PROCESS AND SYSTEM FOR PRODUCTION OF ORGANIC SOLVENTS

摘要

The present invention relates to a process for production of organic solvents, mainly butanol, using the anaerobic fermentation by butanol, acetone, and ethanol-producing bacteria, also the invention relates to a system for carrying out of the process and product obtained by the process. The claimed process comprises pretreating plant raw material, saccharifying the pretreated material with enzymes which degrade or convert the material into sugar solution, fermenting the sugar solution by butanol, acetone, ethanol producing bacteria in a fermentor, removing organic solvents and fermentation gases, recovering end product. Moreover the pretreatment comprises a coarse milling and then a fine milling, an enzyme complex is used for the saccharification, and the enzyme complex is matched to polysaccharide components of the raw material; the fermentation is carried out with predominant production of butanol by periodic pressure reduction in the fermentor and simultaneous removal of organic solvents and fermentation gases.