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Separation preparation method of protein in soybean protein wastewater

A technology for soybean protein wastewater and protein, which is applied in the field of separation and preparation of protein in soybean protein wastewater, can solve problems such as no literature reports on the technology, and achieve the effects of cost reduction, good economic and social benefits, and efficient recovery.

Active Publication Date: 2014-02-05
HEBEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] At present, the technology of separating and preparing protein from soybean protein wastewater into powdery protein products that can be achieved by the separation and preparation method of protein in soybean protein wastewater of this patent has not been reported in the literature

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] a. Collection and detection of soybean wastewater:

[0028] Collect and produce soybean protein wastewater, and use GB / T20371-2006 to detect that the protein concentration of the wastewater is 1.5g / L, and the pH is 4.4;

[0029] b. Pretreatment of soybean protein wastewater:

[0030] Add food-grade sodium bisulfite to the collected soybean protein wastewater, the added quality is 0.015% of the soybean protein wastewater quality, and then adjust the temperature of the soybean protein wastewater to 50-55°C;

[0031] c. Two-stage foam separation process:

[0032] The first-stage foam separation process: Foam separation of pretreated soybean protein wastewater, separated intermittently with a bubble tower, the temperature is 50-55°C, the superficial gas velocity is 1.54-1.85mm / s, and the liquid layer height is 1.3-1.4 m, the height of the foam layer is 0.6-0.8m, and the operation time of one cycle is 6.0-8.0 hours, and the first-stage defoaming liquid is obtained through ...

Embodiment 2

[0037] a. Collection and detection of soybean wastewater:

[0038]Collect and produce soybean protein wastewater, and use GB / T20371-2006 to detect that the protein concentration of the wastewater is 2.0g / L, and the pH is 4.3;

[0039] b. Pretreatment of soybean protein wastewater:

[0040] Add food-grade tert-butylhydroxyanisole to the collected soybean protein wastewater, the added quality is 0.030% of the soybean protein wastewater quality, and then adjust the temperature of the soybean protein wastewater to 55-60°C;

[0041] c. Two-stage foam separation process:

[0042] The first-stage foam separation process: Foam separation of pretreated soybean protein wastewater is carried out intermittently with a bubble tower, the temperature is 55-60°C, the superficial gas velocity is 1.45-1.54mm / s, and the liquid layer height is 1.1-1.2 m, the height of the foam layer is 0.6-0.8m, and the operation time of one cycle is 8.0-10.0 hours, and the first-stage defoaming liquid is obtai...

Embodiment 3

[0047] a. Collection and detection of soybean wastewater:

[0048] Collect and produce soybean protein wastewater, and use GB / T20371-2006 to detect that the protein concentration of the wastewater is 3.0g / L, and the pH is 4.3;

[0049] b. Pretreatment of soybean protein wastewater:

[0050] Add food-grade propyl gallate to the collected soybean protein wastewater, the added quality is 0.040% of the soybean protein wastewater quality, and then adjust the temperature of the soybean protein wastewater to 60-65°C;

[0051] c. Two-stage foam separation process:

[0052] The first-stage foam separation process: Foam separation of pretreated soybean protein wastewater, separated intermittently with a bubble tower, the temperature is 60-65°C, the superficial gas velocity is 1.20-1.23mm / s, and the liquid layer height is 0.9-1.0 m, the height of the foam layer is 0.8-0.9m, and the operation time of one cycle is 10.0-12.0 hours, and the first-stage defoaming liquid is obtained through ...

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Abstract

The invention discloses a separation preparation method of protein in soybean protein wastewater. The method comprises the following steps: (1) collecting and detecting soybean wastewater; (2) pretreating the soybean protein wastewater; (3) carrying out a two-stage foam separation technology; and (4) separating solid and liquid, and spray-drying. The method prevents protein decay during the separation process through adding antioxidants, and determines the numerical value ranges of two parameters of liquid filling height and operation time, thereby obtaining the powdery protein product. The separation preparation method provided by the invention effectively reduces the protein concentration in soybean protein wastewater, and obtained residual liquid can act as a raw material for extracting soybean oligosaccharides by a membrane separation method, so that the cost for processing soybean protein wastewater by a biochemical process and the production cost of soybean protein isolate are reduced; the separation preparation method of protein in soybean protein wastewater has favorable economical benefits and social benefits; the mass percentage of protein is 90% maximally, and the protein can act as a food-level protein product.

Description

technical field [0001] The technical scheme of the invention belongs to the field of wastewater treatment, in particular to a method for separating and preparing protein in soybean protein wastewater. Background technique [0002] Soybean protein wastewater is produced in the process of producing soybean protein isolate by alkali-soluble acid precipitation method, and its production volume is 20-30 tons per ton of soybean protein isolate, and the wastewater contains a large amount of high nutritional value, high solubility, high yield Foaming and highly emulsifying protein. At present, enterprises directly discharge soybean protein wastewater to sewage treatment plants for treatment by common biochemical methods. This not only increases the production cost of soybean protein isolate, but also causes a large amount of waste of protein in wastewater. Therefore, adopting appropriate methods to recover and utilize protein in soybean protein wastewater will produce good social ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A23J1/16
Inventor 吴兆亮李瑞刘伟
Owner HEBEI UNIV OF TECH
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