A method for recovering protein from potato starch processing wastewater

A technology for potato starch and processing wastewater, applied in the field of protein recovery, can solve problems such as low protein recovery rate, and achieve the effects of increasing purity, avoiding changes in properties and structures, and improving extraction rate

Active Publication Date: 2021-05-14
赵 博
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The invention aims to solve the technical problem of low protein recovery rate in potato starch processing wastewater

Method used

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  • A method for recovering protein from potato starch processing wastewater

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Effect test

Embodiment 1

[0057] The present embodiment provides a kind of method that reclaims protein from potato starch processing waste water, comprises the steps:

[0058] 1.1 Potato starch processing wastewater contains a large amount of water-soluble protein, fiber and residual starch, etc., first put the potato starch processing wastewater in the sedimentation tank for 4-6 hours, and then filter it with a centrifugal sieve with a pore size of 50um to obtain pretreatment Wastewater, to remove fiber and other solid non-protein impurities in the potato starch processing wastewater to ensure the purity of the extracted protein;

[0059] 1.2 Add sodium alginate and sodium bicarbonate solution to the pretreated wastewater, and the mass ratio of sodium bicarbonate in the sodium alginate and sodium bicarbonate solution is 1:2, adjust the pH of the pretreated wastewater to 8.5, and Ultrasonic treatment is carried out at 30°C at an ultrasonic power of 50 Hz, and the ultrasonic treatment time is 40 minute...

Embodiment 2

[0064] The present embodiment provides a kind of method that recovers protein from potato starch processing waste water, and its recovery method is identical with embodiment 1, difference is, when preparing potato protein solution, adopt following steps:

[0065] Add sodium alginate and sodium bicarbonate solution to the pretreated wastewater, and the mass ratio of sodium bicarbonate in the sodium alginate and sodium bicarbonate solution is 1:2, adjust the pH of the pretreated wastewater to 9, and Ultrasonic treatment is performed at an ultrasonic power of 60 Hz at ℃, and the ultrasonic treatment time is 30 minutes to obtain a primary treatment solution, which is centrifuged to obtain a primary alkali precipitation and a primary alkaline solution; according to the primary alkali precipitation and water, the ratio of material to liquid is 1g : 2ml mixed evenly to prepare a mixed solution, add sodium alginate and sodium carbonate solution to the mixed solution, and the mass ratio...

Embodiment 3

[0067] The present embodiment provides a kind of method that recovers protein from potato starch processing waste water, and its recovery method is identical with embodiment 1, difference is, when preparing potato protein solution, adopt following steps:

[0068] Add sodium alginate and sodium bicarbonate solution to the pretreated wastewater, and the mass ratio of sodium bicarbonate in the sodium alginate and sodium bicarbonate solution is 1:1, adjust the pH of the pretreated wastewater to 8, and Ultrasonic treatment is performed at an ultrasonic power of 50 Hz at ℃, and the ultrasonic treatment time is 60 minutes to obtain a treatment solution, which is centrifuged to obtain a first alkali precipitation and a first alkali solution; according to the first alkali precipitation and water, the ratio of material to liquid is 1g : 4ml mixed evenly to prepare a mixed solution, add sodium alginate and sodium carbonate solution to the mixed solution, and the mass ratio of sodium carbo...

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Abstract

The invention provides a method for recovering protein from potato starch processing wastewater, comprising: subjecting the potato starch processing wastewater to static precipitation and filtering to obtain pretreated wastewater; adding alkali to the pretreated wastewater to adjust the pH of the pretreated wastewater And carry out ultrasonic treatment, obtain alkali solution, separate alkali solution, obtain potato protein solution; Add acid to potato protein solution, adjust the pH of potato protein solution and carry out acid precipitation treatment, through separation, obtain potato protein I and acid precipitation supernatant The acid precipitation supernatant was filtered through an ultrafiltration membrane to obtain potato protein II; the potato protein I, potato protein II and water were mixed to obtain a potato protein slurry, and the pH of the potato protein slurry was adjusted and compound enzymes were added for enzymatic hydrolysis Treating to obtain an enzymatic hydrolysis product, and treating the enzymatic hydrolysis product to obtain potato protein. The method solves the problem of low protein recovery rate in potato starch processing wastewater.

Description

technical field [0001] The invention relates to the technical field of protein extraction, in particular to a method for recovering protein from potato starch processing wastewater. Background technique [0002] As a common crop, potato is rich in various nutrients needed by the human body and is the fourth largest food crop. Potato starch contains low protein and compound content. It is a high-quality starch with a storage time of up to 70 years. The above advantages make the potato starch processing industry have a large demand and a good development prospect. With the increasing market demand for potato starch, my country's potato starch processing industry has also developed rapidly. [0003] The production of potato starch mainly adopts the centrifugal sieve method, and a large amount of wastewater rich in potato protein is produced during the production process. The current potato starch production process cannot completely extract a large amount of protein and starch...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07K1/14C07K1/30C07K1/34C12P21/06
CPCC07K1/145C07K1/30C07K1/34C12P21/06
Inventor 赵博
Owner 赵 博
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