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The feasibility of replacing yeast extract (YE) by corn steep liquor (CSL), a low cost nutrient source, for syngas fermentation to produce ethanol using Clostridium strain P11 was investigated. About 32% more ethanol (1.7gL −1 ) was produced with 20gL −1 CSL media in 250-mL bottle fermentations compared to media with 1gL −1 YE after 360h. Maximum ethanol concentrations after...
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