Performance of two different types of anodes in membrane electrode assembly microbial fuel cells for power generation from domestic wastewater

Sarah Hays, Fang Zhang, Bruce E. Logan

Research output: Contribution to journalArticlepeer-review

85 Scopus citations

Abstract

Graphite fiber brush electrodes provide high surface areas for exoelectrogenic bacteria in microbial fuel cells (MFCs), but the cylindrical brush format limits more compact reactor designs. To enable MFC designs with closer electrode spacing, brush anodes were pressed up against a separator (placed between the electrodes) to reduce the volume occupied by the brush. Higher maximum voltages were produced using domestic wastewater (COD = 390 ± 89 mg L-1) with brush anodes (360 ± 63 mV, 1000 Ω) than woven carbon mesh anodes (200 ± 81 mV) with one or two separators. Maximum power densities were similar for brush anode reactors with one or two separators after 30 days (220 ± 1.2 and 240 ± 22 mW m-2), but with one separator the brush anode MFC power decreased to 130 ± 55 mW m-2 after 114 days. Power densities in MFCs with mesh anodes were very low (
Original languageEnglish (US)
Pages (from-to)8293-8300
Number of pages8
JournalJournal of Power Sources
Volume196
Issue number20
DOIs
StatePublished - Oct 2011
Externally publishedYes

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