Compound bio-enzyme preparation as well as preparation method and application thereof

Abstract

The invention discloses a compound bio-enzyme preparation as well as a preparation method and application thereof, wherein the bio-enzyme preparation comprises the components in percentage by mass: 30-35% of endo-cellulase, 20-25% of exo-cellulase, 2-5% of sodium chloride, 1-3% of potassium sorbate, and 0-12% of deionized water. During preparation, the deionized water is added into a stirring tank, the sodium chloride, pectinase and laccase are added into the stirring tank according to the proportion to be stirred, then the endo-cellulase, the exo-cellulase and xylanase are continuously stirred, the potassium sorbate is added according to the proportion to be stirred, and the compound bio-enzyme preparation is obtained. The bio-enzyme preparation is used for preparing chemi-mechanical pulp, the compounded bio-enzyme preparation is used for treating wood chips, fibers can be activated, the fiber structure becomes loose, the water absorption swelling degree and the fibrillation degree of the fibers in the pulping process are promoted by decomposing the interiors of the fibers, pulping is easier, and pulping energy consumption is reduced. Meanwhile, the compound bio-enzyme preparation can remove part of lignin in the wood chips, improve the whiteness of paper pulp and reduce the dosage of chemicals.

Description

technical field [0001] The invention relates to the technical field of papermaking, in particular to a compound biological enzyme preparation and its preparation method and application. Background technique [0002] With the further growth of my country's economy, people's living standards continue to improve, and people's demand for paper products continues to increase. Only relying on high-quality wood raw materials is far from being able to meet market demand. At the same time, my country's paper industry has developed rapidly, and the total output of paper has also increased rapidly. The insufficient supply of paper raw materials has become an important factor restricting the development of my country's paper industry. With the shortage of fossil energy in the world, the price continues to rise. Therefore, for high-yield pulp production enterprises, it is necessary to reduce the power consumption of refining, thereby saving production costs, and at the same time strive t...

AI Technical Summary

Problems solved by technology

[0004] Chinese patent application CN108374292A provides a production process for preparing chemical-mechanical pulp by using a special-effect composite biological enzyme preparation. Hydrogenase, citric acid synthase, Bacillus subtilis freeze-dried powder, Acetobacter freeze-dried powder, organic acid nutrient solution and water. Biological enzymes are added twice when wood chips are rubbed, but the enzymatic hydrolysis reaction temperature reaches about 80°C , the temperature of the chemical-mechanical pulping system is relatively high, and with the stirring and shearing process, the utilization efficiency of biological enzymes is not high, and the energy consumption of pulping is still relatively high