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Method for producing ethanol through fermentation of starch bearing material via composite fungistat raw material

A starchy raw material and raw meal fermentation technology, applied in fermentation, biofuels, etc., can solve the problem of large amount of penicillin, and achieve the effects of high ethanol concentration, reduced viscosity, and low temperature

Active Publication Date: 2014-10-15
COFCO NUTRITION & HEALTH RES INST +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, during the alcoholic fermentation process, it is necessary to frequently check the bacteria of the mash. If there are bacteria, it is necessary to add penicillin multiple times and in large quantities to fully inhibit the growth of miscellaneous bacteria. Therefore, the dosage of penicillin is relatively large

Method used

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  • Method for producing ethanol through fermentation of starch bearing material via composite fungistat raw material

Examples

Experimental program
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Effect test

Embodiment 1

[0045] Grind the corn raw material into powder, and the particle size of the crushed corn is 100% and pass through a 30-mesh sieve; it is mixed with water and clear liquid to make a powder slurry with a dry matter concentration of 30%; The weight ratio is 40%); then add penicillin (making the mass concentration in the system 1.2ppm) and monensin (making the mass concentration in the system 1.2ppm), acid protease 17U / g dry basis , amylase 34U / g dry basis, adjust the pH to 4.0, and stir at 63°C for 45min to make pretreated mash; then cool it down to 32.5°C, add magnesium sulfate (to make the mass concentration in the system 1-2ppm), zinc sulfate (making the mass concentration in the system 1-2ppm), urea (making the mass concentration in the system 240-260ppm), ammonium dihydrogen phosphate (making the mass concentration in the system The mass concentration is 10-14ppm), yeast (accounting for 0.2% by weight of the system), glucoamylase 450U / g dry basis, and fermentation for 80h. ...

Embodiment 2

[0047] The corn raw material is ground into powder, and the particle size of the ground corn is 100% and passed through a 35-mesh sieve; it is mixed with water and clear liquid to make a powder slurry with a dry matter concentration of 32%, and the clear liquid is returned to the mixing ratio (to make it in the system The weight ratio is 30%); then add penicillin (making the mass concentration in the system 0.8ppm), monensin (making the mass concentration in the system 1.6ppm), acid protease 15U / g dry basis , amylase 30U / g dry basis, adjust the pH to 4.3, and stir at 60°C for 30min to make pretreated mash; then cool it down to 30°C, add magnesium sulfate (to make the mass concentration in the system 2-3ppm), zinc sulfate (make the mass concentration in the system 2-3ppm), urea (make the mass concentration in the system 265-285ppm), ammonium dihydrogen phosphate (make it in the system The mass concentration is 14-18ppm), yeast (accounting for 0.4% by weight of the system), gluc...

Embodiment 3

[0049] The corn raw material is ground into powder, and the particle size of the ground corn is 100% and passed through a 40-mesh sieve; it is mixed with water and clear liquid to make a powder slurry with a dry matter concentration of 33%, and the clear liquid is returned to the mixing ratio (to make it in the system The weight ratio is 20%); then add penicillin (making the mass concentration in the system 0.6ppm), monensin (making the mass concentration in the system 1.8ppm), acid protease 20u / g dry basis , amylase 40u / g dry basis, adjust the pH to 4.5, and stir at 65°C for 60min to make pretreated mash; then cool it down to 35°C, add magnesium sulfate (to make the mass concentration in the system 2.5-3.5ppm), zinc sulfate (make the mass concentration in the system 2.5-3.5ppm), urea (make the mass concentration in the system 270-300ppm), ammonium dihydrogen phosphate (make it in the system The mass concentration in the mixture is 16-20ppm), yeast (accounting for 0.3% by weig...

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Abstract

The invention discloses a method for producing ethanol through fermentation of a starch bearing material via a composite fungistat raw material. The method comprises the following steps: crushing the starch bearing material into powder; preparing powder slurry with a dry matter mass concentration of 30 to 33% from the crushed starch bearing material, water and a clear liquid; pretreating the powder slurry by adding acidic protease, amylase and a composite fungistat into the powder slurry, adjusting a pH value to 4.0 to 4.5 and stirring the powder slurry so as to prepare a pretreated mash, wherein the composite fungistat contains penicillin and monensin; and adding glucoamylase, yeast and nutritive salt into the pretreated mash and carrying out fermentation. A mature fermented mash prepared by using the method has high alcohol concentration and high starch liquor yield; application of the composite fungistat enables the concentrations of lactic acid and acetic acid in raw material fermentation to be reduced, mixed fungus pollution to be reduced and the alcohol concentration and the starch liquor yield of the mature fermented mash to be further improved.

Description

technical field [0001] The invention relates to a method for producing ethanol by using a composite bacteriostatic agent to ferment starchy raw materials. Background technique [0002] In recent years, as the worldwide energy crisis has become increasingly serious, people are trying to find new energy sources to replace petroleum, and ethanol is one of the best choices. Ethanol is a renewable energy produced by fermentation of starch as raw material. It has already stood out in the field of energy and has increasingly shown broad and far-reaching development prospects. At the same time, with the contradiction between supply and demand in the ethanol market and the increasingly fierce market competition, people also realize that reducing the energy consumption and environmental pollution of ethanol industrial production is the key task for the survival and development of ethanol production enterprises. The energy consumption of the traditional ethanol production process is v...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C12P7/06
CPCY02E50/10
Inventor 刘文信刘劲松刘辉金明亮宫殿良郭福阳
Owner COFCO NUTRITION & HEALTH RES INST
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