调节pH值和碱度对给水管网铁释放的控制作用  

Control Effect of Regulating pH and Alkalinity on Iron Release in Drinking Water Distribution System

作　　者：米子龙[1] 张晓健[1] 王洋[1,2] 陈超[1] 顾军农 

机构地区：[1]清华大学环境学院,北京100084 [2]北京市市政工程设计研究总院,北京100082 [3]北京市自来水集团,北京100192

出　　处：《中国给水排水》2012年第13期43-46,共4页China Water & Wastewater

基　　金：国际科技交流与合作项目(2010DFA91830);国家高技术研究发展计划(863)项目(2009AA06Z308);国家水体污染控制与治理科技重大专项(2009ZX07424-003)

摘　　要：利用管段模拟反应器,定量分析了调节pH值和调节碱度技术对给水管网铁释放的控制作用。研究发现,提高pH值和增加碱度均可使管网铁释放速率、浊度和色度明显降低。调节pH值从7.6增加至8.2,15 d后管网铁释放速率降低了47%,浊度降低了54%,色度降低了46%;调节碱度从135 mg/L增加至260 mg/L(以CaCO3计),15 d后管网铁释放速率降低了50%,浊度降低了58%,色度降低了52%。对比评价了调节pH值和调节碱度技术的经济性,结果表明:调节出厂水pH值控制管网铁释放的经济成本适宜,可作为突发性管网"黄水"问题的应急控制技术。The control effect of regulating pH and alkalinity on iron release in the drinking water distribution system was investigated. Experiments using the pipe section simulation reactor found that the iron release rate, turbidity and color decreased significantly with increasing pH and alkalinity. Specifically, after increasing pH from 7.6 to 8.2 for 15 d, the iron release rate, turbidity and color decreased by 47% , 54% and 46% , respectively. Meanwhile, increasing alkalinity from 135 mg/L to 260 mg/L （ cal- culated as CaCO3） for 15 d, the iron release rate, turbidity and color decreased by 50% , 58% and 52% , respectively. The cost-effectiveness of regulating pH and alkalinity to control iron release in drink- ing water was evaluated. The results showed that the cost of regulating pH of finished water was appropriate. This method can be used as an emergency water treatment technology for red water control.

关 键 词：PH值 碱度 给水管网 铁释放 “黄水”控制 

分 类 号：TU991.33[建筑科学—市政工程]