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Porous starch and joint preparation method for liquid glucose used for fermentation thereof

A technology of porous starch and joint preparation, which is applied in the fields of food and chemical industry, can solve the problems of increased viscosity, etc., and achieve the effect of increasing content and good economy

Inactive Publication Date: 2013-04-24
SOUTH CHINA UNIV OF TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] However, due to the influence of starch milk concentration viscosity and the limitation of stirring equipment, the starch milk mass concentration when producing porous starch can generally reach 45% (w / w, the dry matter quality of solid starch / solid starch dry matter quality Add the quality of water), above the concentration of starch milk system, every time the concentration of one percentage point is increased, the increase rate of its viscosity is all sharply increased. When the concentration of starch milk reaches 50% (w / w) or more, "starch milk "has become lumpy

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-1

[0050] (1) Sizing: 1000 parts by weight of dry cornstarch are mixed with water, the milk concentration is 35.0% (w / w), the temperature is raised to 55°C, and the starch is adjusted with a hydrochloric acid solution with a volume concentration of 10% (v / v). Milk pH is 4.1-4.3.

[0051] (2) Enzymolysis of porous starch: Stir and add 5 parts by weight of AMG-type glucoamylase into the starch milk, maintain the temperature and pH of the system, and perform enzymolysis for 5 hours, with a hydrolysis rate of 20.4%.

[0052] (3) deliquoring, washing, drying: the pumped material is passed through a centrifugal filter to remove the starch hydrolyzate, and then wash with 200 parts by weight of water, the washed water is mixed with the removed starch hydrolyzate, and the mixed solution is dried The solid concentration is 9.6% (w / w), and it is also used for starch slurrying of amylase sugar production. The washed porous starch is transported to the air dryer for drying, crushed and sieve...

Embodiment 1-2

[0055] (1) Sizing: the cornstarch of 1000 dry weight parts is mixed with water, the milk concentration is 35.0% (w / w), the temperature is raised to 55 ° C, and the pH of the starch milk is adjusted with 10% (v / v) hydrochloric acid solution. 4.1~4.3.

[0056] (2) Enzymatic hydrolysis of porous starch: Stir and add 5 parts by weight of AMG-type glucoamylase into the starch milk, maintain the temperature and pH of the system, and carry out enzymatic hydrolysis for 20 hours, with a hydrolysis rate of 53.3%.

[0057](3) deliquoring, washing, drying, etc.: pump the material through a centrifugal filter, remove the starch hydrolyzate, and then wash with 500 parts by weight of water for 3 times, mix the washed water with the removed starch hydrolyzate, mix The dry solid concentration of the liquid is 20.0% (w / w), and it is also used for starch slurrying of amylase sugar production. The washed porous starch is transported to the air dryer for drying, crushed and sieved, the water cont...

Embodiment 1-3

[0059] (1) Sizing: the cornstarch of 1000 dry weight parts is mixed with water, the milk concentration is 35.0% (w / w), the temperature is raised to 55 ° C, and the pH of the starch milk is adjusted with 10% (v / v) hydrochloric acid solution. 4.1~4.3.

[0060] (2) Enzymatic hydrolysis of porous starch: Stir and add 5 parts by weight of AMG-type glucoamylase into the starch milk, maintain the temperature and pH of the system, and carry out enzymatic hydrolysis for 30 hours, with a hydrolysis rate of 62.6%.

[0061] (3) deliquoring, washing, drying, etc.: pump the material through a centrifugal filter, remove the starch hydrolyzate, and then wash with 500 parts by weight of water for 3 times, mix the washed water with the removed starch hydrolyzate, mix The dry solid concentration of the liquid is 22.5% (w / w), and it is also used for starch slurrying of amylase sugar production. The washed porous starch is transported to the air dryer for drying, crushed and sieved, the water con...

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Abstract

The invention relates to porous starch and a joint preparation method for liquid glucose used for fermentation of the porous starch. The joint preparation method comprises the steps of size mixing 1000 parts by dry weight of starch raw materials with water, regulating the concentration of starch milk to be 40%-50% and the potential of hydrogen (pH) of 4.0-6.0, under condition of the temperature of 30 DEG C-55 DEG C, adding 0.5-5.0 parts by weight of amylase, stirring for 5-30 hours for enzymolysis, exhausting the liquid, washing, drying, smashing and obtaining solid powdery porous starch, utilizing enzymolytic liquid glucose and washing liquid in the process of preparation of the porous starch for size mixing of the starch, liquefying, saccharifying, transforming protein, filtering, concentrating and carrying out other procedures. According to the joint preparation method, enzymolysis of glucose amylase or composite saccharifying enzyme is utilized for preparation of the porous starch, the sugar component of starch hydrolysate is mainly glucose, and products with glucose as main composition are generated. If beta-amylase or fungus amylase is utilized, or the beta-amylase or fungus amylase is carried out saccharification with debranching enzyme, products with maltose as main composition are generated.

Description

technical field [0001] The invention relates to a preparation method of starch syrup and porous starch in the fields of food and chemical industry, in particular to a joint preparation method of porous starch and nitrogen-containing starch syrup for food fermentation with glucose or maltose as the main sugar component. Background technique [0002] Porous starch refers to the modified starch that has been artificially processed to make the particles porous. It has a large specific surface area and is mainly used as a carrier for adsorption. Compared with other adsorbents, porous starch not only has good adsorption performance, but also has the following advantages: (1) wide source of raw materials, cheap and easy to get; (2) pure natural material, safe, non-toxic, and the dosage is not limited ; (3) biodegradable; (4) simple production process; (5) wide application and strong adaptability. In the process of preparing porous starch, not only the pore size, pore depth and spe...

Claims

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Application Information

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IPC IPC(8): C12P19/20C12P19/14C12P19/04C12P19/02C12P19/22C12P19/16C12P19/12
Inventor 黄立新徐正康罗建勇周彦斌尹寿伟王立亚
Owner SOUTH CHINA UNIV OF TECH
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