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Method for preparing special corn flour for fermentation

A technology of corn flour and corn granules, applied in fermentation and other directions, can solve problems such as glucose repression, and achieve the effects of low manufacturing cost, convenient operation, and reduced production cost

Active Publication Date: 2015-05-13
HENAN ZHENXIN BIOTECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The invention not only solves the problem of the cost of the carbon source fermentation medium in industrial fermentation, improves the utilization efficiency of the medium by microorganisms, but also provides the necessary technical basis and theoretical basis for solving the problem of glucose repression in the industrial fermentation process

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] 1) Take mold-free and non-genetically modified corn pellets with a protein content greater than 8% and starch content greater than 70%, crush them through a 40-mesh sieve, and take the sieve to obtain corn flour;

[0026] 2) Mix the corn flour obtained in 1) with an industrial enzyme preparation, the industrial enzyme preparation is alpha-amylase and glucoamylase, add 10u of alpha-amylase per gram of corn flour, and add 150u of glucoamylase per gram of corn flour , After being mixed evenly, it is sent to a twin-screw extruder for extrusion, the temperature of the extrusion is 80°C, and the pressure is 0.8MPa;

[0027] 3) Adopt airflow drying technology to dry step 2) Extrude the puffed raw material, use dry air at 60°C to take away the moisture in the raw material, so that the moisture content of the raw material is less than 8%;

[0028] 4) Use a micronizer to pulverize 3) The dried raw materials are pulverized to a particle size of corn flour of 3 μm, and the pulverizing pro...

Embodiment 2

[0031] 1) Take mold-free and non-genetically modified corn pellets with a protein content greater than 8% and starch content greater than 70%, crush them through a 40-mesh sieve, and take the sieve to obtain corn flour;

[0032] 2) Mix the corn flour obtained in 1) with an industrial enzyme preparation, the industrial enzyme preparation is alpha-amylase and glucoamylase, add 12u of alpha-amylase per gram of corn flour, and add 180u of glucoamylase per gram of corn flour , After being evenly mixed, it is sent to a twin-screw extruder for extrusion, the temperature of the extrusion is 120°C, and the pressure is 1MPa;

[0033] 3) Adopt airflow drying technology to dry step 2) Extrude the puffed raw material, use the dry air at 70°C to take away the moisture in the raw material, so that the moisture content of the raw material is less than 10%;

[0034] 4) Use a micronizer to pulverize 3) The dried raw materials are pulverized to a particle size of corn flour of 4 μm, and the temperature...

Embodiment 3

[0037] 1) Take mold-free and non-genetically modified corn pellets with a protein content greater than 8% and starch content greater than 70%, crush them through a 40-mesh sieve, and take the sieve to obtain corn flour;

[0038] 2) Mix the corn flour obtained in 1) with an industrial enzyme preparation, the industrial enzyme preparation is alpha-amylase and glucoamylase, add 15u of alpha-amylase per gram of corn flour, and add 200u of glucoamylase per gram of corn flour , After being evenly mixed, it is sent to a twin-screw extruder for extrusion, the temperature of the extrusion is 150°C, and the pressure is 1.5MPa;

[0039] 3) Adopt airflow drying technology to dry step 2) Extrude the puffed raw material, use 80°C dry air to take away the moisture in the raw material, so that the moisture content of the raw material is less than 12%;

[0040] 4) Use a micronizer to pulverize 3) The dried raw material is pulverized to a particle size of corn flour of 5 μm, and the temperature of the...

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Abstract

The invention relates to a method for preparing special corn flour for fermentation. The method comprises the steps: crushing no-mildew corn grains, screening with a screen with the mesh size of 40 meshes, and fetching screen underflow, so as to obtain corn flour; mixing the corn flour and an industrial enzyme preparation, mixing uniformly, and then, feeding the mixture into a twin-screw extrusion and bulking machine for extruding and bulking; drying extruded and bulked raw materials so as to enable the moisture content of the raw materials to be lower than 8-12%; crushing the dried raw materials by using a pulverizer, and controlling the temperature to be below 80 DEG C during crushing, thereby obtaining the special corn flour for fermentation. The method disclosed by the invention is simple in process, convenient in operation, easy in automation and low in preparation cost; the special corn flour for fermentation, prepared by the method, has the advantages that a pretreating step for industrial fermentation enterprises during use is avoided, the corn flour utilization efficiency of microorganisms is increased, and the comprehensive economic benefits of the industrial fermentation enterprises are increased.

Description

Technical field [0001] The invention relates to a method for preparing corn flour special for fermentation, and belongs to the field of production and preparation methods of a carbon source culture medium for industrial fermentation. Background technique [0002] At present, industrial fermentation, especially antibiotic fermentation, such as penicillin, streptomycin, lincomycin, erythromycin, etc., mainly use corn starch and glucose as the main carbon source of the culture medium, and even some antibiotic fermentation, such as meleumycin, etc. Only glucose can be used as a carbon source. The cost of a carbon source culture medium accounts for 45-60% of the production cost of antibiotics, of which glucose accounts for about 70% of the entire culture medium cost. Because glucose is obtained from corn starch through separation of germ, fiber and protein, and then hydrolyzed and refined. There are two fundamental ways to reduce the production cost of antibiotics: one is to breed hi...

Claims

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Application Information

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IPC IPC(8): C12P19/20C12P19/14C12P19/02
Inventor 岳新建
Owner HENAN ZHENXIN BIOTECH CO LTD
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