Method for extracting chitin by utilizing citric-acid fermentation waste residue

A technology of citric acid waste residue and fermentation waste residue, which is applied in the field of chitin extraction, can solve the problems of inability to realize industrial production, increase industrial cost, complex process, etc., and achieve large-scale industrial production, increase product yield, and improve product purity. Effect

Inactive Publication Date: 2011-02-16
天津泰康生物制药有限公司
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  • Abstract
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AI Technical Summary

Problems solved by technology

The process is more complicated, which will increase the industrial cost
Treating the waste mycelium with a colloid mill will inevitably make the impurities such as bran in the waste mycelium grind and become difficult to remove; in addition, it is difficult to buy industrial products for deacetylase
The method used to break the wall is not complete; the crushed particle size is consistent with the particle size of the bran and other impurities in the crushed citric acid waste residue, and it cannot be separated by filtration
Unable to achieve industrial production

Method used

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Embodiment Construction

[0012] Below in conjunction with the preferred embodiments, the specific implementation methods provided according to the present invention are described in detail as follows: a method for extracting chitin from citric acid fermentation waste residue, citric acid waste residue → pretreatment → high pressure wall breaking → coarse filtration → acid treatment → Alkali treatment → chitin → deacetylation → chitosan, the specific steps are as follows:

[0013] 1) Wash the citric acid fermentation waste residue, remove impurities for later use,

[0014] 2) Put the spare citric acid fermentation waste residue into the high-pressure broken wall tank and pressurize to 3kgf / cm 2 , and keep it for 10-30 minutes to make the pressure uniform; then suddenly reduce the pressure to 0kgf / cm in 0-3 seconds 2 , to rupture the mycelium cell wall;

[0015] 3) Release the material and carry out 20-40 mesh coarse filtration to remove impurities;

[0016] 4) After dehydrating the filtrate from whi...

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Abstract

The invention relates to a method for extracting chitin by utilizing citric-acid fermentation waste residues, which is characterized by comprising the following steps of: citric-acid waste-residue preprocessing, high-pressure wall breaking, coarse filtration, acid processing, alkali processing to obtain the chitin and deacetylation to obtain chitosan. The invention has the advantages that under the action of high-pressure wall breaking, a mycelium can become quite fine and can pass through a mesh screen of 20-40 meshes, and the solid impurities in the waste residues can be filtered. After a cell wall is broken, the chitin at the inner-layer part of the cell wall becomes easy to extract, thus not only the product purity is improved, but also the product yield is improved. The large-scale industrialized production is realized.

Description

technical field [0001] The invention relates to a method for extracting chitin from citric acid fermentation waste residue. Background technique [0002] Chitosan and its derivatives can be widely used in many fields such as medicine, cosmetics, food, chemical industry, agriculture, biotechnology, polymer materials, etc. The chitosan currently on the market is derived from the extract of chitin. Chitin mainly comes from the shells of shrimps and crabs. The preparation process is mature and has been industrialized. Many inherent shortcomings, such as the variability of chitin, have brought difficulties to the extraction of chitin. Fungal mycelium is another important source of chitin. A large amount of waste mycelium is produced in the process of pharmaceuticals, enzyme preparations and citric acid production. These mycelium cell walls generally contain 20%-40% chitin and chitosan, which is an important resource. Chitosan extracted from mycelium is very close to chitosan p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08B37/08C12S3/02
Inventor 范孝用赵红亮
Owner 天津泰康生物制药有限公司
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