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Method and equipment for recovering protein from starch crop processing wastewater

A technology for processing wastewater and starch, which is applied in the field of protein recovery, can solve the problems of high cost and difficulty in maintaining biological activity, and achieve the effects of low cost, high degree of automation and high separation efficiency

Active Publication Date: 2020-04-07
INST OF AGRO FOOD SCI & TECH CHINESE ACADEMY OF AGRI SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The invention provides a method and equipment for recovering protein from starch crop processing wastewater, which overcomes the difficulties of maintaining biological activity and high cost in the process of protein recovery in starch crop wastewater in the prior art by charging the starch crop protein and then collecting the crop protein. question

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  • Method and equipment for recovering protein from starch crop processing wastewater
  • Method and equipment for recovering protein from starch crop processing wastewater
  • Method and equipment for recovering protein from starch crop processing wastewater

Examples

Experimental program
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Embodiment 1

[0044] This embodiment provides a method for recovering protein from starch crop processing wastewater, including:

[0045] (1) Disperse the silicon dioxide particles in the dodecyl dimethyl betaine solution, adjust the pH to 4.9, stir, centrifuge and freeze-dry; the silicon dioxide particles and the dodecyl dimethyl betaine molar The ratio is 2:1;

[0046] (2) Add the modified silicon dioxide nanoparticles obtained in step (1) to starch crop processing wastewater, feed gas to generate foam, the concentration of silicon dioxide nanoparticles is 500mg / L, and the flow rate of feeding gas is 250mL / L min;

[0047] (3) Ultrasonic defoaming the foam generated in step (2), spray-drying, and then ultrafine pulverization, and the particle size of the crude protein extract powder after ultrafine pulverization is 100 nm.

[0048] (4) The protein crude extract powder after ultrafine pulverization is triboelectrically charged to make the protein positively charged, and the starch and oth...

Embodiment 2

[0051] figure 1 For this embodiment, a kind of equipment for recovering protein from starch crop processing wastewater is provided for implementing the method in Example 1, such as figure 1 As shown, starch crop protein extraction equipment includes:

[0052] Bubble separation unit, spray drying and crushing unit and pneumatic electrostatic friction unit;

[0053] The bubble separation unit comprises a starch crop processing wastewater storage tank 5, a foam separator 6 and a foam collector 7, and the starch crop processing wastewater storage tank 5 is provided with a feed port 4 and a discharge port 10, and the starch crop is fed by a feed pump 3 The processing wastewater is transported to the foam separator 6 through pipelines; the foam separator 6 is composed of an upper part of an elliptical sphere connected with a lower part of a cylinder, and the air inlet end is connected with an air compressor 1, a gas cylinder 8, and a rotor in sequence. The flow meter 2 and the air...

Embodiment 3

[0060] This embodiment provides a method for recovering protein from starch crop processing wastewater, combining figure 1 , the specific steps of the method are as follows:

[0061] (1) In the bubble separation unit, the potato processing wastewater containing modified silicon dioxide nanoparticles in the starch crop processing wastewater storage tank 5 enters the foam separator 6 through the feed pump 3, wherein the modified silicon dioxide nanoparticles and The concentration is 500mg / L. The gas produced by the air compressor 1 passes through the gas cylinder 8 and the air humidification cylinder 9 in turn. The flow rate of the gas is controlled by the rotameter 2 to be 250mL / min. In the foam separator 6, the foam produced by the potato processing wastewater under the action of the gas passes through the continuous The expansion and contraction flow to the spray drying and crushing unit.

[0062] Among them, the preparation method of modified silica nanoparticles is as fol...

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Abstract

The invention provides a method and equipment for recovering protein from starch crop processing wastewater. The method comprises the steps of (1) adding modified silicon dioxide nanoparticles into starch crop processing wastewater, introducing gas to generate foam, and drying foam to prepare powder, so as to obtain protein crude extract powder, wherein the modified silicon dioxide nanoparticles are obtained by modifying silicon dioxide nanoparticles with dodecyl dimethyl betaine; and (2) carrying out triboelectrification treatment on the protein crude extract powder to enable protein in the protein crude extract powder to be positively charged and other components to be uncharged or negatively charged, and carrying out protein recovery through charge difference. According to the invention, starch crop processing wastewater is prepared into foam through modified silicon dioxide, and then powder is prepared; components in the powder carry different charges in a triboelectrification manner, and then are collected; the protein recovery rate reaches 84% or above; and the protein content in the recovered powder can reach 91.2%, and at the same time the dissolvability, emulsibility and bioactive components thereof are effectively maintained.

Description

technical field [0001] The invention relates to the field of wastewater treatment, in particular to a method and equipment for recovering protein from starch crop processing wastewater. Background technique [0002] Starch crops produce a large amount of organic wastewater in the process of starch production, such as potatoes, and an average of 1 ton of starch produced will discharge about 20 tons of wastewater, which is separated from the hydrocyclone (cyclone station) on the potato starch processing line The protein content in the juice is 0.9% to 2.1%. Starch crop proteins have good foaming and emulsifying properties, and have good application prospects in the food industry. Therefore, from the perspective of improving the environment and realizing full utilization of resources, the extraction and utilization of starch crop starch wastewater protein has become an urgent problem to be solved in the starch crop starch production industry. [0003] At present, protein extr...

Claims

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Application Information

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IPC IPC(8): C07K1/14C07K1/24C02F1/58C02F101/38C02F103/32C02F101/34
CPCC02F1/58C02F2101/34C02F2101/38C02F2103/32C07K1/145C07K1/24
Inventor 刘伟胡宏海张泓张良刘倩楠樊月徐芬
Owner INST OF AGRO FOOD SCI & TECH CHINESE ACADEMY OF AGRI SCI
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