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AuthorSevda, S.
AuthorChayambuka, K.
AuthorSreekrishnan, T.R.
AuthorPant, D.
AuthorDominguez-Benetton, X.
Available date2015-12-15T06:52:46Z
Publication Date2015-12
Publication NameBioelectrochemistry
ResourceScopus
Identifierhttp://dx.doi.org/10.1016/j.bioelechem.2015.04.008
CitationSevda, Surajbhan et al. "A comprehensive impedance journey to continuous microbial fuel cells", Bioelectrochemistry, Volume 106, Part A, December 2015, Pages 159-166. Available online April 2015.
ISSN1567-5394
URIhttp://hdl.handle.net/10576/3947
AbstractThe aim of the present work was to characterize the impedance response of an air-cathode MFC operating in a continuous mode and to determine intrinsic properties that define its performance which are crucial to be controlled for scalability purposes. The limiting step on electricity generation is the anodic electrochemically-active biofilm, independently of the external resistance, R<inf>ext</inf>, utilized. However, for R<inf>ext</inf> below 3k? the internal impedance of the bioanode remained invariable, in good correspondence to the power density profile. The hydraulic retention time (HRT) had an effect on the impedance of both the bioanode and the air-cathode and especially on the overall MFC. The lowest HRT at which the MFC was operable was 3h. Yet, the variation on the HRT did not have a significant impact on power generation. A two constant phase element-model was associated with the EIS response of both bioanode and air-cathode, respectively. Consistency was found between the CPE behaviour and the normal power-law distribution of local resistivity with a uniform dielectric constant, which represented consistent values with the electrical double layer, the Nernst diffusion layer and presumably the biofilm thickness. These results have future implications on MFC monitoring and control, as well as in providing critical parameters for scale-up.
SponsorGrant 180B12A7 from the Environmental and Energy Technology Innovation Platform (MIP2), under the project �Sewage Plus: second life of sewage as a matrix for dilution of organic waste streams�. Surajbhan Sevda gratefully acknowledges a scholarship from the Flemish Government, Department of Higher Education and Scientific Research (Vlaamse Gemeenschap) under the framework of Indo-Belgium fellowship (Academic year 2011�2012)
Languageen
PublisherElsevier
SubjectAir-cathode MFC
Electrochemical impedance spectroscopy
External resistance
Hydraulic retention time
Power density
TitleA comprehensive impedance journey to continuous microbial fuel cells
TypeArticle
Pagination159-166
Volume Number106


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