臭氧氧化深度处理染料废水的探讨

Discussion on the Advanced Treatment of Dye Wastewater by Ozone Oxidation

采用臭氧氧化深度处理染料废水生化出的水，探讨了反应时间、初始pH和臭氧浓度对废水COD、氨氮去除的影响。结果表明：COD去除率随着反应时间、初始pH、臭氧浓度的增加而增加，当初始pH大于9时COD去除率增加不明显；氨氮去除率随着反应时间、初始pH、臭氧浓度的增加而增加，当臭氧 浓度大于20g／L时氨氮去除增加不明显。臭氧浓度30g／L、初始pH10、反应时间5h后COD去除率最高达69．5％，氨氮去除率最高达98．2％。

The effects of reaction time, initial pH and ozone oxidation on the removal rate of COD and ammonia nitrogen were discussed through adoption of advanced treatment of the biochemical wastewater from the dye wastewater by the ozone oxidation. The results showed that the removal rate of COD would increase with the increasing of the reaction time, initial pH and ozone concentration. The removal rate of COD wouldn＇t increase significantly if the initial pH value was more than 9. The removal rate of ammonia nitrogen would increase with the increasing of the reaction time, initial pH and ozone concentration. The removal rate of ammonia nitrogen wouldn＇t increase significantly if the ozone concentrate was more than 20 g/L. The removal of COD would achieve the highest level of 69.5% and the removal of ammonia nitrogen would achieve the highest level of 98.2% when the ozone concentration was 30 g/L, the initial pH value was 10 and the reaction time was 5 h.