Indole oxidation enhances electricity production in an E-coli-catalyzed microbial fuel cell

Title
Indole oxidation enhances electricity production in an E-coli-catalyzed microbial fuel cell
Author(s)
이진태조무환한티힙
Keywords
ESCHERICHIA-COLI; ELECTRON-TRANSFER; GENERATION; MICROORGANISMS; SIGNAL; K-12
Issue Date
201402
Publisher
KOREAN SOC BIOTECHNOLOGY & BIOENGINEERING
Citation
BIOTECHNOLOGY AND BIOPROCESS ENGINEERING, v.19, no.1, pp.126 - 131
Abstract
Microbial fuel cells (MFCs) generate electricity from the oxidation of dissolved organic matter. A variety of Gram-positive and Gram-negative bacteria, including Escherichia coli, produce a large quantity of indole, which functions as an extracellular signal molecule. This work explored the role of indole in a mediatorless E. coli catalyzed MFC. Although the presence of indole alone did not affect power generation, indole oxidation by the indole-oxidizing enzyme toluene-o-monooxygenase (TOM) enhanced power density by 9-fold. Open circuit voltage and polarization curve showed that indole oxidation by TOM produced a maximum power density of 5.4 mW/m(2) at 1,000 ohm. Cyclic voltammetric results suggested that indole oxidation resulted in the production of redox compounds. This study provides a novel means of enhancing power generation in E. coli-catalyzed MFCs.
URI
http://hdl.handle.net/YU.REPOSITORY/33282http://dx.doi.org/10.1007/s12257-013-0429-7
ISSN
1226-8372
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공과대학 > 화학공학부 > Articles
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