Processing method and application of starch raw material

A technology of starchy raw materials and processing methods, applied in the direction of microorganism-based methods, biochemical equipment and methods, microorganisms, etc., can solve the problems of low enzymatic hydrolysis liquefaction liquid, affecting the production efficiency of sugar liquid, and the decrease of filtration speed, etc., to achieve The effect of reducing waste water discharge, reducing energy and equipment consumption, and reducing stratification time

Active Publication Date: 2012-01-18
COFCO BIOTECHNOLOGY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the lower the DE value of the enzymatic liquefaction solution, the lower the filtration rate, which affects the efficiency of sugar solution production.

Method used

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  • Processing method and application of starch raw material

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] 100 parts by weight of corn were pulverized to obtain a pulverized product with an average particle diameter of 400 μm, and the pulverized product was mixed with 400 parts by weight of water at 45° C. to obtain a starch slurry.

[0049] At 50°C, the starch slurry was mixed with the α-amylase of 6.4 enzyme activity units / g corn flour for 60 minutes to obtain a mixture, which was sprayed into contact with steam at 156°C in an injector (steam and mixture The weight ratio is 0.05:1), the contact time is 5 seconds, so that the temperature of the mixture after contacting with the steam is 95°C, and the laminar flow is maintained for 120 minutes to obtain a primary liquefied liquid.

[0050] The above-mentioned primary liquefied liquid is again sprayed and contacted with steam at 156°C in the injector (the weight ratio of steam to mixture is 0.05:1), and the contact time is 1 second, so that the temperature of the mixture after contacting with steam again is 135°C. ℃, and keep...

Embodiment 2

[0055] 100 parts by weight of corn were pulverized to obtain a pulverized product with an average particle diameter of 400 μm, and the pulverized product was mixed with 180 parts by weight of water at 60° C. to obtain a starch slurry.

[0056] At 50°C, the starch slurry was mixed with the α-amylase of 24 enzyme activity units / g corn flour for 100 minutes to obtain a mixture, which was sprayed into contact with steam at 160°C in an injector (steam and mixture The weight ratio is 0.1:1), the contact time is 1 second, so that the temperature of the mixture after contacting with the steam is 100° C., and the laminar flow is maintained for 180 minutes to obtain a primary liquefied liquid.

[0057] The above-mentioned primary liquefied liquid is again sprayed and contacted with steam at 160°C in the injector (the weight ratio of steam to mixture is 0.1:1), and the contact time is 3 seconds, so that the temperature of the mixture after contacting with steam again is 140 ℃, and keep a...

Embodiment 3

[0075] 100 parts by weight of corn were pulverized to obtain a pulverized product with an average particle diameter of 400 μm, and the pulverized product was mixed with 300 parts by weight of water at 50° C. to obtain a starch slurry.

[0076] At 50°C, the starch slurry was mixed with the α-amylase of 20 enzyme activity units / g corn flour for 150 minutes to obtain a mixture, which was sprayed into contact with steam at 160°C in an injector (steam and mixture The weight ratio is 0.08:1), the contact time is 3 seconds, so that the temperature of the mixture after contacting with steam is 97° C., and the laminar flow is maintained for 150 minutes to obtain a primary liquefied liquid.

[0077] The above-mentioned primary liquefied liquid is again sprayed and contacted with steam at 160°C in the injector (the weight ratio of steam to mixture is 0.08:1), and the contact time is 2 seconds, so that the temperature of the mixture after contacting with steam again is 138 ℃, and keep at ...

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Abstract

The invention provides a processing method of a starch raw material, which comprises the following steps that: (1) starch raw material powder is mixed with water to obtain starch slurry, and the starch slurry is mixed with amylase; (2) the secondary injection is carried out; (3) by flash vaporization and cooling, a liquefied liquid is obtained after the flash vaporization; (4) the liquefied fluid is in contact with a protein flocculant, and a mixture obtained after the contact keeps stand and is settled and separated to obtain a first liquefied serum layer and a flocculation layer; and (5) the flocculation layer is filter-pressed to obtain a second liquefied serum layer and residues. The invention also provides application of the method in the fermentation preparation of citric acid. The processing method provided by the invention has the advantages of reducing the consumption of energy and equipment of liquefied serum, reducing the production cost and improving the production efficiency.

Description

technical field [0001] The invention relates to a processing method and application of starchy raw materials. Background technique [0002] Citric acid is an organic acid widely used in industries such as beverage, food and medicine. At present, citric acid is mainly prepared by fermentation. Generally, the starchy raw material is first pulverized, and the pulverized product is mixed with water to obtain a starch slurry, and the starch slurry is mixed with an enzyme for enzymolysis to obtain an enzymatic hydrolysis product (enzymolysis liquefaction solution) . A plate and frame filter press is used to filter the enzymolysis liquefaction liquid, and the evenly stirred liquefaction liquid is separated through the filter press to separate the liquefaction clear liquid and the filter residue, and the filter residue is removed to obtain a liquefaction clear liquid that is more conducive to subsequent fermentation. Aspergillus niger is inoculated into the fermentation broth cont...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C12P7/48C12R1/685
Inventor 熊结青卢宗梅陈程朱继成章辉平
Owner COFCO BIOTECHNOLOGY CO LTD
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