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Towards a hybrid anaerobic digester-microbial fuel cell integrated energy recovery system: An overview of the development of an electrogenic biofilm

Paper ID Volume ID Publish Year Pages File Format Full-Text
17093 42640 2013 8 PDF Available
Title
Towards a hybrid anaerobic digester-microbial fuel cell integrated energy recovery system: An overview of the development of an electrogenic biofilm
Abstract

•We develop an electrogenic biofilm using the effluent of an anaerobic digester as both substrate and bacterial source.•We correlate the development of the electrogenic biofilm with improved current density.•We visualize the direct bacterial nanowire interaction with the carbon nanotube electrode using SEM.•We show selectivity of the poised potential electrode for electrogenic bacteria.

An electrogenic biofilm was developed on a macroporous chitosan-carbon nanotube (CHIT-CNT) electrode under constant poised potential (−0.25 V versus Ag/AgCl reference electrode) and flow through conditions utilizing the effluent of an anaerobic digester as both the inoculant and substrate for the electrogenic biofilm. After 125 days of inoculation the bioelectrode demonstrated an open circuit potential of −0.62 V and a current density of 9.43 μA cm−3 (at −0.25 V). Scanning electron microscopy images indicate thorough surface coverage of the biofilm with a high density of bacterial nanowires physically connecting bacteria to bacteria and bacteria to carbon nanotube (electrode surface) suggesting the nanowires are electrically conductive. DGGE was used to identify the major bacterial and archaeal populations.

Keywords
Electrogenic biofilm; Bacterial nanowires; Hybrid anaerobic-microbial fuel cell
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Towards a hybrid anaerobic digester-microbial fuel cell integrated energy recovery system: An overview of the development of an electrogenic biofilm
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Publisher
Database: Elsevier - ScienceDirect
Journal: Enzyme and Microbial Technology - Volume 52, Issues 6–7, 10 May 2013, Pages 344–351
Authors
, , , , ,
Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us