Bioelectrochemical analysis of a hyperthermophilic microbial fuel cell generating electricity at temperatures above 80 °C

Bioscience, Biotechnology, and Biochemistry
Qian FuHajime Kobayashi

Abstract

We examined whether a hyperthermophilic microbial fuel cell (MFC) would be technically feasible. Two-chamber MFC reactors were inoculated with subsurface microorganisms indigenous to formation water from a petroleum reservoir and were started up at operating temperature 80 °C. The MFC generated a maximum current of 1.3 mA 45 h after the inoculation. Performance of the MFC improved with an increase in the operating temperature; the best performance was achieved at 95 °C with the maximum power density of 165 mWm(-2), which was approximately fourfold higher than that at 75 °C. Thus, to our knowledge, our study is the first to demonstrate generation of electricity in a hyperthermophilic MFC (operating temperature as high as 95 °C). Scanning electron microscopy showed that filamentous microbial cells were attached on the anode surface. The anodic microbial consortium showed limited phylogenetic diversity and primarily consisted of hyperthermophilic bacteria closely related to Caldanaerobacter subterraneus and Thermodesulfobacterium commune.

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Citations

Jul 21, 2015·Bioresource Technology·Lucinda Elizabeth Doyle, Enrico Marsili
Feb 22, 2017·Biotechnology and Bioengineering·Narendran SekarRamaraja P Ramasamy
Feb 13, 2018·Bioresource Technology·Namita ShresthaVenkataramana Gadhamshetty
Jun 25, 2021·Environmental Science and Pollution Research International·Priya MukherjeeMin Jang

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Datasets Mentioned

BETA
KC491218
KC491220

Methods Mentioned

BETA
scanning electron microscopy
PCR

Software Mentioned

MEGA
Infernal

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