Method for extracting rice protein by using rice

Abstract

The invention discloses a method for extracting rice protein by using rice, which comprises the following steps: soaking and grinding, rice milk adjustment, primary liquefying, centrifugal separation, homogenizing, washing, centrifuging, enzymolysis, enzyme inactivation, screen separation, washing, centrifuging, drying, crushing and packing so as to obtain the rice protein. The method overcomes the defects that the high-concentration alkali liquor has damage effect on rice protein amino acid in an alkali extraction process, the quality of the extracted rice protein is poor, and the purity and sanitary index of the extracted protein cannot reach the edible standard; and in other methods for extracting the rice protein by using enzyme preparations, the rice milk is liquefied at a temperature of over 95 DEG C and then is dried at the high temperature, so the rice protein is denatured, the color is darkened, and the function of the rice protein is damaged. The extracting method of the invention keeps good physical functionality of the rice protein, implements industrialization of the extraction and production of the rice protein, and meanwhile improves the production conversion rate and quality of rice starch sugar.

Description

technical field [0001] The invention relates to a method for extracting rice protein from rice. Background technique [0002] Among cereal proteins, the biological value (B.V.) and protein value (P.V.) of rice protein are higher than other proteins. The amino acid composition of rice protein is balanced and reasonable, and the amino acid content is high, which is unmatched by other vegetable proteins. Rice protein is recognized as a high-quality food protein, which meets the ideal model recommended by WHO / FAO. The biological value of rice protein is very high, and its nutritional value is high, comparable to that of eggs, milk, and beef. In addition, rice protein is an anti-prototype protein and will not produce allergic reactions, which is very beneficial for the production of infant food. Rice protein not only has unique nutritional functions, but also has other health functions. Recent studies have shown that rice protein can lower serum cholesterol levels. [0003] ...

AI Technical Summary

Problems solved by technology

The alkaline extraction process is simple, but the high concentration of lye has a damaging effect on the amino acids of rice protein, the color of the extracted rice protein is black, the protein content is not high, and a large amount of hydrochloric acid is consumed to adjust its isotropic point, resulting in Waste water and waste are high-polluting substances, and the purity and hygiene indicators of the extracted protein cannot meet the edible standards; other methods of extracting rice protein with enzyme preparations, the rice milk has been liquefied above 95°C and then dried at high temperature, which has denatured the rice protein and turned the color. dark, its functionality is compromised

At the same time, although high-purity rice protein can be extracted, it can only be used as a feed additive