Acid precipitation system for soybean protein isolate and acid precipitation method of soybean protein isolate

Abstract

The invention belongs to the technical field of production of soybean protein isolate, in particular relates to an acid precipitation system for the soybean protein isolate, and further discloses an acid precipitation method of the soybean protein isolate. The acid precipitation system comprises an acid precipitation tank and a precipitation tube bundle which are sequentially connected; spacer plates with flow through holes in different positions are additionally arranged on the acid precipitation tank, so that a flow path of acid precipitate liquid in a reaction cavity can be changed, the flocculation time of the acid precipitate liquid is further prolonged, the pH value stability rate of the acid precipitate liquid is accordingly increased, and the extraction efficiency of a final product is further increased; the precipitation tube bundle is used for enhancing the effect of flocculation-precipitation, and is beneficial to protein molecular flocculation so as to enlarge protein particles and further enhance the flocculation effect, so that a material is easier to separate in subsequent centrifugal treatment, protein loss in legumelin is effectively reduced, and the protein yieldis increased.

Description

technical field [0001] The invention belongs to the technical field of soybean protein isolate production, specifically relates to an acid sedimentation system for soybean protein isolate, and further discloses an acid sedimentation method for soybean protein isolate. Background technique [0002] Soybean Protein Isolate is a full-price protein food additive produced from low-temperature desolvated soybean meal. Soybean protein is a high-molecular organic polymer composed of a series of amino acids combined through peptide bonds. It is mainly composed of albumin and globulin, of which albumin accounts for about 5% and globulin accounts for about 90%. The protein content of soybean protein isolate is more than 90%, there are nearly 20 kinds of amino acids, and it contains a variety of essential amino acids for human body. Soy protein isolate is rich in nutrition and does not contain cholesterol. It is one of the few varieties of plant protein that can replace animal protein....

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Problems solved by technology

But, on the one hand, due to the single flow direction of the protein solution in the acid precipitation tank, the contact time between the flocculant and the protein solution is short and the contact area is small, resulting in inhomogeneous mixing of the fluid, resulting in an uneven pH value of the mixed solution. Stable, poor separation effect, which seriously affects the acid precipitation effect and protein extraction recovery efficiency; on the other hand, the material in the acid precipitation tank only plays a role of sufficient mixing, and cannot fully flocculate the protein molecules to increase the particle size. When the material enters the centrifuge in the form of suspension, due to its small molecular weight, it is not easy to settle under the action of centrifugal force, which affects the separation effect of the separator, causes the protein to be lost with the clear water of beans, resulting in a decrease in yield, and increases the difficulty of downstream sewage treatment.

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