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	Effects of operating conditions on THMs and HAAs formation during wastewater chlorination
	Sun, Ying-Xue ; Wu, Qian-Yuan ; Hu, Hong-Ying ; Tian, Jie
	2010-10-12 ; 2010-10-12
关键词	Chlorination THMs HAAs Wastewater reuse Wastewater disinfection DISINFECTION BY-PRODUCTS DISSOLVED ORGANIC-MATTER DRINKING-WATER SECONDARY EFFLUENT BROMIDE ION TRIHALOMETHANES AMMONIA DECOMPOSITION FRACTIONS ACIDS Engineering, Environmental Engineering, Civil Environmental Sciences
中文摘要	Disinfection is the last barrier of wastewater reclamation process to protect ecosystem safety and human health. However, the chlorination process results in the formation of mutagenic/carcinogenic disinfection by-products (DBPs) deriving from the reaction of the chlorine with organic compounds in wastewater. The effects of operating conditions (chlorine dose, contact time. reaction temperature and pH value) of chlorination on the formation of trihalomethanes (THMs) and haloacetic acids (HAAs) in biologically treated wastewater samples were investigated in this study. The results indicated that the total THMs (TTHM) and total HAAs (THAA) increased exponentially with increasing chlorine dose, but there are discrepancies between the formation rates of TTHM and THAA. The THAA reached a peak at contact time of 2 h and thereafter decreased with extended time. The formation time of THMs depends on the wastewater content of quick or slow formers. The yields of bromated HAAs (as MBAA, BCAA, and BDCAA) would decrease markedly after the contact time over 2 h during wastewater chlorination, and were favored in low pH values of 4 and high pH values of 9 under certain contact time. in addition, the formation of MBAA, BCAA, BDCAA decreased gradually as reaction temperature increased from 4 to 30 degrees C in the chlorination of wastewater containing a certain concentration of bromide. The effects of operating conditions on THMs and HAAs formation during wastewater chlorination were completely different from those of surface water disinfection. (C) 2009 Elsevier B.V. All rights reserved.
语种	英语 ; 英语
出版者	ELSEVIER SCIENCE BV ; AMSTERDAM ; PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
内容类型	期刊论文
源URL	[http://hdl.handle.net/123456789/79633]
专题	清华大学
推荐引用方式 GB/T 7714	Sun, Ying-Xue,Wu, Qian-Yuan,Hu, Hong-Ying,et al. Effects of operating conditions on THMs and HAAs formation during wastewater chlorination[J],2010, 2010.
APA	Sun, Ying-Xue,Wu, Qian-Yuan,Hu, Hong-Ying,&Tian, Jie.(2010).Effects of operating conditions on THMs and HAAs formation during wastewater chlorination..
MLA	Sun, Ying-Xue,et al."Effects of operating conditions on THMs and HAAs formation during wastewater chlorination".(2010).

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