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Researchers designed and fabricated Multi-Chamber Microbial Fuel Cells (MFCs) using locally available clay as ion exchange partitions, achieving a maximum open circuit voltage of 1421 ± 30 mV and peak power density of 33.30 mW/cm².

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What they did

System
MFC

What worked

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Abstract

The main challenges in the construction of microbial fuel cells (MFCs) are the identification of materials, designs, and architectures that may maximize power generation efficiency and fabrication cost. In view of these facts, an attempt was made to design and fabricate Multi – Chamber MFCs of different configuration using locally available Mfensi clay as ionexchange partitions. The performance of each micro-cell, combined effect of the total system as one cell, and the overall performance were studied. The volume of each chamber of these cells was approximately 130 cm³ . It was found that the wastewater of chemical oxygen demand (COD) that was 6340 gm/L used in the MFCs yielded a maximum open circuit voltage (OCV) of 1421 ± 30 mV. The peak power density of 33.30 mW/cm² (0.037 mA/cm² ) at 1000 Ω was normalized to the anode surface area

Key findings

  • The use of clay as ion exchange partitions in MFCs is a novel approach to maximize power generation efficiency and reduce fabrication cost.
  • The wastewater with a COD of 6340 gm/L yielded a maximum open circuit voltage of 1421 ± 30 mV.
  • The peak power density of 33.30 mW/cm² was achieved at 1000 Ω, normalized to the anode surface area.

Keywords

Microbial fuel cellAnodeFabricationOpen-circuit voltagePower densityIon exchange

Identifiers

DOI
10.19044/esj.2017.v13n30p173
Journal
European Scientific Journal, ESJ
Year
2017