High-purity rice protein powder and preparation method and applications thereof

Abstract

The invention discloses a high-purity rice protein powder. The preparation method of the rice protein powder comprises the following steps: (1) pulverizing rice, and performing size mixing; (2) performing enzymolysis and filtration; (3) subjecting rice slag to size mixing and pulverization; (4) adding a composite surfactant; 5), separating out a liquid phase and a heavy phase with a 12-stage cyclone washing device; (6) adding a complex enzyme agent to the heavy phase to obtain an enzymolysis liquid; and (7) subjecting the enzymolysis liquid to jet sterilization and plate-frame pressure filtration, collecting filter cakes, and performing pneumatic drying and superfine dry pulverization to obtain the high-purity rice protein powder. The method uses the rice as a raw material and the composite surfactant as a main means for removing grease and removing cellulose, and prepares the high-purity rice protein powder. The product has high purity, the treatment process is mild, the change of protein structure property is small, the taste is better, and the suspension stability is good.

Description

technical field [0001] The invention relates to the field of food technology, in particular to a high-purity rice protein powder and its preparation method and application. Background technique [0002] Rice protein powder refers to the protein extracted from rice, which is mainly a powdery substance formed by crushing, purifying, drying and other processing of rice dregs. Rice protein powder is an important product of rice deep processing. According to its protein content and solubility, it can be divided into feed-grade rice protein, high-purity food-grade rice protein powder and rice protein peptide. Rice protein is mainly composed of albumin, globulin, prolamin and glutenin. The amino acid composition of rice protein is reasonable, and the amino acid content is high, so it is recognized as a high-quality edible protein. Rice protein powder has a broad prospect of being developed into infant food and high-end food because of its high nutritional value and hypoallergenici...

AI Technical Summary

Problems solved by technology

The protein structure is changed during the alkaline extraction, which makes the protein functional properties poor, and will produce toxic substances; the protease extraction rate is not high, the protein purity is not ideal, and the product will produce a strong bitter taste; Starting from rice dregs, the fat, residual starch granules, cellulose and other insoluble matter in rice dregs are specifically enzymatically hydrolyzed to separate them from rice dregs protein so as to increase the protein content of protein; The treatment process such as cellulose is not perfect, and the structure of the protein is greatly changed

[0004] In the prior art, the extraction of rice protein starts from rice dregs, and after high-temperature drying in the middle, the extensibility, foamability, and stability of the protein are reduced, and the structure is not easy to open, which is not conducive to subsequent purification work; degreasing is common The method of alkaline saponification is used, which has low degreasing efficiency (part of the fat combined with protein cannot be removed), and high concentration of alkali will change the functional properties of protein; the enzyme preparation for removing cellulose is relatively simple, and cannot dissolve more Colloidal substances; the current high-purity rice protein powder on the market is not high enough, and the taste is not delicate enough

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