Joint use of acetone-butanol fermentation and of alcoholic fermentation for the conversion of sugar-yielding plants into a mixture of butanol, acetone and ethanol.

摘要

Process for the production of a mixture of butanol, acetone and ethanol from sugar-yielding plants. The process comprises two stages, a first stage of seeding with Clostridium acetobutylicum and a second stage of seeding with a yeast which produces ethanol, the second stage being commenced when the pH of the fermentation medium of the first stage has reached a minimum value. The invention applies in particular to the production of butanol, acetone and ethanol from sugarbeet and Jerusalem artichoke juices.