再生水消毒副产物去除技术研究进展

Progress in Removal of Disinfection Byproducts from Reclaimed Water

三卤甲烷、卤乙酸、卤乙腈、三氯硝基甲烷以及N-亚硝基二甲胺是再生水氯/氯胺消毒中主要的消毒副产物,具有较强的毒性和致癌性,严重威胁生态安全及人体健康。目前难以通过改变消毒条件来减少其生成量,而去除其前驱物可有效降低消毒副产物的生成。文章介绍了氧化法、混凝沉淀法、离子交换法以及膜过滤等方法去除消毒副产物前驱物的研究,重点分析了臭氧氧化法去除消毒副产物前驱物的影响因素,对已生成的消毒副产物的去除也进行了简述。

Trihalomethane, haloacetic acid, haloacetonitrile, trlchloronitromethane and N-nitrosodimethylamine are the prominent disinfection byproducts （DBPs） during chlorination or chloramination of reclaimed water and therefore the public health and ecological security are seriously threatened due to their stronger toxicity and carcinogenicity. At present, it is difficult to reduce their generation quantity by changing the disinfection conditions, but removal of their precursors can effectively control the formation of DBPs. In this paper, pretreatment technologies for removal of the DBPs precursors are reviewed including oxidation, coagulation, ion exchange and membrane filtration, with focus on analysis of the influencing factors of ozonation for removal of the DBPs precursors. In addition, the method of eliminating the formed DBPs is also discussed.