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Method for reducing crude protein (CP) of second-extracted soybean residues in isolated protein

A technology for separating protein and crude protein, applied in the field of food processing, can solve the problems of affecting the removal rate of bean dregs CP, affecting the secondary dissolution effect, and uneven pH value, so as to reduce production costs, reduce CP content, and improve product yield. Effect

Active Publication Date: 2018-12-28
KEDONG YUWANG SOY PROTEIN FOOD CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the short retention time of alkali addition in the second alkali addition tank and the uneven pH value, it will affect the secondary dissolution effect, and further affect the removal rate of bean dregs CP

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] The method for reducing the CP of the isolated protein two slag described in the present embodiment comprises the steps:

[0036] (1) Add the prepared process water at 40-43°C to the extraction tank, add liquid caustic soda, the pH of the alkaline water is controlled between 11±0.5, and add edible low-temperature soybean meal, the ratio of soybean meal to water is 1:8.21, The pH of the feed liquid is controlled between 7.0-7.5, and the dissolving time is 30 minutes (the amount of alkali added is 13.5±0.5kg). The first-extraction separator, after being centrifuged at a high speed by the centrifuge, separates the feed liquid into solid and liquid, and the solid is pushed out by the inner screw of the separator to become a first-extraction bean dregs, and the liquid will flow out from the overflow port, which is called a first-extraction soybean milk;

[0037] (2) According to the mass ratio of 1:5, dilute and dissolve the first-extracted bean dregs obtained in step (1) wi...

Embodiment 2

[0039] The method for reducing the CP of the isolated protein two slag described in the present embodiment comprises the steps:

[0040] (1) Add the prepared 40-43°C process water into the extraction tank, add liquid caustic soda, control the pH of the alkaline water between 11±0.5, add edible low-temperature soybean meal, the ratio of soybean meal to water is 1:8, The pH of the feed liquid is controlled between 7.0-7.5, and the dissolving time is 30 minutes (the amount of alkali added is 13.5±0.5kg). The first-extraction separator, after being centrifuged at a high speed by the centrifuge, separates the feed liquid into solid and liquid, and the solid is pushed out by the inner screw of the separator to become a first-extraction bean dregs, and the liquid will flow out from the overflow port, which is called a first-extraction soybean milk;

[0041] (2) According to the mass ratio of 1:2, dilute and dissolve the first-extracted bean dregs obtained in step (1) with water, and ...

Embodiment 3

[0043] The method for reducing the CP of the isolated protein two slag described in the present embodiment comprises the steps:

[0044] (1) Add the prepared 40-43°C process water into the extraction tank, add liquid caustic soda, control the pH of the alkaline water between 11±0.5, add edible low-temperature soybean meal, the ratio of soybean meal to water is 1:9, The pH of the feed liquid is controlled between 7.0-7.5, and the dissolving time is 30 minutes (the amount of alkali added is 13.5±0.5kg). The first-extraction separator, after being centrifuged at a high speed by the centrifuge, separates the feed liquid into solid and liquid, and the solid is pushed out by the inner screw of the separator to become a first-extraction bean dregs, and the liquid will flow out from the overflow port, which is called a first-extraction soybean milk;

[0045] (2) According to the mass ratio of 1:10, dilute and dissolve the bean dregs obtained in step (1) with water to dissolve the bean...

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PUM

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Abstract

The invention relates to a method for reducing CP of second-extracted soybean residues in isolated protein. The method comprises the following steps: (1) dissolving soybean meal in water and adding alkali to extract and then performing solid-liquid separation to obtain first-extracted soybean milk and first-extracted soybean residues; (2) adding water to the first-extracted soybean residues obtained in the step (1) and adjusting pH, then carrying out grinding and shear treatment, and solid-liquid separation to obtain second-extracted soybean milk and the second-extracted soybean residues. According to the invention, the soybean meal is dissolved uniformly through adding the alkali for the second time and then subjected to grinding and shear treatment for the second time to realize secondary separation, therefore, CP in the soybean residues is redissolved and sheared to lower CP of the second-extracted soybean residues so as to improve the yield and lower the cost.

Description

technical field [0001] The invention belongs to the technical field of food processing, and in particular relates to a method for reducing the crude protein (CP) of isolated protein secondary extraction from bean dregs by using the secondary alkali addition and secondary shearing technology. Background technique [0002] Soybean protein is a kind of whole protein food additive produced from low temperature soybean meal. The protein content of soybean protein isolate is more than 90%, and there are nearly 20 kinds of amino acids, including amino acids necessary for the human body. It is rich in nutrition and does not contain cholesterol. It is one of the few varieties of vegetable protein that can replace animal protein. In recent years, soybean protein isolate has developed rapidly. However, the extraction rate of protein industry is currently below 45%, which is a bottleneck problem restricting the entire protein industry. Now that the market competition is so fierce, each...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07K1/14
CPCC07K1/14C07K1/145
Inventor 时秀芹
Owner KEDONG YUWANG SOY PROTEIN FOOD CO LTD