Method for lowering fermentation inhibitor from source

Abstract

The invention discloses a method for lowering fermentation inhibitor from a source. In the method, a steam explosion technology and an airflow classification technology are combined to be applied to the pretreatment of wood fiber raw material; selective pretreatment is carried out by a second-section steam explosion combing technology according to the characteristic of each tissue of the fiber raw material effectively, so that the fiber tissue can achieve a good pretreatment effect and the thin-wall tissue can be prevented from excessively degrading; therefore, while the enzymolysis rate of the fiber raw material is improved, the side reaction can be effectively prevented, i.e. the inhibitor content is lowered, an detoxication unit operation introduction is omitted, and the technology is simplified. In addition, in the technology, the separating and the selective treatment of the fiber cell and the thin-wall cell provide a new path for the layered multistage conversion and biomass power utilization of the wood fiber raw material. The second-section steam explosion combing technology is favorable for rehydration uniformity of the fiber raw material, the steam explosion condition of the second section of material is lowered, the raw material content is reduced, and the use ratio of the raw material is improved.

Description

technical field [0001] The invention relates to a method for reducing fermentation inhibitors derived from lignocellulose, in particular to a pretreatment method with steam explosion technology as the core. Background technique [0002] The structure and composition of lignocellulose are complex. Among them, the cellulose composed mainly of glucose groups has a dense structure and is difficult to hydrolyze, while the hemicellulose composed of various heterosaccharide groups has a loose structure and can be hydrolyzed into single sugar. A variety of lignocellulosic raw material pretreatment methods are currently being studied, such as acid hydrolysis, steam explosion, ammonia fiber explosion, and wet oxidation. Various pretreatment processes produce a variety of compounds, the types and contents of which vary with the properties of cellulose raw materials and pretreatment conditions, and mainly form three types of microbial growth inhibitors: 1) Weak acids: acetic acid, form...

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to aim at the production of fermentation inhibitors in the current lignocellulose pretreatment process has become one of the main bottlenecks in the lignocellulose bioprocessing process, and the commonly used detoxification process not only increases the fermentation cost of bio-based products, but also makes The process is more complicated, and it also leads to the loss of some fermentable sugars, etc., and a new two-stage steam explosion carding process has been developed