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Method for producing alcohol through liquor fermentation

A clear liquid and alcohol technology, applied in fermentation, biofuel and other directions, can solve the problems of increased content of fermentation by-products, contamination of bacteria, and reduced starch utilization rate, and achieves the goal of reducing the production of fermentation by-products, exuberant metabolism, and reducing losses. Effect

Inactive Publication Date: 2013-11-06
HENAN TIANGUAN GRP
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  • Summary
  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

[0004] In the existing technology of clear liquid fermentation to produce alcohol, as the patent No. ZL03126892 "Method for producing alcohol by clear liquid fermentation" and the patent No. ZL200410066017 "A closed cycle process for producing high-concentration alcohol by clear liquid fermentation", often Solid-liquid separation begins after liquefaction and saccharification, and clear liquid fermentation and distillation produce alcohol; these existing clear liquid fermentation technologies use deep saccharification or full saccharification processes, which are prone to bacterial contamination during the production process, and high concentrations of sugar The liquid will inhibit Saccharomyces cerevisiae, resulting in an increase in the content of fermentation by-products, resulting in a decrease in starch utilization

Method used

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  • Method for producing alcohol through liquor fermentation

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Effect test

Embodiment 1

[0017] This embodiment is the experimental data of a small test, adopts cassava, sorghum, wheat mixed raw material, carries out batching with tap water, and its process step comprises:

[0018] a. Take 50g of cassava flour, 50g of sorghum flour, 50g of wheat flour, crushed to 50 mesh, put them into a 1000ml Erlenmeyer flask, add 225mL of tap water, stir evenly with a glass rod, adjust the pH value of the slurry to 5.5 with NaOH, and add 11u of amylase / g dry material, stir evenly, put it into a constant temperature water bath, heat it, and keep it at 86°C for 3 hours to liquefy. Repeat for three parallel samples;

[0019] b. Filter with a 90-mesh filter cloth and press manually, cool the clear liquid to 28°C, add 120 u / g dry material of glucoamylase, inoculate 0.2g of dry yeast, and culture and ferment at a constant temperature of 28°C for 50 hours to complete the fermentation, and the mature mash after fermentation Carry out distillation to produce alcohol, and test fermenta...

Embodiment 2

[0023] This embodiment is the experimental data of a small test, adopts cassava, corn, wheat mixed raw material, carries out batching with tap water, and its process step comprises:

[0024] a. Take 50g of cassava flour, 50g of corn flour, 50g of wheat flour, crushed to a size of 50 mesh, put them into a 1000ml Erlenmeyer flask, add 380mL of tap water, stir well with a glass rod, adjust the pH of the slurry to 6.0 with NaOH, and add 13u of amylase / g dry material, stir evenly, put it into a constant temperature water bath, heat it, and keep it at 93°C for 2.6h to liquefy. Repeat for three parallel samples;

[0025] b. Filter with a 90-mesh filter cloth and press manually, cool the clear liquid to 33°C, add glucoamylase 190 u / g dry material, inoculate 0.3g of dry yeast, culture and ferment at a constant temperature of 33°C for 40 hours, and the fermentation is completed. The mature mash after fermentation Carry out distillation to produce alcohol, and test fermentation indicat...

Embodiment 3

[0029] This embodiment is the experimental data of a small test, adopts potato, sorghum mixed raw material, carries out batching with tap water, and its process step comprises:

[0030] a. Take 75g of potato flour and 75g of sorghum flour, crushed to a particle size of 50 mesh, put them into a 1000ml conical flask, add 525mL of tap water, stir evenly with a glass rod, adjust the pH value of the slurry to 6.5 with NaOH, add 17u / g of amylase to dry Stir the material evenly, put it into a constant temperature water bath, heat it, and heat it at 100°C for 2 hours to liquefy. Repeat for three parallel samples;

[0031] b. Filter with a 90-mesh filter cloth and press manually, cool the clear liquid to 36°C, add 250u / g dry material of glucoamylase, inoculate 0.5g of dry yeast, culture and ferment at a constant temperature of 36°C for 30 hours, and ferment the mature mash after fermentation. Alcohol is produced by distillation, and fermentation indicators such as alcohol content and r...

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Abstract

The invention discloses a method for producing alcohol through liquor fermentation. The method comprises the steps of performing solid-liquid separation on liquefied starchy raw materials to obtain liquor and solid residues, and adding glucoamylase and yeast to the liquor for alcohol fermentation; adding water to the solid residues for saccharification processing, performing solid-liquid separation again to obtain sugary washing water and waste residues, wherein the sugary washing water can be used for preparation or cultivation and fermentation of the yeast, and the waste residues can be produced into fertilizers and feeds or used for biogas fermentation. According to the method, the alcohol content of prepared fermented mature mash exceeds 15.2% (v / v), the residual total sugar can be lower than 1.03%, the content of residues and starch is lower than 2.91%, and the utilization rate of starch can reach above 96.5%; the liquor obtained through mash liquidation is not easy to contaminate and does not produce high glucose suppression in a fermentation process, fermentation by-products are reduced, equipment wear can be reduced obviously, and the utilization rate and the distillation efficiency of fermentation equipment can be improved.

Description

technical field [0001] The invention relates to the technical field of alcohol production, in particular to a method for producing alcohol by clear liquid fermentation. Background technique [0002] Alcohol is widely used in food, chemical medicine, dyestuff, national defense and other industries. Alcohol can be used not only as a fuel, but also as a strategic material. 2 / 3 of the alcohol in the world is used as fuel. The development of alcohol can not only promote the sustainable development of agriculture, but also can be used as clean energy to replace gasoline or gasoline additives, reduce industrial air pollution, protect the environment, and relieve the pressure of crude oil imports. my country's alcohol fermentation industry has a history of about 100 years. The ancient alcohol industry has been favored in recent years because of its laurels of green energy. Alcohol, as a renewable strategic resource, has become a key industrial product developed by the country. Alc...

Claims

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Application Information

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IPC IPC(8): C12P7/06
CPCY02E50/17Y02E50/10
Inventor 张建博杜风光孙沛勇周鹏黄玉涛
Owner HENAN TIANGUAN GRP
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