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Journal of Zhejiang University SCIENCE A 2007 Vol.8 No.9 P.1475-1481


Using chloramine as a coagulant aid in enhancing coagulation of Yellow River water in China

Author(s):  YANG Wei, CHEN Jie, LI Xing, LIANG Heng, HE Wen-jie, LI Gui-bai

Affiliation(s):  Department of Environmental Engineering, Harbin University of Commerce, Harbin 150076, China; more

Corresponding email(s):   yangweiyuyang@163.com

Key Words:  Preoxidation, Chloramine, Pilot plant, Turbidity, Particle counts, Filter run time

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 A, 2007, 8(9): 1475-1481.

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journal="Journal of Zhejiang University Science A",
publisher="Zhejiang University Press & Springer",

%0 Journal Article
%T Using chloramine as a coagulant aid in enhancing coagulation of Yellow River water in China
%A LI Xing
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%A LI Gui-bai
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%D 2007
%I Zhejiang University Press & Springer
%DOI 10.1631/jzus.2007.A1475

T1 - Using chloramine as a coagulant aid in enhancing coagulation of Yellow River water in China
A1 - YANG Wei
A1 - CHEN Jie
A1 - LI Xing
A1 - LIANG Heng
A1 - HE Wen-jie
A1 - LI Gui-bai
J0 - Journal of Zhejiang University Science A
VL - 8
IS - 9
SP - 1475
EP - 1481
%@ 1673-565X
Y1 - 2007
PB - Zhejiang University Press & Springer
ER -
DOI - 10.1631/jzus.2007.A1475

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 preoxidation, 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.

Darkslateblue:Affiliate; Royal Blue:Author; Turquoise:Article


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