Document Detail

A new approach for in situ cyclic voltammetry of a microbial fuel cell biofilm without using a potentiostat.
MedLine Citation:
PMID:  19019740     Owner:  NLM     Status:  MEDLINE    
Electrochemically active bacteria in a microbial fuel cell (MFC) usually exist as a biofilm attached to an electrode surface. Conventional cyclic voltammetry using potentiostat is considered as a powerful and reliable method to study electrochemical behavior of MFC biofilm. In this paper, we introduce a new approach to evaluate redox behavior of an electro-active MFC biofilm without using a potentiostat. Analogous to a conventional cyclic voltammetry study, we controlled the biofilm-electrode potential by computer-feedback controlling the external resistance of an operating MFC. In this way, the MFC can still operate as a "fuel cell" without being "interrupted" by an external device (i.e. potentiostat) that normally does not belong to the system. Relationship between current and biofilm-electrode potential was obtained and showed agreement with a potentiostat-controlled method under similar experimental conditions. The method could be added to our technical repertoire for analysis of bacterial mediator involved in the exocellular electron transfer of a MFC-biofilm, and it could potentially serve as a practical process monitoring method for MFC operation. The application of computer-control components should be further explored to facilitate control, diagnosis as well as optimization of MFC processes.
Ka Yu Cheng; Ralf Cord-Ruwisch; Goen Ho
Publication Detail:
Type:  Journal Article     Date:  2008-11-05
Journal Detail:
Title:  Bioelectrochemistry (Amsterdam, Netherlands)     Volume:  74     ISSN:  1878-562X     ISO Abbreviation:  Bioelectrochemistry     Publication Date:  2009 Feb 
Date Detail:
Created Date:  2009-01-26     Completed Date:  2009-03-23     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  100953583     Medline TA:  Bioelectrochemistry     Country:  Netherlands    
Other Details:
Languages:  eng     Pagination:  227-31     Citation Subset:  IM    
Faculty of Sustainability, Environment and Life Sciences, Murdoch University, WA 6150, Australia.
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MeSH Terms
Bioelectric Energy Sources*
Electrochemistry / instrumentation
Equipment Design

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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