A method for comprehensive utilization of straw raw materials

Abstract

The invention relates to a comprehensive utilization method of straw raw materials. The method is characterized by comprising the following steps: a, carrying out solid-liquid separation on steam-exploded straws, using an alkaline cooking method to process solid bodies of the steam-exploded straws, and extracting good xylogens from an alkaline extract liquor by an acid-out method; b, carrying out enzymolysis on the extracted residues in the step a to obtain zymolytic residues and a zymolytic liquid, wherein the zymolytic residues are used for preparing pulps; and c, after the steam-exploded straws in the step a are detoxificated, mixing a zymolytic liquid with the zymolytic liquid in the step b and adding nitrogen sources to butylicum fermentation. The method has the advantages that sources of raw materials are wide; the separation of celluloses (continuous fibers and staple fibers), hemicelluloses, xylogens and the like in the straws is realized, thus sufficiently realizing the value of each component; and the celluloses are divided into the continuous fibers which are difficult to realize enzymolysis and the staple fibers which are easy to realize enzymolysis, thus reducing the usage amount and cost of the cellulase, improving the comprehensive utilization value of the straws and solving the source problem of raw materials in industrialization production of the butylicum fermentation.

Description

technical field [0001] The invention relates to a comprehensive utilization method of straw raw materials. Background technique [0002] In recent years, with the development of the rural economy and the improvement of farmers' living standards, my country's grain production capacity has increased year by year, but the straw that was in demand in the past has now become a worrying "burden", which has caused pollution of the environment and waste of resources by straw burning. Many problems, how to find a way out for the increasing straw and turning waste into treasure has become an imminent social problem. The comprehensive utilization of straw provides new opportunities for solving the contradiction between energy supply and demand. Therefore, actively developing renewable energy is crucial to solving the problem in rural areas. Living energy and ecological construction are of great significance. [0003] With the depletion of petroleum resources, the energy problem has attr...

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Problems solved by technology

[0003] With the depletion of petroleum resources, the energy problem has attracted more and more attention from the public, and the acetone-butanol fermentation industry liquid has attracted more and more attention from the people. However, the traditional raw materials for acetone-butanol fermentation are corn and cassava, and the cost of raw materials is high. The market fluctuates greatly, which greatly limits the healthy development of the acetone-butanol fermentation industry. Straw is the main by-product of crops and is also a very valuable biological resource. However, the main reason why there has been no breakthrough in the production of ethanol and butanol from straw for a long time The comprehensive utilization rate of straw resources is low, the cost of cellulase is high, and the dosage is large. It is urgent to develop new technologies for comprehensive utilization of straw so that the components of straw can be used efficiently.

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