COD removal characteristics in air-cathode microbial fuel cells

Handle URI:
http://hdl.handle.net/10754/597792
Title:
COD removal characteristics in air-cathode microbial fuel cells
Authors:
Zhang, Xiaoyuan; He, Weihua; Ren, Lijiao; Stager, Jennifer; Evans, Patrick J.; Logan, Bruce E.
Abstract:
© 2014 Elsevier Ltd. Exoelectrogenic microorganisms in microbial fuel cells (MFCs) compete with other microorganisms for substrate. In order to understand how this affects removal rates, current generation, and coulombic efficiencies (CEs), substrate removal rates were compared in MFCs fed a single, readily biodegradable compound (acetate) or domestic wastewater (WW). Removal rates based on initial test conditions fit first-order kinetics, but rate constants varied with circuit resistance. With filtered WW (100Ω), the rate constant was 0.18h- 1, which was higher than acetate or filtered WW with an open circuit (0.10h- 1), but CEs were much lower (15-24%) than acetate. With raw WW (100Ω), COD removal proceeded in two stages: a fast removal stage with high current production, followed by a slower removal with little current. While using MFCs increased COD removal rate due to current generation, secondary processes will be needed to reduce COD to levels suitable for discharge.
Citation:
Zhang X, He W, Ren L, Stager J, Evans PJ, et al. (2015) COD removal characteristics in air-cathode microbial fuel cells. Bioresource Technology 176: 23–31. Available: http://dx.doi.org/10.1016/j.biortech.2014.11.001.
Publisher:
Elsevier BV
Journal:
Bioresource Technology
KAUST Grant Number:
KUS-I1-003-13
Issue Date:
Jan-2015
DOI:
10.1016/j.biortech.2014.11.001
PubMed ID:
25460980
Type:
Article
ISSN:
0960-8524
Sponsors:
The authors thank David Jones for laboratory support and Mark Ullery for discussions on domestic wastewater COD removal rates. This research was supported by Strategic Environmental Research and Development Program (SERDP), Award KUS-I1-003-13 from the King Abdullah University of Science and Technology (KAUST) and National Natural Science Foundation of China (Grant No. 51408336).
Appears in Collections:
Publications Acknowledging KAUST Support

Full metadata record

DC FieldValue Language
dc.contributor.authorZhang, Xiaoyuanen
dc.contributor.authorHe, Weihuaen
dc.contributor.authorRen, Lijiaoen
dc.contributor.authorStager, Jenniferen
dc.contributor.authorEvans, Patrick J.en
dc.contributor.authorLogan, Bruce E.en
dc.date.accessioned2016-02-25T12:56:48Zen
dc.date.available2016-02-25T12:56:48Zen
dc.date.issued2015-01en
dc.identifier.citationZhang X, He W, Ren L, Stager J, Evans PJ, et al. (2015) COD removal characteristics in air-cathode microbial fuel cells. Bioresource Technology 176: 23–31. Available: http://dx.doi.org/10.1016/j.biortech.2014.11.001.en
dc.identifier.issn0960-8524en
dc.identifier.pmid25460980en
dc.identifier.doi10.1016/j.biortech.2014.11.001en
dc.identifier.urihttp://hdl.handle.net/10754/597792en
dc.description.abstract© 2014 Elsevier Ltd. Exoelectrogenic microorganisms in microbial fuel cells (MFCs) compete with other microorganisms for substrate. In order to understand how this affects removal rates, current generation, and coulombic efficiencies (CEs), substrate removal rates were compared in MFCs fed a single, readily biodegradable compound (acetate) or domestic wastewater (WW). Removal rates based on initial test conditions fit first-order kinetics, but rate constants varied with circuit resistance. With filtered WW (100Ω), the rate constant was 0.18h- 1, which was higher than acetate or filtered WW with an open circuit (0.10h- 1), but CEs were much lower (15-24%) than acetate. With raw WW (100Ω), COD removal proceeded in two stages: a fast removal stage with high current production, followed by a slower removal with little current. While using MFCs increased COD removal rate due to current generation, secondary processes will be needed to reduce COD to levels suitable for discharge.en
dc.description.sponsorshipThe authors thank David Jones for laboratory support and Mark Ullery for discussions on domestic wastewater COD removal rates. This research was supported by Strategic Environmental Research and Development Program (SERDP), Award KUS-I1-003-13 from the King Abdullah University of Science and Technology (KAUST) and National Natural Science Foundation of China (Grant No. 51408336).en
dc.publisherElsevier BVen
dc.subjectCOD removal rateen
dc.subjectCoulombic efficiencyen
dc.subjectDomestic wastewateren
dc.subjectFirst-order reactionen
dc.subjectMicrobial fuel cellen
dc.titleCOD removal characteristics in air-cathode microbial fuel cellsen
dc.typeArticleen
dc.identifier.journalBioresource Technologyen
dc.contributor.institutionTsinghua University, Beijing, Chinaen
dc.contributor.institutionPennsylvania State University, State College, United Statesen
dc.contributor.institutionHarbin Institute of Technology, Harbin, Chinaen
dc.contributor.institutionCDM, Cambridge, United Statesen
kaust.grant.numberKUS-I1-003-13en
All Items in KAUST are protected by copyright, with all rights reserved, unless otherwise indicated.