以某水库微污染水源水为试验水样,比较了以超滤为核心的不同组合工艺的净水效果,考察了各组合工艺出水氯消毒对异养菌的灭活效果、持续消毒能力,研究了余氯的衰减、消毒副产物的生成以及对水质生物稳定的影响,从生物安全性和化学安全性两个方面对不同超滤组合工艺出水氯消毒安全性进行综合评价.结果表明,混凝沉淀-粉末活性炭-超滤组合工艺具有最佳的净水效果:该工艺能100％的去除水中的细菌总数、大肠杆菌；持续消毒能力强,72 h后水中余氯量为0.5 mg/L,对细菌总数、大肠杆菌的去除率仍为100％,且HPC小于100CFU/mL,符合生活饮用水卫生标准；消毒副产物的生成量控制在10 μg/L以下；出水AOC含量低于100 μgac-C/L,符合氯化消毒生物稳定性的要求.%Using a reservoir's micro-polluted water as the test water sample, compared the effects between different ultrafiltration combinations process, investigated chlorine disinfection effect on the inactivation of heterotrophic bacteria and continuous disinfection capability, studied residual chlorine decay, the concentration of disinfection by-products and biological stability, comprehensively e-valuated the safety of chlorine disinfection about bio-security and chemical safety. The results show, coagulation-powder activated carbon - ultrafiltration has the best effection, which can remove 100 % total bacteria and E.coil. It has strong continued disinfection capability, after 72 h the amount of residual chlorine in water is 0.5 mg/L, the total bacteria and E. Coil removal rate is still 100 %, and HPC is less than 100 CFU/mL, meeting drinking water health standards. Its THMs concentration is under 10 μg/L, AOC is lower than 100μgac-C/L, consistent with the requirements of biological stability of chlorination.
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