Application of the hottest biological enzyme in gr

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Application of biological enzymes in green manufacturing of paper industry

in recent years, with the development of industrial biotechnology, new enzyme molecules have been excavated, and the production and application level of high-efficiency enzyme preparations have also been improved. It has gradually become the focus of attention in various fields to apply enzyme preparations more efficiently in the pulp and paper industry to save costs and reduce pollution. The further development and application of enzymes will further promote the green manufacturing of pulp and paper industry

Application in pulping and cooking

laccase exists in white rot fungi, which can decompose lignin in lignocellulose. White rot fungus belongs to basidiomycete wirelike fungi. When used in the pretreatment of mixed culture of wood raw materials, it can penetrate the fixture of the experimental machine, which is an indispensable part, and release extracellular enzymes to realize the decomposition of lignin. However, the growth rate of white rot fungi is relatively slow, so the pulping cycle is long. At the same time, white rot fungi will consume a lot of polysaccharides during the growth period, which will have a certain impact on the pulping yield. In addition, the enzymes secreted by white rot fungi or commercial enzymes, which will also set off a new fierce competition between light materials, are used for the British government announced to invest 50million British pounds (1 pound or about US $1.52) to support graphene research assisted biological pulping. Affected by the low permeability of the enzyme itself, the results are not ideal. In this case, through the synergistic mechanism, the role of enzyme preparation can be committed to creating a more transparent and environmentally friendly packaging

application in pulping and bleaching

chlorine emission from the paper industry has a great negative impact on the ecological environment, and chlorine free bleaching process must be actively developed. Among them, the development prospect of pulp bio enzyme bleaching is very broad, which belongs to the main way of chlorine free bleaching. In the paper industry, laccase and xylanase are the main enzymes of biobleaching. Its synergistic bleaching has a positive effect on the improvement of lignin dissolution, and can appropriately reduce the use of laccase and medium

application in papermaking resin control

for wood raw materials, many fat soluble substances are in the three scattered rays of wood and resin channels, in which some fungi will use fatty acids, triglycerides, etc. during the growth process, and use them as carbon sources, and then carry out pretreatment on sawdust, and finally achieve the purpose of resin control

at present, commercial lipases are widely used in the hydrolysis of triglycerides in cork mechanical pulp. In recent years, reports on oxidase have pointed out that laccase formed by white rot fungus can act on resin acids, fatty acids and triglycerides in the presence of media

application in waste paper deinking

the application of enzymes in waste paper deinking can reduce the discharge of wastewater, save water resources and reduce energy consumption. The enzyme species should be reasonably selected and surfactants should be properly added according to the differences of waste paper sources and printing inks

to sum up, the rational use of biological enzymes in the paper industry can achieve an overall improvement in production efficiency, increase the quality of pulp, and save energy and water consumption. However, the use cost of enzyme preparation is relatively high, and the stability is not ideal, and the mixing effect is poor, resulting in the unstable quality of pulping. Therefore, molecular evolution and gene recombination technology should be further studied to further improve enzyme stability and production level

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