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Flocculant Screening for the Pretreatment of Printing and Dyeing Wastewater

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Abstract:

Study on the pretreatment of printing and dyeing wastewater with PAC、Fe2(SO4)3 and FeCl3 was carried out. Effects of the flocculants dosage, pH on the treatment efficiency were studied. The results showed that with PAC, Fe2(SO4)3 and the FeCl3 dosage rising, the treatment effect first decreased and then increased and when the addition amount was 300 mg.L-1、300mg.L-1and 250 mg.L-1,the COD removal efficiency achieved 69%、78%、74% , respectively. With the rising of pH, the treatment effects of the three types of flocculants increased first and then decreased, the optimum pH of PAC and Fe2(SO4)3 was 7and the best pH of FeCl3 was 6. At last, the settle ability and the amount of the producing floc were studied, the results showed that the settle ability was the best and the least amount of sludge produced by FeCl3 flocculation. Keywords: printing and dyeing wastewater, pretreatment, flocculants, screening.

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Info:

Periodical:

Advanced Materials Research (Volumes 1010-1012)

Pages:

761-764

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.1010-1012.761

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Online since:

August 2014

Authors:

Shan Hong Lan*, Ping Ma, Shi Wen Geng, Jia Hao Sun, Hui Xia Lan, Heng Zhang

Keywords:

Dyeing Wastewater, Flocculants, Pretreatment, Printing Wastewater, Screening

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© 2014 Trans Tech Publications Ltd. All Rights Reserved

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