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Received: 2006-03-21

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Journal of Zhejiang University SCIENCE A 2006 Vol.7 No.101 P.340~344


Treatment of wastewater from dye manufacturing industry by coagulation

Author(s):  Yuan Yu-Li, Wen Yue-Zhong, Li Xiao-Ying, Luo Si-Zhen

Affiliation(s):  Institute of Environmental Science, Zhejiang University, Hangzhou 310029, China

Corresponding email(s):   wenyuezhong@zju.edu.cn

Key Words:  Dye manufacturing industry, Coagulation, Treatment, Wastewater

Yuan Yu-Li, Wen Yue-Zhong, Li Xiao-Ying, Luo Si-Zhen. Treatment of wastewater from dye manufacturing industry by coagulation[J]. Journal of Zhejiang University Science A, 2006, 7(101): 340~344.

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author="Yuan Yu-Li, Wen Yue-Zhong, Li Xiao-Ying, Luo Si-Zhen",
journal="Journal of Zhejiang University Science A",
publisher="Zhejiang University Press & Springer",

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%T Treatment of wastewater from dye manufacturing industry by coagulation
%A Yuan Yu-Li
%A Wen Yue-Zhong
%A Li Xiao-Ying
%A Luo Si-Zhen
%J Journal of Zhejiang University SCIENCE A
%V 7
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%@ 1673-565X
%D 2006
%I Zhejiang University Press & Springer
%DOI 10.1631/jzus.2006.AS0340

T1 - Treatment of wastewater from dye manufacturing industry by coagulation
A1 - Yuan Yu-Li
A1 - Wen Yue-Zhong
A1 - Li Xiao-Ying
A1 - Luo Si-Zhen
J0 - Journal of Zhejiang University Science A
VL - 7
IS - 101
SP - 340
EP - 344
%@ 1673-565X
Y1 - 2006
PB - Zhejiang University Press & Springer
ER -
DOI - 10.1631/jzus.2006.AS0340

Chemical coagulation was used to remove the compounds present in wastewater from dye manufacturing industry. The character of wastewater was determined. Most compounds found in the wastewater are phenol derivatives, aniline derivatives, organic acid and benzene derivatives, output from dye manufacturing. Various polyferric chloride coagulants were investigated. Results showed that high extent of Fe(III) hydrolysis was not always suited for chemical oxygen demand (COD) removal in our wastewater, that electrostatic interaction between flocs and organic contaminants played an important role in removal of organic contaminants, that copolymers of Al(III), Si(IV) and Fe(III) were helpful for high flocculating effect, that COD removal efficiency of poly-silicate-aluminium-ferric chloride (PSAFC) and polyferric chloride (PFC) coagulant increased with increasing dose of coagulants, and that the performance of PSAFC and PFC coagulants was superior to PAC coagulant. This difference in efficiency may also be attributed to the copolymers of Si(IV), Al(III)and Fe(III). However, compared with PFC, PSAFC can easily reach high COD removal efficiency below coagulant dose 0.3 g/L. Thus, from the economic point of view, PSAFC is more suitable for treatment of wastewater effluent from dye manufacturing.

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