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Method for recovering soybean protein from soybean whey waste water

A technology for soybean whey wastewater and soybean protein powder, applied in the field of protein recovery, can solve the problems of high operation and management costs, huge investment in wastewater treatment facilities, waste, etc., and achieve the effects of large intangible value, reducing pressure, and improving comprehensive benefits.

Inactive Publication Date: 2018-06-22
LINYI YUWANG VEGETABLE PROTEIN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Although the above methods meet the national wastewater discharge standards, a large amount of useful substances in the wastewater have been disposed of, which is undoubtedly a great waste in terms of resource utilization.
Moreover, the investment in wastewater treatment facilities is huge, and the operation and management costs are high

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0029] A method for recovering protein from soybean whey wastewater, comprising the steps of:

[0030] (1) The pH of soybean whey wastewater is adjusted to 7.3 by adding a 5% mass concentration of NaOH solution, and then concentrated to 1% of the original liquid using a vacuum separator;

[0031] (2) adjusting the protein concentration of the concentrated bean clear solution in step (1) to 16%, and spray-drying to obtain the soybean protein powder.

Embodiment 2

[0033] A method for recovering protein from soybean whey wastewater, comprising the steps of:

[0034] (1) The pH of the soybean whey wastewater is adjusted to 9.0 by adding a 5% mass concentration of NaOH solution, and then concentrated to 0.5% of the original liquid using a vacuum separator;

[0035] (2) adjusting the protein concentration of the soy milk concentrated solution concentrated in step (1) to 12%, and spray drying to obtain the soybean protein powder.

Embodiment 3

[0037] A method for recovering protein from soybean whey wastewater, comprising the steps of:

[0038] (1) The pH of the soybean whey wastewater is adjusted to 8.0 by adding a 5% mass concentration of NaOH solution, and then concentrated to 2% of the original liquid using a vacuum separator;

[0039] (2) adjust the protein concentration of the concentrated bean clear solution in step (1) to 14%, and spray dry to obtain the soybean protein powder.

[0040] The soybean protein powder prepared by the invention has yellow color and slightly salty taste.

[0041] If the soybean whey wastewater is adjusted to be acidic in step (1), the concentrated wastewater needs to be further treated, thereby increasing the production cost. It is best to adjust to weak alkaline. If the adjusted alkaline is high, such as above 9, the product will turn black and affect the color of the product.

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Abstract

The invention relates to a method for recovering soybean protein from soybean whey waste water. The method comprises the following steps: (1) adjusting the pH of the soybean whey waste water to be alkaline and then concentrating; and (2) adjusting the protein concentration of the legumelin concentrated liquid concentrated in the step (1) to 12 to 16 percent and spray-drying to obtain he soybean protein powder. The method provided by the invention can guarantee safe discharge of the waste water, can realize complete utilization of resources and has important economic effect and social benefit.

Description

technical field [0001] The invention relates to a method for recovering protein from soybean whey wastewater, belonging to the technical field of soybean protein recovery. Background technique [0002] Soy whey wastewater is the process wastewater discharged during the production of soybean protein (soy protein concentrate or protein isolate). The production of soybean protein concentrate and isolate protein is based on low-temperature defatted soybean meal. The production of soybean protein concentrate generally undergoes processes such as acid precipitation, alcohol precipitation, and heat treatment to achieve protein precipitation and separation. The production of soybean protein isolate generally uses alkali-soluble acid precipitation. Law. The process wastewater produced by the alkali-soluble acid precipitation method, that is, soybean whey wastewater, contains 0.4-0.6% protein, and mainly high water-soluble soybean whey protein and soybean whey globulin. [0003] At ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07K1/14C02F1/66
CPCC02F1/66C07K1/14
Inventor 马军石真勇崔玉涛石善勇
Owner LINYI YUWANG VEGETABLE PROTEIN
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