Time-course correlation of biofilm properties and electrochemical performance in single-chamber microbial fuel cells
Ramasamy, Ramaraja P.
Cloud-Owen, Susan Red
Mench, Matthew M.
Regan, John M.
KAUST Grant NumberKUS-I1-003-13
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AbstractThe relationship between anode microbial characteristics and electrochemical parameters in microbial fuel cells (MFCs) was analyzed by time-course sampling of parallel single-bottle MFCs operated under identical conditions. While voltage stabilized within 4. days, anode biofilms continued growing during the six-week operation. Viable cell density increased asymptotically, but membrane-compromised cells accumulated steadily from only 9% of total cells on day 3 to 52% at 6. weeks. Electrochemical performance followed the viable cell trend, with a positive correlation for power density and an inverse correlation for anode charge transfer resistance. The biofilm architecture shifted from rod-shaped, dispersed cells to more filamentous structures, with the continuous detection of Geobacter sulfurreducens-like 16S rRNA fragments throughout operation and the emergence of a community member related to a known phenazine-producing Pseudomonas species. A drop in cathode open circuit potential between weeks two and three suggested that uncontrolled biofilm growth on the cathode deleteriously affects system performance. © 2010 Elsevier Ltd.
CitationRen Z, Ramasamy RP, Cloud-Owen SR, Yan H, Mench MM, et al. (2011) Time-course correlation of biofilm properties and electrochemical performance in single-chamber microbial fuel cells. Bioresource Technology 102: 416–421. Available: http://dx.doi.org/10.1016/j.biortech.2010.06.003.
SponsorsThis research was supported by National Science Foundation Grant CBET-0834033, a seed grant from the MRSEC program at Penn State (National Science Foundation Grant DMR-0820404), and Award KUS-I1-003-13 from the King Abdullah University of Science and Technology (KAUST).
CollectionsPublications Acknowledging KAUST Support
- Comparison of anode bacterial communities and performance in microbial fuel cells with different electron donors.
- Authors: Jung S, Regan JM
- Issue date: 2007 Nov
- Effect of formation of biofilms and chemical scale on the cathode electrode on the performance of a continuous two-chamber microbial fuel cell.
- Authors: Chung K, Fujiki I, Okabe S
- Issue date: 2011 Jan
- Impact of initial biofilm growth on the anode impedance of microbial fuel cells.
- Authors: Ramasamy RP, Ren Z, Mench MM, Regan JM
- Issue date: 2008 Sep 1
- Power output and columbic efficiencies from biofilms of Geobacter sulfurreducens comparable to mixed community microbial fuel cells.
- Authors: Nevin KP, Richter H, Covalla SF, Johnson JP, Woodard TL, Orloff AL, Jia H, Zhang M, Lovley DR
- Issue date: 2008 Oct
- Characterization of microbial fuel cells at microbially and electrochemically meaningful time scales.
- Authors: Ren Z, Yan H, Wang W, Mench MM, Regan JM
- Issue date: 2011 Mar 15