Method for producing alcohol from straws and distilled grains abandoned during production of white spirit

A technology for straw and liquor, which is applied in the field of deep processing and fermentation of agricultural and sideline products to prepare alcohol, can solve the problems of low utilization rate, insufficient utilization of waste biomass resources of agricultural and sideline products, etc., and achieves high alcohol yield, high glucose utilization rate, and environmental The effect of pollution

Active Publication Date: 2011-11-23
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Song Andong et al. reported the experimental research on the production of fuel ethanol by fermenting distiller's grain biomass [Journal of Agricultural Engineering. 2003, 19(4): 278-281]. The research results show that the yields of starch and cellulose produced by direct fermentation of distiller's dregs to produce ethanol are 2% and 4%, respectively, and their utilization rates are relatively low.
Secondly, Liu Yuehong et al. studied the conditions of concentrated sulfuric acid to degrade liquor discarded grains [Study on the conditions of concentrated sulfuric acid to degrade liquor discarded grains to prepare degraded sugar solution. China Brewing. 2011, (01): 82-85.], but the literature only It involves the process from pretreatment to saccharification and degradation of liquor waste, does not involve the use of straw, nor does it involve the separation and recovery of degraded sugar and alcohol fermentation, and does not make full use of the waste biomass resources of agricultural and sideline products

Method used

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  • Method for producing alcohol from straws and distilled grains abandoned during production of white spirit
  • Method for producing alcohol from straws and distilled grains abandoned during production of white spirit
  • Method for producing alcohol from straws and distilled grains abandoned during production of white spirit

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] The distilled grains used in this example are the one-time distilled grains provided by Sichuan Shuijingfang Co., Ltd., and the straws are rice stalks collected in the suburbs of Chengdu.

[0029] (1) Straw crushing

[0030] Use a hammer mill to finely pulverize the straw, requiring more than 90% of it to pass through a 10-mesh sieve;

[0031] (2) Concentrated sulfuric acid saccharification and hydrolysis

[0032] Get the fresh distilled grains of liquor and mix with straw by 1: 0.6 mass ratio, mixture and concentration 80wt%H 2 SO 4 Stir and saccharify for 30 minutes according to the mass-to-volume ratio of 1:1, add water until the sulfuric acid concentration in the liquid is 20 wt%, and hydrolyze in a boiling water bath for 100 minutes;

[0033] (3) Neutralization of acid sugar solution

[0034] Filter the above saccharified hydrolyzate, rinse the acid residue twice with hot water at a temperature of 80°C, collect the washing liquid, and combine the washing liquid...

Embodiment 2

[0038] The distilled grains used in this example are the one-time distilled grains provided by Sichuan Shuijingfang Co., Ltd., and the straws are rice stalks collected in the suburbs of Chengdu.

[0039] (1) Straw crushing

[0040] Use a hammer mill to finely pulverize the straw, requiring more than 90% of it to pass through a 10-mesh sieve;

[0041] (2) Concentrated sulfuric acid saccharification and hydrolysis

[0042] Get the fresh distilled grains of liquor and mix with stalk by 1:1 mass ratio, mixture and concentration 80wt%H 2 SO 4 Stir and saccharify for 40 minutes according to the mass-to-volume ratio of 1:1.5, add water until the sulfuric acid concentration in the liquid is 25 wt%, and hydrolyze in a boiling water bath for 120 minutes;

[0043] (3) Neutralization of acid sugar solution

[0044] Filter the above saccharified hydrolyzate, rinse the acid residue twice with hot water at a temperature of 80°C, collect the washing liquid, and combine the washing liquid;...

Embodiment 3

[0048]The distilled grains used in this example are the one-time distilled grains provided by Sichuan Shuijingfang Co., Ltd., and the straws are rice stalks collected in the suburbs of Chengdu.

[0049] (1) Straw crushing

[0050] Use a hammer mill to finely pulverize the straw, requiring more than 90% of it to pass through a 10-mesh sieve;

[0051] (2) Concentrated sulfuric acid saccharification and hydrolysis

[0052] Get the fresh distilled grains of liquor and mix with stalk by 1: 0.8 mass ratio, mixture and concentration 80wt%H 2 SO 4 Stir and saccharify for 35 minutes according to the mass-to-volume ratio of 1:1.2, add water until the sulfuric acid concentration in the liquid is 22 wt%, and hydrolyze in a boiling water bath for 110 minutes;

[0053] (3) Neutralization of acid sugar solution

[0054] Filter the above saccharified hydrolyzate, rinse the acid residue twice with hot water at a temperature of 80°C, collect the washing liquid, and combine the washing liqui...

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Abstract

The invention discloses a method for producing alcohol from straws and distilled grains abandoned during the production of white spirit. The method is characterized by comprising the following steps of: mixing fresh distilled grains abandoned during the production of the white spirit and crushed straws at a ratio of 1 to (0.6-1); mixing the mixture with H2SO4 with the concentration of 80wt% at aweight-to-volume ratio of 1 to (1-1.5); mixing to saccharify the mixture for 30-40 minutes; adding water into the solution until the concentration of sulfuric acid is 20-25wt%; hydrolyzing the solution in boiling water for 100-120 minutes; and adding calcium carbonate into filtrate for neutralizing and collecting a sugar solution after filter-pressing the solution, wherein the sugar solution is used for alcoholic fermentation after decompressed and concentrated. The reducing sugar in acid hydrolysate obtained in the invention has the concentration of 3-5g/100ml and the degradation rate of 0.3-0.5g (glucose)/g (dry raw materials). The concentration of reducing sugar in the neutralized and concentrated sugar solution is 6-8g/100ml; and the final alcohol concentration can reach 9-11g/100ml after yeast and sugar are added for fermentation.

Description

technical field [0001] The invention relates to a method for producing alcohol by using distilled grains and straw, and belongs to the field of alcohol production by deep processing and fermentation of agricultural and sideline products. Background technique [0002] my country is a big wine production and consumption country, and a huge amount of fermentation waste and by-product straw of wine making raw materials are produced during the production of wine. Because distiller's grains contain a lot of organic matter, such as starch, cellulose, and organic acids, discarding distiller's grains as waste not only wastes resources, but also causes serious environmental pollution pressure. Straw also has similar problems. At present, the main utilization methods of domestic liquor discarded grains include: reproducing raw wine, producing glycerin, cultivating edible fungi, extracting and preparing active substances such as phytic acid, fermenting and recovering biogas, producing f...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C12P7/10C12R1/645
CPCY02E50/16Y02E50/10
Inventor 张文学吴正云谭力刘跃红李琪琦李琼
Owner SICHUAN UNIV
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