Effects of carbon brush anode size and loading on microbial fuel cell performance in batch and continuous mode

Handle URI:
http://hdl.handle.net/10754/598070
Title:
Effects of carbon brush anode size and loading on microbial fuel cell performance in batch and continuous mode
Authors:
Lanas, Vanessa; Ahn, Yongtae; Logan, Bruce E.
Abstract:
Larger scale microbial fuel cells (MFCs) require compact architectures to efficiently treat wastewater. We examined how anode-brush diameter, number of anodes, and electrode spacing affected the performance of the MFCs operated in fed-batch and continuous flow mode. All anodes were initially tested with the brush core set at the same distance from the cathode. In fed-batch mode, the configuration with three larger brushes (25 mm diameter) produced 80% more power (1240 mW m-2) than reactors with eight smaller brushes (8 mm) (690 mW m-2). The higher power production by the larger brushes was due to more negative and stable anode potentials than the smaller brushes. The same general result was obtained in continuous flow operation, although power densities were reduced. However, by moving the center of the smaller brushes closer to the cathode (from 16.5 to 8 mm), power substantially increased from 690 to 1030 mW m-2 in fed batch mode. In continuous flow mode, power increased from 280 to 1020 mW m-2, resulting in more power production from the smaller brushes than the larger brushes (540 mW m-2). These results show that multi-electrode MFCs can be optimized by selecting smaller anodes, placed as close as possible to the cathode. © 2013 Elsevier B.V. All rights reserved.
Citation:
Lanas V, Ahn Y, Logan BE (2014) Effects of carbon brush anode size and loading on microbial fuel cell performance in batch and continuous mode. Journal of Power Sources 247: 228–234. Available: http://dx.doi.org/10.1016/j.jpowsour.2013.08.110.
Publisher:
Elsevier BV
Journal:
Journal of Power Sources
Issue Date:
Feb-2014
DOI:
10.1016/j.jpowsour.2013.08.110
Type:
Article
ISSN:
0378-7753
Sponsors:
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).
Appears in Collections:
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Full metadata record

DC FieldValue Language
dc.contributor.authorLanas, Vanessaen
dc.contributor.authorAhn, Yongtaeen
dc.contributor.authorLogan, Bruce E.en
dc.date.accessioned2016-02-25T13:12:05Zen
dc.date.available2016-02-25T13:12:05Zen
dc.date.issued2014-02en
dc.identifier.citationLanas V, Ahn Y, Logan BE (2014) Effects of carbon brush anode size and loading on microbial fuel cell performance in batch and continuous mode. Journal of Power Sources 247: 228–234. Available: http://dx.doi.org/10.1016/j.jpowsour.2013.08.110.en
dc.identifier.issn0378-7753en
dc.identifier.doi10.1016/j.jpowsour.2013.08.110en
dc.identifier.urihttp://hdl.handle.net/10754/598070en
dc.description.abstractLarger scale microbial fuel cells (MFCs) require compact architectures to efficiently treat wastewater. We examined how anode-brush diameter, number of anodes, and electrode spacing affected the performance of the MFCs operated in fed-batch and continuous flow mode. All anodes were initially tested with the brush core set at the same distance from the cathode. In fed-batch mode, the configuration with three larger brushes (25 mm diameter) produced 80% more power (1240 mW m-2) than reactors with eight smaller brushes (8 mm) (690 mW m-2). The higher power production by the larger brushes was due to more negative and stable anode potentials than the smaller brushes. The same general result was obtained in continuous flow operation, although power densities were reduced. However, by moving the center of the smaller brushes closer to the cathode (from 16.5 to 8 mm), power substantially increased from 690 to 1030 mW m-2 in fed batch mode. In continuous flow mode, power increased from 280 to 1020 mW m-2, resulting in more power production from the smaller brushes than the larger brushes (540 mW m-2). These results show that multi-electrode MFCs can be optimized by selecting smaller anodes, placed as close as possible to the cathode. © 2013 Elsevier B.V. All rights reserved.en
dc.description.sponsorshipThe 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).en
dc.publisherElsevier BVen
dc.subjectCarbon brush anodeen
dc.subjectContinuous flowen
dc.subjectDiameteren
dc.subjectElectrode distanceen
dc.subjectMicrobial fuel cellen
dc.titleEffects of carbon brush anode size and loading on microbial fuel cell performance in batch and continuous modeen
dc.typeArticleen
dc.identifier.journalJournal of Power Sourcesen
dc.contributor.institutionPennsylvania State University, State College, United Statesen
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