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

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 present invention involves a method of extracting chitin by using citrate fermentation waste residue. Background technique [0002] Shell glycogen and its derivatives can be widely used in many fields such as medicine, cosmetics, food, chemical, agriculture, biotechnology, polymer materials, etc.The shell polycan sold on the current market originated from the extract of the chitin. The chitin is mainly from the shell of shrimp and crabs. It is mature and produced industrialized.Many inherent shortcomings such as differentiation have brought difficulties to the extraction of chitin.Bacteria wire is another important source of chitin.Pharmaceuticals, enzyme production and citric acid production produces a large amount of waste bacteria. In these mycelium cell walls, it generally contains 20%-40%methamphetamine and chitosan, which is an important resource.The shells extracted from the mycelium are very close to the shells produced with shrimp shells, but t...

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