Increased Growth of a Hydrogenotrophic Methanogen in Co-Culture with a Cellulolytic Bacterium under Cathodic Electrochemical Regulation

Daisuke SASAKI; Masahiko MORITA; Kengo SASAKI; Atsushi WATANABE; Naoya OHMURA

doi:10.1271/bbb.120896

This article has now been updated. Please use the final version.

Increased Growth of a Hydrogenotrophic Methanogen in Co-Culture with a Cellulolytic Bacterium under Cathodic Electrochemical Regulation

Daisuke SASAKI, Masahiko MORITA, Kengo SASAKI, Atsushi WATANABE, Naoya OHMURA

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Keywords: bioelectrochemical system, cathodic reaction, cellulose degradation, hydrogenotrophic methanogen, cellulolytic bacterium

JOURNAL FREE ACCESS Advance online publication

Article ID: 120896

DOI https://doi.org/10.1271/bbb.120896

The final version of this article is now available: Vol. 77 (2013) , No. 5 p.1096

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Abstract

Bioelectrochemical (−0.8 V, −0.3 V, and +0.6 V vs. Ag/AgCl) and non-bioelectrochemical co-cultures of a hydrogenotrophic methanogen and a cellulolytic bacterium were conducted. Unlike non-bioelectrochemical co-cultures, a cathodic reaction (−0.8 V) increased the growth of the hydrogenotrophic methanogen and the cellulolytic bacterium, by 6.0- and 2.2-fold respectively, and increased cellulose degradation. In contrast, anodic reactions (−0.3 V, +0.6 V) influenced them negatively.

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