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Method for extracting nutritional components from cattle hair or cattle hide leftover materials

A kind of leftover material and nutritious technology, applied in the field of resource utilization of tanning solid waste, can solve the problems of resource waste and difficult recycling

Pending Publication Date: 2021-12-31
QILU UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Both hair keratin and skin collagen belong to hard protein, and their structure is relatively stable, so it is not easy to recycle
The traditional incineration reduction treatment method has caused a waste of resources

Method used

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  • Method for extracting nutritional components from cattle hair or cattle hide leftover materials
  • Method for extracting nutritional components from cattle hair or cattle hide leftover materials
  • Method for extracting nutritional components from cattle hair or cattle hide leftover materials

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Embodiment 1: a kind of method of extracting the nutritive component in cow hair or cowhide leftovers

[0023] (1) Primary degradation of cow hair: Use sodium hydroxide to adjust the pH to 10.5, and use a compound enzyme preparation A of alkaline protease and glycosidase, wherein the enzyme activity of alkaline protease is 150U / ml, and the enzyme activity of glycosidase is 50U / ml. The temperature is 60°C, the reaction time is 8 hours, and the hydrolyzate A of the primary degradation of cow hair is obtained;

[0024] (2) Primary degradation of cowhide leftovers: use sodium hydroxide to adjust the pH to 13, after boiling at high temperature, add compound enzyme preparation B, in which the activity of alkaline protease is 200U / ml, the activity of lipase is 30U / ml, and the activity of glycosidase is 60U / ml, the action temperature is 60°C, the reaction time is 24h, and the hydrolyzate B of the primary degradation of cowhide leftovers is obtained;

[0025] (3) Mix hydrolyza...

Embodiment 2

[0027] Embodiment 2: a kind of method of extracting nutritional components in cow hair or cowhide leftovers

[0028] (1) Primary degradation of cow hair: use sodium hydroxide to adjust the pH to 13, boil for 12 hours, use the composite enzyme preparation A of alkaline protease and glycosidase as the cooling liquid, wherein the alkaline protease contains Bacillus, and the enzyme activity is 100U / ml , the glycosidase activity is 25U / ml, the action temperature is 40°C, the reaction time is 8h, and the hydrolyzate A of the primary degradation of cow hair is obtained;

[0029] The alkaline protease is fermented by Bacillus subtilis, and the protease activity is 45000U / g; the glycosidase is fermented by Trichoderma, and the glycosidase activity is 95000U / g;

[0030] (2) Primary degradation of cowhide leftovers: use citric acid to adjust the pH to 2, after boiling at high temperature, add compound enzyme preparation B, in which the activity of acid protease is 100U / ml, the activity o...

Embodiment 3

[0034] Embodiment 3: a kind of method of extracting the nutritive component in cow hair or cowhide leftovers

[0035] (1) Primary degradation of cow hair: use sodium hydroxide to adjust the pH to 10.5, use a compound enzyme preparation A of compound alkaline protease and glycosidase, wherein the enzyme activity of alkaline protease is 150U / ml, and the enzyme activity of glycosidase is 50U / ml, The action temperature is 60°C, the reaction time is 8 hours, and the hydrolyzate A of the primary degradation of cow hair is obtained;

[0036] The compound alkaline protease is fermented by Bacillus subtilis and Bacillus amyloliquefaciens, the total protease activity is 40000U / g, and the ratio is 1:1 activity; the lipase is fermented by Aspergillus, The lipase activity is 30000U / g; the glycosidase is fermented by Bacillus subtilis, and the glycosidase activity is 15000U / g;

[0037](2) Primary degradation of cowhide leftovers: use sodium hydroxide to adjust the pH to 13, after boiling a...

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Abstract

The invention relates to a method for extracting nutritional components from cattle hair or cattle hide leftover materials and belongs to the field of resource-converted utilization of leather-making solid wastes. The method comprises the following steps: taking the cattle hair and cattle hide leftover materials generated in leather-making unhairing liming procedures as raw materials, and extracting the nutritional components such as proteins, fats and carbohydrates from the raw materials under the action of a compound enzyme preparation, wherein the compound enzyme preparation comprises protease, lipase and glycosidase. According to the method, the problem of treatment of hair solid wastes generated during unhairing and liming and the problem of treatment of cattle hide leftover material solid wastes generated during the unhairing and the liming are successfully solved; and the content and molecular weight of the nutritional components are effectively controlled, and subsequent application is facilitated.

Description

technical field [0001] The invention relates to a method for extracting nutritional components in cow hair or cowhide leftovers, and belongs to the field of resource utilization of tanning solid waste. Background technique [0002] Cowhide is currently widely used in the preparation of sofa leather, shoe upper leather, bag leather, etc., and is the most important type of raw leather for leather production. The dehairing and liming process is one of the necessary links in leather production. During this process, the hair in the epidermis of the hide is removed, so a large amount of hair is produced; in addition, a large amount of cowhide trim is produced during the fleshing process. The main components in these solid wastes are hair keratin and skin collagen, and also contain some fat and glycoprotein components; in addition, in view of the leather production method, these solid wastes may contain a small amount of chemical reagent components: such as sodium chloride ( NaCl...

Claims

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Application Information

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IPC IPC(8): C12P21/06C12P19/14C12P19/00C12P7/64
CPCC12P21/06C12P19/14C12P19/00C12P7/64
Inventor 曹珊宋金枝李彦春
Owner QILU UNIV OF TECH
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