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This study examined the effect of MnO2, activated carbon, and fly ash as catalysts on the performance of single-chamber Microbial Fuel Cells, achieving high COD removal efficiencies and a maximum power output of 2.32 W/m³ with MnO2.

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What they did

System
MFC

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Abstract

Microbial fuel cells (MFC) are bioelectrochemical systems that convert the chemical energy contained in waste to electricity, using bacteria as catalysts. In order to boost the power output of MFCs, various approaches are feasible. This study examines the effect of using MnO2, activated carbon and fly ash as catalysts on the performance of three identical single-chamber MFCs. Ceramic (mullite) tubes run through the chamber providing structural support to the catalyst. Graphite granules were used as the anode electrode for all units. The cells operated in batch mode using glucose (1.5 g COD/L) as substrate. High COD removal efficiencies (>75%) were achieved for all units. The best performance in terms of power output was achieved when using MnO2 catalyst (Pmax=2.32 W/m³).

Key findings

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Keywords

Microbial fuel cellAnodeCatalysisActivated carbonCarbon fibersGraphite

Identifiers

DOI
10.30955/gnc2021.00293
Journal
Global NEST International Conference on Environmental Science & Technology
Year
2022