Ozone mass transfer in water treatment: hydrodynamics and mass transfer modeling of ozone bubble columns

摘要

Most of the mathematical models that are employed to model the performance of bubble columns are based on the assumption that either plug flow or complete mixing conditions prevail in the liquid phase. Although due to the liquid-phase axial dispersion, the actual flow pattern in bubble columns is usually closer To being mixed flow rather than plug flow, but still not completely mixed flow. Therefore, the back flow cell Model (BFCM), that hypothesises both back flow and exchange flow to characterise the liquid-phase axial Dispersion, is presented as an alternative approach to describe the hydrodynamics ad mass transfer of Ozone bubble columns.