Electron fluxes in a microbial fuel cell performing carbon and nitrogen removal

Virdis, Bernardino, Rabaey, Korneel, Yuan, Zhiguo, Rozendal, Rene A. and Keller, Jurg (2009) Electron fluxes in a microbial fuel cell performing carbon and nitrogen removal. Environmental Science and Technology, 43 13: 5144-5149. doi:10.1021/es8036302


Author Virdis, Bernardino
Rabaey, Korneel
Yuan, Zhiguo
Rozendal, Rene A.
Keller, Jurg
Title Electron fluxes in a microbial fuel cell performing carbon and nitrogen removal
Journal name Environmental Science and Technology   Check publisher's open access policy
ISSN 0013-936X
Publication date 2009-07-01
Year available 2009
Sub-type Article (original research)
DOI 10.1021/es8036302
Open Access Status DOI
Volume 43
Issue 13
Start page 5144
End page 5149
Total pages 6
Editor Jerald Schnoor
Place of publication Washington, D.C., U.S.
Publisher American Chemical Society
Language eng
Subject C1
Abstract The electron recovery in microbial fuel cells (MFCs) is decreased by processes like methanogenesis, bacterial growth, and the accumulation of intermediates. Using a suite of analytical techniques, including electrochemical monitoring, chemical analysis, microsensor analysis, and Titration and Off-Gas Analysis (TOGA), this study aimed to (a) identify and quantify the electron losses occurring at the anode and the cathode of a MFC removing acetate and nitrate (NO3−), respectively, and (b) to investigate the impact of the operational characteristics of the cathode on the denitrification process. Our results show that methane (CH4) production and estimated biomass formation at the anode and nitrous oxide (N2O) accumulation at the cathode were responsible for the reduction of Coulombic efficiency (ε) during continuous feeding conditions. At the anode, up to 40.1% of the acetate consumed was released as methane at closed circuit. At the cathode, N2O accumulation represented instead the main loss accounting for up to 10.0 ± 2.1% of the oxidation capacity of the electron acceptor provided as NO3−. Batch experiments at controlled potentials and currents revealed that for a given current the fraction of electron transferred and released as N2O is significantly reduced by low cathodic potentials.
Keyword Engineering, Environmental
Environmental Sciences
Engineering
Environmental Sciences & Ecology
ENGINEERING, ENVIRONMENTAL
ENVIRONMENTAL SCIENCES
Q-Index Code C1
Q-Index Status Confirmed Code
Grant ID DP0666927
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: 2010 Higher Education Research Data Collection
Advanced Water Management Centre Publications
 
Versions
Version Filter Type
Citation counts: TR Web of Science Citation Count  Cited 78 times in Thomson Reuters Web of Science Article | Citations
Scopus Citation Count Cited 89 times in Scopus Article | Citations
Google Scholar Search Google Scholar
Created: Thu, 03 Sep 2009, 17:48:06 EST by Mr Andrew Martlew on behalf of Advanced Water Management Centre