Method for producing butanol by hydrolyzing and fermenting waste crops rich in hemicellulose

Abstract

The invention discloses a method for producing butanol by hydrolyzing and fermenting waste crops rich in hemicellulose, belongs to bio-energy production by biomass fermentation and provides a method for producing the butanol by hydrolyzing and fermenting through acetic acid pretreatment by using biomasses rich in the hemicellulose as raw materials. The method comprises the following steps: mixing and hydrolyzing the raw materials; adding acetic acid to a reaction mixed solution of crop wastes rich in the hemicellulose biomasses and water; and controlling the temperature and the time to hydrolyze and ferment. In the method, the acetic acid is applied to pretreat and hydrolyze the hemicellulose, and the acetic acid in hydrolysis liquid can be utilized by fermentation thalli, thereby overcoming the defects such as overhigh salt content of sulfuric acid hydrolysis and environmental pollution by post-treated wastes.

Description

technical field

[0001] The invention belongs to biomass fermentation to produce bioenergy, and the invention relates to the production of solvent acetone, butanol and ethanol by using agricultural waste rich in hemicellulose and pressing residue waste in the sugar industry, acetic acid hydrolysis, and clostridia fermentation. Background technique

[0002] The fermentation history of acetone butanol can be traced back to the 19th century. It was an important production method of acetone, an important smokeless explosive in World War I and World War II. With the great development of the petroleum industry, it gradually declined. The fermentation method was basically eliminated in the 1990s. Replaced by petrochemical methods of petrochemical technology. Due to the non-renewability of fossil energy and the increasingly urgent environmental pressure, people have once again seen the many advantages of producing solvents by fermentation. However, traditional fermentation methods u...