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Extracellular electron transfer from cathode to microbes: application for biofuel production

Title
Extracellular electron transfer from cathode to microbes: application for biofuel production
Author
최옥경
Keywords
Bioelectrochemical synthesis; Extracellular electron transfer; Cathodic electron; Electrofuel
Issue Date
2016-01
Publisher
BIOMED CENTRAL LTD
Citation
BIOTECHNOLOGY FOR BIOFUELS, v. 9, Article number 11, Page. 11-24
Abstract
Extracellular electron transfer in microorganisms has been applied for bioelectrochemical synthesis utilizing microbes to catalyze anodic and/or cathodic biochemical reactions. Anodic reactions (electron transfer from microbe to anode) are used for current production and cathodic reactions (electron transfer from cathode to microbe) have recently been applied for current consumption for valuable biochemical production. The extensively studied exoelectrogenic bacteria Shewanella and Geobacter showed that both directions for electron transfer would be possible. It was proposed that gram-positive bacteria, in the absence of cytochrome C, would accept electrons using a cascade of membrane-bound complexes such as membrane-bound Fe-S proteins, oxidoreductase, and periplasmic enzymes. Modification of the cathode with the addition of positive charged species such as chitosan or with an increase of the interfacial area using a porous three-dimensional scaffold electrode led to increased current consumption. The extracellular electron transfer from the cathode to the microbe could catalyze various bioelectrochemical reductions. Electrofermentation used electrons from the cathode as reducing power to produce more reduced compounds such as alcohols than acids, shifting the metabolic pathway. Electrofuel could be generated through artificial photosynthesis using electrical energy instead of solar energy in the process of carbon fixation.
URI
https://biotechnologyforbiofuels.biomedcentral.com/articles/10.1186/s13068-016-0426-0http://hdl.handle.net/20.500.11754/30585
ISSN
1754-6834
DOI
10.1186/s13068-016-0426-0
Appears in Collections:
RESEARCH INSTITUTE[S](부설연구소) > ETC
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