Effects of operating conditions on trihalomethanes formation and speciation during chloramination in reclaimed water
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- 作者：Fang Wang ; Baoyu Gao ; Defang Ma ; Ruihua Li…
- 关键词：Chloramination ; Trihalomethanes formation ; THMs speciation ; Reclaimed water ; Membrane bioreactor ; Powdered activated carbon
- 刊名：Environmental Science and Pollution Research
- 出版年：2016
- 出版时间：January 2016
- 年：2016
- 卷：23
- 期：2
- 页码：1576-1583
- 全文大小：451 KB
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Baoyu Gao (1)
Defang Ma (1)
Ruihua Li (1)
Shenglei Sun (1)
Qinyan Yue (1)
Yan Wang (1)
Qian Li (1)
1. Shandong Key Laboratory of Water Pollution Control and Resource Reuse, School of Environmental Science and Engineering, Shandong University, Ji’ nan, 250100, China - 刊物类别：Earth and Environmental Science
- 刊物主题：Environment
Environment
Atmospheric Protection, Air Quality Control and Air Pollution
Waste Water Technology, Water Pollution Control, Water Management and Aquatic Pollution
Industrial Pollution Prevention - 出版者：Springer Berlin / Heidelberg
- ISSN：1614-7499
文摘
In this study, a hybrid powdered activated carbon-membrane bioreactor (PAC-MBR) system was used to treat municipal wastewater in northern China intended for recycle. In order to control microbiological hazards in PAC-MBR effluent, chloramine was chosen as the disinfectant which could reduce the disinfection by-product yields. Effects of reaction time, chloramines dose, pH value, and bromide ion concentration on trihalomethanes (THMs) formation and speciation during chloramination of the reclaimed effluent were investigated. Study results indicated that the yield of total THMs (TTHM) increased at higher reaction time and chloramines dose. The trend of growth showed that slow reacting precursors were the main components of dissolved organic matter (DOM) in PAC-MBR effluent. THMs formation potential of PAC-MBR effluent achieved the maximum at chloramines dosage of 20 mg/L. Meanwhile, THMs formation was enhanced evidently under alkaline conditions. The yields of THMs species were in following order: CHCl3 > CHBrCl2 > CHBr2Cl > CHBr3, although in different reaction time, chloramines dose, and pH value. Furthermore, the formation of Br-THMs was promoted by the increasing concentration of bromide ion. Keywords Chloramination Trihalomethanes formation THMs speciation Reclaimed water Membrane bioreactor Powdered activated carbon