Method for extracting fiber from straw

Abstract

The invention relates to a method for extracting fiber from straw. The method comprises the following steps: crushing, dedusting and puffing a straw raw material; adding an enzyme preparation for anaerobic decomposition; then adding an enzyme preparation and continuously conducting aerating for hydrolysis; and carrying out filter pressing on the obtained product to obtain a product paper pulp raw material. The enzyme preparation is prepared from the following components in parts by mass: 10 to 14 parts of bacillus, 22 to 25 parts of lactobacillus, 20 to 25 parts of saccharomycetes, 18 to 20 parts of bacillus subtilis, 17 to 22 parts of bacillus natto, 14 to 17 parts of photosynthetic bacteria, 13 to 17 parts of nitrifying bacteria, 16 to 21 parts of actinomycetes, 13 to 18 parts of filamentous bacteria, 30 to 37 parts of pectinase, 35 to 43 parts of amylase, 25 to 30 parts of ligninase and 31 to 39 parts of hemicellulase. According to the method, other components except cellulose in the straw raw material can be effectively removed, the straw can be directly converted into the paper pulp raw material available for papermaking, the reutilization rate of the straw can be remarkably increased, resource waste is reduced, meanwhile, the wood demand quantity of papermaking production can be effectively reduced, wood consumption is reduced, and the method is more environmentally friendly.

Description

technical field [0001] The invention relates to the technical field of straw treatment, in particular to a method for extracting fiber from straw. Background technique [0002] The annual output of crop straw in my country is about 700 million tons. Straw is rich in natural cellulose fibers and is a potential renewable fiber resource. Restricted by climate (such as returning straw to the field in the arid area of ​​Northwest my country is not easy to rot, and the conversion efficiency is low when fermenting biogas in winter), price (such as the general purchase price of straw is low, farmers are not motivated to purchase and store, the cost of biomass power generation is high, and power plants are losing money) , Pollution (secondary pollution during reuse), technology and many other factors have brought great difficulties to the reuse of straw. In my country's rural areas, the recycling rate of straw is very low, about 33%, and most of the recycling is simply returning to t...

AI Technical Summary

Problems solved by technology

Pulp is rich in cellulose and is one of the raw materials for papermaking. It is mostly made of wood. my country's wood resources are in short supply. A large number of felling wood for papermaking is not in line with my country's sustainable development policy, nor in line with the current energy-saving and environmental protection production concept.

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