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Method for extracting pea molasses and pea protein isolate from pea starch production wastewater

A technology for pea protein separation and waste water production, which is applied in the fields of application, food preparation, food science, etc., can solve the problems of underutilization of waste water, impact on functional purity, and low protein yield, so as to increase animal feed intake, Effect of improving feed palatability and reducing production cost

Active Publication Date: 2014-01-01
YANTAI ORIENTAL PROTEIN TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The wastewater generated during the production of pea starch contains a large amount of nutrients such as protein, dietary fiber, and oligosaccharides. If it is discharged directly, it will seriously waste resources and pollute the environment.
In recent years, the research on the method of extracting pea protein isolate is increasing day by day. In the prior art, the method of alkali-dissolving and acid-precipitating is mainly used to extract pea protein from the waste water of starch production. It has the following disadvantages: 1. The purity of the pea protein isolate produced is generally below 85%, the product purity is low, and the functionality is affected by the purity; 2. The existing extraction method of pea protein isolate is limited by process parameters and equipment conditions, and the protein yield is relatively low. 3. The waste water after extracting the protein isolate is not fully utilized and is discharged directly, resulting in a serious waste of resources

Method used

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  • Method for extracting pea molasses and pea protein isolate from pea starch production wastewater
  • Method for extracting pea molasses and pea protein isolate from pea starch production wastewater
  • Method for extracting pea molasses and pea protein isolate from pea starch production wastewater

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Put the starch slurry in the premix tank, pour the prepared dilute lye into the premix tank evenly while stirring, adjust the pH value of the slurry to 11.0, control the extraction temperature at 35°C, and extract for 30 minutes to make the protein fully dissolve. Then pump the mixed solution to a decanter centrifuge for centrifugation, pour the separated protein-rich solution into a precipitation tank, slowly add dilute hydrochloric acid while stirring, adjust the pH to 4.0, and precipitate the protein. The precipitation time is 30 minutes. The precipitated liquid is separated by a stacked plate centrifuge to obtain whey and primary curd containing protein. Pump the whey into the whey neutralization tank, slowly add dilute lye while stirring, adjust the pH to 6.8, inject the neutralized whey into the vacuum concentration equipment for concentration, reduce the water content to 45%, and concentrate The liquid is homogenized with a homogenizer, and a brown syrupy substa...

Embodiment 2

[0027] Put the starch slurry in the premix tank, pour the prepared dilute lye into the premix tank evenly while stirring, adjust the pH value of the slurry to 11.5, control the extraction temperature at 30°C, and extract for 60 minutes to make the protein fully dissolve. Then pump the mixed solution to a decanter centrifuge for centrifugation, pour the separated protein-rich solution into a precipitation tank, slowly add dilute hydrochloric acid while stirring, adjust the pH to 4.0, and precipitate the protein. The precipitation time is 20 minutes. The precipitated liquid is separated by a stacked plate centrifuge to obtain whey and primary curd containing protein. Pump the whey into the whey neutralization tank, slowly add dilute lye while stirring, adjust the pH to 7.2, inject the neutralized whey into the vacuum concentration equipment for concentration, reduce the water content to 47%, concentrate The liquid is homogenized with a homogenizer, and a brown syrupy substance-...

Embodiment 3

[0029] Put the starch slurry in the premix tank, pour the prepared dilute lye into the premix tank evenly while stirring, adjust the pH value of the slurry to 12.4, control the extraction temperature at 40°C, and extract for 40 minutes to make the protein fully dissolve. Then pump the mixed solution to a decanter centrifuge for centrifugation, pour the separated protein-rich solution into the precipitation tank, slowly add dilute hydrochloric acid while stirring, adjust the pH to 4.5, and precipitate the protein. The precipitation time is 30 minutes. The precipitated liquid is separated by a stacked plate centrifuge to obtain whey and primary curd containing protein. Pump the whey into the whey neutralization tank, slowly add dilute lye while stirring, adjust the pH to 7.5, inject the neutralized whey into the vacuum concentration equipment for concentration, reduce the water content to 55%, and concentrate The liquid is homogenized with a homogenizer, and a brown syrupy subs...

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Abstract

The invention discloses a method for extracting pea molasses and pea protein isolate from pea starch production wastewater. The method comprises the steps in sequence of protein extraction, acid sedimentation separation, washing separation, neutralization, whey concentration, flash distillation for sterilization, drying and powder-sieving. The extraction method can improve the purity and yield of pea protein isolate efficiently; wastewater generated from the production of pea protein isolate is collected for extracting pea molasses for use, so that the wastewater is fully utilized, and resource waste and environment pollution are alleviated. The pea protein isolate produced by the method has the content of more than 90%, has quite high water-retaining property and oil absorption capacity, and has gel formability better than that of soybean protein isolate. The pea molasses produced by the method is a brown syrup-shaped substance with the content of total sugar within 50%-60%, and has relatively great application prospect in the aspects of foods, medicines and light industry.

Description

technical field [0001] The invention specifically relates to a method for extracting pea molasses and pea protein isolate from waste water produced in the process of processing pea starch. Background technique [0002] At present, most of the processing of peas by domestic enterprises is still in the stage of producing starch and making vermicelli. The wastewater generated during the production of pea starch contains a large amount of nutrients such as protein, dietary fiber, and oligosaccharides. If it is discharged directly, it will seriously waste resources and pollute the environment. In recent years, the research on the method of extracting pea protein isolate is increasing day by day. In the prior art, the method of alkali-dissolving and acid-precipitating is mainly used to extract pea protein from the waste water of starch production. It has the following disadvantages: 1. The purity of the pea protein isolate produced is generally below 85%, the product purity is lo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A23J1/16A23L1/09A23L29/30
Inventor 赵立亭
Owner YANTAI ORIENTAL PROTEIN TECH
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