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

Handle URI:
http://hdl.handle.net/10754/599166
Title:
Performance of two different types of anodes in membrane electrode assembly microbial fuel cells for power generation from domestic wastewater
Authors:
Hays, Sarah; Zhang, Fang; Logan, Bruce E.
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 (<45 mW m-2). Brush anodes MFCs had higher COD removals (80 ± 3%) than carbon mesh MFCs (58 ± 7%), but similar Coulombic efficiencies (8.6 ± 2.9% brush; 7.8 ± 7.1% mesh). These results show that compact (hemispherical) brush anodes can produce higher power and more effective domestic wastewater treatment than flat mesh anodes in MFCs. © 2011 Elsevier B.V. All rights reserved.
Citation:
Hays S, Zhang F, Logan BE (2011) Performance of two different types of anodes in membrane electrode assembly microbial fuel cells for power generation from domestic wastewater. Journal of Power Sources 196: 8293–8300. Available: http://dx.doi.org/10.1016/j.jpowsour.2011.06.027.
Publisher:
Elsevier BV
Journal:
Journal of Power Sources
KAUST Grant Number:
KUS-I1-003-13
Issue Date:
Oct-2011
DOI:
10.1016/j.jpowsour.2011.06.027
Type:
Article
ISSN:
0378-7753
Sponsors:
We thank Deepak Pant and VITO, the Flemish Institute for Technological Research, for donating the AC cathodes used in this study. This research was supported by the King Abdullah University of Science and Technology (KAUST) (Award KUS-I1-003-13).
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Publications Acknowledging KAUST Support

Full metadata record

DC FieldValue Language
dc.contributor.authorHays, Sarahen
dc.contributor.authorZhang, Fangen
dc.contributor.authorLogan, Bruce E.en
dc.date.accessioned2016-02-25T13:54:08Zen
dc.date.available2016-02-25T13:54:08Zen
dc.date.issued2011-10en
dc.identifier.citationHays S, Zhang F, Logan BE (2011) Performance of two different types of anodes in membrane electrode assembly microbial fuel cells for power generation from domestic wastewater. Journal of Power Sources 196: 8293–8300. Available: http://dx.doi.org/10.1016/j.jpowsour.2011.06.027.en
dc.identifier.issn0378-7753en
dc.identifier.doi10.1016/j.jpowsour.2011.06.027en
dc.identifier.urihttp://hdl.handle.net/10754/599166en
dc.description.abstractGraphite 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 (<45 mW m-2). Brush anodes MFCs had higher COD removals (80 ± 3%) than carbon mesh MFCs (58 ± 7%), but similar Coulombic efficiencies (8.6 ± 2.9% brush; 7.8 ± 7.1% mesh). These results show that compact (hemispherical) brush anodes can produce higher power and more effective domestic wastewater treatment than flat mesh anodes in MFCs. © 2011 Elsevier B.V. All rights reserved.en
dc.description.sponsorshipWe thank Deepak Pant and VITO, the Flemish Institute for Technological Research, for donating the AC cathodes used in this study. This research was supported by the King Abdullah University of Science and Technology (KAUST) (Award KUS-I1-003-13).en
dc.publisherElsevier BVen
dc.subjectCarbon mesh anodeen
dc.subjectMembrane electrode assemblyen
dc.subjectMicrobial fuel cellen
dc.titlePerformance of two different types of anodes in membrane electrode assembly microbial fuel cells for power generation from domestic wastewateren
dc.typeArticleen
dc.identifier.journalJournal of Power Sourcesen
dc.contributor.institutionPennsylvania State University, State College, United Statesen
kaust.grant.numberKUS-I1-003-13en
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