非均相催化臭氧处理高浓度制药废水的研究

非均相催化臭氧是一种对高浓度制药废水进行预处理的有效方法.本研究采用单一活性炭吸附、单一臭氧氧化和臭氧/活性炭联用3种体系对实际制药废水进行预处理，并对处理过程中的工艺参数进行优化.结果表明，相比单一活性炭吸附和单一臭氧降解体系，臭氧/活性炭联用体系能显著提高COD、TOC的去除率及BOD5/COD值，并显示出良好的协...

Heterogeneous catalytic ozone oxidationfor pharmaceutical wastewater treatment

Heterogeneous catalytic ozone oxidation was applied as an efficient way of pretreatment of highly concentrated pharmaceutical wastewater. The pretreatment of real pharmaceutical wastewater was compared in systems of ozonation alone and ozone/activated carbon. Compared with ozonation alone, the integrated process could greatly improve the removal efficiency of COD with an obvious synergistic effect. In the integrated process, COD removal could reach 72.6% under the conditions of pH 12, 20 g · L^-1 activated carbon and 64 mg · min^-1 ozone. The final TOC removal was 57.7% and BOD₅/COD 0.345, achieving effective biodegradation of pharmaceutical wastewater. The pH has an obvious influence on the removal of COD. The increase of pH inhibits adsorption by active carbon. Compared with acid conditions, a higher removal rate could be gained under alkaline conditions. The dosages of ozone and activated carbon also have marked effect on COD removal. Increasing their dosage obviously enhanced the removal efficiency of COD. A lumped kinetic model could be successfully applied to the pharmaceutical wastewater treatment. Through the analysis of pH_pzc SEM, BET and infrared spectra, the reaction mechanism was different under different pH conditions. Through analysis of kinetic model fits, we conclude that under the acid conditions, the major function of activated carbon is adsorption, while under basic conditions, the major function is to catalyze the ozonation.