Effect of PH on the Performance of the Anode in Microbial Fuel Cells

En Ren Zhang; Lei Liu; Ying Ying Cui

doi:10.4028/www.scientific.net/AMR.608-609.884

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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 608-609Effect of PH on the Performance of the Anode in...

Effect of PH on the Performance of the Anode in Microbial Fuel Cells

Abstract:

Microbial fuel cells with microbial brush anode and ferricyanide-cathode which could discharge at current up to 350 mA were constructed, and the effect of anodic pH on the performance of the microbial anode was investigated in the present study. Anodic pH was found to decrease significantly， from 6.23 to 4.35, when the MFC was operated to discharge at high current levels, which in turn reduced the performance of the microbial anode. No obvious pH change was observed during MFC discharge at lower current level (~12 mA), meaning that proton production is mainly related to the electrochemical oxidization of the organic fuels, rather than to the microbial degradation in the anode chamber. Results presented herein indicate that effective approach should be employed to control the anodic pH close to neutral conditions when optimizing the power output of microbial fuel cells, especially at high discharge current.

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Periodical:

Advanced Materials Research (Volumes 608-609)

Pages:

884-888

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.608-609.884

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Online since:

December 2012

Authors:

En Ren Zhang, Lei Liu, Ying Ying Cui

Keywords:

Brush Electrode, Microbial Fuel Cell (MFC), pH Effect

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