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Method for producing corn starch with enzymic method

A technology of corn starch and corn, which is applied in the field of deep processing of corn, can solve the problems of limited separation effect and purity of isolates, high cost of deep processing and purification, and polluted process water, so as to achieve great application value, reduce additive cost, and improve economic benefits.

Inactive Publication Date: 2018-01-23
SHANDONG SHENZHOU XIANGYU TECH GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] At present, the process of enzymatically producing corn starch generally adds protease to the soaking liquid, but protease will hydrolyze part of the protein in corn starch, which will eventually lead to the loss of the most economically valuable protein in the corn starch production process, and dissolve in water The soluble protein will also pollute the discharged process water, which is not conducive to environmental protection
And the separation effect and purity of the isolate in the cornstarch production process of the prior art are limited, the cost of deep processing and purification is high, and the energy consumption (water, electricity, steam) of the isolate separation process is high and the efficiency is low

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] A method for enzymatically producing cornstarch, comprising the following steps:

[0031] (1) Raw material cleaning process: Screening, winnowing and other methods are used to clean the impurities contained in the corn. The cleaning equipment can use vibrating screens, specific gravity stone removers, permanent magnet drums and wheat washing machines, etc.;

[0032] Due to the use of general commercial corn, it is necessary to clean up the raw materials of the corn before processing. Since the commercial corn contains various dust mustard, organic and inorganic impurities, in order to ensure safe production and product quality, it is necessary to carry out the cleaning of the impurities in the corn. clean up.

[0033] (2) Preliminary soaking process: 200 parts of corn are soaked in the first soaking liquid, the soaking temperature is 58 ° C, and the soaking time is 65 hours. When the moisture in the corn is greater than 58%, the soaking liquid is discharged, and the cor...

Embodiment 2

[0046] A method for enzymatically producing cornstarch, comprising the following steps:

[0047] (1) Raw material cleaning process: Screening, winnowing and other methods are used to clean the impurities contained in the corn. The cleaning equipment can use vibrating screens, specific gravity stone removers, permanent magnet drums and wheat washing machines, etc.;

[0048] (2) Preliminary soaking process: 300 parts of corn are soaked in the first soaking liquid, the soaking temperature is 65° C., and the soaking time is 80 hours. When the moisture in the corn is greater than 58%, the soaking liquid is discharged, and the corn and the second soaking process are obtained. Soaking solution, the second soaking solution becomes corn steep liquor after being evaporated and concentrated;

[0049] (3) Secondary soaking process: 500 parts of process water in the process water tank are used to carry out re-soaking treatment in the above-mentioned corn discharged from the soaking solutio...

Embodiment 3

[0059] A method for enzymatically producing cornstarch, comprising the following steps:

[0060] (1) Raw material cleaning process: Screening, winnowing and other methods are used to clean the impurities contained in the corn. The cleaning equipment can use vibrating screens, specific gravity stone removers, permanent magnet drums and wheat washing machines, etc.;

[0061] (2) Preliminary soaking process: 270 parts of corn are soaked in the first soaking liquid, the soaking temperature is 62 ° C, and the soaking time is 71 hours. When the moisture in the corn is greater than 58%, the soaking liquid is discharged, and the corn and the second soaking process are obtained. Soaking liquid, the second soaking liquid becomes corn steep liquor after being evaporated and concentrated.

[0062] (3) Secondary soaking process: 460 parts of process water in the process water tank are used to carry out re-soaking treatment in the above-mentioned corn discharged from the soaking solution. T...

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Abstract

The invention discloses a method for producing corn starch with an enzymic method. The method comprises the following steps: (1), raw material handling; (2), primary soaking; (3), secondary soaking; (4), tertiary soaking; (5), steaming; (6), germ crushing and separating; (7), fiber precision grinding and separating; (8), centrifugal separation; (9), washing and waste removal; (10), drying; (11), crushing. The method improves the efficiency of a zymin, reduces the adding cost of the zymin, can improve the yield of corn starch, further improve the yield of protein powder, reduce the water consumption for washing, improve the washing efficiency, improve the centrifugation efficiency, further reduce the power consumption, and improve the economic benefit, thereby having the great application value.

Description

technical field [0001] The invention relates to the field of corn deep processing, in particular to a method for enzymatically producing corn starch. Background technique [0002] Corn starch is a product made from corn kernels, soaked in sulfurous acid, crushed and screened, separated and washed, dehydrated and dried. In addition to being directly used in food, papermaking, textile, medicine and other fields, corn starch is mostly used for deep processing. The starch industry is an industry that uses a large amount of corn in my country. The output of corn starch in China has been increasing year by year from 1999 to 2011. In 2009, the amount of corn starch in China reached 21.7 million tons, ranking second in the world. [0003] Starch sugar is a high-grade product made of corn starch, which has high economic value and edible value, and is widely used in food, medicine, chemical industry, fermentation and other industries. Starch sugars made from cornstarch include gluc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C12P19/04C12P19/14C12P19/16C12P19/22
Inventor 任思凯李超周忠伟袁美宏任思龙
Owner SHANDONG SHENZHOU XIANGYU TECH GRP
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