Using prechloramination to control trihalomethanes formation in River Huang water with high bromide  

作　　者：陶辉 陈卫 林涛 刘成 陈杰 李圭白 

机构地区：[1]Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes,College of Environmental Science and Engineering,Hohai University [2]School of Municipal and Environmental Engineering,Harbin Institute of Technology [3]Suzhou Litree Ultra-filtration Membrane Technology Co,.Ltd.

出　　处：《Journal of Harbin Institute of Technology(New Series)》2008年第5期722-727,共6页哈尔滨工业大学学报（英文版）

基　　金：Sponsored by the National High Technology Research and Development Program of China(Grant No.2002AA601140)

摘　　要：An effective technology in controlling trihalomethanes （THMs） formation in the case of large amounts of bromide presenting was proposed, and the water of River Huang seriously polluted by bromide in winter in Tianjin City was studied. The THMs formation characteristics during prechloramination using preformed chloramines and converted chloramines were studied through jar tests. Results show that, in prechloramination process, the formation of THMs by preformed chloramines is very few, while that by converted ehloramines is a little higher. And the formation of THMs, especially Br^- substituted THMs, increases with the increase of time and Cl2：N ratio as well as the decrease of pH. The result obtained in a pilot plant shows that compared with prechlorination, the prechloramination process can efficiently control the formation of THMs, especially the Br^- substituted species. With equal chlorine dosage, the prechloramination can maintain a larger chlorine residue which offece, a larger CT value than prechlorination.An effective technology in controlling trihalomethanes (THMs) formation in the case of large amounts of bromide presenting was proposed, and the water of River Huang seriously polluted by bromide in winter in Tianjin City was studied. The THMs formation characteristics during prechloramination using preformed chloramines and converted chloramines were studied through jar tests. Results show that, in prechloramination process, the formation of THMs by preformed chloramines is very few, while that by converted chloramines is a little higher. And the formation of THMs, especially Br-substituted THMs, increases with the increase of time and Cl2:N ratio as well as the decrease of pH. The result obtained in a pilot plant shows that compared with prechlorination, the prechloramination process can efficiently control the formation of THMs, especially the Br-substituted species. With equal chlorine dosage, the prechloramination can maintain a larger chlorine residue which offers a larger CT value than prechlorination.

关 键 词：prechloramination TRIHALOMETHANES BROMIDE pilot plant chemical security 

分 类 号：TU991.2[建筑科学—市政工程]