Leather making bio-pretreatment method

A biological and process technology, applied in the field of tanning biological pretreatment, can solve the problems of large water consumption and ecological environment hazards, and achieve the effect of reducing the use of lime, reducing the content of suspended solids, and reducing the load of COD and BOD

Active Publication Date: 2010-06-30
FENGAN LEATHER
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AI Technical Summary

Problems solved by technology

[0003] In the pre-tanning treatment section, not only consumes a lot of water, but also discharges a large amount of organic pollutants and some toxic and harmful substances, causing serious harm to the ecological environment

Method used

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Embodiment Construction

[0017] Now illustrate the present invention in conjunction with accompanying drawing and embodiment.

[0018] The key technology of the invention is to replace the traditional chemical method with the biotechnology based on the biological enzyme agent to treat the raw hides, so as to remove the protein components on the raw hides which are irrelevant to tanning.

[0019] The processing objects of each process in the preparation section are mainly various proteins (such as keratin, collagen, reticulin, elastin and albumin, globulin, proteoglycan in the fibrous matrix, etc.) and fats. Due to the high efficiency and specificity of enzymes, in each process of the preparation section, various enzyme preparations can be selected and used according to the needs of the objects they act on, so as to achieve the desired effect with a small amount and reduce harmful effects. The use of substances shortens the processing time and improves or improves the quality of the finished leather. ...

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Abstract

The invention discloses a leather making bio-pretreatment method. By using a biotechnology to replace or partly replace a chemical method and utilizing compound enzyme preparations including lipase and protease, the method strengthens processes of soaking and degreasing, accelerates dispersion of collagen fibers, optimizes the enzyme bating process, shortens the treatment time and reduces the consumption of water and the use of a chemical additive. Compared with the traditional leather-making technology, the leather making bio-pretreatment method can accelerate the soaking process and the fiber dispersion process, shorten the process time by 6-12h, realize water saving by about 30 percent and COD (Chemical Oxygen Demand) emission reduction by 20-40 percent, lower the dosage of protosulphide by 40-50 percent and the like. In the invention, on the basis of lowering the consumption of the protosulphide by using a hair-saving method, an environmental friendly auxiliary liming agent which is prepared by utilizing the biotechnology and a physicochemistry principle can completely consume residual sulfide in waste liquid to enable unhairing waste liquid and limed pelts not to contain the sulfide and completely eliminate pollution of the sulfide; therefore, the invention has the advantages of simple operation and low cost without influencing the product quality. In addition, in the whole pretreatment process, the biological enzyme preparation is considered to be utilized to efficiently and harmlessly remove components on animal skin unrelated to leather making.

Description

technical field [0001] The invention relates to a tanning treatment technology. Specifically, it relates to a biological pretreatment technology for tanning. Background technique [0002] Leather industry is a heavy polluting industry. In the process of tanning chemical industry, on the one hand, the useless protein components (hair, fat, fibrous interstitial, etc.) on the animal skin are removed, and a large amount of COD and BOD are produced. 5 On the other hand, poisonous and harmful chemical substances are used, and a large amount of chemical materials are not fully absorbed and utilized in the manufacturing process, and enter the waste water, bringing new pollution. If these two problems cannot be effectively solved, especially the environmental pollution problem, it will become an important factor seriously restricting the sustainable development of my country's leather industry, and even face closure and shrinkage in the near future. Therefore, while striving to im...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C14C1/00C14C1/04C14C1/06C14C1/08
Inventor 陈荣辉
Owner FENGAN LEATHER
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