| Using chloramine as a coagulant aid in enhancing coagulation of Yellow River water in China |
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| 作者姓名： | YANG Wei CHEN Jie LI Xing LIANG Heng HE Wen-jie LI Gui-bai |
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| 作者单位： | YANG Wei1，2，CHEN Jie3，LI Xing4，LIANG Heng2，HE Wen-jie5，LI Gui-bai2 (1Department of Environmental Engineering，Harbin University of Commerce，Harbin 150076，China) (2School of Municipal and Environmental Engineering，Harbin Institute of Technology，Harbin 150090，China) (3Suzhou Litree Ultra-filtration Membrane Technology Co.，Ltd.，Suzhou 215152，China) (4College of Civil Engineering and Architecture，Beijing University of Technology，Beijing 100023，China) (5Tianjin Waterworks Group Company Ltd.，Tianjin 300040，China) |
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| 基金项目： | Project supported by the Hi-Tcch Research and Development Program （863） of China （No. 2002AA601140）, and the Natural Science Foundation of Heilongjiang Province （No. E200510）, China |
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| 摘 要： | Considering that contaminated raw water mostly contains high Ammonia-N and a majority of water treatment plants use prechlorination process in China,efficiency of chloramines as a coagulant aid in enhancing coagulation was investigated by Jar stirring and pilot-scale tests,using Yellow River water containing high concentration of natural organic matters (NOM) and bromide in winter. The jar tests results showed that,compared with no preoxidation,preformed chloramine apparently decreased the turbidity of settled and filtered water with low dosage (2.0 mg/L),and the aid-coagulation efficiency was further enhanced with the increase of chlorine (Cl2) to Ammonia-N (N) ratio. Pilot-scale studies indicated that,in comparison to the case without pre-oxidation,the turbidity removal efficiency of flotation and filtration effluent water was significantly improved,the particle counts of filtered water were decreased 63.4%,the average rate of filter head loss was reduced 18.2%,and filter run time was prolonged 15.7%. Therefore,chloramine preoxidation may substantially enhance the particle separation efficiency.
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| 关 键 词： | 中国 黄河水处理 絮凝 氯胺 试验工场 预氧化 混浊 |
| 收稿时间： | 30 November 2006 |
| 修稿时间： | 2006-11-302007-04-09 |
Using chloramine as a coagulant aid in enhancing coagulation of Yellow River water in China |
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| YANG Wei CHEN Jie LI Xing LIANG Heng HE Wen-jie LI Gui-bai.Using chloramine as a coagulant aid in enhancing coagulation of Yellow River water in China[J].Journal of Zhejiang University Science,2007,8(9):1475-1481. |
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| Authors: | Yang Wei Chen Jie Li Xing Liang Heng He Wen-jie Li Gui-bai |
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| Institution: | (1) Department of Environmental Engineering, Harbin University of Commerce, Harbin, 150076, China;(2) School of Municipal and Environmental Engineering, Harbin Institute of Technology, Harbin, 150090, China;(3) Suzhou Litree Ultra-filtration Membrane Technology Co., Ltd., Suzhou, 215152, China;(4) College of Civil Engineering and Architecture, Beijing University of Technology, Beijing, 100023, China;(5) Tianjin Waterworks Group Company Ltd., Tianjin, 300040, China |
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| Abstract: | Considering that contaminated raw water mostly contains high Ammonia-N and a majority of water treatment plants use prechlorination process in China,efficiency of chloramines as a coagulant aid in enhancing coagulation was investigated by Jar stirring and pilot-scale tests,using Yellow River water containing high concentration of natural organic matters (NOM) and bromide in winter. The jar tests results showed that,compared with no preoxidation,preformed chloramine apparently decreased the turbidity of settled and filtered water with low dosage (2.0 mg/L),and the aid-coagulation efficiency was further enhanced with the increase of chlorine (Cl2) to Ammonia-N (N) ratio. Pilot-scale studies indicated that,in comparison to the case without pre-oxidation,the turbidity removal efficiency of flotation and filtration effluent water was significantly improved,the particle counts of filtered water were decreased 63.4%,the average rate of filter head loss was reduced 18.2%,and filter run time was prolonged 15.7%. Therefore,chloramine preoxidation may substantially enhance the particle separation efficiency. |
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| Keywords: | Preoxidation Chloramine Pilot plant Turbidity Particle counts Filter run time |
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