Effect of exogenous electron shuttles on growth and fermentative metabolism in Clostridium sp. BC1

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논문

Effect of exogenous electron shuttles on growth and fermentative metabolism in Clostridium sp. BC1

학술지

Bioresource technology : biomass, bioenergy, biowastes, conversion technologies, biotransformations, production technologies

저자명

Yarlagadda, V.N.; Gupta, A.; Dodge, C.J.; Francis, A.J.

초록

In this study, the influence exogenous electron shuttles on the growth and glucose fermentative metabolism of Clostridium sp. BC1 was investigated. Bicarbonate addition to mineral salts (MS) medium accelerated growth and glucose fermentation which shifted acidogenesis (acetic- and butyric-acids) towards solventogenesis (ethanol and butanol). Addition of ferrihydrite, anthraquinone disulfonate, and nicotinamide adenine dinucleotide in bicarbonate to growing culture showed no significant influence on fermentative metabolism. In contrast, methyl viologen (MV) enhanced ethanol- and butanol-production by 28- and 12-fold, respectively with concomitant decrease in hydrogen, acetic- and butyric-acids compared to MS medium. The results show that MV addition affects hydrogenase activity with a significant reduction in hydrogen production and a shift in the direction of electron flow towards enhanced production of ethanol and butanol.

발행연도

2012

발행기관

Elsevier Applied Science

ISSN

0960-8524

권

108

페이지

pp.295-299

DOI

10.1016/j.biortech.2011.12.040