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Rezultatele pentru airlift bioreactorRezultate gasite: 54
Environmental Engineering and Management Journal, Vol. 6 Nr. 2
Environmental Engineering and Management Journal › Vol. 6 › Nr. 2 Include urmatoarele articoleâ€? Degradation of alcian blue 8 gx by heterogeneous and homogeneous photocatalytic processesâ€? Evaluating the performance of solid waste management modelsâ€? Bioreactors with stirred bed of immobilized cells 1. Studies on mixing efficiencyâ€? Fugitive emissions estimation from petroleum storage tanksâ€? New Ni(II) coordination polymers with insulating and anticorrosive propertiesâ€? Determination of water quality deterioration at pilgrimage centre along river netrav... Autori: ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=25196
Bioreactors with stirred bed of immobilized cells 1. Studies on mixing efficiency
Environmental Engineering and Management Journal › Vol. 6 › Nr. 2 The models describing the flow or the heat and mass transfer in stirred bioreactors can be easily adapted for the continuous phase from the stirred bed bioreactors. But, for the immobilized biocatalyst phase, new models have to be established. Therefore, in this paper the influences of the main factors on mixing for a bioreactor with stirred bed of S. cerevisiae immobilized cells in alginate have been analyzed.. The mixing efficiency continuously increases with rotation speed acceleration for th... Autori: Anca-Irina Galaction, Anca-Marcela Lupasteanu, Dan Caşcaval ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=25116
Environmental Engineering and Management Journal, Vol. 3 Nr. 2
Environmental Engineering and Management Journal › Vol. 3 › Nr. 2 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
Environmental Engineering and Management Journal, Vol. 4 Nr. 2
Environmental Engineering and Management Journal › Vol. 4 › Nr. 2 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
Environmental Engineering and Management Journal, Vol. 7 Nr. 3
Environmental Engineering and Management Journal › Vol. 7 › Nr. 3 Include urmatoarele articole:â€? Cost sensitivity analysis by Monte Carlo simulationâ€? Mathematical modeling of gas drying by adsorptionâ€? Methyl isobutyl ketone combustion over Pt/Al2O3 catalystâ€? Distribution of oxygen transfer rate in stirred bioreactors with simulated brothsâ€? Unsteady heat transfer inside an elliptic cylinderâ€? Triphasic external-loop airlift reactors. Hydrodynamic and dispersion studiesâ€? Sustainable combined utilization of renewable forest resources and coal in Roma... Autori: ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=25209
Triphasic external-loop airlift reactors. Hydrodynamic and dispersion studies
Environmental Engineering and Management Journal › Vol. 7 › Nr. 3 AbstractConsidering that three-phase dispersions are common in chemical engineering and biotechnology, and with increasing airlift reactor applications to chemical and biotechnological processes, a experimental study was undertaken in order to investigate the liquid phase hydrodynamics and dispersion in an external-loop airlift reactor on laboratory scale. Experiments were conducted in order to find a relationship between relevant hydrodynamic and mixing parameters of a solidsuspended exter... Autori: Florina Ungureanu, Maria Gavrilescu, Radu Z. Tudose ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=25268
Distribution of oxygen transfer rate in stirred bioreactors with simulated broths
Environmental Engineering and Management Journal › Vol. 7 › Nr. 3 AbstractThe study on distribution of oxygen transfer rate for a stirred bioreactor and simulated broths was carried out for four positions inside the broth and indicated the significant variation of kla on the bioreactor height. For all considered positions, kla initially increased to a maximum value with mixing intensification, decreasing then, as the result of the modification of mixing mechanism in presence of air bubbles. The increase of broth viscosity led to the significantly reducing of o... Autori: Adina Segneanu, Anca-Irina Galaction, Dan Caşcaval, Radu Z. Tudose ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=25270
Environmental Engineering and Management Journal, Vol. 9 Nr. 2
Environmental Engineering and Management Journal › Vol. 9 › Nr. 2 - 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
Analysis of distribution of oxygen transfer rate in stirred bioreactors for bacterial broths
Environmental Engineering and Management Journal › Vol. 8 › Nr. 1 AbstractThe study on the distribution of oxygen transfer rate in a stirred bioreactor for Propionibacterium shermanii broths underlined the major influence of the presence and concentration of biomass on the interphasic transfer of oxygen. Owing to the bubbles surface blockage by the bacterial cells, the accumulation of biomass from 30.5 to 120.5 g/l d.w. led to the decreasing of kla for about 1.3- 2.4 times. Compared with the simulated broths without biomass having similar apparent viscosity, t... Autori: Adina Segneanu, Anca-Irina Galaction, Dan Caşcaval ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=25364
Environmental Engineering and Management Journal, Vol. 8 Nr. 1
Environmental Engineering and Management Journal › Vol. 8 › Nr. 1 Include urmatoarele articole:â€? CsHSO4/mesoporous silica composites - new electrolytes for solid acid fuel cellsâ€? Trend in exhaust emissions from in-use gasoline vehiclesâ€? Analysis of distribution of oxygen transfer rate in stirred bioreactors for bacterial brothsâ€? Electrochemical characteristics of Ti6Al7Nb alloy in Ringer's solutionâ€? Pulsed high voltage discharge technology as a new method for killing Hepatitis C virus (HCV) cellsâ€? Hydrodynamic modelling of pollution with LNAPL gene... Autori: ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=25367
Environmental Engineering and Management Journal, Vol. 8 Nr. 2
Environmental Engineering and Management Journal › Vol. 8 › Nr. 2 Include urmatoarele articole:â€? Environmental Engineering and Management Journal, Vol. 8 Nr. 2â€? Bioengineering aspects of tissues culture bioreactors for medicine and environmental applicationsâ€? Removal of bis (1-chloro-2-propyl) ether from wastewater using sonodegradation and biodegradationâ€? A novel plasma reactor for toluene decomposition in contaminated air flowâ€? Study of the copper (II) removal from aqueous solutions by chelating resin Purolite S930 â€? Analysis of some metal levels... Autori: ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=25371
Removal of bis (1-chloro-2-propyl) ether from wastewater using sonodegradation and biodegradation
Environmental Engineering and Management Journal › Vol. 8 › Nr. 2 Abstract
The potential of using ultrasonic irradiation and microbiological treatment for the removal bis(1-chloro-2-propyl) ether from aqueous solutions has been investigated. Experiments were performed in a continuous bioreactor, 3500 mL volume, and in an ultrasonic bath respectively, using frequencies of 38+1kHz and applying a power of 30 W. Under these conditions, the sonochemical conversion of ether was found to be superior to the biological one. The ultrasound method was improved by air ... Autori: Mihaela Iordache, Vasile Lucian Pavel, Lim Myunghee, Ioan Iordache ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=25403
Bioengineering aspects of tissues culture bioreactors for medicine and environmental applications
Environmental Engineering and Management Journal › Vol. 8 › Nr. 2 Abstract
Development of industrial cell culture processes needs a good engineering practice and system expertise in achieving a successful integrated process using disposable components. The bioreactors for 3D tissues systems could be an advantageous alternative in terms of low contamination risk, easiness of handling and scaling-up. A careful and strategic design of these equipments provides a better process control and a safe and reproducible production of tissue construct. They can offer t... Autori: Anca-Irina Galaction, Dan Caşcaval, Dan Zaharia, Radu Ciorap ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=25404
Bioremediation of contaminated air using a bioscrubber
Environmental Engineering and Management Journal › Vol. 8 › Nr. 3 Abstract
This study examined the effect of hexane concentration in the inlet gas stream on the treatment performance of a concentric tube internal loop airlift bioreactor with a 7 L capacity, inoculated with a strain of Pseudomonas aeruginosa. The experiments were conducted employing hexane-contaminated air, in 0.62, 1.26, 2.15 and 4.5 g/m3 concentrations at 29 ± 1°C. The 100% hydrocarbon removal was verified when effluents containing 0.62 and 1.26 g/m3 of hexane were employed. Under contin... Autori: Fernando Jorge Santos Oliveira, Leonardo Vazquez, Francisca Pessoa de Franca ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=25437
Analysis of distribution of oxygen transfer rate in stirred bioreactors for fungus broths 1. Suspensions of P. Chrysogenum free mycelia
Environmental Engineering and Management Journal › Vol. 9 › Nr. 2 Abstract
Unlike the P. shermanii and S. cerevisiae cultures, the study on the distribution of oxygen transfer in stirred bioreactor for P. chrysogenum free mycelia broths indicated that this process is controlled mainly by the high apparent viscosity of broths, and less by the presence of fungus biomass. For this reason, the influence of fungus accumulation on the reduction of kla is attenuated compared with that obtained for bacterial or yeasts broths. The lower influence of fungus biomass i... Autori: Anca-Irina Galaction, Dan Caşcaval, Marius Turnea, Stefanica Camarut ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=25606
Environmental Engineering and Management Journal, Vol. 9 Nr. 5
Environmental Engineering and Management Journal › Vol. 9 › Nr. 5 ? SUSTAINABLE CONCRETE HARDENING PROCESSES IN NORMAL CLIMATIC AND THERMAL TREATMENT CONDITIONS
? THE ENVIRONMENTAL DIMENSION ? AN INTERDISCIPLINARY RESEARCH AREA
? MENU PLANNING STRATEGY BASED ON ECOLOGICAL FOOTPRINT
? EVALUATING ENVIRONMENTAL IMPACT OF NIGERIAN COMPOSTED WASTES USING LABORATORY EXTRACTION TEST
? IN SITU RADIOFREQUENCY FIELD LEVEL ASSESSMENT IN TWO URBAN AREAS IN ROMANIA: OPEN QUESTIONS TO ELECTROMAGNETIC POLLUTION
? INNOVATIVE SOLUTION FOR WARNING ON HI... Autori: ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=25657
Environmental Engineering and Management Journal, Vol. 10 Nr. 5
Environmental Engineering and Management Journal › Vol. 10 › Nr. 5 ? 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
Environmental Engineering and Management Journal, Vol. 10 Nr. 3
Environmental Engineering and Management Journal › Vol. 10 › Nr. 3 ? 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
RESEARCH OF MEMBRANE FOULING PERFORMANCE IN A SUBMERGED DOUBLE-SHAFT ROTARY ANAEROBIC MEMBRANE BIOREACTOR
Environmental Engineering and Management Journal › Vol. 10 › Nr. 7 Considering the membrane fouling problem in submerged anaerobic membrane bioreactors, a set of submerged double-shaft rotary anaerobic membrane bioreactor (SDRAnMBR) was constructed by applying a double-shaft rotary module to submerged anaerobic bioreactor, and the theoretic analysis of the characteristics of hydraulics dynamics in SDRAnMBR has been performed. The membrane fouling performance for treatment of synthetic brewery wastewater was investigated by SDRAnMBR. The results of a theoretical... Autori: Ling Bai, Chao Liu, Weiguang Lanhttp://www.ecozone.ro/reviste.php?RID=25694
PERFORMANCE OF MEMBRANE BIOREACTOR (MBR) PROCESS TREATING WASTEWATER CONTAINING DIFFERENT CONTENT OF SEAWATER
Environmental Engineering and Management Journal › Vol. 10 › Nr. 7 A submerged membrane bioreactor (MBR) was employed to treat wastewater containing different content of seawater in this work. During the process, the operating conditions were as follows: COD was 800-1000 mg/L, ammonium-N was 80-100 mg/L, pH was 7.5-8.5, mixed liquor suspended solids (MLSS) was around 7000 mg/L, dissolved oxygen (DO) was 2-4 mg/L. The results showed that the ammonium-N removal was better than COD removal. Sludge settling property was good in saline wastewater treatment, and the ... Autori: Jin Li, Deshuang Yu, Dan Wanghttp://www.ecozone.ro/reviste.php?RID=25697
INFLUENCE OF FERRIC IRON CONTENT ON THE TREATMENT EFFICIENCY OF PRINTING AND DYEING WASTEWATER
Environmental Engineering and Management Journal › Vol. 10 › Nr. 7 Adding ferric or bio-ferric agent is method to improve membrane fouling and prolong membrane life.This paper analyses the influence of ferric content on treatment effect of printing and dyeing wastewater, through examining the change of COD and dyestuff content in supernatant with the change of ferric content in sludge and in supernatant. COD in supernatant is reduced with increase of ferric content in sludge, and the dyestuff content in supernatant is reversed, which might be due to the adsorpt... Autori: Shifeng Ji, Chunmei Gao, Hong Yang, Ming Chu, Chunfeng Wanghttp://www.ecozone.ro/reviste.php?RID=25711
TREATMENT OF AN ALKALINE BUTYL RUBBER WASTEWATER BY THE PROCESS OF COAGULATION AND FLOCCULATION - HYDROLYSIS ACIDIFICATION - BIOLOGICAL CONTACT OXIDATION - MBR
Environmental Engineering and Management Journal › Vol. 12 › Nr. 7 AbstractWastewater from butyl rubber production is causing an increasing environmental problem due to its large quantity and complexquality. In this paper, two types of wastewaters generated from rubber synthesis, i.e. alkaline wastewater (AW) and cleaning andflushing wastewater (CFW), were investigated. Coagulation and flocculation were firstly applied to remove suspended solids(SS) from the AW. By single factor experiment, the optimum operational conditions were obtained as pH 8, PAC dosage 40... Autori: Lujun Chen, Rui Liu, Wei Li, Wei Zheng, Yan Zhang, Ying Li ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=25950
EDITORIAL - A SPECIAL ISSUE DEDICATED TO ENVIRONMENTAL RESEARCH AND TECHNOLOGY ECOIMPULS 2012 INTERNATIONAL CONFERENCE, October 25-26, Timisoara, Romania
Environmental Engineering and Management Journal › Vol. 12 › Nr. 5 The first edition of the International Conference„ECOIMPULS 2012- Environmental Research andTechnology” plans to open a conference seriesdedicated exclusively environmental issues. Thescientific topics are devoted to the on-going research onenvironmental topics regarding: „Environment – apolitical, economic and social responsibility”,„Water in a changing world”, „ZERO – waste cities”and „ Energy – beyond the conventional”.This scientific event aims to bring togetherprofessionals, academics, scie... Autori: ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=26015
UTILIZATION OF OLIVE OIL AS A POTENTIAL OXYGEN-VECTOR IN STIRRED BIOREACTORS
Environmental Engineering and Management Journal › Vol. 12 › Nr. 3 AbstractA new approach to environmental protection management is the aerobic microbial digestion of food industry wastewaters byusing those waters as substrate, while the pollutants contained work also as oxygen-vectors. In biotechnology, oxygen masstransfer is a key parameter involved in the design and operation of mixing–sparging bioreactors and it can be analyzed by meansof the oxygen mass transfer coefficient (kLa). The influence of a second liquid phase with higher oxygen affinity (in this ... Autori: Elena Folescu ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=26097
GREEN TECHNOLOGY FOR 6-AMINOPENICILLANIC ACID PRODUCTION - STUDY OF PENICILLIN G HYDROLYSIS IN A BIOREACTOR WITH MOBILE BED OF IMMOBILIZED PENICILLIN AMIDASE UNDER SUBSTRATE INHIBITION
Environmental Engineering and Management Journal › Vol. 12 › Nr. 11 AbstractThe efficiency of enzymatic hydrolysis of Penicillin G to 6-Aminopenicillanic acid under substrate inhibition has been analyzedfor a bioreactor with mobile bed of immobilized penicillin amidase. The results indicated that the optimum values of temperatureand pH remained the same as for homogeneous hydrolysis using free enzyme. The inhibitory effect induced at higher PenicillinG amount in liquid phase was attenuated by increasing the size of the biocatalyst particles. For this reason, at ... Autori: Ramona Mihaela Matran ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=26224
EXPERIMENTAL INVESTIGATION AND CFD SIMULATION OF THE HYDRODYNAMIC AND MASS TRANSFER CHARACTERISTICS IN A SPLIT-CYLINDER AIRLIFT REACTOR CONTAINING PETROLEUM-WATER MICRO-EMULSIONS
Environmental Engineering and Management Journal › Vol. 12 › Nr.12 AbstractIn this article, hydrodynamic parameters and overall Oxygen mass transfer coefficient of petroleum based micro-emulsions in anairlift reactor were investigated. Four different petroleum-in-water micro-emulsion systems containing kerosene, heavy naphtha,light naphtha and diesel as oil based were used with concentrations of 3% and 7 % (v/v). The experimental data were supportedby simulation results obtained from the Computational Fluid Dynamics (CFD) method. The CFD was properly able to si... Autori: Mostafa Keshavarz Moraveji ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=26234
REMOVAL OF DYE AND CHEMICAL OXYGEN DEMAND (COD) REDUCTION FROM TEXTILE INDUSTRIAL WASTEWATER USING HYBRID BIOREACTORS
Environmental Engineering and Management Journal › Vol. 13 › Nr. 1 AbstractA bench-scale anaerobic bioreactor for the anaerobic treatment of textile wastewater using anaerobic sludge was experimented.The Top and bottom of hybrid bioreactor were functioned with UAF (Up Flow Anaerobic Filter) and UASB (Up Flow AnaerobicSludge Blanket), respectively. The effect of organic loading rate (OLR) and hydraulic retention time (HRT) on treatment oforganic matters in the textile wastewater was investigated. The maximum removal of chemical oxygen demand (COD) and colorwas 9... Autori: Reza Katal ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=26255
BIODEGRADATION OF THE HERBICIDE LINURON IN A PLUG-FLOW PACKED-BED BIOFILM CHANNEL EQUIPPED WITH TOP AERATION MODULES
Environmental Engineering and Management Journal › Vol. 13 › Nr. 8 AbstractA lab-scale packed-bed biofilm channel reactor that operates as a plug-flow system equipped with top aeration modules wasconstructed and evaluated. To assess the reactor performance a microbial community able to degrade linuron was used. Changingthe fluid flow rates and the linuron concentrations in the inflowing medium the volumetric loading rates of linuron (BV,L) weregradually increased from 0.29 to 14.93 mg/Lh. During the operation of the reactor, an airflow rate of 0.15 ± 0.05 L/min... Autori: Erick Marrón-Montiel ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=26465
LANDFILL LEACHATE RECIRCULATION. PART I: SOLID WASTE DEGRADATION AND BIOGAS PRODUCTION
Environmental Engineering and Management Journal › Vol. 13 › Nr. 10 AbstractAnaerobic degradation (AD) of municipal solid waste (MSW) depends on the moisture and nutrient distribution within thebioreactor; these factors are affected by leachate recirculation. In this work, the effects of leachate recirculation of 15 to 120 byvolume percentage (%V) on AD were studied. The ojectives of this study are as follows: a) to determine which recirculation rateprovides the best conditions for accelerated anaerobic degradation (AD) and b) to determine the optimal range of r... Autori: Maria del Consuelo Hernández-Berriel ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=26557
APPLICATIONS OF PNEUMATIC BIOREACTORS IN WASTEWATERS TREATMENT 1. MIXING EFFICIENCY AND DISTRIBUTION IN SPLIT-CYLINDER GAS-LIFT BIOREACTOR FOR VISCOUS MEDIA
Environmental Engineering and Management Journal › Vol. 13 › Nr. 10 AbstractThe distribution of mixing time for a split-cylinder gas-lift bioreactor has been investigated for simulated broths with apparentviscosities up to 26 cP. The results indicated important variation of mixing time on the height of riser or downcomer, as well asdifferent behavior of dispersion flows in the two regions. Thus, the highest mixing efficiency for the ascending circulation hasbeen recorded for the intermediary positions, placed above the sparger. Contrary, for the downcomer, the i... Autori: Anca-Irina Galaction ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=26560
DISTRIBUTION OF OXYGEN TRANSFER RATES IN STIRRED BIOREACTOR FOR DIFFERENT FERMENTATION BROTHS - OXYGEN-VECTOR DISPERSIONS
Environmental Engineering and Management Journal › Vol. 14 › Nr. 2 Abstract
The oxygen transfer into the fermentation broths could be improved in presence of oxygen-vectors, without intensification of
mixing or aeration. The experimental results for simulated, P. shermanii and S. cerevisiae broths indicated the significant
increase of kLa, by adding n-dodecane, but the magnitude of this effect depends especially on the cells affinity for hydrocarbon
droplets. Therefore, due to the higher affinity of yeasts cells for hydrocarbon droplets during their entire ... Autori: Anca Irina Galaction ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=26657
OPTIMIZATION OF ISES FOR SIMULTANEOUS NH4 +, NO3 - AND NO2 - MONITORING IN SYNTHETIC WASTEWATER USING SOLVER
Environmental Engineering and Management Journal › Vol. 14 › Nr. 3 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
LIQUID INJECTION TO ENHANCE BIOGAS PRODUCTION IN LANDFILLS FOR PRETREATED MUNICIPAL SOLID WASTES - BIO.LEA.R. PROJECT (LIFE+ PROGRAM)
Environmental Engineering and Management Journal › Vol. 14 › Nr. 7 Abstract
The Bio.Lea.R project aims to demonstrate the performance of a landfill for less reactive, biologically treated waste (pretreated
organic wastes) compared to a conventionally managed landfill, with regard to both environmental (biogas and leachate
production) and economic aspects. The objective is to control the pretreated biodegradable waste through a liquid injection in
order to achieve the same biogas quantity in a shorter time than in conventional landfill.
Laboratory and full ... Autori: Alberto Godio ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=26784
REUSE OF TREATED MUNICIPAL WASTEWATER FOR IRRIGATION IN APULIA REGION: THE “IN.TE.R.R.A.” PROJECT
Environmental Engineering and Management Journal › Vol. 14 › Nr. 7 Abstract
The use of non-conventional water resources including treated municipal wastewater has been increasing in the Mediterranean
regions over the last decades to cope with water shortages and uneven rainfalls due to climate change.
The aim of this paper is to present the first results from two years of experimental field activities carried out in two different
demo-places in Southern Italy: the municipal wastewater treatment plants of Noci and Castellana Grotte (Apulia region). In these
... Autori: Antonio Lonigro ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=26787
TREATMENT OF MATURE LANDFILL LEACHATE BY USING COMBINED ARB PROCESS AND SULFATE RADICAL OXIDATION
Environmental Engineering and Management Journal › Vol. 14 › Nr. 8 Abstract
Treatment experiments for mature landfill leachate were conducted by using combined aged refuse bioreactor (ARB) process and
sulfate radical oxidation. In the ARB process, the effects of wet/dry ratios, hydraulic loading, and influent introduction time on
contaminant removal were investigated. In the oxidation process, Na2S2O8 was activated by heat to generate powerful oxidants,
such as sulfate radicals, to oxide residual contaminants in the effluent. The removal of chemical oxygen ... Autori: Zhanmeng Liu ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=26818
POPULATION ANALYSIS IN HIGH-NITRATE WASTEWATER TREATMENT IN SEQUENCING BATCH REACTORS
Environmental Engineering and Management Journal › Vol. 15 › Nr. 1 The pickling liquor used in the stainless steel manufacturing process is a mixture of nitric and hydrofluoric acid which generates
wastewater with nitrate concentrations ranging between 500 and 6000 mgNO3--N/L. In the present study, laboratory-scale anoxic
Sequencing Batch Reactors (SBRs) were used to treat high nitrate wastewaters. Two different sludge inocula were tested: one
from a Municipal Solid Waste Leachate Treatment Plant (LTP), and the other from a Sewage Treatment Plant (STP). Meth... Autori: Ana Isabel Pelaez ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=26933
IMPROVING THE NUTRITIONAL QUALITY OF FODDER YEASTS BY ADDING MINERALS
Environmental Engineering and Management Journal › Vol. 15 › Nr. 5 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
TREATMENT OF DIGESTED PIGGERY WASTEWATER WITH A MEMBRANE BIOREACTOR
Environmental Engineering and Management Journal › Vol. 15 › Nr. 10 A submerged membrane bioreactor (MBR) was applied to treat digested piggery wastewater (DPW). The removal of chemical
oxygen demand (COD), ammonium-nitrogen (NH4-N), two kinds of heavy metals and ten kinds of antibiotics were studied. The
hydraulic retention time (HRT) was gradually shortened from 12 days to 2.7 days, by which correspondingly the volumetric
COD loading rate was increased from 0.4±0.1 to 2.8±0.6 kg /(m3·d) and volumetric NH4-N loading rate was increased fr... Autori: Rui Liu ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=27150
ION-EXCHANGE MECHANISM IN BIOSORPTION OF Pb2+ IONS FROM CONTAMINATED WATER BY BANANA STALK WASTE
Environmental Engineering and Management Journal › Vol. 15 › Nr. 12 Banana stalk (BS) waste is used to remove Pb2+ from aqueous solution. Equilibrium data were analyzed with Langmuir and Freundlich adsorption models, which fit better in the former equation. The qmax (maximum metal uptake capacity) for Pb2+ adsorption was 105.14 mg/g of BS at pH 5.0, which followed pseudo-second order kinetics model. IR spectra confirmed the participation of hydroxyl, amino, and acidic functional moieties in the removal of Pb2+. The major mechanism involved in the biosorption of ... Autori: Kashif Iqbal Sahibzada ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=27214
KINETIC CONSTANTS DETERMINATION OF PETROLEUM REFINERY EFFLUENT TREATMENT IN A UASB REACTOR USING RSM
Environmental Engineering and Management Journal › Vol. 16 › Nr. 1 In this study, an upflow anaerobic sludge blanket (UASB) bioreactor at the mesophilic temperature (38ºC) was successfully used for the treatment of petroleum refinery effluents. Response surface methodology (RSM) was applied for the design and analysis of experiments to predict the behavior of the initial COD and the hydraulic retention time (HRT) in the bioreactor. A statistical analysis indicated that the models adequately represented the experimental data. At the optimal conditions, the ... Autori: Seyed Omid Rastegar ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=27233
MECHANICAL-BIOLOGICAL TREATMENT OF MUNICIPAL SOLID WASTE IN POLAND - CASE STUDIES
Environmental Engineering and Management Journal › Vol. 16 › Nr. 2 After the entry into force of Landfill Directive 1999/31/EC the member states of European Union (EU) turned towards other technologies for waste treatment and management, such as mechanical-biological treatment of waste (MBT) in order to meet the obligations related to the reduction of the amount of landfilled biodegradable waste. This paper presents an analysis of the waste management in Poland in terms of the current regulations and requirements of the EU and achievement of the mechanical - bi... Autori: Monika Suchowska-Kisielewicz ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=27266
BIOCONVERSION OF POTATO WASTEWATER TO ALCOHOL
Environmental Engineering and Management Journal › Vol. 16 › Nr. 3 This research offers a novel approach for potato wastewater (PW) bioconversion to alcohol by microwaves gelatinization, liquefaction and simultaneous saccharification and fermentation (SSF). Concentrated PW from potato processing to obtain fries was treated by gelatinization, enzymatic hydrolysis through liquefaction and saccharification, and fermentation; a mini-bioreactor was used, with low oxygen, temperature, pH and mixing control. The yeast Saccharomyces cerevisiae and a commercial mix of l... Autori: Maria Iasmina Moza ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=27275
OPTIMIZATION OF OPERATIONAL CONDITIONS FOR NITRITE ACCUMULATION IN A SUBMERGED BIOFILTER
Environmental Engineering and Management Journal › Vol. 16 › Nr. 10 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
TREATMENT OF WASTEWATER WITH A HIGH C/N RATIO IN SEQUENCING BATCH BIOREACTOR (SBBR) CONTAINING BIOCARRIER
Environmental Engineering and Management Journal › Vol. 16 › Nr. 11 Wastewater treatment using sequencing batch reactor (SBR) has certain advantages over conventional activated sludge system. The performance of sequencing batch reactor in treating high C/N ratio was investigated with suspended polyurethane and polystyrene attached growth biomass configuration. A sequence of 4 hr HRT, 0.3 month SRT and 1kg COD/m3 was employed to study treatment efficacy. Treatment performance was assessed by means of chemical oxygen demand (COD), total nitrogen (TN) and total pho... Autori: Beenish Saba ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=27478
GAS HOLD UP IN THE CULTIVATION OF A PETROLEUM-DEGRADING BACTERIAL CONSORTIUM
Environmental Engineering and Management Journal › Vol. 17 › Nr. 5 The hydrodynamic behavior of bubble column bioreactors (BCB) is strongly dependent on the bubbly flow regime. Therefore, the influence of superficial gas velocity (Ug) and Sauter mean diameter (d32) on gas hold up (εg) was evaluated for the cultivation of a petroleum-degrading consortium. Hydrodynamic parameters were determined by photographic techniques. Also, the biomass cultivation was quantified by suspended solids formation (SS). Our findings indicated that the d32 increased at high... Autori: Olivia Tzintzun-Camacho ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=27597
INTEGRATED USE OF TWO MICROALGAL SPECIES FOR THE TREATMENT OF AQUACULTURE EFFLUENT AND BIOMASS PRODUCTION
Environmental Engineering and Management Journal › Vol. 17 › Nr. 7 One of the main challenges for the development of biomass algal system production is the high operational and capital costs for these technologies. A great opportunity to overcome these challenges may however exist in the integration of wastewater treatment with algal biomass production. The algae are used for treatment of industrial wastewater, for purification of effluent originating from livestock production, while the studies concerning the use of algae species for the treatment of aquacultu... Autori: Katya Velichkova ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=27684
Environmental engineering and Management Journal No. 8
› Vol. 1 › Nr. 8 • 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
STATISTICAL EVALUATION AND PROCESS OPTIMIZATION OF BIOTREATMENT OF POLYCYCLIC AROMATIC HYDROCARBONS IN A BIOREACTOR
Environmental Engineering and Management Journal › Vol. 17 › Nr. 8 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
Environmental engineering and Management Journal No. 8
› Vol. 1 › Nr. 4 • 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
Environmental engineering and Management Journal No. 8
› Vol. 1 › Nr. 4 • 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
MULTI-OBJECTIVE ANALYSIS FOR THE SELECTION OF A SUSTAINABLE GREYWATER TREATMENT SYSTEM
Environmental Engineering and Management Journal › Vol. 18 › Nr. 1 Greywater reuse is widely accepted as a suitable response to the increasing demand of fresh water in urban areas. On the other
hand, strict environmental regulations have obligated the development and implementation of membrane separation technologies
for production of municipal potable water, in industrial water supply and in wastewater treatment. Potential energy crisis in the
future has highlighted the importance of using renewable source of energy for membrane separation processes. This r... Autori: Mohammad Ramezanianpour ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=27889
PHOTOAUTOTROPHIC PRODUCTION OF POLY-Β-HYDROXYBUTYRATE (PHB) FROM CYANOBACTERIA: NITRATE EFFECTS AND SCREENING OF STRAINS
Environmental Engineering and Management Journal › Vol. 18 › Nr. 6 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
LIGHT INTENSITIES MAXIMIZING PHOTOSYNTHESIS AND KINETICS OF PHOTOCHEMICAL STEPS IN Graesiella emersonii UNDER DIFFERENT CULTIVATION STRATEGIES
Environmental Engineering and Management Journal › Vol. 18 › Nr. 7 The aim of this paper is studying light intensity values which maximize the photosynthesis in microalgal cultures by means of
models of the photochemical process and by changing cultures strategies.
The photosynthetic performances of Graesiella emersonii under batch, fed-batch, semi-continuous cultivation modes and with only
air sparged or CO2 added to air were quantified by means of gas exchange measure and pulse amplitude modulated fluorimetry
(PAM); kinetics of the photochemical processes... Autori: Dora Allegra Carbone ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=28037
ENHANCEMENT OF BIOGAS PRODUCTION FROM FOOD WASTES IN A HYBRID ANAEROBIC–AEROBIC BIOREACTOR BY MANURE ADDITION AND LIME-PRETREATMENT OF RECYCLED LEACHATE
Environmental Engineering and Management Journal › Vol. 18 › Nr. 12 The production of food wastes is a serious issue in developed and developing countries. The biogas production technology is one of the most sustainable methods for treating food wastes. Currently, there is a great need to implement suitable methods to enhance biodegradation and methane production. This study investigated the effect of manure addition and leachate lime-pretreatment on the biogas and methane production from spoilable municipal solid wastes using a hybrid anaerobic-aerobic bioreact... Autori: Fatemeh Aliasgari ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=28123 |