System for preparing viscose by pretreating corn straw through microbial co-culture

Abstract

The invention relates to a system for preparing viscose by pretreating corn straw through microbial co-culture. Corn straw peel obtained after corn straw stalks and leaves and peel are separated is used as a raw material, microbial co-culture of biomass degradation rumen microorganisms and a rumen microorganism degradation product or metabolite is achieved through fermentation of special equipment to degrade hemicellulose and unstable cellulose in the straw peel, the fermentation product can be separated in situ through regulation to achieve biological pretreatment on the corn straw peel, remaining high-crystallized lignocellulose is continuously cooked under the anaerobic environment to remove lignin and is subjected to cellulose dyeing or bleaching, viscose dissolution spinning is directly carried out on centrifuged cellulose pulp under the condition of certain water content, or melt spinning is carried out under the dry condition to prepare viscose. Usage of agentia for following cooking delignification is reduced through biological pretreatment, and then pollution is reduced; oxidization and blackening of pulp are reduced through anaerobic cooking, and then pollution is reduced; meanwhile, characteristics of fiber are kept to the maximum.

Description

technical field [0001] The invention relates to a method for preparing viscose fiber from biomass, in particular to a method for continuously preparing viscose fiber from corn stalks under anaerobic conditions by co-cultivating microorganisms. Background technique [0002] In recent years, there have been a variety of methods for preparing biomass viscose fiber using corn stalks as raw materials through biological methods. Some directly use chemical pulping to prepare viscose fiber, but the pollution is serious; some choose enzyme preparation to pretreat biomass to prepare viscose fiber, but the cost of enzyme preparation is too high; some use dilute acid pretreatment, The pollution is also serious; some choose aerobic microorganisms to pretreat corn stalks, because the yield of aerobic fermentation is low; some use anaerobic microorganisms to ferment, but use batch fermentation equipment, and the pretreatment period is long; Processing, but not continuous pulping and spinn...

AI Technical Summary

Problems solved by technology

Some directly use chemical pulping to prepare viscose fiber, but the pollution is serious; some choose enzyme preparation to pretreat biomass to prepare viscose fiber, but the cost of enzyme preparation is too high; some use dilute acid pretreatment, The pollution is also serious; some choose aerobic microorganisms to pretreat corn stalks, because the yield of aerobic fermentation is low; some use anaerobic microorganisms to ferment, but use batch fermentation equipment, and the pretreatment period is long; Processing, but not continuous pulping and spinning, and a large amount of black liquor is also required to be processed in an open environment

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