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Anaerobic Fermentation of Synthesis Gas for Organic Acids and Alcohols Production |
1.Key Laboratory of Renewable Energy and Gas Hydrate, Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences, Guangzhou 510640, China
2.Graduate School of Chinese Academy of Sciences,Beijing 100039,China |
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Abstract Gasification of coal, oil, biomass or organic wastes generates synthesis gas, which consists primarily of CO, H2 and CO2. Synthesis gas may be used as substrates by some anaerobic bacteria to produce liquid fuels and chemicals such as ethanol, acetic acid, butanol and butyric acid. Anaerobic fermentation of synthesis gas is considered a promising and competing technology due to its advantages over catalytic techniques, and it's expected that synthesis gas fermentation will play a role in the conversion of biomass and organic wastes. Research progress in production of organic acids and alcohols via synthesis gas fermentation was reviewed, focusing on microorganisms, the metabolic pathway, key enzymes (especially carbon monoxide dehydrogenase /acetyl-CoA synthase) and bioreactors. Suggestions were also given to indicate areas where advances can be made.
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Received: 05 November 2009
Published: 25 March 2010
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