Abstract
The 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 the
water/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 and at its
modelling by using the CFD (Computational Fluid Dynamics) technique in order to set up basic parameters for the design of
ozone contactors. The experimental data obtained, corroborated with the implementation of the numerical model, enabled the
rather accurate estimation of the mass transfer local coefficients at the gas/liquid interface, the results of the model application
being largely consistent with the experimental data obtained from the standpoint of the concentrations of ozone dissolved in the
system. In this context, the numerical model presented can be considered a useful instrument within the technological design
process for the systems of treating water with ozone, and also the departing point for approaching more complex systems.