Tech. of closed water circulation in maize starch prodn. process

A processing process, corn starch technology, applied in vegetable protein processing, texturing, food science and other directions, can solve the problems of affecting starch quality, secondary pollution, large equipment investment, etc., to improve dry matter yield, reduce Water consumption, the effect of reducing water consumption

Inactive Publication Date: 2006-06-28
鲁洲生物科技(山东)有限公司
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AI Technical Summary

Problems solved by technology

[0005] After the corn is cleaned by dry method, it is put into the soaking tank. The soaking water is about 1.5-2.0m3 / ton of starch, which is mainly used for making acid. The water used in the washing process is about 4m3 / ton of starch, and the amount of water used in the swirling washing process is about 3.5m3 / ton of starch. After the starch slurry is separated and swirled, it enters the starch dehydration and drying section. At present, the most advanced wastewater treatment method in the industry is to treat the wastewater discharged from starch through anaerobic and aerobic treatment methods, but this solution requires a large investment in equipment and is prone to secondary pollution. At present, there is also a starch closed-circuit recycling process However, due to the ineffective treatment of protein and sulfurous acid in the process water, it is easy to affect the quality of starch

Method used

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  • Tech. of closed water circulation in maize starch prodn. process

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Embodiment Construction

[0016] The whole process is shown in the figure. After the corn has been cleaned, it is transported to the soaking workshop by dry method for soaking. The water used in the soaking workshop is mainly for acid production. The process water for acid production does not affect the soaking effect. After soaking, the thin corn steep liquor is evaporated by three-effect. The condensed water produced during the evaporation of corn steep liquor is returned to the process pool by adjusting the pH value to between 4-7. After soaking, the corn is sent to the grinding process with process water for grinding. The corn germ is extracted in the grinding stage, and when the germ is washed The water from the process pond and the waste water from the germ washing and squeezing process are all reused in the coarse grinding process. The fiber washing water is process water. The waste water generated during the washing and squeezing process contains a certain amount of fine fibers and cannot be direct...

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Abstract

A closed-loop cyclic utilization technology for the technological water in the procedure of preparing corn starch is disclosed. After the technological water is used to prepare sulfurous acid and immerse corn grains in it, it flows in technological water pool behind evaporation, condensing and regulating pH value. The technological water is also used for coarse grinding, fine grinding, and washing germinal buds and fibers. After two-stage air-floating separation, the water containing bran flows in protein depositing tank. The supernatant is drained in technological water pool and the protein deposit is recovered.

Description

Technical field [0001] The invention relates to the technical field of waste water recycling and reuse in a corn starch processing process. Background technique [0002] The corn starch processing process is that the corn is cleaned of impurities and sent to the soaking tank for soaking at a certain temperature. The corn is soaked with sulfurous acid aqueous solution, which can soften the corn kernels, dissolve soluble substances, and disperse the protein matrix of the embedded starch. After soaking The corn is sent to the degerming mill, the seeds are broken, the germs are freed, and the separated germs are washed and dried to obtain the finished corn germs. [0003] After fine grinding, the protein and starch adhering to the fiber are removed, and the fiber is dried after sieving and washing to obtain fiber residue. [0004] The starch milk containing starch and protein enters the separator for separation, and the separated protein is concentrated and dried...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A23J3/14A23J3/28A23L29/30
Inventor 赵玉斌刘玉春宗军战
Owner 鲁洲生物科技(山东)有限公司
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