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This study analyzed the performance of different anode materials in a double-chambered microbial fuel cell, finding that carbon cloth provided better output than graphite bar and aluminum foil.

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Dual-chamber H-cell MFCRepresentative model
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Representative dual-chamber H-cell — matched on the paper’s reported configuration, not its exact geometry.

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What they did

System
MFC
Substrate
real wastewater

What worked

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Abstract

Microbial fuel cells (MFCs) are bio-electrochemical systems (BES) that can oxidize and convert biodegradable wastes directly into electricity via microbial metabolism. Since the oxidation half-cell of an MFC consists of the biodegradable electrolyte and anode, the selection of the right anode materials is essential to optimize the performance of MFCs. Anode acts as the governing support for the growth of biofilm to transfer the electrons. In general, anode materials must have a reasonable surface area for bacterial growth, good conduction, excellent biocompatibility, chemical stability, high mechanical strength, and low cost. In this work, graphite bar, aluminum foil, and carbon cloth were tested as an anode. The comparative performances of them were analyzed in a double chambered MFC containing industrial wastewater with respect to the power density and waste removal efficiency of MFCs. The carbon cloth anode provided better output than graphite bar and aluminum foil. The 10 days of batch operation for carbon cloth anode resulted in a maximum of 672.34 mWm-3 power density and 52.20% removal of chemical oxygen demand (COD). Chemical Engineering Research Bulletin 21(2020) 26-31

Key findings

  • Carbon cloth anode resulted in a maximum of 672.34 mWm-3 power density.
  • Carbon cloth anode achieved 52.20% removal of chemical oxygen demand (COD).
  • Graphite bar and aluminum foil anodes performed poorly compared to carbon cloth.

Keywords

Microbial fuel cellAnodeChemical engineeringChemical oxygen demandCarbon fibersElectrolyte

Identifiers

DOI
10.3329/cerb.v22i1.54295
Journal
Chemical Engineering Research Bulletin
Year
2021