Evaluation of multi-brush anode systems in microbial fuel cells

Vanessa Lanas, Bruce E. Logan

Research output: Contribution to journalArticlepeer-review

52 Scopus citations

Abstract

The packing density of anodes in microbial fuel cells (MFCs) was examined here using four different graphite fiber brush anode configurations. The impact of anodes on performance was studied in terms of carbon fiber length (brush diameter), the number of brushes connected in parallel, and the wire current collector gage. MFCs with different numbers of brushes (one, three or six) set perpendicular to the cathode all produced similar power densities (1200±40mW/m2) and coulombic efficiencies (60%±5%). Reducing the number of brushes by either disconnecting or removing them reduced power, demonstrating the importance of anode projected area covering the cathode, and therefore the need to match electrode projected areas to maintain high performance. Multi-brush reactors had the same COD removal as single-brush systems (90%). The use of smaller Ti wire gages did not affect power generation, which will enable the use of less metal, reducing material costs. © 2013 Elsevier Ltd.
Original languageEnglish (US)
Pages (from-to)379-385
Number of pages7
JournalBioresource Technology
Volume148
DOIs
StatePublished - Nov 2013
Externally publishedYes

Bibliographical note

KAUST Repository Item: Exported on 2020-10-01
Acknowledgements: The research reported here was financially supported by the King Abdullah University of Science and Technology in Saudi Arabia, and by the Strategic Environmental Research and Development Program (SERDP).
This publication acknowledges KAUST support, but has no KAUST affiliated authors.

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