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Title: Electricity generation by Pyrococcus furiosus in microbial fuel cells operated at 90°C

Journal Article · · Biotechnology and Bioengineering
DOI:https://doi.org/10.1002/bit.26271· OSTI ID:1401277
ORCiD logo [1];  [2];  [2];  [1]
  1. Nano Electrochemistry Laboratory, College of Engineering University of Georgia Athens Georgia 30602
  2. Department of Biochemistry and Molecular Biology University of Georgia Athens Georgia 30602

ABSTRACT Hyperthermophiles are microorganisms that thrive in extremely hot environments with temperatures near and even above 100°C. They are the most deeply rooted microorganisms on phylogenetic trees suggesting they may have evolved to survive in the early hostile earth. The simple respiratory systems of some of these hyperthermophiles make them potential candidates to develop microbial fuel cells (MFC) that can generate power at temperatures approaching the boiling point. We explored extracellular electron transfer in the hyperthermophilic archaeon Pyrococcus furiosus ( Pf ) by studying its ability to generate electricity in a two‐chamber MFC. Pf growing in defined medium functioned as an anolyte in a MFC operated at 90°C, generating a maximum current density of 2 A m −2 and a peak power density of 225 mW m −2 without the addition of any external redox mediator. Electron microscopy and electrochemical impedance spectroscopy of the anode with the attached Pf biofilm demonstrated bio‐electrochemical behavior that led to electricity generation in the MFC via direct electron transfer. This proof of concept study reveals for the first time that a hyperthermophile such as Pf can generate electricity in MFC at extreme temperatures. Biotechnol. Bioeng. 2017;114: 1419–1427. © 2017 Wiley Periodicals, Inc.

Sponsoring Organization:
USDOE
Grant/Contract Number:
DE‐FG05‐95ER20175
OSTI ID:
1401277
Journal Information:
Biotechnology and Bioengineering, Journal Name: Biotechnology and Bioengineering Vol. 114 Journal Issue: 7; ISSN 0006-3592
Publisher:
Wiley Blackwell (John Wiley & Sons)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 17 works
Citation information provided by
Web of Science

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