中文摘要：

采用紫外、氯单独与组合方式对再生水处理过程的超滤出水进行了消毒试验，研究了消毒对指示性微生物的去除效果，以及消毒副产物三卤甲烷（THMs）生成量随有效氯投加量的变化。结果表明：在紫外线剂量为25mJ／cm2、有效氯投加量为2mg／L的最佳组合消毒工艺条件下，对细菌总数的去除率为99．94％，出水总大肠菌群数和粪大肠菌群数均小于3CFU／L，消毒后总大肠菌群指标满足《城市污水再生利用城市杂用水水质》（GB／T18920--2002）的要求。THMs的生成量随着有效氯投加量的增加而增加，在最佳组合消毒工艺下其生成量为15．19μg／L，比氯单独消毒（有效氯投加量为4mg／L）时减少了55．36％。

英文摘要：

Single and combination modes of UV and chlorine were used to disinfect the ultrafiltra- tion （UF） effluent in treatment of reclaimed water. The inactivation of microorganisms and influence of different available chlorine dosage on formation of trihalomethanes （THMs） were studied. The results showed that the removal rate of total bacteria was 99.94%, and the total coliform bacteria and the fecal coliform bacteria in the effluent were less than 3 CFU/L under the optimum conditions of UV/chlorine combined process that UV dose was 25 mJ/cm2 and available chlorine dosage was 2 mg/L. The total coli- form bacteria after disinfection met the requirement of the Reuse of Urban Recycling Water--Water Quality Standard for Urban Miscellaneous Water Consumption （ GB/T 18920 - 2002 ）. Concentrations of THMs increased with the raise of available chlorine dosage. Under the optimum conditions of UV/chlorine com- bined process, the formation of THMs was 15.19 μg/L which was decreased by 55.36% compared with single chlorine disinfection with available chlorine dosage of 4 mg/L.