Enhanced coagulation using Al/Fe(III) coagulants: Effect of coagulant chemistry on the removal of colour-causing nom

被引：0
|
作者：
Jiang, JQ
Graham, NJD
机构：
来源：
ENVIRONMENTAL TECHNOLOGY | 1996年 / 17卷 / 09期
关键词：
enhanced coagulation; poly-aluminium coagulants; poly-ferric coagulants; natural organic matter (NOM); trihalomethane formation potential (THMFP); sludge production;
D O I：
暂无
中图分类号：
X [环境科学、安全科学];
学科分类号：
08 ; 0830 ;
摘要：
The addition of excess coagulant and lowering the coagulation pH in order to improve the removal of NOM and DBP precursors have been defined as 'enhanced coagulation'. However, as a consequence, sludge production and treatment costs are increased, and the chemical storage and feed facilities need to be changed. Through developments in coagulant chemistry, various types of pre-polymerised coagulants have been prepared in recent years and been applied widely. In comparison to conventional coagulants under such 'enhanced coagulation' conditions, pre-polymerised coagulants can improve NOM and THMFP removals at relatively lower dosages. In addition, this results in a reduction in the sludge production and treatment costs, and the existing facilities in a water treatment works need not be changed by the use of pre-polymerised coagulants.
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页码：937 / 950
页数：14
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