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A microbial fuel cell (MFC) was integrated with a biocathode using Bacillus sp. MCO22 and rice straw to generate electricity from palm oil mill effluent (POME). The MFC achieved a maximum current density and power density of 0.58±0.01 A/m² and 0.17±0.00 W/m², respectively, with high COD and color removal rates of 95.10±0.10% and 98.53±0.33%, respectively.

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Representative MFC — matched on the paper’s system type only, not its reactor or geometry.

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What they did

System
MFC

What worked

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Abstract

The microbial fuel cell (MFC) is a device that harnesses microbial metabolism to convert chemical energy into bio-electrical energy. Extensive research has demonstrated its efficacy in both wastewater treatment and power generation applications. This study focused on the integration of a microbial fuel cell (MFC) with a biocathode constructed using the oxidoreductase-producing bacterium Bacillus sp. MCO22 and rice straw as a cost-effective substrate. The MFC utilized palm oil mill effluent (POME) as a chemical energy source for electricity generation in the anodic chamber. The ability of the MFC was evaluated by monitoring biochemical oxygen demand (BOD) activity and electrochemical properties. Post-operation, chemical oxygen demand (COD) and color removal were measured. The results revealed that the MFC with the BOD-based cathode achieved a maximum current density and power density of 0.58±0.01 A/m² and 0.17±0.00 W/m², respectively. Furthermore, it exhibited high COD and color removal rates of 95.10±0.10% and 98.53±0.33%, respectively, without requiring an external power supply. This study presents novel insights into utilizing a BOD-producing bacterium as a whole-cell biocatalyst on the MFC cathodic surface for both electricity generation and agricultural wastewater treatment.

Key findings

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Keywords

Microbial fuel cellChemical oxygen demandBilirubin oxidaseChemical energyPulp and paper industryWastewater

Identifiers

DOI
10.15243/jdmlm.2023.111.4961
Journal
Journal of Degraded and Mining Lands Management
Year
2023