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dc.contributor.authorYan, Hengjing
dc.contributor.authorSaito, Tomonori
dc.contributor.authorRegan, John M.
dc.date.accessioned2016-02-25T13:50:28Z
dc.date.available2016-02-25T13:50:28Z
dc.date.issued2012-05
dc.identifier.citationYan H, Saito T, Regan JM (2012) Nitrogen removal in a single-chamber microbial fuel cell with nitrifying biofilm enriched at the air cathode. Water Research 46: 2215–2224. Available: http://dx.doi.org/10.1016/j.watres.2012.01.050.
dc.identifier.issn0043-1354
dc.identifier.pmid22386083
dc.identifier.doi10.1016/j.watres.2012.01.050
dc.identifier.urihttp://hdl.handle.net/10754/598977
dc.description.abstractNitrogen removal is needed in microbial fuel cells (MFCs) for the treatment of most waste streams. Current designs couple biological denitrification with side-stream or combined nitrification sustained by upstream or direct aeration, which negates some of the energy-saving benefits of MFC technology. To achieve simultaneous nitrification and denitrification, without extra energy input for aeration, the air cathode of a single-chamber MFC was pre-enriched with a nitrifying biofilm. Diethylamine-functionalized polymer (DEA) was used as the Pt catalyst binder on the cathode to improve the differential nitrifying biofilm establishment. With pre-enriched nitrifying biofilm, MFCs with the DEA binder had an ammonia removal efficiency of up to 96.8% and a maximum power density of 900 ± 25 mW/m 2, compared to 90.7% and 945 ± 42 mW/m 2 with a Nafion binder. A control with Nafion that lacked nitrifier pre-enrichment removed less ammonia and had lower power production (54.5% initially, 750 mW/m 2). The nitrifying biofilm MFCs had lower Coulombic efficiencies (up to 27%) than the control reactor (up to 36%). The maximum total nitrogen removal efficiency reached 93.9% for MFCs with the DEA binder. The DEA binder accelerated nitrifier biofilm enrichment on the cathode, and enhanced system stability. These results demonstrated that with proper cathode pre-enrichment it is possible to simultaneously remove organics and ammonia in a single-chamber MFC without supplemental aeration. © 2012 Elsevier Ltd.
dc.description.sponsorshipThis research was supported by Award KUS-I1-003-13 from the King Abdullah University of Science and Technology (KAUST).
dc.publisherElsevier BV
dc.subjectAir cathode
dc.subjectCathode biofilm
dc.subjectDenitrification
dc.subjectNitrification
dc.titleNitrogen removal in a single-chamber microbial fuel cell with nitrifying biofilm enriched at the air cathode
dc.typeArticle
dc.identifier.journalWater Research
dc.contributor.institutionPennsylvania State University, State College, United States
dc.contributor.institutionOak Ridge National Laboratory, Oak Ridge, United States
kaust.grant.numberKUS-I1-003-13


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