Unlock instant, AI-driven research and patent intelligence for your innovation.

Method for recovering protein from soybean whey wastewater

A soybean whey wastewater and protein technology, which is applied in the field of protein recovery, can solve the problems of decreased membrane flux, low product purity, and low separation precision, and achieve the effects of reducing environmental pollution, improving comprehensive benefits, and mild operating conditions

Inactive Publication Date: 2012-07-11
HARBIN UNIV OF COMMERCE
View PDF3 Cites 7 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to solve the problem that the membrane flux will drop rapidly in only ten minutes in the membrane separation method, and the filtration molecular weight cut-off will become smaller rapidly, resulting in the inability to continue the process; both the desalination concentration process and the spray drying method have separation accuracy Low, mixed substances, low product purity, and then provide a method for recovering protein from soybean whey wastewater

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0013] A method of recovering protein from soybean whey wastewater of the present invention is implemented as follows:

[0014] The overall process is divided into several cycles.

[0015] first cycle

[0016] After pumping 10 tons of soybean whey wastewater into a 10-ton mixing tank, adjust the pH value of the soybean whey wastewater to 6.0 with 1% NaOH solution, let it stand for 2 hours, and then use a horizontal centrifuge to separate it under the condition of a separation factor of 10,000 , to remove large particles of impurities in soybean whey wastewater. Then the centrifugate is introduced into the ion exchange column at a flow rate of 2 tons / hour for desalting treatment. The ion exchange column is made of glass fiber reinforced plastic, the resin is strongly acidic cation exchange resin 001×7, and the column bed volume is 1m 3 (D=800mm, H=2000mm), the amount of wet resin is about 800 kg. The wastewater after ion exchange treatment is pumped into the reaction tank. ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention provides a method for recovering protein from soybean whey wastewater. The method comprises the following steps of: firstly, pre-purifying the soybean whey wastewater; leading a centrifuging liquid into an ion exchange column for desalting so as to remove Fe<3+>, Zn <2+> and Cu<2+> in the centrifuging liquid; cooling the material liquid to 5-10 DEG C through a plate type heat exchanger; precipitating and mixing the last heavy liquid with the former protein so that the concentration of the protein is regulated to 12-16%; and carrying out spray drying to obtain soybean protein powder. In the soybean protein, 1 / 2 of glutamic acid and 1 / 2 aspartic acid exist in an amide form, so as to provide an important basis for development of a polymerization effect of transglutaminase; the transglutaminase is a polymerase which can be used for forming a covalent compound by specific catalysis of combination reaction of epsilon-amino on lysine and gamma-oxyamide on glutamic acid in a protein through transglutaminase action. According to the invention, the recovery rate of the protein in wastewater can reach more than 87%, and the content of the protein in the protein powder obtained by drying is more than 90%.

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 produced process wastewater, ie soybean whey wastewater, contains 0.4-0.6% protein, mainly high water-soluble soybean whey protein and soybean whey globulin. [0003] At present, the soybean whey of most soybean protein producti...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): C12P21/00
Inventor 韩春然刘颖马永强张毅方
Owner HARBIN UNIV OF COMMERCE