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Method for increasing yield of corn starch

A technology of corn starch and corn kernels, applied in the biological field, can solve the problems of difficult separation of starch and protein, negative environmental impact, shortening of soaking time, etc., and achieve the effects of saving industrial procedures, maintaining enzyme activity, and reducing soaking time

Inactive Publication Date: 2020-04-10
HULUNBEIER NORTHEAST FUFENG BIOTECHNOLOGIES CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Chinese patent CN107353353A adds lactic acid to the soaking liquid to cooperate with sulfurous acid, which can shorten the soaking time, but the use of lactic acid can only accelerate the softening speed of the seed coat and endosperm of corn, which is more conducive to SO2 absorption, but it cannot replace SO2, and excess lactic acid can cause protein denaturation, making it more difficult to separate starch and protein
Chinese patent CN101824092A added a compound enzyme preparation, which can eliminate the addition of SO2, and the yield and quality of starch are not much different from the conventional method, but the cost of enzymatic processing is high, and the stability is poor, and it is easily affected by the type of substrate. , temperature, pH and other conditions, the burden on enterprises is greatly increased
These methods are complex to operate in practice, cost high, and have certain negative impacts on the environment

Method used

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  • Method for increasing yield of corn starch
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  • Method for increasing yield of corn starch

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] A method for improving cornstarch yield, comprising the steps of:

[0033] Put the corn kernels into the soaking tank, then add 0.3% (w / v) citric acid aqueous solution to the soaking tank, the addition amount is: corn kernels: citric acid aqueous solution = 1kg: 1.5L, soak for 8h, then microwave for 4min, The microwave power is 300W, stop the microwave, then add acid protease (20000U / g), the addition amount is 200U / L, and enzymatically hydrolyze at 45°C for 6h. Corn starch is obtained by crushing and separating the germ, refining, sieving, centrifuging, washing, dehydrating and drying.

[0034] Specifically, cornstarch can be prepared by referring to the conventional process:

[0035] Crush and separate the germ:

[0036] The purpose of coarse crushing is mainly to break the soaked corn into small pieces of more than 10 pieces in order to separate the germ.

[0037] Grinding and sieving:

[0038] The mixture of corn fragments and part of the starch after separation ...

Embodiment 2

[0044] A method for improving cornstarch yield, comprising the steps of:

[0045] Put the corn kernels into the soaking tank, then add 0.25% (w / v) citric acid aqueous solution to the soaking tank, the addition amount is: corn kernels: citric acid aqueous solution = 1kg: 2L, soak for 8h, then microwave for 6min, microwave The power is 300W, stop the microwave, then add acid protease (20000U / g), the addition amount is 300U / L, enzymolysis at 45°C for 4 hours; after crushing and separating germ, fine grinding, sieving, centrifugal separation, washing, dehydration and drying to obtain cornstarch.

Embodiment 3

[0056] The cornstarch yield comparison of embodiment 1-2, comparative example 1-3.

[0057] The calculation method of corn starch yield refers to the conventional method, specifically, the following method can be referred to:

[0058] D=(X 2 / X 1 )×100%

[0059] In the formula, D is the yield of corn starch; X 2 is the quality of cornstarch; X 1 dry weight of corn.

[0060] The starch content in the corn grains of the present invention is 72.1%, and the starch processing procedures of each group are completely the same and comparable; the specific results are shown in Table 1:

[0061] Table 1

[0062] group Corn starch yield % Example 1 69.86 Example 2 69.71 Comparative example 1 65.49 Comparative example 2 61.32 Comparative example 3 67.15

[0063] Through the comparison of each comparative example, it is found that the yield of cornstarch in the present invention is the highest, which can reach 69.86%, which is significan...

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Abstract

The invention belongs to the technical field of biology, and particularly discloses a method for increasing the yield of corn starch. The method comprises the following steps: 1) pumping corn kernelsinto a soaking tank, adding an acid solution for soaking and then performing microwave treatment; 2) adding protease into the soaking tank for enzymolysis treatment, and optionally, 3) entering a starch processing procedure. Corn starch is subjected to soaking and multi-stage separation and purification procedures so that the starch yield is increased, the industrial process is saved and the industrial energy consumption is reduced.

Description

technical field [0001] The invention belongs to the field of biotechnology, and in particular relates to a method for improving the yield of cornstarch. Background technique [0002] Corn starch, also known as corn starch, commonly known as Liugu powder, is a white powder with a slight yellowish tinge. The starch content in corn is generally about 70-75%. Corn starch is made by soaking corn with 0.3% sulfurous acid and then crushing, sieving, precipitating, drying, and grinding. Ordinary products contain a small amount of fat and protein. [0003] Corn starch has a wide range of uses, and can be used in the preparation of starch sugar, microbial fermentation to prepare active substances such as amino acids and antibiotics, and in the field of food and medicine. 1. Starch sugar is the product with the largest output of starch deep processing. It is mainly a food additive, and it is also an industrial raw material. As a raw material for downstream products, such as glucose,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08B30/02C08B30/04
CPCC08B30/02C08B30/044
Inventor 刘世周赵兰坤李树标王小平刘少堂毛松举刘庆波
Owner HULUNBEIER NORTHEAST FUFENG BIOTECHNOLOGIES CO LTD
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