abstract |
The present invention relates to a method for producing C4 bodies, preferably butyric acid and / or butanol, comprising the steps of contacting an aqueous medium comprising an acetogenic bacterial cell in an aqueous medium with synthesis gas, and incubate the mixture obtained in step a) at a temperature between 0 and 100 ° C for at least 30 minutes, wherein the aqueous medium comprises, in step b), ethanol and / or acetate at a total combined concentration of at least 0.1 g L-1. |