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Method for fermenting and producing ethyl alcohol through corn starch

A technology of corn starch and alcohol, applied in fermentation, biofuel, etc., can solve the problems that pure corn starch lacks yeast nutrients and cannot be produced and fermented normally, and solves the problem of pipeline material transportation, solves the difficulty of material transportation, and reduces viscosity. Effect

Inactive Publication Date: 2017-08-18
GUANGXI COFCO BIO ENERGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, since pure cornstarch lacks the nutrients needed for yeast growth, it cannot be produced and fermented by directly adding water and mixing materials. It is necessary to develop an effective and feasible cornstarch alcoholic fermentation process.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] A method for producing ethanol by fermenting cornstarch, which uses cornstarch and sugarcane molasses as main raw materials for mixed fermentation to generate ethanol, and the specific operation steps are as follows:

[0020] 1. Dilute the sugar cane molasses with a sugar Brix of 80-85°Bx to 45°Bx with distilled water, adjust the pH value to 3.60 with mass concentration 65% sulfuric acid, and acidify for 30 minutes.

[0021] 2. Add 1% sugarcane molasses, 20u / g cornstarch amylase and water to cornstarch with a starch content of 99.0% for mixing and mixing to obtain a slurry with a solid content of 22% and a pH of 5.40.

[0022] 3. The slurry in the previous step is liquefied by steam injection at a temperature of 105°C to 115°C, and then enters the liquefaction tank for 1.5 hours of heat preservation and liquefaction at a temperature of 85°C to 87°C. After the liquefaction is completed, the liquefied mash is cooled to 55°C by flash evaporation. ℃~65℃, then use cooling wa...

Embodiment 2

[0026] A method for producing ethanol by fermenting cornstarch, which uses cornstarch and sugarcane molasses as main raw materials for mixed fermentation to generate ethanol, and the specific operation steps are as follows:

[0027] 1. Dilute the sugar cane molasses with a sugar Brix of 80-85°Bx to 45°Bx with distilled water, adjust the pH value to 3.60 with mass concentration 65% sulfuric acid, and acidify for 30 minutes.

[0028] 2. Add 5% sugarcane molasses, 25u / g cornstarch amylase and water to the cornstarch with a starch content of 99.0% for mixing and mixing to obtain a slurry with a solid content of 20% and a pH of 5.60.

[0029] 3. The slurry in the above step is liquefied by steam injection at a temperature of 105°C to 115°C, and then enters a liquefaction tank for 1.0 hours of heat preservation and liquefaction at a temperature of 85°C to 87°C. After the liquefaction is completed, the liquefied mash is cooled to 55°C by flash evaporation. °C to 65 °C, then cool down...

Embodiment 3

[0033] A method for producing ethanol by fermenting cornstarch, which uses cornstarch and sugarcane molasses as main raw materials for mixed fermentation to generate ethanol, and the specific operation steps are as follows:

[0034] 1. Dilute the sugar cane molasses with a sugar Brix of 80-85°Bx to 45°Bx with distilled water, adjust the pH value to 3.60 with mass concentration 65% sulfuric acid, and acidify for 30 minutes.

[0035] 2. Add 10% sugarcane molasses, 30u / g cornstarch amylase and water to cornstarch with a starch content of 99.0% for mixing and mixing to obtain a slurry with a solid content of 18% and a pH of 5.50.

[0036] 3. The slurry in the above step is liquefied by steam injection at a temperature of 105°C-115°C, and then enters a liquefaction tank for 2.0 hours of heat preservation and liquefaction at a temperature of 85°C-87°C. After liquefaction, the liquefied mash is cooled down to 55°C by flash evaporation. ℃~65℃, then use cooling water to lower the tempe...

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PUM

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Abstract

The invention discloses a method for fermenting and producing ethyl alcohol through corn starch. The method comprises the steps that 1, the brix of molasses is adjusted to 45 Bx and a pH value is regulated to 3.60 to perform acidification; 2, the molasses obtained after acidification and corn starch are prepared into powder syrup; 3, amylase is added to liquify the powder syrup into liquified mash; 4, saccharifying enzyme, Anjuntai and yeast mash are added to the liquified mash, anaerobic fermentation is performed to obtain mature fermented mash; 5, the mature mash liquid is rectified, and then the ethyl alcohol with the content of 99.5% or above is obtained. The method has the advantages that corn starch fermentation is performed by applying the method, the nutrient substances and conditions required by normal ethyl alcohol fermentation of yeast are met, and the problem that corn starch cannot be normally fermented to produce the ethyl alcohol is solved; the method performs ethyl alcohol fermentation by utilizing the corn starch, the viscosity is greatly reduced, the problem of difficult material conveying due to too high mash liquid viscosity in production is effectively solved, and meanwhile the energy consumption is reduced.

Description

technical field [0001] The invention belongs to the technical field of ethanol preparation, in particular to a method for producing ethanol by fermenting cornstarch. Background technique [0002] In my country, the traditional raw materials for alcohol production are corn, cassava, rice and other crops. However, with the rapid development of China's economy and the development of technology in the alcohol industry, the shortage of raw materials has become increasingly prominent, and the diversification of raw materials is imperative. Corn starch is a deep-processing product of corn. Due to years of government purchase and storage, the corn inventory is unprecedented, and the production capacity of my country's starch processing industry is very large. The use of corn starch for alcohol fermentation can solve the problem of starch sales on the one hand, and on the other hand, it can be increasingly Reduced alcohol raw material problems. [0003] However, since pure cornstarch...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C12P7/06C12P19/14
CPCC12P7/06C12P19/14Y02E50/10
Inventor 梁坤国李永恒许旺发李志鹏
Owner GUANGXI COFCO BIO ENERGY
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