Production method and application of compound enzyme liquid for bagasse papermaking pulping

Abstract

The invention discloses a production method of a compound enzyme liquid for bagasse papermaking pulping, the production method is characterized by weighing component enzymes, mixing and blending in a compound tank, corrosion preventing, checking, packing and then storing in a storehouse at 5 DEG C, wherein the component enzymes are alkaline pectinase, xylanase and mannose or alkaline pectinase, xylanase, mannose and ligninase; the application of the compound enzyme liquid in the bagasse papermaking pulping comprises the following steps: feeding papermaking raw materials into a distilling pan to perform enzyme treatment after being pre-treated, that is, soaking the raw materials in the compound enzyme liquid, wherein the enzyme treatment condition is as follows: the temperature is at 40-60 DEG C, the mass ratio of the absolutely dry raw material to the compound enzyme liquid is 100: (1.2-1.8), and the enzyme soaking time is 20-60 min; and cooking in the distilling pan after the enzyme treatment. The component enzymes in the compound enzyme liquid are high in activity and inactive to crystalline cellulose and carboxymethyl cellulose; compared with the traditional chemical pulping method, the alkali dosage is reduced about 50%, the COD content in wastewater is reduced by more than 30%, the production cost is lowered by about 20%, and the product quality of the paper is improved.

Description

technical field [0001] The present invention relates to papermaking and pulping, in particular to bagasse papermaking and pulping, in particular to a production method and application of a compound enzyme liquid for bagasse papermaking and pulping. Background technique [0002] With the development of society and the improvement of people's living standards, the consumption of paper and paper products in my country is growing at a high speed, and it has become the second largest consumer market of paper and paper products in the world. In the world, 94% of papermaking raw materials are wood. Due to the lack of forest resources in my country, wood pulp mainly depends on imports. Bagasse, a by-product of sugarcane sugar production, is effectively used as a raw material for papermaking. Especially in Guangxi, the development of bagasse pulping and papermaking is rapid. According to incomplete statistics, the annual output of bagasse pulp is more than 900,000 tons, and it is in...

AI Technical Summary

Problems solved by technology

[0005] Using microorganisms to directly process raw materials, such as the publication number CN1683711A, the name of the invention is a papermaking biological pulping process; the publication number is CN1420229A, the name of the invention is a papermaking straw pulping process; A papermaking process that replaces the chemical pulping process with a biological fermentation pulping method; the publication number is CN1188830A, and the invention name is biological delignification-mechanical pulping technology and other patent applications all use microorganisms to directly process raw materials, and their main disadvantages There are: ⑴The cycle of biological treatment is long and usually takes a few days; ⑵The raw materials should be sterilized before microbial treatment, which increases the production cost and may reduce the quality of raw materials; ⑶It is difficult to effectively control the biological treatment process, and often occurs The quality uniformity of raw materials after biological treatment is poor, and carbohydrate degradation is serious, which leads to a decrease in pulping yield; (4) The quality uniformity of raw materials after biological treatment is poor, which directly affects the quality of pulping, thereby affecting the quality of the final product; (5) Using the above method to produce Compared with ordinary chemical pulp, the pulp has poor physical properties and bleaching properties, and cannot be used to produce high-brightness, high-strength paper, but can only be used to produce low-grade paper

[0006] Adopt enzymatic treatment of raw materials, such as publication number CN1616758A, the name of the invention is biological pulping process; publication number is CN1421570A, the name of the invention is patents such as the method for enzymatic pulping of grass raw materials, the main disadvantage of this technology is: The cost is high, and it does not have a cost advantage in industrial production; at the same time, it is difficult to control the damage of ligninase, xylanase, and hemicellulase to the corresponding components, and it may remove too much lignin, xylan, and hemicellulose. Affect pulp yield

However, its process is complex, and the raw materials need to be soaked in acid and alkali to be treated with enzymes, which has the following disadvantages: one is that the enzyme is single, and the time for soaking the enzyme is long; the other is that new equipment is needed to increase the cost; The steps of acid and alkali leaching add new pollution, which is not conducive to industrial production and use