Biological Treatment of Washing Black Liquid in Refined Cotton Production

doi:10.3969/j.issn.1000-1093.2014.10.010

Abstract

Abstract: Washing black liquid is a kind of waste water produced in the pressing and washing processes of refined cotton. Separate treatment of washing black liquid is relatively rare. In order to explore the degree and method of washing black liquid biochemical treatment, the two-stage anaerobic-aerobic and single aerobic processes are used to treat the washing black liquid in the pilot scale of 1 cubic meter per day. The result shows that COD of washing black liquid can be reduced from 1 100 mg/L to 330 mg/L in biochemical treatment. With the coagulation of further aluminum sulfate which optimum dosage is 2.5‰(volume ratio), COD of washing black liquid is decreased to less than 100 mg/L and the chroma achieves less than 50 times. Stench is created by sulfate reduction in the anaerobic treatment process, which decreases the activity of microorganism. Therefore, the washing black liquid is suitable for the direct coagulation treatment of aerobic-aluminum sulfate.

Key words: environmental engineering, washing black liquid, anaerobic process, aerobic process, sulfate

CLC Number:

X703.1

JING Xiang-shun, ZHOU Bang-you, GAO Jin-yan, CHEN Min, REN Yong， YUAN Cong-yan. Biological Treatment of Washing Black Liquid in Refined Cotton Production[J]. Acta Armamentarii, 2014, 35(10): 1581-1586.

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