UF与PAC—UF工艺的微生物去除及消毒效能研究  

Study of microbe removal and disinfection effects with UF and PAC- UF treatment processes

作　　者：奚璐翊[1] 杨艳玲[1] 李星[1] 黄静[1] 安东子[1] 

机构地区：[1]北京工业大学建筑工程学院,北京100124

出　　处：《给水排水》2011年第5期120-124,共5页Water & Wastewater Engineering

摘　　要：研究对比了UF工艺与PAC—UF工艺在不同运行阶段的除污染和微生物截留效能，采用微生物和余氯等指标初步分析了超滤出水中微生物增长的可能原因及影响因素，以及PAC对超滤出水生物安全性的作用。结果表明，不同运行阶段PAC-UF工艺出水的CODMn和UV254都远低于UF工艺，氨氮的去除率也较高，但积累了较多的亚硝酸盐氮。两种工艺在启动运行阶段和膜清洗后运行初期的消毒效果较好，长时间运行过程可造成超滤出水微生物数量增加，影响消毒效果。PAC—UF工艺出水的细菌总数和大肠茵群数小于UF工艺，在相同加氯量时消毒效果更好。在运行初期，PAC-UF工艺出水的余氯高于UF工艺，运行后期会出现余氯低于UF工艺现象。微生物指标和余氯保持的情况表明，两种工艺出水的最佳加氯量均为1mg／L。The pollution removal and microbe effects of the ultrafiltration （UF） process and the powdered activated carbon combined ultrafihration （PAC- UF） process were compared during different operating period. Microbe and residual chlorine indexes were applied to analyze preliminarily the possible reasons and influence factors of microbe growth in UF effluent, and the PAC function to biological safety of UF ef- fluent. The results showed that CODun and UV254 of treated water by PAC- UF process were much lower than those of UF process during different operating period. The ammonia removal rate was also higher by PAC - UF process, but more nitrite nitrogen was accumulated. At startup and cleaned UF membrane peri- ods, the two processes both had better disinfection effects. The microbe in UF effluent could be increased to influence disinfection effect after long term operating. The indexes of total bacteria and total coliforms of treated water by PAC - UF process were less than those by UF process. The better disinfection effect could be achieved by PAC - UF process with the same chlorine dosage. The residual chlorine of trea- ted water by PAC - UF process was higher than that by UF process in the early period, but get low- er than that by UF process in the late period. The maintenance of microbe and residual chlorine in- dexes showed that the optimum chlorine dosage was 1 mg/L for both processes.

关 键 词：超滤 粉末活性炭 消毒 余氯 微生物 

分 类 号：TU991.2[建筑科学—市政工程]