Efficient carbon dioxide utilization and simultaneous hydrogen enrichment from off-gas of acetone-butanol-ethanol fermentation by succinic acid producing Escherichia coli

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논문

Efficient carbon dioxide utilization and simultaneous hydrogen enrichment from off-gas of acetone-butanol-ethanol fermentation by succinic acid producing Escherichia coli

학술지

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

저자명

He, Aiyong; Kong, Xiangping; Wang, Chao; Wu, Hao; Jiang, Min; Ma, Jiangfeng; Ouyang, Pingkai

초록

Abstract The off-gas from acetone–butanol–ethanol (ABE) fermentation was firstly used to be CO2 source (co-substrate) for succinic acid production. The optimum ratio of H2/CO2 indicated higher CO2 partial pressures with presence of H2 could enhance C4 pathway flux and reductive product productivity. Moreover, when an inner recycling bioreactor was used for CO2 recycling at a high total pressure (0.2Mpa), a maximum succinic acid concentration of 65.7g·L−1 was obtained, and a productivity of 0.76g·L−1·h−1 and a high yield of 0.86g·g−1 glucose were achieved. Furthermore, the hydrogen content was simultaneously enriched to 92.7%. These results showed one successful attempt to reuse the off-gas of ABE fermentation which can be an attractive CO2 source for succinic acid production. Highlights <UL> <LI> Off-gas from ABE fermentation was firstly used for succinic acid production. </LI> <LI> A high succinic acid production of 65.7g·L−1 was acquired. </LI> <LI> Efficient CO2 utilization was obtained by an inner recycling bioreactor. </LI> <LI> Hydrogen content of the off-gas was simultaneously enriched to 92.7%. </LI> </UL>

발행연도

2016

발행기관

Elsevier

ISSN

0960-8524

권

214

페이지

pp.861-865

DOI

10.1016/j.biortech.2016.04.073