氯胺消毒对卤乙酸类消毒副产物的控制研究

Research on control of disinfection by-products haloacetic acids in monoch loramine desinfection

对影响氯胺消毒副产物的因子进行了研究,结果表明:降低氯与氨氮的比值能够降低卤乙酸消毒副产物生成总量,当氯与氨氮比降至5:1时,氯胺消毒产生卤乙酸的总量比氯消毒能够减少69.1%;消毒副产物的生成量与氯胺的投加量呈很好的线性关系;延长接触时间对氯胺消毒副产物的生成量影响小;pH升高能够减少卤乙酸类消毒副产物的生成量;升高温度对卤乙酸生成量的影响很小。采用氯胺取代氯消毒能够很好控制卤乙酸类消毒副产物。

This thesis focuses on the factors which influence the production of haloacetic acids (HAAs) as by-product in monochloramine disinfection process. Results showed that the yield of HAAs decreased following the reduction of applied ratio of chlorine to ammonia in disinfection operation. The yield of HAAs decreased to 69.1 % when the ratio of chlorine to ammonia reduced to 5:1, and there is a good linear relationship between HAAs and monochloramine. Prolonging contact time has little effect on HAAs production, increasing temperature also has little effect on HAAs and increasing pH value could decrease HAAs. In a word, using monochloramine instead of chlorine can control HAAs very well.