Composite plant protein and preparation methods thereof

Abstract

A method for preparing a composite plant protein, including: S1: mixing at least two kinds of plant proteins with water, adding compound alkali powder to a mixed solution and stirring, so as to obtain a protein stock solution with a pH of 10-10.5; the two kinds of plant proteins being rice protein and pea protein, or the rice protein and soy protein; and the compound alkali powder is sodium hydroxide and calcium hydroxide; S2: obtaining a protein solution with a pH of 6.8-7.0 by performing a high-pressure jet mill-ultrasonic treatment on the protein stock solution obtained from step S1, and adding citric acid to a treated protein stock solution; and S3: obtaining the composite plant protein by spray-drying the protein solution obtained from step S2.

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