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A kind of water protein recovery process of corn starch process

A technology of corn starch and process water, applied in the direction of peptide, organic chemistry, chemical instruments and methods, etc., can solve the problems of poor effect and achieve good dispersion effect

Active Publication Date: 2020-04-17
COFCO NUTRITION & HEALTH RES INST +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Process water often contains some corn yellow powder that has not been completely removed by centrifugation. When it is continued to be used in other processes, the effect is poor. Process for removing or recovering corn yellow powder from process water

Method used

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  • A kind of water protein recovery process of corn starch process
  • A kind of water protein recovery process of corn starch process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] Present embodiment provides a kind of water protein recovery process of corn starch process, such as figure 1 shown, including the following steps:

[0048] 1) Take the overflow process water from the gluten concentrating centrifuge with a dry matter content of 1.1% and a pH value of 3.9, and use a tubular metal membrane with a pore size of 0.1 μm to concentrate and filter at 3 Bar at 50°C to obtain The first retentate and the first permeate; the first retentate is dehydrated and dried to obtain corn yellow powder;

[0049] 2) Use a roll-type organic membrane with a molecular weight cut-off of 10kDa and the membrane material is polyethersulfone, filter the first permeate obtained in the above step 1) at 4Bar and 45°C to obtain the second retentate and the second Permeate;

[0050] 3) Heat the second retentate in step 2) at 80°C for 18 minutes. At this time, a part of the soluble protein coagulates and precipitates after being heated (that is, the first protein product...

Embodiment 2

[0062] Present embodiment provides a kind of water protein recovery process of corn starch process, such as figure 1 shown, including the following steps:

[0063] 1) Take the overflow process water discharged from the gluten concentrating centrifuge with a dry matter content of 3.0% and a pH value of 4.2, and use a tubular ceramic membrane with a pore size of 1 μm to concentrate and filter at 2 Bar at 45 ° C to obtain the first A retentate and the first permeate; dehydrating and drying the first retentate to obtain corn yellow powder;

[0064] 2) Use a roll-type organic membrane with a molecular weight cut-off of 100kDa and the membrane material is polysulfone, and filter the first permeate obtained in the above step 1) at 4Bar and 35°C to obtain the second retentate and the second permeate. liquid;

[0065] 3) Heat the second retentate in step 2) at 120°C for 11s. At this time, a part of the soluble protein coagulates and precipitates after being heated (that is, the first...

Embodiment 3

[0077] Present embodiment provides a kind of water protein recovery process of corn starch process, such as figure 1 shown, including the following steps:

[0078] 1) Take the overflow process water discharged from the gluten concentrating centrifuge with a dry matter content of 2.0% and a pH value of 3.8, and use a tubular ceramic membrane with a pore size of 0.5 μm to concentrate and filter at 2 Bar at 45 ° C to obtain The first retentate and the first permeate; the first retentate is dehydrated and dried to obtain corn yellow powder;

[0079] 2) Use a roll-type organic membrane with a molecular weight cut-off of 200kDa and the membrane material is polyvinylidene fluoride, filter the first permeate obtained in the above step 1) at 3.5Bar and 40°C to obtain the second retentate and second permeate;

[0080] 3) Heat the second retentate in step 2) at 75°C for 31 minutes, at this time, a part of the soluble protein coagulates and precipitates after being heated (that is, the ...

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Abstract

The invention provides a corn starch process water protein recovery technique which comprises the following steps: 1) treating process water, which is generated in the gluten concentration step in a wet-grinding technique for producing corn starch, to obtain a first permeation solution and a first trapped fluid containing rich com gluten meal; 2) filtering the first permeation solution through a hyperfiltration membrane with the molecular weight cut-off of 10-200 kDa under the conditions of 3-4 Bar and 35-45 DEG C to obtain a second permeation solution and a second trapped fluid containing rich soluble proteins; and 3) heating the second trapped fluid at 75-150 DEG C for 0.3 second-31 minutes, coagulating to precipitate a first protein product, separating to obtain a first protein product and a separation liquid, and concentrating and drying the separation liquid to obtain a second protein product. The recovery technique overcomes the defect that the traditional technique only treats the insoluble com gluten meal in the process water generated by the gluten concentration step, can obtain the two protein products, and can enhance the yield of the com gluten meal.

Description

technical field [0001] The invention belongs to the field of comprehensive utilization and deep processing of grains, and in particular relates to a water protein recovery process of corn starch process. Background technique [0002] Corn starch is usually produced by wet milling. The corn is first purified, and then after soaking, degerming, fine grinding, washing separation, pre-concentration and other steps, the main separator is further used to separate starch and gluten water. The above-mentioned separated starch continues to be refined through the following production process, and the separated gluten water will be further concentrated by centrifuge (that is, corn flour concentration, also known as gluten concentration), this step will produce concentrated corn Yellow powder and overflow water. In continuous industrial production, the overflow water produced in this step is usually used as process water and used in other processes. Process water often contains some c...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07K1/34
Inventor 刘泽龙刘新旗裴成利孙本军孟繁丽杨佳
Owner COFCO NUTRITION & HEALTH RES INST
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