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Production method and applications of compound enzyme liquid used in papermaking and pulping process of wheat straws and rice straws

A composite enzyme solution and production method technology, applied in the field of paper pulping, can solve the problems of unfavorable industrial production, difficult to control component damage, and single enzyme species, so as to improve accessibility and utilization rate, reduce COD content, increase The effect of product quality

Active Publication Date: 2014-01-29
江苏富星纸业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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

Method used

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Examples

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Effect test

Embodiment 1

[0017] A production method of a compound enzyme solution for wheat straw and rice straw papermaking pulping. The enzymes of each component are weighed, mixed and prepared in a compound tank, preserved, inspected, packaged, and stored in a warehouse at 5°C. The enzymes of each component It is alkaline pectinase and xylanase; the alkaline pectinase is CCTCC NO: M 2010004 strain after strain culture, shake flask fermentation, seed tank to fermenter, filtration, sterilization, antiseptic treatment Preparation; the xylanase is prepared by CGMCC NO: 5466 strains through strain culture, shake flask fermentation, seed tank to fermenter, filtration, sterilization, and antiseptic treatment; alkaline pectin in the compound enzyme liquid The enzyme activity is 1500u / ml-2000u / ml, and the xylanase activity is 1000u / ml-1500u / ml.

[0018] The CCTCC NO: M 2010004 bacterial strain described in the present invention is obtained from nearly a hundred bacterial strains by naturally collecting bact...

Embodiment 2

[0044] The various component enzymes described in the present invention are alkaline pectinase, xylanase, mannanase and ligninase; the mannanase is CGMCC NO: 6226 strains cultured by strains and fermented in shake flasks , prepared from seed tank to fermenter, filtered, sterilized, and preservative treated; the ligninase is CGMCC NO: 6225 strain, cultured by strain, fermented by shake flask, transferred from seed tank to fermenter, filtered, sterilized, preserved Prepared after treatment; the activity of alkaline pectinase in the compound enzyme liquid is 1000u / ml~1500u / ml, the activity of xylanase is 800u / ml~1200u / ml, and the activity of mannanase is 800u / ml ml~1200u / ml, the activity of ligninase is 20u / ml~80u / ml.

[0045]The CGMCC NO: 6226 bacterial strain described in the present invention is collected in Ningxia, China. During the strain selection and screening process, a high-yield bacterial strain with a laboratory number of PARK9639 was screened out. According to the ma...

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PUM

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Abstract

The invention discloses a production method of a compound enzyme liquid used in the papermaking and pulping process of wheat straws and rice straws. The production method is characterized by comprising the steps of weighing each component enzyme, mixing and compounding all the component enzymes in a compounding pot, performing corrosion prevention, inspecting, packaging, and storing in a warehouse with the temperature of 5 DEG C, wherein the component enzymes are alkaline pectinase and xylanase, or are alkaline pectinase, xylanase, mannose and ligninase. The application of the compound enzyme liquid in the papermaking and pulping process of wheat straws and rice straws comprises the following steps: papermaking raw materials are pre-treated and then sent into a digester for enzyme treatment, namely the raw materials are soaked with the compound enzyme liquid, wherein the enzyme treatment conditions are as follows: the temperature ranges from 40 DEG C to 60 DEG C, the mass ratio of an absolute dry raw materials to the compound enzyme liquid is 100:(1.2-1.8) and the enzyme soaking time ranges from 20 minutes to 60 minutes; after enzyme treatment, the papermaking raw materials are digested in the digester. Each component enzyme in the compound enzyme liquid is high in activity but has no activity to crystalline cellulose and carboxymethyl cellulose; and compared with the traditional chemical pulping method, the production method has the advantages that the use amount of alkali is lowered by about 50%, the content of COD (Chemical Oxygen Demand) in waste water is lowered by over 30%, the production cost is lowered by about 20% and the quality of paper products is enhanced.

Description

technical field [0001] The present invention relates to a kind of papermaking pulping, specifically a kind of wheat straw, rice straw papermaking pulping, particularly relate to a kind of production method and application of compound enzyme liquid for wheat straw, rice straw papermaking 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. my country is a large agricultural country with rich crop straw resources and low prices. Therefore, wheat straw and rice straw have become one of the main papermaking raw materials in my country. It can not only make up for the shortage of papermaking r...

Claims

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Application Information

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IPC IPC(8): C12N9/88C12N9/42D21C5/00C12R1/125C12R1/07
CPCC12N9/0004C12N9/248C12N9/2488C12N9/88C12Y302/01008C12Y302/01025C12Y302/01032C12Y302/01078C12Y402/02002D21C5/005
Inventor 李忠兴杨忠义
Owner 江苏富星纸业有限公司
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