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为阐明饮用水厂运行中主要消毒副产物的形成特征及转化规律,提出有效的控制措施,以北方某饮用水厂为研究对象,对采用预加氯的不同处理单元出水中3类消毒副产物,即8种卤乙酸(HAAs)、亚硝基二甲胺(NDMA)和4种三卤甲烷(THMs)的变化特征进行了研究。结果表明,经预氯化后3类副产物显著增加,HAAs、NDMA和THMs和质量浓度合计分别为33.1μg/L、9.0 ng/L和55.1μg/L;经双层滤料过滤后得到不同程度去除,5种可去除HAAs的去除率为15.7%～60.8%,NDMA去除率为48.1%,4种THMs的去除率为26.1%～49.2%。氯胺消毒下总出水中3类副产物含量也未明显增加,表明预氯化及氯胺消毒是进一步削减消毒副产物产生、降低饮用水健康安全风险的重要控制措施。
In order to clarify the forming characteristics and transformation rules of the main disinfection by-products in the operation of drinking water plants, effective control measures are proposed. Taking a drinking water plant in the north as the research object, three kinds of disinfection by-products , Namely the change characteristics of eight kinds of HAAs, NDMA and THMs. The results showed that the three kinds of by-products increased significantly after pre-chlorination, and the total contents of HAAs, NDMA and THMs and the mass concentrations were 33.1μg / L, 9.0 ng / L and 55.1μg / L, respectively. The removal rates of five kinds of removable HAAs were 15.7% ~ 60.8%, the removal rates of NDMA were 48.1% and the removal rates of four kinds of THMs were 26.1% ~ 49.2%. Chloramine disinfection of the total effluent in the three kinds of by-products did not significantly increase, indicating that pre-chlorination and chloramine disinfection is to further reduce the production of disinfection byproducts and reduce the health and safety of drinking water, an important risk control measures.