Preparation technology of soybean peptide powder

Abstract

The invention provides preparation technology of soybean peptide powder. The method comprises the following steps: low temperature defatted soybean meal and water are mixed, pH value is adjusted to 4.0-5.0, and extraction and solid-liquid separation are carried out; the solid phase and water are mixed, pH value is adjusted to 4.0-5.0, secondary extraction is carried out, and solid-liquid separation is carried out; the solid phase and light alkaline water are mixed, the pH value is adjusted to 6.5-8.5, grinding is carried out till 90% or above of the material can pass the sieve of 80 mesh sieve; steam is added into the slurry, and the temperature is adjusted to 40-70 DEG C; alkali protease is added, after mixing, the material is kept for 60-120 minutes, and then sterilization and flash evaporation are carried out; the temperature of the slurry is adjusted to 40-70 DEG C, enzyme liquid compounded by alkali protease and neutral protease is added, after mixing, the material are kept for 60-120 minutes, and solid-liquid separation is carried out; active carbon is used for decolouring and smell removal of the liquid phase, and then sterilization and flash evaporation are carried out; condensation as well as homogenizing and drying are carried out in order to obtain soybean peptide powder. The soybean peptide powder product is rich in soybean polypeptide and soybean fiber polysaccharide, and the product is suitable for sports food, pressure reduction foodstuff and fatigue recovering foodstuff and other health products or foodstuffs.

Description

technical field [0001] The invention belongs to the technical field of soybean protein deep processing, and in particular relates to a preparation process of soybean peptide powder. Background technique [0002] Soybean peptide powder is a protein hydrolyzate obtained from soybean protein after protease action and special treatment. It is a mixed peptide product composed of 2-6 amino acids with a molecular weight of 200-800Dalton. The essential amino acid composition of soybean peptide powder is exactly the same as that of soybean protein, rich and balanced in content, and the polypeptide compound enters the human body without digestion and can be directly absorbed, and has the functions of promoting energy metabolism, anti-obesity, anti-fatigue, restoring physical strength, lowering cholesterol, and preventing arteriosclerosis Atherosclerosis, the role of regulating the physiological functions of the human body. Therefore, the nutritional properties of soybean peptide powd...

AI Technical Summary

Problems solved by technology

However, there is no process for removing soybean oligosaccharides in this process plan, only the remaining bean dregs fiber after hydrolysis is removed, so it is impossible to realize the production of polypeptides with high protein content, the actual protein content should be less than 65%, and the product contains a large number of oligosaccharides

However, the protein content of this process is not high

[0004] In addition, the enzymatic production of polypeptide technology has high requirements on protein quality, and there are problems such as high price of raw and auxiliary materials, low enzymatic hydrolysis efficiency, low yield of polypeptide, large amount of enzyme, generally 2%-20% of the weight of soybean protein isolate, etc. As a result, peptide products on the market are expensive, and market sales have been unable to achieve a major breakthrough

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