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Assessment of the Effects of Flow Rate and Ionic Strength on the Performance of an Air-Cathode Microbial Fuel Cell Using Electrochemical Impedance Spectroscopy

Author

Listed:
  • Doug Aaron

    (School of Civil and Environmental Engineering, Georgia Institute of Technology, Atlanta, GA 30332, USA)

  • Costas Tsouris

    (School of Civil and Environmental Engineering, Georgia Institute of Technology, Atlanta, GA 30332, USA
    Nuclear Sciences and Technology Division, Oak Ridge National Laboratory, Oak Ridge, TN 37831, USA)

  • Choo Y. Hamilton

    (The University of Tennessee, Knoxville, TN 37996, USA)

  • Abhijeet P. Borole

    (BioSciences Division, Oak Ridge National Laboratory, Oak Ridge, TN 37831, USA)

Abstract

Impedance changes of the anode, cathode and solution were examined for an air-cathode microbial fuel cell (MFC) under varying conditions. An MFC inoculated with a pre-enriched microbial culture resulted in a startup time of less than ten days. Over this period, the anode impedance decreased below the cathode impedance, suggesting a cathode-limited power output. Increasing the anode flow rate did not impact the anode impedance significantly, but it decreased the cathode impedance by 65%. Increasing the anode-medium ionic strength also decreased the cathode impedance. These impedance results provide insight into electron and proton transport mechanisms and can be used to improve MFC performance.

Suggested Citation

  • Doug Aaron & Costas Tsouris & Choo Y. Hamilton & Abhijeet P. Borole, 2010. "Assessment of the Effects of Flow Rate and Ionic Strength on the Performance of an Air-Cathode Microbial Fuel Cell Using Electrochemical Impedance Spectroscopy," Energies, MDPI, vol. 3(4), pages 1-15, March.
    • Handle: RePEc:gam:jeners:v:3:y:2010:i:4:p:592-606:d:7646
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    Cited by:

    1. Ankisha Vijay & Prakash C. Ghosh & Suparna Mukherji, 2023. "Power Generation by Halophilic Bacteria and Assessment of the Effect of Salinity on Performance of a Denitrifying Microbial Fuel Cell," Energies, MDPI, vol. 16(2), pages 1-16, January.
    2. Hongjun Ni & Kaixuan Wang & Shuaishuai Lv & Xingxing Wang & Lu Zhuo & Jiaqiao Zhang, 2020. "Effects of Concentration Variations on the Performance and Microbial Community in Microbial Fuel Cell Using Swine Wastewater," Energies, MDPI, vol. 13(9), pages 1-11, May.

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