Modeling ozone mass transfer with combined effects of ozone decomposition and reaction with pollutants in a bubble column

This paper analyzes the countercurrent single-stage bubble column reactor ( BCR) for gas-liquid ozonation systems. The effects of system variables on o zonation performance are examined. The aspects of ozonation performance con sidered include the efficiency of ozone utilization, the efficiency of poll utant removal, and the emission concentration of ozone gas. This analysis t akes into account the effects of ozone decomposition and the ozonation of p ollutants on the ozone mass transfer (i. e., enhancement factror, E-r), the variation of pressure (P) and of gas velocity (U-G) along the column, and dispersion effects (Pe(G), Pe(L)). The obtained detailed single-stage BCR m odel may be used in further development of multi-stage BCR model in the fut ure. The results of this study can provide useful information for rational design of a BCR ozonation contactor, and are important with respect to the treatment of pollutants via ozonation. For the simplified case without ozon ation of pollutants, this analysis reduces to that of Huang et al. (1998).