Effects of metal ions on syngas fermentation by C2~C6 acid/alcohol-producing Clostridium carboxidivorans P7 and Clostridium sp. JS66
- Effects of metal ions on syngas fermentation by C2~C6 acid/alcohol-producing Clostridium carboxidivorans P7 and Clostridium sp. JS66
- 이선미; 엄영순; 김경식; 김경헌
- Issue Date
- 2018 한국생물공학회 춘계학술발표대회 및 국제심포지엄
- Syngas and steel waste gas including carbon monoxide, carbon dioxide and hydrogen are widely studied to use in biological production of acid and alcohol. Among anaerobic microorganisms, acetogens can convert syngas into C2~C6 acid and alcohol products through the Wood-Ljungdahl pathway. Trace metals have been known to influence syngas fermentation because trace metals are often required for active sites of key enzymes. In this study, Clostridium carboxidivorans P7 and Clostridium. sp. JS66 producing C2~C6 acids and alcohols were used to investigate the effects of metal ions (tungsten, molybdenum, and selenium) on syngas fermentation. Clostridium. sp. JS66 is a noble species with 33 % of DNA-DNA hybridization values with C. carboxidivorans P7. The results showed that metal ions affected the syngas fermentation of those two strains in various ways. The addition of tungsten improved alcohol production. When molybdenum was supplied, cell growth was enhanced. Adding selenium stimulated gas consumption. To further efficiently produce acids and alcohols through syngas fermentation, optimizing medium composition would be required along with cultivation conditions.
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