Effectiveness of tannins obtained from valonia as a coagulant aid for dewatering of sludge

被引：65

作者：

Özacar, M ^{[1
]}

Sengil, A ^{[1
]}

机构：

[1] Sakarya Univ, Sci & Arts Fac, Dept Chem, TR-54100 Sakarya, Turkey

来源：

WATER RESEARCH | 2000年 / 34卷 / 04期

关键词：

tannins; natural coagulant aid; polyelectrolytes; coagulation; specific resistance of sludge;

D O I：

10.1016/S0043-1354(99)00276-6

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

For evaluating the tannin (natural polyelectrolyte) and AN913 (synthetic anionic polyelectrolyte) as a coagulant aid For treating raw water to remove suspended matter the tannin or AN913 was added to the synthetic water sample which was stirred and then allowed to settle. After a settled time a sample of the supernatant liquid was removed and its turbidity determined. For use as sludge conditioners the optimum polymer dose was determined. Formed sludge dewatering investigated for optimum pH and optimum dose of coagulant and coagulant aids. The sludge filterability was determined by specific resistance measurements. Tannin and Al(2)(SO(4))(3) together gave a significant improvement comparing with Al(2)(SO(4))(3) only. As coagulant aids, tannin was more effective than AN913. (C) 2000 Elsevier Science Ltd. All rights reserved.

引用

页码：1407 / 1412

页数：6

共 23 条

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[2]

BLISS ED, 1989, CHEM SIGNIFICANCE CO, P493

[3]

Bratby J., 1980, COAGULATION FLOCCULA

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