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Reductive dechlorination and mineralization of pentachlorophenol in biocathode microbial fuel cells

Authors Huang, Liping
Chai, Xiaolei
Quan, Xie
Logan, Bruce E.
Chen, Guohua View this author's profile
Issue Date 2012
Source Bioresource technology , v. 111, May 2012, p. 167-174
Summary Simultaneous anaerobic and aerobic degradation pathways in two-chamber, tubular microbial fuel cells (MFCs) facilitated pentachlorophenol (PCP) mineralization by a mediator-less biocathode. PCP was degraded at a rate of 0.263 +/- 0.05 mg/L-h (51.5 mg/g VSS-h) along with power generation of 2.5 +/- 0.03 W/m(3). Operating the biocathode MFC at 50 degrees C improved the PCP degradation rate to 0.523 +/- 0.08 mg/L-h (103 mg/g VSS-h) and power production to 5.2 +/- 0.03 W/m(3). A pH of 6.0 increased the PCP degradation rate to 0.365 +/- 0.02 mg/L-h (71.5 mg/g VSS-h), but reduced power. While mediators were not needed, adding anthraquinone-2,6-disulfonate increased power and PCP degradation rates. Dominant bacteria most similar to the anaerobic Desulfobacterium aniline, Actinomycetes and Streptacidiphilus, and aerobic Rhodococcus erythropolis, Amycolatopsis and Gordonia were found on the biocathode. These results demonstrate efficient degradation of PCP in biocathode MFCs and the effects of temperature, pH and mediators. (C) 2012 Elsevier Ltd. All rights reserved.
ISSN 0960-8524
Language English
Format Article
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