turbulencemodel, near wall treatment, radiation model and boundary conditions) are presented after a briefly description of the test roomtaken into account. In addition, we show also the significance of these issues within our CFD approach. Furthermo...
Autori: Raluca Teodosiu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26467

AbstractThe researches were initiated in the context emphasized by the competition having the idea of profit at its base, and sustainabledevelopment, which imposes limitations through different regulations and standards which would involve supplementary costs.The research highlights the main trends in plastic product design in conditions of sustainable development of society. Plasticshave an important role in the configuration of the new products just in the phase of conception. Having in mind t...
Autori: Petrica Corabieru
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26472

AbstractIn this paper, we develop a rigorous theoretical framework and a practical implementation for the evaluation of the energy- andcost-saving potential of buildings. The goal is to promote sustainability in the context of building energetics by achieving themost efficient, optimal exploitation of the financial resources available for refurbishments. The practical realization of thisconcept requires the evaluation of the optimal refurbishment cost that maximizes the net energetic or financia...
Autori: Árpád Csík
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26535

AbstractThis paper presents an optimization procedure to minimize the cost of drying in a solar cabinet dryer based on the results of amathematical model. The model has been developed previously for performance analysis of a solar cabinet dryer. The optimalvalues for geometry of the solar collector, mass flux of air through the collector, and initial moisture content are obtained in away that the drying cost is minimized. The results indicate that to optimize the drying cost, the best values of ...
Autori: Samaneh Sami
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26564

AbstractThe general aim of this paper is to demonstrate the sustainable management of a broad spectrum of wastes (livestock, industrial,agri-food, agricultural and non-recyclable fraction proceeding from waste treatment plants) in an integrated plant. Thetechnological development and practical application of the “Mixed Plant” concept is used to achieve this objective. In order tovalorize in a joint form all the above-mentioned categories of waste, two different processes have been integrated. Th...
Autori: Dolores Hidalgo
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26579

Abstract Cadmium leaching experiments from hazardous waste containing 16.5 wt% CdO were conducted using H2SO4. Dominant experimental and process parameters were determined by factorial design. Six controlling factors were considered, i.e. solidliquid ratio, acid concentration, reaction time, particle size, stirring speed and temperature. Analysis of variance (ANOVA) was used to identify main effects and their interactions. An empirical model, based upon experimental results, was developed to...
Autori: Mahdi Gharabaghi
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26590

Abstract Due to its very low moisture content, the solid waste from the two-phase olive oil extraction process (dry olive mill residue, DOR) can be easily stored and used as a readily available basal liquid culture medium via its reconstitution with water. Five white-rot fungi (namely Phanerochaete chrysosporium NRRL 6361, Lentinus tigrinus CBS 577.79, Pleurotus pulmonarius CBS 664.97, Phlebia radiata DABAC 9 and Botryosphaeria rhodina DABAC P82), previously selected in a screening program, ...
Autori: Alessandro D’Annibale
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26598

Abstract The present study deals with the removal of Cr (VI) from aqueous solution by polypyrrole (PPy). Response surface methodology (RSM) was applied for the design and analysis of experiments in the optimization of pH, temperature, initial concentration, contact time and adsorbent dose during the removal of the Cr (VI). The optimum adsorbent dose, temperature, initial concentration of Cr (VI), pH and contact time were found to be 0.8 g, 46.5 oC, 187.5 mg/L, 5.3 and 15.4 min respectively. ...
Autori: Ehsan Hasani
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26614

OPTIMIZATION OF REDUCTION OF COPPER USING Stenotrophomonas maltophilia PD2 BIOMASS AND ARTIFICIAL NEURAL NETWORK MODELING ...
Autori: Arpita Ghosh
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26616

Abstract A model of an irreversible combined thermionic-thermoelectric generator with internal and external irreversibilities is established in this paper. The performances of the combined generator, in which the heat transfers obey radiative heat transfer law, are analyzed and optimized by using the combination of finite time thermodynamics and non-equilibrium thermodynamics. The general expressions for power output and efficiency versus drop voltage are derived. The influence of finite rat...
Autori: Zemin Ding
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26624

Abstract The interest in waterborne paints amelioration increased lately due to the toxicological effect of certain ingredients on human health, the restrictive environmental legislation and the depletion and escalation in price of raw materials. Research efforts in formulating waterborne paints are directed to insure low volatile organic compounds (VOCs) emission while maintaining and even improving their properties. This paper presents a waterborne paint formulation process. The required ...
Autori: Andrei Ionut Simion
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26639

Abstract The development strategy of the European Union until the year 2020, Europe 2020, militates for an intelligent economy, sustainable and favorable to inclusion. Following these principles, each Member State establishes its targets and action plans at a national level. On the other hand, the rural zones benefit from diverse forms of renewable energy which can assure their development and energetic autonomy, bringing important advantages to the rural community: the diminishing of energy...
Autori: Liliana Topliceanu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26644

Abstract Succinic acid is widely used in different industries, its demand increasing each year. Therefore, efficiently producing it (especially from bio-regenerable sources) is an aspect that researchers try to solve thorough different methods, one of the approaches consisting in using process models for generating predictions and improving production by process optimization. In this work, a combination of two bio-inspired algorithms represented by Artificial Neural Networks and Clonal Selec...
Autori: Elena-Niculina Drăgoi
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26669

Abstract The adaptation of commercially available ion-selective electrodes (ISEs) for use in wastewater matrices was demonstrated using multivariate analysis and optimization with the Microsoft Excel Solver tool. The electrodes were characterized in pure analyte solutions, and their parameters were estimated using multivariate analysis and Solver optimization. The ammonium, nitrate, and nitrite ions were measured in model systems that were designed to simulate wastewater. The accuracy of the...
Autori: Natalija Koprivanac
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26687

Abstract In many coastal areas strong currents may occur from tidal effects, rivers discharges and high waves breaking due to abrupt changes in local topography. The modification of the wave fields by currents and vice versa need to be predicted by reliable nonlinear numerical models, when wave and current coexist along and around the approach tracks of the ports and harbors, or in the areas of ongoing offshore and coastal developments, or in areas subjected to intense navigation. Various wa...
Autori: Angela Ivan
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26695

Abstract Impact damage is considered the primary cause of in-service delamination in composite materials and promotes significant reduction in residual strength. Non-destructive techniques (NDT) include several methods able to detect the shape and the size of the interior damages without destruction of the structure or component, which is economically advantageous. The aim of this paper is to evaluate the properties after low velocity impacts using an experimental-numerical procedure based o...
Autori: Ana Martins Amaro
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26726

Abstract Response surface methodology and central composite experimental design were used to model and optimize the operational parameters of the excess sludge protein extraction yield by ultrasonic wave-assisted extraction. The three variables involved in this research were the ultrasonic extraction time, pH, and temperature. In the range studied, statistical analysis of the results showed that selected variables had a significant effect on protein extraction yield. The optimized extraction...
Autori: Yulin Xiang
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26736

Abstract Along with nowadays growth of urban areas and population, it is more and more important to have better water resources management, especially regarding drinking water supply. Maintaining a good state of a water distribution network poses challenges that are addressed by research community. Two of the main challenges in management of water distribution systems are the reduction of energy consumption due to the high pumping requirements in some systems and/or reduction of water losses...
Autori: Mario Castro Gama
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26747

Abstract Waste management does not try to dispose waste anymore but is searching for the best solution to manage valuable and scarce resources and reduce the negative impact on the environment. Preoccupation in Germany with regard to optimization of waste recuperation and valorization increases and separate collection systems for different waste fractions are taken into consideration. Within this study a pilot project was set up and its results are presented below. The investigation evaluate...
Autori: Mihaela Berechet
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26758

Abstract Thermophilic anaerobic digestion is a suitable technology to treat agricultural waste because of its higher biogas production, hygienisation effect and solids removal efficiency. Although these benefits, poor effluent quality and instability are encountered in some cases. The anaerobic co-digestion of winery waste and waste activated sludge at 55°C, operating at 23 days HRT and with an organic loading rate of 3.2 kg COD/m3d, was characterized by accumulation of volatile fatty ac...
Autori: Cinzia Da Ros
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26775

Abstract Today companies are facing more and more with pressures for reducing carbon emissions, as a consequence of the development of the green movement and because materials continue to generate very large impacts on carbon emissions. In this context, supplier selection is one of the most vital components in purchasing management, which becomes more and more important. However, most of the earlier researchers have not paid enough attention to supplier selection in low carbon supply chain. ...
Autori: Wei Pan
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26799

Abstract The uncertain phenomenon is very complex and using only fuzzy or random variable cannot describe it appropriate. In addition, low carbon is the requirement of the supply chain. In order to overcome those two issues, this paper describes the uncertain phenomenon in supply chain design under fuzzy random environment and constraints on CO2 emission. It considers that the demand rate is a fuzzy random variety, and builds a mixed integer optimization models featuring multiple products, m...
Autori: Zhixue Liao
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26808

Abstract The objective of this paper is to propose an optimal path for a circular economy strategy of Aluminum Corporation of China (CHINALCO) by constructing a circular economy evaluation model. Based on CHINALCO’s resource circulation and the regularity of material balance, and by depicting the value information in the process of resource input, consumption, output and waste, we build a comprehensive evaluation model for the enterprise circular economy - a resource value flow equatio...
Autori: Fei Xiong
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26815

Abstract Large and frequent floods of the floodplain have caused huge loss to local residents in the lower reaches of the Yellow River. Since 1949, the population affected by the flood in the Yellow River has been about 8.87 million, and the submerged cultivated land area has been about 25.6 million acres. In order to provide the basis for flood control and disaster mitigation, it is very important to build a loss assessment model to evaluate flood damage. In this study, the relationship fun...
Autori: Xianqi Zhang
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26816

Abstract It has been shown that the scale of damage in buildings with steel reinforcement, due to direct lightning strikes, is insignificantly small compared to lightning effects on buildings with no such steel reinforcement. Observed small-scale damages are also confined to points of strike; hence the only risk for occupants and properties is injury or damage caused by falling materials. A large number of such cases have been observed in Sri Lanka and Malaysia. All damaged structures, obser...
Autori: Chandima Gomes
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26821

Abstract The uncertain phenomenon is very complex and using only fuzzy or random variable cannot describe it appropriate. In addition, low carbon is the requirement of the supply chain. In order to overcome those two issues, this paper describes the uncertain phenomenon in supply chain design under fuzzy random environment and constraints on CO2 emission. It considers that the demand rate is a fuzzy random variety, and builds a mixed integer optimization models featuring multiple products, m...
Autori: Zhixue Liao
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26824

Abstract The application of Information and Communication Technologies (ICT) for water supply systems has steadily increased in the last 20 years. The city of Milan is presented as case study where the main challenge for the coming 20 years is the efficient use of energy. Opposite to other parts of the world, in Milan, water is neither scarce nor there is a growing need for supply. Given that the system completely relies on pumping, optimization algorithms and sensor technologies can be appl...
Autori: Mario E. Castro Gama
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26826

Abstract There is an increasing variety of hydrometeorological information sources available for operational water management. These comprise in-situ measurements, Earth Observation, meteorological models, and hydrological models. The effective use of all these information sources together is challenged by two aspects. First, there is an information and communication technology (ICT) challenge of acquiring, processing, merging, and presenting the various data streams operationally. Secondly,...
Autori: Isnaeni M. Hartanto
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26827

Abstract Decision support systems (DSS) have been wildly developed in the recent decades, in various areas of decision making. In the 21st century, the advances in Information and Communication Technology (ICT) have brought the era of cloud computing, in which network-distributed resources (simulation and optimization models, data, etc.) are integrated in decision support applications. The aim of the present article is to present the application of web-based decision support systems (WBDSS) ...
Autori: Quan Pan
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26832

Abstract The paper describes a numerical analysis concerning the behaviour of Cu and Ni based catalysts having different mole ratios of Ni to Cu in the process of glycerol hydrogenolysis. The impregnation technique was used to prepare the copper and nickel based catalysts. Our study revealed that their performances are different and depends on the Ni/Cu ratio. The catalysts were tested using various reaction conditions, such as time and temperature, and their performances analysed based on t...
Autori: Adriana Marinoiu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26843

Abstract Solar energy is one of the most important renewable resources due to its unique set of advantages. In urban configurations, wide open spaces used for parking areas close to malls, stadiums and industrial areas become justified challenges in revaluating them by placing solar panels on their wide roofs. The paper is a first attempt that reflects the scientific interest in the particularities of wind action upon the solar panels sustained by structural framed elements and which cover ...
Autori: Elena Axinte
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26849

Abstract The traditional industrial parks (TIPs) in China has been rapidly developed in the past 30 years, which have contributed to stable and continuing GDP growth, but also caused severe pollution. In order to solve the conflict between local economic development, environmental pollution and resource shortage, the TIPs in China should be transformed to eco-industrial parks (EIPs). However, the eco-transformation of China's TIPs is still at an exploratory stage. So, the paper studies e...
Autori: Jiang Wang
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26855

Abstract This work presents the optimization of process variables to maximize the percent of Fe (II) removal, R (%), by chelating resin Purolite S930 from 34% CaCl2 solutions. To study the combined effect of the initial solution pH, initial Fe (II) concentration and resin dosage was used a 23 orthogonal central composite design and Response Surface Methodology (RSM) for analysis of experimental data. To optimize the regression equation was used The Gradient method. The study discovered that ...
Autori: Camelia Popa
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26856

Abstract On the basis of a generalized irreversible Carnot heat engine (GICHE) model with the losses of heat resistance, heat leakage and internal irreversibility, the local stability of the heat engine at the maximum ecological function (MEF) is studied with Newton’s heat transfer law between working fluid and heat reservoirs. It is derived that a general expression of relaxation time described as stability of the system refers to heat capacity C, overall heat transfer surface area F,...
Autori: Lingen Chen
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26859

Abstract Superintensive growth of fish in a controlled environment involves taking a series of measures to ensure the oxygen necessary to provide optimal living conditions for stocks. Considering the fact that oxygen has a relatively low solubility in water, the photosynthesis in basins does not occur and the rate of incoming water may be low, it is imperative to supplement the water with oxygen. The paper presents theoretical researches on mathematical modelling and numerical simulation of ...
Autori: Vasilica Ştefan
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26871

Abstract The Waste Management activity (WM) is an urban action becoming more and more important in the municipal economy. In many cities, this activity is linked to significant revenues from the selective waste collection services. Because the current economic situation requires an increasing efficiency and profitability in order to succeed in cutting the operational costs, and as an important part of revenue comes from this selective waste collection activity, the effectiveness must be impr...
Autori: Gabriel Murariu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26872

Abstract Safe operation of highly thermally sensitive industrial reactors is still considered a major issue in chemical engineering practice. The problem becomes even more stringent when highly exothermic reactions are conducted under randomly fluctuating operating variables, and especially when the set-point is located in a close vicinity of the runaway boundaries for increasing the reactor productivity. This study is aiming to derive the runaway boundaries and their associated region of co...
Autori: Constantin Muscalu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26884

Abstract Establishing a management system for collecting and disposing the solid waste materials is of great importance in urban areas. Belgrade, the capital city of Serbia, is at its initial phase of managing this problem. Currently, landfill disposal is the main option for dealing with rapidly growing amounts of waste. This paper’s research goal is to estimate the landfill gas quantity at Belgrade’s only landfill site Vinca, and to estimate the potential for collection and util...
Autori: Vesna Alivojvodic
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26923

Conductive-diamond electrochemical oxidation processes are promising technologies for treating biorefractory industrial wastes with organic loads below 20000 mg L-1. In this work, electrochemical oxidation of a real industrial pharmaceutical wastewater with conductive-diamond anodes has been studied. The electrolyses were carried out in discontinuous operation mode under galvanostatic conditions, using a bench-scale plant equipped with a single compartment electrochemical flow cell. For optim...
Autori: Joaquín Ramón Domínguez
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26927

Moving bed biofilm reactor (MBBR) technique is a useful technology for the treatment of mature landfill leachate. The reactor start-up and acclimation processes illustrated that many factors, such as biomass, C/N ratio, and influent volumetric loading rates, could affect the ammonium-nitrogen (NH4+–N) and COD removal. The factorial experiments were carried out to determine the optimal reactor operational conditions, and the results demonstrated that when DO 2-4 mg/L, pH 7.5, and hydraul...
Autori: Wei Li
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26932

In this paper, the classical adiabatic model was chosen. The assumption of perfect gas working fluid was replaced by that of a real gas working fluid. This last assumption was defined by the van der Waals state equation. A Gamma type Stirling engine functioning with a maximum filling pressure of 10 bars was used to carry out experiments. Both theoretical models: the Perfect Gas Adiabatic Model (PGAM) and the Real Gas Adiabatic Model (RGAM) were applied to the Gamma Stirling engine. The influ...
Autori: Ramla Gheith
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26937

The influence of key process parameters of homogenous catalytic ozonation using ferrous or manganese catalysts on the mineralization rate of salicylic acid (SA), model pharmaceutical pollutant, in water was investigated. In order to assess the combined influence and interactions of studied process parameters as well, the empirical/statistical approach applying Box- Behnken experimental design (BBD) combined with response surface methodology (RSM) was applied. Three numerical and one categori...
Autori: Kresimir Koricic
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26939

In this study, response surface methodology (RSM) method was applied based on a five-level and four-variable central composite design. The optimization of the C.I. Direct Red 81 (DR81) removal by the combination of electrocoagulation (EC) and UV processes was also performed. The effect of initial pH, reaction time, current density and initial dye concentration on the dye removal was investigated to obtain the optimal experimental conditions. The optimal conditions with the dye removal of 95% ...
Autori: Elmira Pajootan
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26942

The coastal zone accommodates some of the most diverse ecosystems in the world and offers a wide range of ecosystem goods and services; therefore it has become a focal point of human development. Over the last five decades, starting from 1960s, Kuwait has seen a tremendous alteration in the natural coastal morphological landscape (CML) due to the tremendous increase on coastal population that existed 50 years ago to the present manmade environment today. Most of the population is located in ...
Autori: Saji Baby
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26947

Treatment of domestic wastewater using constructed wetland system vegetated with Phragmites australis was studied at lab scale. Response surface methodology (RSM) a mathematical model was employed for analyzing the effect of independent factors (inlet flow rate, outlet flow rate, retention time) on wastewater parameters e.g. electrical conductivity, BOD5, COD, nitrates, phosphates, total solids, suspended solids, heavy metals in order to maximally treat wastewater. All independent variables w...
Autori:
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26999

This paper presents a mathematical model developed to solve the problem of adequate blending composition for copper smelting process and it is exclusively for the purpose of the case study in "RTB BOR" (Copper Smelter in Bor). The model proposes an objective function, which maximizes the profit by calculating both the “penalties” for the hazardous concentrate elements and “benefits” for the useful ones. Apart from the basic constraints of the existing mathema...
Autori: Ivan Jovanović
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27002

Accidents in spent nuclear fuel reprocessing plants are a critical issue for the safety of people, of operators and the environment, as well as for the security of the plants. The purpose of this work is to demonstrate the possibility to use a free license code to simulate radiological diffusion after an accident in these particular plants, in order to obtain a model which allows identifying escape routes for the people potentially involved in the fallout. The authors performed a benchmark an...
Autori: Mariachiara Carestia
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27015

The aim of this study was the diversification of fodder yeast assortments with viable economic effects while reducing the pollution to the environment by capitalisation of wastewaters with high monosaccharides content from pulp and paper industry. As inoculum, in the bioreactor, a mixture of two species of yeasts Candida utilis and Candida arboreea (1:1 ratio) was used at 38°C, pH 5.5 and an air flow of 0.02 L/h was insured. Wastewaters from technological process of pulping of softwood wi...
Autori: Andrei I. Simion
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27028

The issues of global warming and reducing energy consumption led to an evolutionary progress of research to find as many solutions as possible for solving these environmental issues. The need to ensure a sustainable energetic development while achieving effective protection of the environment has led to the amplification of activities based on secondary energetic resources combined with low energy consumption industrial technologies. In the present paper it is discussed how to recover thermal...
Autori: Timea Gabor
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27030

The need of hydraulic structures for the improvement of the navigation conditions on the Danube, between Calarasi and Braila (km 375 and km 175), led to the development of studies regarding the environmental impact. The studies were made by correlating the dynamic implementation of hydraulic works with the results of the environmental monitoring, biotic and abiotic factors. The hydraulic works designed to be built-up on the Bala branch, raised issues regarding sturgeons’migration in thi...
Autori: Alina-Florina Nicolae
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27036

This article refers to the fourth stage of the hydropower development of Bistrița River, upstream of the Izvorul Muntelui impoundment, in the Borca-Poiana Teiului area. The original project (described in chapter 2) was altered during the execution of works. The changes which have been made are significant: a decrease of the headrace area by 32% and the location of the power plant has been changed. The magnitude of these changes might lead to the idea that either the original project or t...
Autori: Costel Boariu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27048

Dam’s behavior monitoring is highly influenced by the existence of an appropriate instrumentation system installed in structure’s body, its foundation and in the neighboring area as well as by the periodical acquisition, collection, processing and interpretation of data. Existing monitoring systems may be enhanced with mobile labs that can perform regular or special measurements. Hybrid models appear to be an attractive option for the evaluation of the static and/or the dynamic be...
Autori: Altan Abdulamit
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27065

A test for quantifying the contribution of colour and scale to the visual impact of buildings in the rural setting was developed and validated by means of a public opinion survey. The method was based on some psychological aspects of visual perception and on a simple image treatment performed by a well known and easily available computer program. Results were provided as numerical values, enabling the quantification of the impact for the two individual elements studied and for their potential in...
Autori: María Jesús Montero-Parejo
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27080

This study highlights the potential use of yellow Zea mays seed chaff (YZMSC) biomass as a biosorbent for the removal of Cr3+, Cd2+ and Pb2+ ions from aqueous solutions. Fourier transformed Infrared analysis of the biomass suggests that YZMSC biomass is basically composed of cellulose and methyl cellulose. The biosorption capacities, qmax, of YZMSC biomass for Cr3+, Cd2+ and Pb2+ are 14.68, 121.95 and 384.62 mg/g respectively. Biosorption equilibrium was achieved at 20, 30 and 60 min for Cr3+...
Autori: Jonathan Oyebamiji Babalola
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27083

Experimental research focus on the emission characteristics of a diesel engine employed a new combustion system-double swirl combustion system (DSCS) is carried out. The influence of spray angle on diesel emission characteristics with DSCS is analyzed by experimental and numerical method. Main emissions such as particulate matters (PM) and nitrogen oxidants (NOx) are measured in diesel engine with DSCS and the original engine. Also, fuel consumption, combustion pressure, heat release rate are...
Autori: Liwang Su
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27087

There is an extensive literature covering a number of considerations for installing noise barriers to protect living areas. In fact, noise barriers are the most popular mitigation measure on major roads across Europe. This paper aims to review some situations where the use of noise barriers is not fully recommended. Fortunately, there are available wide ranges of technical noise solutions as an alternative to the barriers. What we propose in this article is to create a simple procedure to hel...
Autori: Alina Mihaela Petrovici
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27088

The direct measurement of the nutrients largely contributes to understand how the quality of the information, coming from the instruments, may improve the performances of the plants. The advanced knowledge acquired on the meaning of the signals gives new possibilities to control the biological processes and estimate the operational state of the plant, improving the quality of the effluent and keeping the operational costs as low as possible. Such information, furthermore, can be used to under...
Autori: Carmine Fiorentino
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27127

In this study, a mathematical model was introduced to calculate the collection efficiency of dust particles in a wire-pipe single-stage electrostatic precipitator (ESP). The aerodynamic diameters of these particles are less than 10 μm (PM10). The mathematical model, using combined Deutsch-Anderson Equation, considers coupling effects among gas flow field, electric field and particle field. A simplified 2-D ESP model was established using GAMBIT and a software application (FLUENT) was used to ...
Autori: Jian-Ping Zhang
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27172

There has been a growing amount of work on microbial fuel cells (MFCs) in the last years, both on the microbiological issues and on the engineering ones, which managed to increase power outputs by an order of magnitude. However, they are technically still far from attaining acceptable levels of power output. Therefore, it is necessary to go deeper in understanding the mechanisms involved in electricity production with MFCs and use this new knowledge to achieve significant increases in power outp...
Autori: Vânia Oliveira
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27187

Hexavalent chromium, Cr(VI), is one of the toxic heavy metals released into the environment by a number of industries, so it is crucial to limit its further discharge into the environment. In the present study, the aerobic reduction of Cr(VI) to less mobile and less toxic Cr(III) by Aspergillus niger was investigated. The potential of this fungus strain as biocatalyst was capable of resisting Cr(VI) up to 300 mg/L. The effects of the process parameters such as solution pH, initial Cr(VI) concent...
Autori: Farshid Ghanbari
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27194

Following the current trend in fossil energy saving, emphasized both by sustainable economy principles and by environmental protection constraints, the electrical equipment producers are in competition for delivering high efficiency products on the global market. The fabrication of electrical motors is already regulated through efficiency product standards; complying with them represents a continuous tough challenge for manufacturers. The paper outlines the normative frame for developing energy ...
Autori: Cristina Mihaela Gheorghe
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27197

This paper presents an advanced numerical algorithm for the optimization of the current density distribution in electrochemical applications. The optimization principle consists in the distortion of the electric field by an insulating shield properly positioned between the electrodes. Such a distortion influences the distribution of current density at the electrodes under consideration. The electrochemical problem is approached by a Laplace equation which is numerically solved using a mesh-free ...
Autori: Alexandru Avram
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27199

In order to limit personnel exposure to electromagnetic fields, safety standards provide among others, limitations in terms of induced currents in limbs, which is the measurable quantity allowing the evaluation of thermal load in limbs in the real conditions of electromagnetic radiofrequency exposure. Using a clamp-on current meter, eleven subjects were measured for current passing through their feet during the use of backpacked radio equipment, configured in various operating modes while using ...
Autori: Annamaria Paljanos
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27204

In this study, Response Surface Methodology (RSM) was applied to investigate both the effects of biodiesel percentage in fuel mixture and engine operating parameters (engine load and engine speed) on emission characteristics (unburned hydrocarbons (HC), CO and NOx) of a diesel engine. The optimization of biodiesel percentage in fuel mixture and engine operating parameters also was performed using the desirability approach of the response surface methodology for lower emission characteristics. Th...
Autori: Alireza Shirneshan
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27217

In this research, Response Surface Methodology (RSM) was employed to optimize five operating variables including initial pH, current, reaction time, initial hexavalent chromium concentration and dosage of polyaluminum chloride as a coagulant for the removal of hexavalent chromium and its relative operating cost by electrocoagulation process. Central Composite Design (CCD) was applied for the optimization process. The results showed that increase of polyaluminum chloride dosage was beneficial for...
Autori: Sepideh Sadeghi
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27230

Studies about microwave (MW) sludge conditioning method have dealt mainly with municipal secondary sludge processing. We considered necessary to examine the applicability of the microwave process for other type of sludge, such as primary sludge originating from the food industry. The aim of our work is to identify the main influential operating parameters of MW pre-treatments applied for primary meat processing wastewater sludge (MPWS) as a conditioning process, followed by their optimization fo...
Autori: Sándor Beszédes
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27236

Availability of alternate fuels for cogeneration helps to limit the amount of bagasse as fuel at sugar plants and make them available for other uses such as paper manufacture or ethanol production. Due to the increased awareness on the adverse effects of carbon dioxide emission on the environment, power plant operators are compelled to reduce emissions of pollutants during cogeneration. Selection of low pollutant fuels, tapping of renewable energy and use of efficient operating policies can help...
Autori: Faisal Pazheri
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27244

The purpose of the reservoir operation during flood period is to obtain the outflow hydrograph as flat as possible. Although simple in case of a unique reservoir, the problem becomes very complex for large systems with cascade reservoirs. Based on the well-known hydraulic software Mike Flood by DHI, a simulation-optimization model containing wave propagation equations, constraints related to the state or decision variables as well as an objective function were developed for obtaining optimal coo...
Autori: Aurelian Florentin Draghia
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27295

The present study proposes a chlorination schedule calibrated for the Drinking Water Distribution Network (DWDN) of Buzau - a medium sized city, in South-Eastern Romania. The numerical model of Buzau's DWDN was set up in EPANET, considering the main pipes of the network that interconnect 4 pumping stations and 45 booster stations (viewed here as end-users). The calibration of the numerical model was based on real-time recordings available for January and July 2014. The chlorination schedulin...
Autori: Sanda-Carmen Georgescu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27301

Ground water is an important source of clean water supply throughout the world. A growing literature on the management of groundwater which takes into account the interaction of groundwater with surface water resupply sources (e.g., streams or lakes) is driven by concerns of intensified global fresh-water use coupled with increasing industrial and agricultural pollution levels. Our joint laboratory and numerical experiments simulate water withdrawals via two pumping wells from an unconfined aqui...
Autori: Anca Marina Marinov
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27302

Construction industry uses a huge quantity of traditional and modern building materials which generally are produced to satisfy different demands, such as: resistant and safety requirements, friendly with the environment, architectural aspects etc. Researches must solve any requirements related to materials properties and offer a large diversity from which the proper solution must be considered. For improving the mechanical properties of polymer concrete, the use of fibers of different types is ...
Autori: Vasilică Ciocan
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27306

The global renewable energy share should reach and exceed 30% by 2030. Mini-scale hydropower installations are environmentally-friendly technologies, unlike large hydroelectric power plants that have certain drawbacks from the environmental point of view. A safe and clean solution is the cross-flow turbine, but the commercial types require a minimum head, usually captured by additional hydro-technical works that can also damage the environment. In this context, a very good solution could be a lo...
Autori: Daniela Popescu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27343

In the process of underground coal mining a complex network of vertical, horizontal and inclined mine workings with the purpose of extraction, transportation and evacuation to the surface are utilized. The mining workings are also being utilized for ventilation network system, which is also used for ensuring the oxygen supply necessary for workers, as well for diluting explosive gases and/or toxic substances and, ultimately, for exhausting the heat resulted from underground workings. For air flo...
Autori: Marius Simion Morar
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27372

In this study, a decision support system based on a stochastic optimization model under modeling uncertainty and parameter certainty (SOMUM-DSS) is developed for petroleum-contaminated sites management. The SOMUM-DSS incorporates scenario analysis, numerical simulation, multivariate analysis, nonlinear optimization within a decision support system. It provides an effective tool for decision makers to select the optimal remediation strategy. The developed SOMUM-DSS is then applied to a petroleum-...
Autori: Qi Yang
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27374

This study was to optimize the fermentation process for protein enrichment of potato starch residue (PSR) by solid state fermentation with mixed strains. Three single-factor experiments were conducted to optimize the fermentation conditions, and a Plackett-Burman design followed by a central composite design of response surface methodology was investigated to optimize the medium constituents. The optimal fermentation conditions were fermentation temperature 28°C, fermentation period 72 h and...
Autori: Heng Lei
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27380

• EXPERIMENTAL INVESTIGATION OF TEMPERATURE EFFECTS ON THE PARAMETERS OF PHOTOVOLTAIC PANELS    • CONCENTRATIONS OF CHROMIUM, CADMIUM AND NICKEL IN TWO CONSUMED FISH SPECIES OF PERSIAN GULF, IRAN    • IMPROVING THE ENERGY EFFICIENCY OF RESIDENTIAL BUILDINGS BY USING A DRAIN WATER HEAT RECOVERY SYSTEM    • ASSESSMENT OF METAL CONTAMINATION AND ECOLOGICAL RISK IN URBAN SOILS SITUATED NEAR A METALLURGICAL COMPLEX    • FINANCIAL DE...
Autori:
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27398

EXPERIMENTAL INVESTIGATION OF TEMPERATURE EFFECTS ON THE PARAMETERS OF PHOTOVOLTAIC PANELS    • CONCENTRATIONS OF CHROMIUM, CADMIUM AND NICKEL IN TWO CONSUMED FISH SPECIES OF PERSIAN GULF, IRAN    • IMPROVING THE ENERGY EFFICIENCY OF RESIDENTIAL BUILDINGS BY USING A DRAIN WATER HEAT RECOVERY SYSTEM    • ASSESSMENT OF METAL CONTAMINATION AND ECOLOGICAL RISK IN URBAN SOILS SITUATED NEAR A METALLURGICAL COMPLEX    • FINANCIAL DEVELOPME...
Autori:
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27399

A light-driven dissipative engine, which must necessarily operates at a nonzero rate and far from equilibrium to be capable of providing power and work, is investigated in this paper. On the basis of the assumptions that the heat exchange between the working fluid and the environment obeys the linear phenomenological heat transfer law [ q  (T 1) ], the piston trajectories minimizing the entropy generation are determined. Furthermore, numerical examples are provided for...
Autori: Lingen Chen
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27432

The partial nitrification bioreactor (PNBR) was operated at a constant temperature and an influent synthetic wastewater pH of 35°C and 8.5, respectively. The effects of dissolved oxygen concentrations (DO), hydraulic retention times (HRT), and the nitrogen loading rates (NLR) on the ammonium removal efficiencies and the NO2-N/NOx-N ratio were investigated. The activity of nitrite oxidizing bacteria was stimulated at high DO concentrations. The highest NO2-N/NOx-N ratio of 0.76 was obtained a...
Autori: Sukru Aslan
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27455

In recent years, increasing temperatures and extreme weather conditions have had a significant impact on quality of life, especially in terms of the environment. Governments have made environmental preservation a priority and have received public support in turn. We formulate models to investigate a company’s optimal production quantities over two periods, including green technology efforts, to examine the impact of a carbon trading policy. We build separate inter-temporal production mode...
Autori: Changsong Ma
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27469

To assess energy conservation and emission reduction effect on traffic and transportation at macro level more scientifically, the evaluation system based on the improved osculating value method for transportation is established. Information entropy weight is introduced to the traditional osculating value method and the numerical matrix normalization process in the osculating value method is simplified. The pollutant emission and the energy consumption is defined as negative index, and the capaci...
Autori: Yang Yang
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27470

The delignification of wood pulp using hydrogen peroxide and xylanase enzyme in an ultrasonicator was studied at different process conditions. The factors influencing the chemical delignification were studied simultaneously using the Box-Behnken design of experiments. The mathematical model for Kappa reduction as functions of consistency of the pulp, concentration of peroxide and the temperature of delignification was developed. The response optimization studies for minimizing the Kappa numb...
Autori: Palaniappan Ramesh
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27480

In the current work, a numerical model for the prediction of temperature, air velocity, relative humidity and ammonia distribution released by sheep and goats manure inside a naturally ventilated livestock building is presented. Given that noteworthy amount of gaseous pollutants are emitted by the agricultural and animal husbandry activities, the study of the indoor microclimate is essential to be investigated for the healthy growth of the breeding livestock. The developed numerical model is sat...
Autori: Catherine Baxevanou
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27482

Fly ash ponds are dangerous for the environment because the fly ash can cause multiple harmful effects. This is cause for major concern for researchers and industry people alike. The rise of the water table level inside the ash structure may cause a loss of stability over time, with adverse effects on the environment. Therefore it is necessary to adopt efficient solutions to ensure the stability of ash ponds and rapid measures that can be applied. The use of geosynthetic materials has proven to ...
Autori: Lidia Niculiţă
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27483

An experimental design methodology was applied to study the copper removal from aqueous solutions by immobilized nanoscale Lentinus edodes. The effect of the various variables (biomass loading, initial metal ions concentration, PH, contact time, agitation speed and temperature) were studied in the batch experiment. The results showed that pH, contact time and agitation speed were the most significant variables on biosorption of copper ions determined by Minimum Run Equireplicated Res V Design...
Autori: Rong Chen
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27487

A large number of microorganisms are capable of producing cellulases; however, fungi are considered among the most active enzymes producers. Different strains of white rot fungi (WRF) were reported to have a great potential for biotechnological applications and cellulase enzymes is much involved in this effect, especially for bioethanol production. Misiones is included in a forest region characterized by a vast biodiversity, and within this environment, a large number of microorganisms can be...
Autori: Ernesto M. Giorgio
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27489

The phenol degradation capacity of Serratia marcescens NSO9-1 isolated from olive mill wastewater was evaluated and optimized in this study. Plackett-Burman design coupled with Box-Behnken methodology was used to evaluate the effects of medium components and significant parameters on phenol degradation by this relevant strain. According to Plackett-Burman-based statistical screening, seven of the eleven components of the medium had a significant effect on the metabolism of phenol degradation. Th...
Autori: Nurdan Saraç
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27495

This study aims to obtain high performance cement under friendly environmental conditions, through the optimization of clinkerization process. The influence exerted by mineralizers i.e. fluoride (NaF, KF) or oxide (CuO, TiO2) on the Portland clinker characteristics and derived cement properties is presented in this experimental study. The presence of these additions in low concentration (i.e. 0.5-0.8 wt. %) permits the reduction of the burning temperature (with 20oC up to 70oC) of raw mix and mo...
Autori: Jenica Paceagiu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27500

Fungal isolate Aspergilius niger V-8 (IITB) was isolated from the sludge of anaerobic digester of distillery wastewater treatment plant and was found to be an appropriate fungal isolate for the purposes of decolourization of anaerobically digested molasses spentwash (ADMS). The study aimed at optimization of the environmental parameters for achieving maximum decolourization of ADMS using isolated fungal species. Environmental parameters like initial pH, mixing, immobilization and surfactant a...
Autori: Mrityunjay Singh Chauhan
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27502

This paper highlights the utility of rice husk ash for the adsorption of Cr(VI) ions from aqueous solutions. Rice husk ash (RHA) is produced when rice husk is burnt for various purposes. Application of Treated Rice Husk Ash (TRHA) as an adsorbent for the removal of Cr(VI) from aqueous solutions has been investigated. For this purpose, RHA was thermally treated. RHA and treated RHA (TRHA) were characterized by XRD, SEM and FTIR to investigate the effect of treatment on the nature and surface char...
Autori: Varsha Srivastava
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27504

The optimization of household waste collection in China is facing more complex and structural problems related to waste reduction and recycling than that of disposal. A rigorous decision-making model of matter-element analysis (MEA) combined with the analytic hierarchy process (AHP) is developed to validate the feasibility and practicality of five alternatives to separated waste collection. This model is based on a survey of residents’ cognition and inclination toward the optimization o...
Autori: Haibin Chen
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27520

This paper describes the preparation and use of a low cost biosorbent made of castor leaves for the extraction of Cu(II) from an aqueous medium. The biosorbent was characterized by Fourier transform infrared spectroscopy (FTIR), surface area and pore diameter measurements. The results showed absorption bands of carboxylic and amide groups at 1738 and 1540 cm-1, respectively, and the measured surface area was 1.3728 ± 0.0160 m2 g-1, with predominance of microporous < 10.51 Å. ...
Autori: Milene S. Pereira
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27540

Based on principal-agent model, this paper tries to solve the asymmetric information problem between the investor and agriculture leading enterprises. A mathematical model of the incentive contract is designed, on the basis of which it is investigated the design of the incentive contract under different risk preference, the change of the income when implementing the incentive contract and the changing trends of the contractors’ costs when an observable variable is included in the incentiv...
Autori: Xitai Sheng
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27547

In this study major factors affecting the phenolation process of lignosulfonate (LS) waste liquor (recovered from pulp and paper industry) were optimized in order to improve LS substitution for replacing petroleum-based phenols during phenolic resin manufacturing. Four different parameters, namely phenol/lignosulfonate ratio, time, temperature and lignosulfonate waste liquor concentration, were varied in an experimental program having as response function the reaction yield. Response Surface Met...
Autori: Andrei Ionuţ Simion
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27551

Livestock production is under growing public and scientific scrutiny for its greenhouse gas (GHG) emissions. This article contains a preliminary assessment of the inclusion of upstream life-cycle GHG emissions in concentrated feeds design, using the most common nonlinear programming optimization algorithms to determine feed composition. First, GHG emissions are included as costs in a single criteria optimization problem. The unit price of GHG emissions was obtained using a genetic algorithm. Sec...
Autori: Ricardo F.M. Teixeira
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27572

This study dealt with investigation of arsenic removal from groundwater using electrocoagulation (EC) method in a batch mode by the Box-Behnken experimental design method. Effects of some cations like Ca, Fe, Mg, Mn and operating time on the removal were explored by an air injected EC reactor. The combined effects of these variables were analyzed by the quadratic model for predicting the highest removal efficiency of arsenic from groundwater. The arsenic removal efficiency was found to be depen...
Autori: Mehmet Kobya
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27584

In this study, Ag/TiO2–P25 nanoparticles prepared via photodeposition method and its textural properties were characterized using X–ray diffraction (XRD), transmission electron microscopy (TEM), UV–vis diffuse reflectance spectroscopy (DRS), and N2 physisorption techniques. The cements modified with TiO2–P25 and Ag/TiO2–P25 nanoparticles were immobilized on tile plates, and their photocatalytic activity was evaluated versus the removal of Erioglaucine as the model o...
Autori: Mohammad A. Behnajady
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27589

This work describes the application of Fenton’s like system (H2O2/Cu2+) assisted by microwaves to the removal of phenolic compounds from olive mill wastewater (OMWs). The effect of various operating conditions, namely copper ion concentrations (X1), hydrogen peroxide (X2), time of irradiation (X3) and microwave power (X4) were evaluated by factorial design of experiments. Results showed that X1, X2, X3 and X4 had significant effects on the response followed by the interactions X1X2, X1X3, ...
Autori: Hamida Iboukhoulef
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27602

With anticipation of global warming and climate change, quantitative prediction of future precipitation trend is more important than ever. Global circulation models (GCMs) are widely used as the base for simulating climate change. However, due to their coarse resolution, researchers have been using various downscaling techniques to produce finer model for regional use. Recent advancements in metaheuristic algorithms have provided an alternative approach in downscaling. This paper introduces the ...
Autori: Sze Miang Kueh
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27604

The present work aimed to optimize a new economic medium for biopolymers production by Rhizobium leguminosarum. Biopolymers were poly-β-hydroxybutyrate and exopolysaccharide (EPS and PHB). They were extensively used in various industrial sectors. Statistical experimental designs and Response Surface Methodology were employed to optimize the medium components. A central composite design was applied to increase the production yield and predict the optimal values of the selected factors. An op...
Autori: Mohamed Sellami
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27609

Increased concern about global warming in today’s world has led to the legislation of regulations that seek to gradually reduce the amount of greenhouse gases emitted by industrial sectors and along their supply chains. This study focuses on the amount of carbon emitted in a two-echelon supply chain in which one supplier delivers a single product to a group of retailers and attempts are made to integrate and coordinate its different members. A mixed integer programming model is thus develo...
Autori: Seyed Hesameddin Anvar
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27610

Aiming at river network in a complicated river-lake system, a new water environmental carrying capacity (WECC) calculation method was presented based on multi-objectives including water quality objectives for rivers, water quality objectives for control sections, pollution zones length at the sewage outlets and pollution zones area at the external lake inlets. The river network to the northwest of Lake Taihu was selected as the study area. Based on this new method, the WECC fluctuation was an...
Autori: Hua Wang
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27627

FLUCTUATION OF RIVER NETWORK WATER ENVIRONMENTAL CARRYING CAPACITY IN A COMPLICATED RIVER-LAKE SYSTEM    • MINERALOGY AND GEOCHEMICAL DISTRIBUTION OF HEAVY METALS FOR THE FAGUL CETĂȚII TAILINGS, ROMANIA    • ACCUMULATION AND AVAILABILITY OF TRACE ELEMENTS FROM SOIL INTO ORIENTAL TOBACCO GROWN IN MACEDONIA    • OLFACTORY EFFECT ON LANDSCAPE PREFERENCE    • EFFECT OF MOLASSES ADDITION AS BIODEGRADABLE MATERIAL ON PHENOL REMO...
Autori:
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27628

The growth of a non-axenic Phormidium bigranulatum-dominated mat was tested under a range of chemical parameters and types of substrate. Total biomass yield (in term of mg chlorophyll a) of mats grown on muslin cloth (0.64 mg) and cotton mesh (0.62 mg) were significantly higher than those on other substrates, such as, nylon net (0.50 mg), sands of river Sone (0.43 mg) and river Ganga (0.30 mg), rice husk (0.38 mg) and saw dust (0.21 mg). The Phormidium mat would be easy to handle in bioremdation...
Autori: Dhananjay Kumar
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27635

In this work, PM2.5 removal mechanism was explored to investigate PM2.5 collection efficiency under the influences of applied magnetic field and diffusion charging (the main charging mode for submicron particle). The proposed electrostatic precipitators (ESPs) mathematical model considered three-field interaction between fluid field, electromagnetic field and particle dynamic field. CFD software FLUENT was used to generate the simplified solid structure of the ESP. In numerical calculation, t...
Autori: Jian-Ping Zhang
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27667

In this study, we consider a potential Finnish solution to sustainable energy production to satisfy the European Union's forestrelated energy policies related to climate change. Conventional energy production includes a number of fossil fuel, peat, and renewable fuel procurement chains that supply a combined heat and power (CHP) plant during different periods of the year. In Finland, peat is commonly used as fuel by energy plants. However, it is not environmentally friendly because it is ...
Autori: Teijo Sakari Palander
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27672

This paper presents decentralized and centralized decision-making conditions based on consumer carbon sensitivity and carbon tax policy in a supplier-driven two echelons supply chain. The analysis shows that: 1) the optimal emission reduction amount under centralized decision-making is more than that under decentralized decision-making; 2) the carbon tax should be levied properly because the carbon emission reduction will decrease as the carbon tax is higher than a critical value; 3) the consume...
Autori: Lan Bai
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27691

Bottled water (commonly called mineral) makes an important source of minerals for humans. Its consumption has been systematically rising in the highly industrialized countries, even though not every water type has appropriate health properties. As a result, drinking bottled water ought to be supported with understanding its qualities and physicochemical content. The following article presents the results of the research into pH levels, electrical conductivity, selected inorganic anions (F-, Cl-...
Autori: Rajmund Michalski
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27693

The reuse of sewage sludge will be increasing in the future, with expansion of sewerage works and advanced sewage treatments. During anaerobic digestion of sewage sludge from wastewater treatment plants the humification of organic matter will have an important effect on the physico-chemical forms of heavy metals. The aim of our paper was to investigate mobility of zinc from dried anaerobic sludge (DANS) from municipal wastewater treatment plant (WWTP) via single step (simultaneous) extraction pr...
Autori: Vladimír Frišták
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27695

• INFLUENCING FACTORS OF THE ACCEPTABLE AMOUNT OF COMPENSATION OF FARMERS FOR CONTROLLING FERTILIZER-INDUCED WATER POLLUTION    • DETERMINATION OF THE RARE EARTH METALS IN THE RED MUD FOR POSSIBLE UTILIZATION    • Fe(II) AND Mn(II) REMOVAL FROM CONTAMINATED GROUNDWATER BY ADSORPTION: A COMPARISON OF ACTIVATED CARBON AND PINE BARK    • RESPONSE OF UPLAND COTTON GENOTYPES TO SALINITY AT EARLY GROWTH STAGES    • KINETICS AND ISOTH...
Autori:
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27782

Application of a biological treatment system using white rot fungi is an interesting alternative for treatment of water and wastewater contaminated with persistent organic pollutants, such as polycyclic aromatic hydrocarbons (PAHs). A packed bed bioreactor using the white rot fungi, Phanerochaete chrysosporium (P. chrysosporium) was evaluated for degradation of pyrene and phenanthrene in polluted wastewater. White rot fungi have significant potential to metabolize organic pollutants such as PAHs...
Autori: Mahsa Baniasadi
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27767

• INFLUENCING FACTORS OF THE ACCEPTABLE AMOUNT OF COMPENSATION OF FARMERS FOR CONTROLLING FERTILIZER-INDUCED WATER POLLUTION    • DETERMINATION OF THE RARE EARTH METALS IN THE RED MUD FOR POSSIBLE UTILIZATION    • Fe(II) AND Mn(II) REMOVAL FROM CONTAMINATED GROUNDWATER BY ADSORPTION: A COMPARISON OF ACTIVATED CARBON AND PINE BARK    • RESPONSE OF UPLAND COTTON GENOTYPES TO SALINITY AT EARLY GROWTH STAGES    • KINETICS AND ISOTH...
Autori:
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27729

• INFLUENCING FACTORS OF THE ACCEPTABLE AMOUNT OF COMPENSATION OF FARMERS FOR CONTROLLING FERTILIZER-INDUCED WATER POLLUTION    • DETERMINATION OF THE RARE EARTH METALS IN THE RED MUD FOR POSSIBLE UTILIZATION    • Fe(II) AND Mn(II) REMOVAL FROM CONTAMINATED GROUNDWATER BY ADSORPTION: A COMPARISON OF ACTIVATED CARBON AND PINE BARK    • RESPONSE OF UPLAND COTTON GENOTYPES TO SALINITY AT EARLY GROWTH STAGES    • KINETICS AND ISOTH...
Autori:
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27730

This paper presents the effect of heavy metal soil pollutants (Pb, Cd, Cu, Zn) on soil mite communities in three urban parks within Bucharest, Romania: Cişmigiu, Unirea and Izvor. For each park, the investigations were based on three transects that were established in relation to the nearest source of air pollution i.e. heavy traffic from the main boulevards. The study was carried out in 2007. 405 soil samples were collected, comprising 14 species of Gamasina. The highest numerical density ...
Autori: Minodora Manu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27736

The development of Multi-Energy Systems (MES) or District Energy Systems (DES) requires suitable design and operation optimization tools, in order to assess their feasibility and economic profitability. These tools can be helpful in choosing the proper technologies and also in the perspective of defining proper incentive or taxation schemes. A critical result of the analysis of MES is that, when optimizing their design, the operation strategy and the part load behavior of the units must be consi...
Autori: Matteo Zatti
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27795

The development of Multi-Energy Systems (MES) or District Energy Systems (DES) requires suitable design and operation opti-mization tools, in order to assess their feasibility and economic profitability. These tools can be helpful in choosing the proper technologies and also in the perspective of defining proper incentive or taxation schemes. A critical result of the analysis of MES is that, when optimizing their design, the operation strategy and the part load behavior of the units must be cons...
Autori: Marco Migliore
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27796

The research has been focused on concretes in which the continuous phase is some kind of polymeric resin and the discrete phase is some type of mineral aggregate. Such composite materials are known as Polymer concretes (PC) and boast several advantages such as lower weights, higher resistance to corrosive environments and chemical attacks, faster curing and lower permeabilities. In PC the inorganic fraction can reach up to 90% of the total and is made up of aggregates such as sand and gravel. Th...
Autori: Paolo Pozzi
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27799

The development of Multi-Energy Systems (MES) or District Energy Systems (DES) requires suitable design and operation opti-mization tools, in order to assess their feasibility and economic profitability. These tools can be helpful in choosing the proper technologies and also in the perspective of defining proper incentive or taxation schemes. A critical result of the analysis of MES is that, when optimizing their design, the operation strategy and the part load behavior of the units must be cons...
Autori: Marco Migliore
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27803

The analysis by numerical simulations can be applied to building materials subjected to different climatic conditions to envisage the influence of environmental factors in terms of drying time, water absorption and thermal performance of materials. Currently there is a wide variety of new building materials used for insulation, waterproofing and rehabilitation, each contributing in a specific way to constructions improvement during their service life. In time, every building is subjected to degr...
Autori: Alexandra Alisa Găină
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27863

The goal of the present work is to evaluate the efficiency of bioventing on low permeability soils stimulated with hydraulic fractures and polluted by a mixture of semi-volatile and non-volatile hydrocarbons. A synthetic non-aqueous phase liquid (NAPL) composed of 5 hydrocarbons is prepared: 1,2,4-trimethylbenzene (TMB), methylcyclohexane (MCE), n-dodecane (n-C12), n-decane (n-C10), n-eicosane (n-C20). The capacity of indigenous bacteria to degrade high NAPL concentrations is evaluated with biov...
Autori: Dimitra N. Tzovolou
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27849

This paper presents the results of experimental researches regarding the optimization of a decontamination process through thermal desorption of soils contaminated with crude oil. The optimization was performed for the following desorption parameters: heating temperature of the soil and the treatment duration, by increasing the temperature from 300°C to 350°C and decreasing the treatment duration from 10, 15 and 20 minutes to 5, 10 and 15 minutes. The economic calculation of the decontam...
Autori: Dorina Pop
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27846

Advanced oxidation process is getting tremendous importance in the treatment techniques for the removal of nonbiodegradable organics from wastewater due to its ability to completely mineralize the pollutants. It uses different methods to produce hydroxyl radicals which are responsible for oxidation of pollutants. In this work, studies on Fenton, ultraviolet radiation (UV) and UVhydrogen peroxide processes for removing acetamiprid, a neonicotinoid insecticide from aqueous solution are carried ...
Autori: Puthenkattil Abdukunji Fasnabi
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27895

In this research, a support vector regression and Monte Carlo simulation-based interval two-stage programming (SVRMC-ITSP) method was developed through integrating support vector regression (SVR) and Monte Carlo simulation into a two-stage intervalstochastic programming (TISP) framework. The developed SVRMC-ITSP method can effectively tackle dynamic, interactive and uncertain characteristics of municipal solid waste (MSW) management systems. It can also be used to simulate waste generation r...
Autori: Chao Dai
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27905

A system dynamics (SD) process-based simulation model was developed using an object-oriented environment to simulate phosphorus (P) transformations in a two-stage pilot scale Dewatered Alum Sludge Cake (DASC) based Constructed Wetlands (CW), which is operated from February 2009 to January 2010 to treat relatively high concentration animal farm wastewater. Structural Thinking Experiential Learning Laboratory and Animation (STELLA v9.1.4) conceived on the principles of SD was used for the deve...
Autori: Lordwin Jeyakumar
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27907

In this study, Mg-doped ZnO nanoparticles with 2% Mg content were synthesized by sol-gel method. The structure and morphology of the nanoparticles were characterized by TEM, BET and UV-Vis absorbance techniques. From TEM image, it was found out that the nanoparticles had uniform size and uniform distribution. BET analysis revealed that in comparison with pure ZnO, Mg 2%/ZnO nanoparticles had a higher specific surface area. Based on UV-Vis absorbance analysis, Mg 2%/ZnO nanoparticles shifted t...
Autori: Nahide Zarei
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27909

The aim of this study was to produce high quality activated carbons from Diplotaxis harra biomass by potassium hydroxide activation and their application in heavy metals removal. To reduce the number of experiments, full factorial experimental design at two levels (24) was carried out to occur optimal preparation conditions for efficient removal of cadmium and cobalt ions from aqueous solutions. Different variables influencing activation process, such as carbonization temperature (500–6...
Autori: Hanane Tounsadi
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27934

• ENVIRONMENTAL CHANGES IN NORTH-EASTERN ROMANIA – A TRIGGER FACTOR FOR LYME DISEASE    • HYDROGEOCHEMISTRY AND ENVIRONMENTAL ISOTOPE COMPOSITIONS AND THEIR EVOLUTION IN GEOTHERMAL GROUNDWATER IN YIZHANG, HUNAN PROVINCE, CHINA    • CONSTRUCTION OF A BIOGAS HEAT STORAGE GREENHOUSE ECOSYSTEM UNDER THE CONTEXT OF WATER POLLUTION RESULTING FROM LIVESTOCK BREEDING    • ENVIRONMENTAL NOISE: HEALTH AND POLICY - AN UP TO DATE MINIREVIEW  &nb...
Autori:
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27946

• ENVIRONMENTAL CHANGES IN NORTH-EASTERN ROMANIA – A TRIGGER FACTOR FOR LYME DISEASE    • HYDROGEOCHEMISTRY AND ENVIRONMENTAL ISOTOPE COMPOSITIONS AND THEIR EVOLUTION IN GEOTHERMAL GROUNDWATER IN YIZHANG, HUNAN PROVINCE, CHINA    • CONSTRUCTION OF A BIOGAS HEAT STORAGE GREENHOUSE ECOSYSTEM UNDER THE CONTEXT OF WATER POLLUTION RESULTING FROM LIVESTOCK BREEDING    • ENVIRONMENTAL NOISE: HEALTH AND POLICY - AN UP TO DATE MINIREVIEW  &nb...
Autori:
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27947

The manner in which individuals deal with stressful situations depends on several variables. Personality characteristics, event circumstances, preparedness of individual, personal appraisal of events, pre-existing organizational and personal stressors are all key factors. Psychological resistance to stress can be the result of spontaneous evolution, or can be developed through special training, through programs that increase the threshold beyond which functional alterations may occur, resulti...
Autori: Izabella Kovacs
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27958

The influence of the piston effect in subway tunnels depends on a train speed, the geometry of a tunnel and a train, the types of air flow caused by mechanical ventilation and other variable characteristics. Tables and graphs of changes in air flows generated by the effect of the piston are presented depending on the speed of a train and the degree of fill rate of a tunnel. It is noted that the piston effect is characterized by two phases. At the first stage, the piston effect and the process...
Autori: Omar Lanchava
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27959

The current paper is an overview on previous and ongoing research carried out by the authors concerning the use of Computational Fluid Dynamics for the accurate classification of hazardous Ex areas generated by flammable gases, for the optimization of computational simulation of air-methane mixture explosions by using ANSYS CFX and FLUENT and for calibrating computational simulations of gas explosions using the Schlieren effect. These research works containing analytic studies have led to the...
Autori: Vlad Mihai Păsculescu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27962

Human behavior in critical situations is at the core of all concerns about the fire safety of buildings, regardless of their destination. The way in which the human caught in the fire reacts to the risk factor to which he is exposed, his behavioral response to the direct action of the fire, or his psychological response to the effect of the fire (temperature, smoke opacity, reduced visibility, exposure to toxic combustion gases), are all factors that can drastically influence the required saf...
Autori: Marius Cornel Şuvar
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27965

Watercourses that transit rural / urban areas are susceptible to the phenomenon of aquatic pollution due to various types of polluting species. The important issues of river pollution and of polluting species dispersion, require an approach with predictive tools (models for transport of polluting species) which can evaluate the performance of depollution measures/actions to reduce pollution and to take optimal management decisions. Thus, from January 2017 to May 2017, a monitoring investigati...
Autori: Lorand Toth
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27967

• ENVIRONMENTAL CHANGES IN NORTH-EASTERN ROMANIA – A TRIGGER FACTOR FOR LYME DISEASE    • HYDROGEOCHEMISTRY AND ENVIRONMENTAL ISOTOPE COMPOSITIONS AND THEIR EVOLUTION IN GEOTHERMAL GROUNDWATER IN YIZHANG, HUNAN PROVINCE, CHINA    • CONSTRUCTION OF A BIOGAS HEAT STORAGE GREENHOUSE ECOSYSTEM UNDER THE CONTEXT OF WATER POLLUTION RESULTING FROM LIVESTOCK BREEDING    • ENVIRONMENTAL NOISE: HEALTH AND POLICY - AN UP TO DATE MINIREVIEW  &nb...
Autori:
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27968

This study evaluates the environmental impacts of four types of frozen food packages throughout their lifecycle and suggests strategies for reducing their related environmental impacts. The four most widely used frozen food packaging materials were chosen for this study: (1) pouches composed of low-density polyethylene (LDPE) film; (2) pouches composed of polyethylene terephthalate (PET) and LDPE film laminate; (3) cardboard boxes coated with LDPE; and (4) multipackage composed of cardboard boxe...
Autori: Daina Kliaugaite
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27979

In this paper, four different kinds of the Ant Colony Optimization Algorithm (ACOA) are used to find optimal solution for sewer network design optimization problem proposing two different formulations for each of them. In both proposed formulations, the decision variables of the problem are cover depths of sewer network nodes. In the second formulation, the constrained version of ACOA is used to find optimal cover depths of the sewer network nodes. The constrained version of ACOA is used here...
Autori: Ramtin Moeini
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27987

This study aims to define a municipal Solid Waste Management (SWM) strategy using Multi-objective Optimization Problem (MOP) and ELECTRE method. Four waste treatment technologies were considered: recycling, composting, incineration and landfilling. Firstly, a Multi-objective Linear Programing (MOLP) model was developed. The solutions obtained from this model were ranked using the ELECTRE method. It was considered as case study a hypothetical city of 1,000,000 of inhabitants, presenting the a...
Autori: Rafaella de Souza Henriques
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27998

Dairy wastewater has been a major environmental concern because of massive effluents characterized by high pollution load. This study reports the influence of initial pH (pHi), residence time (τ) and elapsed time (t) on the %COD removal (Y1) and specific energy consumed (kWh per kg of COD removed, Y2) for real dairy industry wastewater treatment in continuous stirred tank electrochemical reactor (CSTER) using aluminum electrodes. Central composite design (CCD) was applied for designing th...
Autori: Poonam Kumari
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=28011

This paper analyzes the fundamental principles of the substitution of strip coal pillars with coal refuse through the combination of theoretical analysis, physical simulation and numerical calculation with engineering practice. We propose to lay out roadways through strip coal pillars in a reasonable manner so as to produce a “coal-rock bearing mass” consisting of stowboards (i.e., roadways backfilled with coal refuse) and coal pillars that substitute the original strip coal pilla...
Autori: Qiang-ling Yao
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=28014

The extent of the application of life cycle assessment (LCA) is not sufficient for the alternatives assessments performed in the industry in general and for the ecolabelling of the products/services. Given that the LCA is a widely-accepted methodology, the driving question behind this study was: “Is it possible to ecolabel each existing product/service in a case specific manner by using LCA results, so that the consumers would be able to know the extensive environmental impact of their ...
Autori: Semih Oguzcan
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=28016

Clinoptilolite (Clin), the most widely used natural zeolite in environmental applications, was used as soil additive to investigate its effectiveness in protecting and improving the quality of soils that received surface disposal of OMW, as well as in limiting nutrients leaching from the degraded soils. Clin was added in a batch experiment of 18 months, where OMW were added in evaporation ponds and on soil for a period of more than 12 years. The zeolite was added as dust (particle diameter &l...
Autori: Maria K. Doula
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=28018

The polyhydroxybutyrate (PHB) production by photoautotrophic cultures is a potential eco-sustainable process to produce bioplastics. The biosynthesis of PHB by cyanobacteria meets a twofold target: the use of CO2 as feedstock alternative to the fossil resource used in the conventional processes; the contribution to the reduction of the CO2 concentration in the atmosphere. This contribution reports results of a study regarding the optimal growth conditions for cyanobacteria to produce PHB unde...
Autori: Roberta Carpine
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=28021

Based on the dynamic panel data from 29 administrative regions in China over the period of 2003-2013, we applied GMM system method to the analysis of the relationship between financial development, economic growth and CO2 emissions. Empirical analysis indicates that economic growth is usually accompanied by higher CO2 emissions, while the increasing level of final development is associated with a reduction in CO2 emissions. Further analysis shows that the relationship between financial develo...
Autori: Shushu Li
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=28023

Groundwater recharge is an effective method to solve the groundwater overexploitation. In this study, the method of numerical simulation is used to discuss the environmental change of groundwater in the process of multi-source recharge. The results of multiple water sources including local regenerated water source, wetland water source and South-to-North water source show that the cumulative loss of groundwater resources in Mihuaishun area in 2007 ~ 2016 reaches -1.784 × 109 m3. The inf...
Autori: Dasheng Zhang
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=28024

This article addresses CO2 dynamics in school classrooms and analyses the improvement of ventilation and indoor air quality resulting from the simple window-opening ventilation strategies. CO2, temperature and relative humidity were measured in four different naturally ventilated classrooms of a Northeastern Portuguese education institution for a wide range of environmental conditions. Indoor CO2 levels were also simulated with a numerical model to help manage the indoor air quality of these ...
Autori: Filipe Rodrigues
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=28030

Aspergillus fumigatus has been selected to bioleach the metals ion from brown shale. Process parameters like pH (5.0, 5.5, 5.8, 6.0, and 6.5), substrate concentration (2, 4, 6, 8, and 10%), pulp density (1, 5, 10, 15, and 20%), temperature (30, 35, 40, 45, 50oC) and agitation (100, 150, 200, 250, 300 rpm) were optimized according to L25 Taguchi orthogonal experimental array design that resulted in the twenty five batch bio recovery experiments. After biorecovery experiments, optimum value of ...
Autori: Fozia Anjum
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=28035

In this research, optimization of Homogeneous Fenton process was performed using Multi-Criteria Decision Analysis (MCDA) and Taguchi method to remove Ciprofloxacin (CIP) from an aqueous phase. Analytic Hierarchy Process (AHP) is one of the most comprehensive systems designed for multi-criteria decision making. In this study, paired comparisons based on the AHP method were performed for three criteria including (i) CIP removal, (ii) COD removal and (iii) Sludge to iron ratio (SIR) to select th...
Autori: Marjan Salari
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=28040

Due to emissions from power station using fossil fuels, the decrease of existing pollution as well as of operational costs should be taken into consideration, when resolving environmental economic dispatch problems. In this research, we will evidence that nonlinear constraints of generating units, forbidden regions, and ramp-rate of generating units will reduce operational costs and environmental pollution, to achieve environmental economic dispatch effectiveness, by employing an improved mul...
Autori: Daqing Wu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=28045

To ensure that green growth are achieved and socially optimal, we develops an endogenous growth model featuring a directed technological innovation, environmental taxation and economic activity. Our model investigates the inner dynamic interactions of green growth. Then, a numerical analysis is presented to trace how the green growth will be achieved by the four parameters: the size of tax distortions, the rate of capital tax, the elasticity of pollution conversion and the cost of carbon abateme...
Autori: Yuzhe Zhao
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=28066

The embedment of circular economy principles in cities is an opportunity to reduce the urban waste production and resource consumption towards closed-loop systems. In particular, the adoption of circular economy strategies as regeneration, optimization, sharing and loops can overcome waste and inefficiencies of linear economy. This paper presents some circular economy practices bringing an integration of circular strategies at urban scale. This work was funded by the Research into Electrical Sys...
Autori: Francesca Cappellaro
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=28076

The paper offers information on the energy efficiency of the honey production in the mountainous area of Romania. The field research was carried out as a face-to-face interview in 2018, on a representative sample including 134 beekeepers. The main results of the analysis of the energy input–output are: input energy 754.9 MJ/hive, net energy -417.3 MJ/hive, efficient energy use 0.47 and specific energy 27.0 MJ/kg. From the total inputs, direct inputs and renewable inputs account for 38.1% a...
Autori: Radu-Adrian Moraru
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=28102

This manuscript presents the bicriteria optimization of a polygeneration system to be installed in a tertiary sector building, considering economic and environmental objective functions. Electricity, hot water, steam, and cooling demands were considered. The bicriteria problem considered the annual costs and the annual carbon footprint. Updated environmental information was obtained through the application of the Life Cycle Assessment methodology and implemented within a Mixed Integer Linear Pr...
Autori: Bruno Campos Teixeira de Carvalho
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=28103

The optimal pricing strategies and coordination contract of providers of low carbon tourism products and services (TCP) and an online travel agency (OTA) are discussed based on altruism preference of decision makers. A competition model is established to compare and analyze the revenue, pricing strategies and coordination conditions in Stackelberg game model. According to the study and comparison results, altruism preference can directly influence decision-makers' decisions and supply chain....
Autori: Xiaole Wan
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=28108

The bio-inspired algorithms are versatile approaches that can be applied to a variety of problems. However, their efficiency is influenced by a multitude of characteristics such as quality of final solution, consumed computational resources, diversity management, convergence, complexity of the problem being solved. Consequently, the issue of choosing the best approach for a particular problem is a difficult task. In this work, the performance of two bio-inspired algorithms, Differential Evolutio...
Autori: Elena Niculina Dragoi
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=28159

The goal of this paper is to contribute to environmental improvement. This goal has been achieved by the development of an algorithm that allows the optimization of fuel consumption and transport of combustion products. The paper considers the outlier – robust recursive algorithm. This algorithm is used for identification of multivariable ARMAX (Autoregressive Moving Average with Exogenous Variables) models. In this paper, we introduce pseudo-Huber loss function which is a continuous nonli...
Autori: Vojislav Filipovic
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=28167

In the present research, four meta-heuristic algorithms named Genetic Algorithm (GA), Gravitational Search Algorithm (GSA), Particle Swarm Optimization (PSO), and Artificial Bee Colony (ABC) have been used for optimal design of cascade spillway to minimize the construction cost. Usually, the traditional design methods such as Vittal and Porey (VP) method or experimental modeling are used to solve this problem leading to infeasible or near optimal solution. The main novelty of this paper is to...
Autori: Pedram Jazayeri
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=28195

A numerical simulation was conducted to investigate the combustion characteristics and effects of Hydrogen-Hydrogen Oxygen (HHO) addition on performance and NOx emission of a spark ignition (SI) biogas engine. At a given operating condition, indicative work cycle Wi increases with increase of HHO, CH4 concentrations and load rate; but it decreases with engine speed increase and reaches peak value as variation of equivalence ratio and advanced ignition timing. Combustion temperature T and NOx con...
Autori: Bui Van Ga
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=28204

The study is focused on creating magnetic mesoporous materials through the insertion of a nickel ferrite into the structure of kaolintype clay. Sol-gel auto-combustion method was employed to synthesize the materials, using glycine and tartaric acid as chelating/combustion agents. This is the first study on the combined effect of different fuel agents and of clay-to-ferrite molar ratio on the structural, textural, magnetic and adsorptive properties of nanocomposites. The value of the average por...
Autori: Stefana Cojocaru
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=28210

In mitigating occupational hazards, there is often a need to use administrative controls such as job rotation over a prolonged period until the hazards can be eliminated or mitigated to safe levels. This research develops a noise-safe job-rotation optimization model that accounts for learning, forgetting, and boredom effects. Our analysis focuses on the case of human-paced and labor-intensive operations, considering the trade-off between safety and productivity. A case of multi-skilled workers ...
Autori: Pavinee Rerkjirattikal
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=28256

Due to the environmental deterioration because of pollution and excessive consumption of natural resources, governments are driving efforts to limit pollution emissions and to encourage cleaner manufacturing. The most common interventions governments adopted are providing subsidy to green products and taxing non-green products. With the green consciousness improving gradually, consumers prefer to buy products based on greenness of products with price and quality level together. In order to inve...
Autori: Yitong Ma
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=28258

TDue to the environmental deterioration because of pollution and excessive consumption of natural resources, governments are driving efforts to limit pollution emissions and to encourage cleaner manufacturing. The most common interventions governments adopted are providing subsidy to green products and taxing non-green products. With the green consciousness improving gradually, consumers prefer to buy products based on greenness of products with price and quality level together. In order to i...
Autori: Yitong Ma
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=28259

Based on the carbon dioxide emission-dependent market represented by the traditional energy, electricity, petroleum and chemical industries, this paper studies the optimal price and competitive decision in the duopoly competition market under the constraints of three carbon emission reduction policies: carbon cap, carbon cap-and-trade and carbon tax, and verifies the relevant conclusions through numerical analysis. The results show that because of the competition between the two oligarchic mark...
Autori: He Hua
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=28272

MABR (Membrane Aerated Biofilm Reactor) consists in an attached-growth process in which a gas permeable membrane is used as a biofilm carrier, and bubble-less oxygen transfer allows for a counter-diffusional mechanism where the electron donor (NH4+, biodegradable organics) and electron acceptor (O2) reach the biofilm from opposing sides. The paper reports results form the largest MABR installation in the world, demonstrating the beneficial impact of the technology in terms of improved process r...
Autori: Giuseppe Guglielmi
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=28299

This study shows the results of the experimental investigation of refinery wastewater treatment by the electro-Fenton process. The experiments were designed using Taguchi design approach with an orthogonal array (OA) of L16 runs. Four process variables (current density (CD), temperature (T), Fe2+ concentration (Fe2+), and time (t)) at four different levels were considered for the present design. Regression analysis was performed to predict a correlation for the response function (chemical oxyge...
Autori: Zainab I. Abbas
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=28322

Road dust from atmospheric deposition is considered as one of the significant environmental pollutants for containing toxic heavy metals. In this connection, to explore the present scenario of urban contamination and potential health risk of heavy metals present in road dust; this study was carried out in Tangail Municipality Area of Bangladesh. Road dust samples were collected seasonally from five different sampling sites encompassing different traffic homogeneity. Collected samples were proces...
Autori: Mir Talas Mahammad Diganta
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=28334

Optimal evacuation routes are crucial to protect workers’ safety when accidental leakage of toxic gas occurs in chemical plants. However, the majority of route optimization focuses on the transport field and few on the evacuation routing optimization in chemical plants. This paper proposes a dynamic evacuation routing optimization method for chemical plants under toxic gas release scenarios. From the complete accident scenario set (CASS) built with wind fields and leakage sources, the leak...
Autori: Ying Liu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=28336

Water treatment has been extensively studied; however, only a few studies have considered it in isolated sites that do not have electric supply, which is a major inconvenience for inhabitants of rural areas. In this paper, the aim was to develop and implement a photovoltaic generator (PVG) that powers a pumping system, and water treatment with ozone. First, the PVG panel’s orientation was optimized using response surface modelling to identify the optimum operating orientation angles. Then,...
Autori: Mohammed Nadjib Brahami
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=28341

The simple way to deal with obnoxious hexavalent chromium is to reduce it to its trivalent form, which is comparatively less toxic. In this article, Cr(VI) was reduced to Cr(III) using hydrazine. The effect of various process parameters such as molar ratios of Cr(VI) to N2H4, the temperature of the reaction, and the environmental chemistry of solution on the reduction kinetics have been evaluated. Experiments demonstrate an order of three for the reaction. The reaction was first order with resp...
Autori: Bharti Verma
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=28348