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Received: 2004-10-28

Revision Accepted: 2005-04-21

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Journal of Zhejiang University SCIENCE B 2005 Vol.6 No.6 P.574-579


Study on anaerobic treatment of wastewater containing hexavalent chromium

Author(s):  XU Yan-bin, XIAO Hua-hua, SUN Shui-yu

Affiliation(s):  Faculty of Environmental Science and Engineering, Guangdong University of Technology, Guangzhou 510090, China

Corresponding email(s):   hopeybxu@tom.com

Key Words:  Hexavalent chromium, Wastewater, Anaerobic, Bio-filter bed, Hexavalent chromium bio-removal

XU Yan-bin, XIAO Hua-hua, SUN Shui-yu. Study on anaerobic treatment of wastewater containing hexavalent chromium[J]. Journal of Zhejiang University Science B, 2005, 6(6): 574-579.

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T1 - Study on anaerobic treatment of wastewater containing hexavalent chromium
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A1 - SUN Shui-yu
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DOI - 10.1631/jzus.2005.B0574

A self-made anaerobic bio-filter bed which was inoculated with special sludge showed high efficiency in removing hexavalent chromium. When pump flow was 47 ml/min and CODCr of wastewater was about 140 mg/L, it took 4 h to decrease the Cr6+ concentrations from about 60 mg/L to under 0.5 mg/L, compared with 14 h without carbon source addition. Cr6+ concentrations ranged from 64.66 mg/L to 75.53 mg/L, the system efficiency was excellent. When Cr6+ concentration reached 95.47 mg/L, the treatment time was prolonged to 7.5 h. Compared with the contrast system, the system with trace metals showed clear superiority in that the Cr6+ removal rate increased by 21.26%. Some analyses also showed that hexavalent chromium could probably be bio-reduced to trivalent chromium, and that as a result, the chrome hydroxide sediment was formed on the surface of microorganisms.

Darkslateblue:Affiliate; Royal Blue:Author; Turquoise:Article


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