Journal
BIORESOURCE TECHNOLOGY
Volume 111, Issue -, Pages 167-174Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2012.01.171
Keywords
Microbial fuel cell; Biocathode; Pentachlorophenol; Degradation pathway
Funding
- National Basic Research Program of China [2011CB936002]
- Natural Science Foundation of China [21077017, 51178077]
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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.
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