Reductive dechlorination and mineralization of pentachlorophenol in biocathode microbial fuel cells

Liping Huang, Xiaolei Chai, Xie Quan, Bruce E. Logan, Guohua Chen

Research output: Journal article publicationJournal articleAcademic researchpeer-review

87 Citations (Scopus)

Abstract

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±0.05mg/L-h (51.5mg/gVSS-h) along with power generation of 2.5±0.03W/m3. Operating the biocathode MFC at 50°C improved the PCP degradation rate to 0.523±0.08mg/L-h (103mg/gVSS-h) and power production to 5.2±0.03W/m3. A pH of 6.0 increased the PCP degradation rate to 0.365±0.02mg/L-h (71.5mg/gVSS-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.
Original languageEnglish
Pages (from-to)167-174
Number of pages8
JournalBioresource Technology
Volume111
DOIs
Publication statusPublished - 1 May 2012
Externally publishedYes

Keywords

  • Biocathode
  • Degradation pathway
  • Microbial fuel cell
  • Pentachlorophenol

ASJC Scopus subject areas

  • Bioengineering
  • Environmental Engineering
  • Renewable Energy, Sustainability and the Environment
  • Waste Management and Disposal

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