AbstractThe 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.
CitationLanas V, Logan BE (2013) Evaluation of multi-brush anode systems in microbial fuel cells. Bioresource Technology 148: 379–385. Available: http://dx.doi.org/10.1016/j.biortech.2013.08.154.
SponsorsThe 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).
CollectionsPublications Acknowledging KAUST Support
- Graphite fiber brush anodes for increased power production in air-cathode microbial fuel cells.
- Authors: Logan B, Cheng S, Watson V, Estadt G
- Issue date: 2007 May 1
- Domestic wastewater treatment using multi-electrode continuous flow MFCs with a separator electrode assembly design.
- Authors: Ahn Y, Logan BE
- Issue date: 2013 Jan
- Impact of electrode configurations on retention time and domestic wastewater treatment efficiency using microbial fuel cells.
- Authors: Kim KY, Yang W, Logan BE
- Issue date: 2015 Sep 1
- Stability characterization and modeling of robust distributed benthic microbial fuel cell (DBMFC) system.
- Authors: Karra U, Huang G, Umaz R, Tenaglier C, Wang L, Li B
- Issue date: 2013 Sep
- Ion exchange membrane cathodes for scalable microbial fuel cells.
- Authors: Zuo Y, Cheng S, Logan BE
- Issue date: 2008 Sep 15