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Method for Improving Ethanol Yield Produced by Discarding Distilled Grains of Liquor

A liquor and ethanol technology, applied in microorganism-based methods, biochemical equipment and methods, microorganisms, etc., can solve the problems of not fully utilizing the waste biomass resources of agricultural and sideline products, not involving control and removal processes, etc. Production of fermentation inhibitors such as furfural, improvement of ethanol fermentation rate and yield, and effects of high-efficiency utilization methods

Active Publication Date: 2022-03-15
LUZHOU LAOJIAO CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, the above-mentioned literature only involves the process from pretreatment to saccharification degradation and ethanol fermentation of liquor discarded grains, and does not involve the production control and removal process of fermentation inhibitors such as furfural and oxalic acid in the degraded sugar solution, thereby improving ethanol fermentation Yield, the waste biomass resources of agricultural by-products are not fully utilized

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] The distilled grains of liquor used in this embodiment are the distilled grains after the solid-state fermentation of Luzhou-flavor liquor, and the process includes the following steps:

[0048] A, dregs soaking: collect liquor dregs, adjust its humidity to a water content of 55%;

[0049] B. Gentle degradation and saccharification of dilute sulfuric acid: take the distilled grains and H + The dilute acid solution with a concentration of 0.2mol / L is fully mixed according to the mass ratio of 1:4, and hydrolyzed and saccharified for 20 minutes in a reaction kettle at a temperature of 120°C; Separation to obtain acidic dilute sugar solution;

[0050] C. Concentration of dilute sugar solution: at a temperature of 50-55°C, evaporate the acidic dilute sugar solution under reduced pressure until the concentration of reducing sugar is 60g / L to obtain a concentrated sugar solution;

[0051] D. Neutralization of sugar concentrate: use CaO or CaOH 2 Adjust the pH of the hydrol...

Embodiment 2

[0057] The distilled grains of liquor used in this embodiment are the distilled grains after the solid-state fermentation of Luzhou-flavor liquor, and the process includes the following steps:

[0058] A, dregs soaking: collect liquor dregs, adjust its humidity to a water content of 60%;

[0059] B. Gentle degradation and saccharification of dilute sulfuric acid: take the distilled grains and H + The dilute acid solution with a concentration of 0.5mol / L is fully mixed according to the mass ratio of 1:5, and hydrolyzed and saccharified for 30 minutes in a reaction kettle at a temperature of 125°C; Separation to obtain acidic dilute sugar solution;

[0060] C. Concentration of dilute sugar solution: at a temperature of 50-55°C, evaporate the acidic dilute sugar solution under reduced pressure until the concentration of reducing sugar is 65g / L to obtain a concentrated sugar solution;

[0061] D. Neutralization of sugar concentrate: use CaO or CaOH 2 Adjust the pH of the hydrol...

Embodiment 3

[0067] The distilled grains of liquor used in this embodiment are the distilled grains after the solid-state fermentation of Luzhou-flavor liquor, and the process includes the following steps:

[0068] A, dregs soaking: collect liquor dregs, adjust its humidity to a water content of 60%;

[0069] B. Gentle degradation and saccharification of dilute sulfuric acid: take the distilled grains and H + The dilute acid solution with a concentration of 0.5mol / L is fully mixed according to the mass ratio of 1:5, and hydrolyzed and saccharified for 20 minutes in a reaction kettle at a temperature of 125°C; Separation to obtain acidic dilute sugar solution;

[0070] C. Concentration of dilute sugar solution: at a temperature of 50-55°C, evaporate the acidic dilute sugar solution under reduced pressure until the concentration of reducing sugar is 60g / L to obtain a concentrated sugar solution;

[0071] D. Neutralization of sugar concentrate: use CaO or CaOH 2 Adjust the pH of the hydrol...

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Abstract

The invention discloses a method for improving the yield of ethanol prepared from distilled grains, and belongs to the field of agricultural and sideline product reuse. In order to improve the utilization rate of liquor discarded grains and increase the yield of ethanol fermentation, the present invention provides a method for increasing the yield of liquor discarded grains to prepare ethanol. In the method, the humidity of liquor discarded grains is adjusted first, and then mild acid hydrolysis is used , to ensure a higher yield of reducing sugar, and reduce the formation of fermentation inhibitors; then evaporate under reduced pressure and neutralize with alkali to effectively remove low-boiling point organic acids and ester fermentation inhibitors in the sugar liquid; then use activated carbon and hydrogen peroxide The joint treatment can effectively remove the fermentation inhibitor furfural under the condition of extremely low sugar loss, the sugar loss in the sugar concentrate is less than 1g / L, and the removal of furfural reaches 85%-95%, which significantly improves the ethanol fermentation rate and The yield provides a more efficient utilization method for the waste of liquor.

Description

technical field [0001] The invention belongs to the technical field of agricultural and sideline product reuse, and in particular relates to a method for improving the yield of ethanol prepared from distilled grains. Background technique [0002] my country's winemaking waste is the main by-product of solid-state liquor brewing. According to the calculation of the solid-state liquor production process, about 3 tons of waste will be produced for every ton of liquor produced. According to statistics, from 2015 to 2019, the national average annual output of liquor is 9.716 million kiloliters, which will produce about 30 million tons of wine waste. With the gradual recovery of liquor industry policies and the upgrading and transformation of major liquor companies, The output of distiller's waste will increase year by year. If such a huge amount of distillery waste is directly discharged into the environment without reasonable treatment, it will not only cause environmental poll...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C12P7/08C12R1/865
CPCC12P7/08
Inventor 雷翔云熊燕飞邓波敖灵李勇李嘉俞佳刘颖捷曾珊
Owner LUZHOU LAOJIAO CO LTD