Method for preparing freshwater fish collagen peptide

Abstract

The invention belongs to the field of biotechnology and provides a method for preparing a freshwater fish collagen peptide. The method comprises the following steps that raw materials of fish skin, fish scales and water are subjected to heating compression, then are added with protease for enzymatic hydrolysis, then are added with diatomite, are stirred uniformly and are subjected to rough filtration; the filtrate is added with active carbon; the mixture is stirred uniformly and then is subjected to fine filtration; a semi-finished product obtained by the fine filtration is concentrated; and the concentrated semi-finished product is subjected to spray drying so that a collagen peptide is obtained. Through the method, a collagen peptide is prepared effectively from fish skin with fish scales. The collagen peptide obtained by the method has high hydroxyproline content more than 9.25, high nutritional values, high purity, no fishy smell, good water solubility, good fluidity and good absorbency, is clear, transparent, tasteless and colourless after being dissolved in water, and can be conveniently and directly taken or be processed into any high-grade foods and healthy foods.

Description

technical field [0001] The invention belongs to the field of biotechnology, in particular to a method for preparing freshwater fish collagen peptides. Background technique [0002] Collagen peptide is an important functional protein, which is a hydrolyzed product of collagen, and has the characteristics of low molecular weight and easy absorption. Hydroxyproline in collagen cannot be synthesized by the human body itself, and hydroxyproline is the necessary material basis for human cartilage tissue and connective tissue. Therefore, supplementing collagen is very important for human health. The sources of raw materials for collagen peptide products currently mainly include: the skin and bones of livestock, and fish. [0003] However, the extraction of collagen peptides from the skin and bones of livestock has the following problems: On the one hand, livestock such as pigs and cattle often have problems with foot-and-mouth disease or mad cow disease, and the extraction of coll...

AI Technical Summary

Problems solved by technology

[0003] However, the extraction of collagen peptides from the skin and bones of livestock has the following problems: On the one hand, livestock such as pigs and cattle often have problems with foot-and-mouth disease or mad cow disease, and the extraction of collagen peptides from the skin and bones of livestock has a higher risk On the other hand, the content of hydroxyproline in collagen extracted from animals such as cattle and sheep is generally 3-4%, while the content of hydroxyproline in collagen extracted from fish can reach 8-9.5%. It can be seen that the economic benefit of extracting collagen peptides from the skin and bones of livestock is low

However, there is no method in the prior art that can effectively utilize fish skin with scales to prepare collagen peptides

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