Method for producing high-butanol acetone-butanol by biological process

Abstract

The invention produces acetone and butanol using starch-containing matters, such as starch-containing subsidiary agricultural products as raw materials according to the characteristics of acetone-producing bacteria and butanol-producing bacteria. The method has butanol yield of 78%, reduces production cost, and is suitable for large-scale industrial production. The inventive method is characterized in that the method comprises the following steps of: (1) treating starch-containing matters before fermentation with enzyme method; (2) optimizing carbon-nitrogen ratio between enzymatic treatment of starch-containing matters and fermentation; and (3) increasing waste mash recycling ratio, reducing COD content in waste mash, and reducing sewage treatment capacity. The yield of butanol produced by the method is 78%. The method remarkably reduces vapor consumption, reduces COD content in waste mash, increases waste mash recycling ratio, and reduces sewage treatment capacity. And the method uses starch as raw material. The inventive method reduces production cost, and is suitable for large-scale industrial production.

Description

technical field

[0001] The present invention relates to the production method of acetone and butanol. Specifically, it uses starch-containing substances, especially starchy agricultural and sideline products as raw materials, especially starch as raw material to carry out high-temperature amylase liquefaction, and then biologically produces acetone and butanol. Alcohol method. Background technique

[0002] Acetone, butanol, and ethanol are collectively referred to as the total solvent of acetone, and they are important chemical material monomers for medicine, pesticides, plastics, paints, national defense, and light industries. Butanol is widely used in the production of various plastic and rubber products. In addition, butanol as a biofuel to replace gasoline has also received great attention internationally. Compared with ethanol, butanol can be blended with gasoline in higher proportions, making it more suitable for use in existing fuel supply and distribution systems. ...