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This paper optimizes the performance of dual-chamber microbial fuel cells (MFCs) by analyzing the effects of anode and cathode surface areas and anode chamber substrate volume on voltage output.

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Reported parameters

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What they did

System
MFC

What worked

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Abstract

Low electricity output of microbial fuel cells (MFCs) has continued to limit their large-scale applications, as bioenergy sources. Thus effects of surface area of anode (0.005 to 0.015 m²), surface area of cathode (0.005 to 0.015 m²) and volume of substrate in anode chamber (750 to 1500 ml), on MFCs voltage output, were optimized. Replicated Box Behnken Design (Minitab) gave 30 runs. After 25 days operation, average voltage generated by MFCs ranged from 7.76±0.28 mV to 34.32±3.2 mV, across 10 kΩ. Response Optimizer (Minitab) indicated 0.011 m² as optimal surface area of anode, 0.015 m² for cathode and 1500 mL for volume of substrate in anode chamber, with estimated maximum voltage of 4

Key findings

  • Optimal anode surface area is 0.011 m², resulting in maximum voltage of 43.52 mV.
  • Optimal cathode surface area is 0.015 m², resulting in maximum voltage of 43.52 mV.
  • Optimal anode chamber substrate volume is 1500 mL, resulting in maximum voltage of 43.52 mV.

Keywords

MFC3D modelingextracted

Identifiers

Journal
of Power Sources. 2006, 162:1409-1415.
Year
2018