冲击氯消毒控制建筑供水管道二次污染  

Effect of Shock Chlorine Disinfection on Secondary Pollution in Building Water Supply System

作　　者：王帅[1] 杨艳玲[1] 相坤[1] 李星[1] 赵锂[2] 陈永[2] 

机构地区：[1]北京工业大学建筑工程学院,北京100124 [2]中国建筑设计研究院,北京100044

出　　处：《中国给水排水》2016年第15期5-8,13,共5页China Water & Wastewater

基　　金：国家水体污染控制与治理科技重大专项(2014ZX07406002);北京工业大学研究生科技基金资助项目(ykj-2015-11783)

摘　　要：针对建筑小区的供水管道存在的生物作用等二次污染问题，研究了冲击氯消毒技术对DOC降解和硝化作用的控制效果以及对副产物溴酸盐的影响。结果表明，冲击氯消毒可有效控制DOC降解和硝化作用，生物降解作用明显减弱，可显著降低微生物超标的风险和威胁。停止冲击氯消毒后DOC降解和硝化作用逐步恢复，在冲击氯消毒后的第52—80天，DOC降解和硝化作用基本恢复到原有水平，因此有必要进行定期冲击氯消毒。冲击消毒后，BrO3^-浓度总体呈现增加的趋势，但在冲击氯消毒第80天后，供水管道的生物作用限制了BrO3^-的生成，因此在进行冲击氯消毒时，应考虑供水管道中相关消毒副产物的变化趋势以及可能造成的化学安全性风险。Aimed at solving the problem of secondary pollution in building water supply system, the effects of shock chlorine disinfection on dissolved organic carbon （DOC） biodegradation and biologi- cal nitrification as well as the existing bromate were investigated. The results showed that the shock chlo- rine disinfection was effective in controlling the DOC biodegradation and biological nitrification in the building water supply system. Meanwhile, the shock chlorine disinfection could significantly reduce the risk of bacteriological index. However, the biodegradation of DOC and biological nitrification could be re- stored to the original level on the 52na to 80th day after chlorination. Therefore, the shock chlorine disin- fection was required again. After shock chlorine disinfection, BrO3^- concentrations showed an increase trend, and the biodegradation restricted the production of BrO3^- concentration on the 80th day. Conse- quently, there should be paid more attention to the tendency of disinfection by-products and the risk of chemical safety during the shock chlorine disinfection .

关 键 词：建筑小区 供水管道系统 二次污染 冲击氯消毒 消毒副产物 

分 类 号：TU991.2[建筑科学—市政工程]