预氯化对再生水混凝沉淀/微滤处理效果的影响  

Effect of Prechlorination on Coagulation Sedimentation and Microfiltration in Reclaimed Water Treatment

作　　者：吴云龙[1] 田一梅[1] 刘鸿鹄[2] 张亮[2] 李晋[2] 

机构地区：[1]天津大学环境科学与工程学院,天津300072 [2]天津中水有限公司,天津300221

出　　处：《中国给水排水》2014年第17期73-76,共4页China Water & Wastewater

基　　金：国家水体污染控制与治理科技重大专项(2009ZX07317-005-01)

摘　　要：天津某再生水厂在混凝沉淀预处理系统中通过加氯以控制处理过程中微生物的生长。然而,加氯量不仅直接影响到水厂运行成本,而且对于混凝沉淀处理效果及后续微滤膜污染情况也有一定影响。采用混凝沉淀/微滤中试系统,在聚合氯化铝(PAC)投加量为12 mg/L条件下,研究了加氯量对混凝沉淀处理效果及微滤膜污染的影响。结果表明:预氯化强化了混凝沉淀/微滤系统对色度、浊度、总磷、氨氮、COD、UV254的去除效果,并在一定程度上减缓了膜污染。试验最终确定最佳加氯量为5 mg/L,这对再生水厂实际生产运行具有一定的参考作用,能够减少水厂运行成本,延长微滤膜的使用寿命。A reclaimed water treatment plant adopted chlorine to control the microbial growth in the coagulation sedimentation treatment system. The dosage of chlorine not only affected the operation cost but also had some effects on the treatment of coagulation sedimentation and the subsequent microfil- tration membrane fouling. The coagulation sedimentation and microfiltration pilot test system was used to investigate the effects of different chlorine dosages on the treatment efficiency of coagulation sedimentation and the subsequent microfiltration membrane fouling when the PAC dosage was 12 mg/L. The results showed that prechlorination enhanced the removal efficiencies of color, turbidity, TP, ammonia nitrogen, COD and UV254 by the coagulation sedimentation and microfihration system, and reduced membrane foul- ing to a certain extent. The optimal dosage of chlorine was determined to be 5 mg/L. A certain reference was provided for the actual production of reclaimed water treatment plants by reducing the operation cost and prolonging the service life of membrane.

关 键 词：预氯化 混凝沉淀 微滤 去除率 

分 类 号：X703[环境科学与工程—环境工程]