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Water recycling process of corn starch process

A technology of cornstarch and water circulation, which is applied in the field of starch processing, can solve the problems that cannot be recycled and reused, and achieve the effects of cost saving, large specific surface area and avoiding material waste

Active Publication Date: 2017-10-20
齐齐哈尔龙江阜丰生物科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The applicant's previous patented technology "treatment process for high-concentration starch wastewater" used microbial oxidation and phytoremediation to treat wastewater, and achieved good results. However, the wastewater treated by this process contains some sugars and proteins produced by microorganisms. Organic matter such as organic matter can only be used for agricultural irrigation or fertilizer preparation, etc., and cannot be recycled and reused in the starch process

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] A kind of cornstarch process water recycling technique, it comprises the steps:

[0029] The waste water produced in the cornstarch processing technology flows through multiple grids, the grid gaps of the multiple grids are gradually reduced, and then enters the sedimentation tank and is left to stand for 12 hours, wherein the bottom filler of the sedimentation tank is river sand with a thickness of 100cm, The particle size of river sand is 2mm, which can preliminarily adsorb and precipitate some flocculation impurities; then enter the chemical adsorption tank, add 10g of chemical adsorbent per cubic meter of liquid, stir at 300rpm for 20min, then stop stirring, After 48 hours of adsorption treatment, sugar, salt and other small impurities are removed by ultrafiltration membrane filtration, and the permeate is obtained, and finally enters the corn starch processing water system for reuse. The molecular weight cut-off of the ultrafiltration membrane is 200Da, the ultrafi...

Embodiment 2

[0036] A kind of cornstarch process water recycling technique, it comprises the steps:

[0037] The waste water produced in the corn starch processing technology flows through multiple grids, the grid gaps of the multiple grids are gradually reduced, and then enters the sedimentation tank and is left to stand for 18 hours, wherein the bottom filler of the sedimentation tank is river sand with a thickness of 100cm, The particle size of river sand is 1mm, which can preliminarily adsorb and precipitate some flocculation impurities; then enter the chemical adsorption tank, add chemical adsorbent in an amount of 20g per cubic meter of liquid, stir at 300rpm for 20min, and then stop stirring, After 24 hours of adsorption treatment, sugar, salt and other small impurities are removed by ultrafiltration membrane filtration, and the permeate is obtained, and finally enters the corn starch processing water system for reuse. The ultrafiltration membrane is PP, the molecular weight cut-off...

Embodiment 3

[0044] The present invention process waste water effect example:

[0045] Get the starch wastewater from Fufeng production workshop, enter the sedimentation tank through the fence, detect the wastewater in the sedimentation tank, and record it as the wastewater index before treatment; take embodiment 1 as the experimental group, and control group 1 as: adopt ferric chloride adsorbent , all the other with embodiment 1; Control group 2 is: adopt activated carbon as adsorbent, all the other are with embodiment 1; Control group 3: adopt the adsorbent prepared by mixing ferric chloride and activated carbon according to the mass ratio of 1:1, all the other are with implementation example 1. The specific test results are shown in Table 1:

[0046] Table 1

[0047]

[0048] Conclusion: The process of the present invention has a good treatment effect, and the purification and adsorption level of the adsorbent is significantly better than that of the conventional adsorbents ...

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Abstract

The invention belongs to the technical field of starch processing and discloses a water recycling process of a corn starch process. The water recycling process includes following steps: enabling wastewater generated in the corn starch processing technique to flow through multiple grids; enabling the wastewater to enter a precipitation tank, and standing; enabling the wastewater to enter a chemical adsorption tank, adding a chemical adsorbent, and stirring; stopping stirring, and performing adsorption treatment; filtering through an ultrafiltration membrane to obtain permeate; enabling the permeate to enter a corn starch processing water system for reusing. The water recycling process has the advantages of low investment expense, simplicity in operation and maintenance, capability of allowing outgoing water to stably reaching standards and capability of recycling the wastewater, and the wastewater can be recycled, so that water resources are saved, environment pollution caused by the wastewater is avoided, and the water recycling process kills two birds with one stone.

Description

technical field [0001] The invention relates to the technical field of starch processing, in particular to a water recycling process for corn starch process. Background technique [0002] Corn starch, also known as corn starch, commonly known as Liugu powder, is a white powder with a slight yellowish tinge. It is usually made by impregnating corn with 0.3% sulfurous acid, and then crushing, sieving, precipitating, drying, grinding and other processes. Ordinary products contain a small amount of fat and protein. Strong hygroscopicity, the highest can reach more than 30%. The use of corn as an industrial raw material is the main channel for corn consumption. Corn is not only the king of feed, but also the industrial raw material with the most uses, the most developable products, and the largest amount of food crops. Using corn as raw material to produce starch can obtain the product with the best chemical composition and the lowest cost, and its added value is dozens of tim...

Claims

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Application Information

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IPC IPC(8): C02F9/02B01J20/08B01J20/30C02F103/32C02F101/30
CPCB01J20/08C02F1/001C02F1/28C02F9/00C02F2001/007C02F2101/30C02F2103/32
Inventor 王峰唐永强杜学忠董力青
Owner 齐齐哈尔龙江阜丰生物科技有限公司
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