Method for fermenting alcohol by reusing alcohol grain liquid and medium-temperature anaerobic effluent

A technology of anaerobic effluent and fermented alcohol, which is applied in the field of distiller's lees liquid water and medium-temperature anaerobic effluent to reuse fermented alcohol. It can solve the problems of low pH value of slurry, equipment corrosion, environmental climate impact, etc., and improve fermentation efficiency , Improve production efficiency and reduce processing costs

Inactive Publication Date: 2013-11-06
HENAN TIANGUAN GRP
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The invention patent with the application number 200410066017.3 published on August 31, 2005 in the Chinese patent discloses a closed-loop process for the production of high-concentration alcohol by clear liquid fermentation. The pH value of the slurry is low due to reuse, which needs to be adjusted by adding ammonia water, which greatly increases the production cost
The Chinese Patent Application No. 201010576401.3 published on July 13, 2011 discloses a method for the production of ethanol from medium-temperature anaerobic effluent water resources. The disadvantage of this technology is that it requires a large amount of oxidants such as oxygen or air. Oxidation treatment is time-consuming, labor-intensive and costly. At the same time, a large amount of CO will be produced through this technology. 2 , discharged into the air, aggravating the greenhouse effect and causing a great impact on the environment and climate
[0004] Chinese patent published on July 6, 2011 with the application number of 201010576411.7 disclosed in a patent for invention discloses a method for impro

Method used

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  • Method for fermenting alcohol by reusing alcohol grain liquid and medium-temperature anaerobic effluent

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Experimental program
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Effect test

Embodiment 1

[0023] The present invention adopts potato, wheat, corn, sorghum, cassava+wheat, potato+corn, sorghum+corn, cassava+sorghum to carry out small experiment respectively, utilizes the experimental means of control variable method, distiller's grain liquid water used in the experiment, and middle temperature exhaust Oxygen effluent comes from large-scale production residues; at the same time, each group of experiments carried out a comparison group test, and the comparison group used a single tap water for mixing, and the other steps remained the same. The experimental results are as follows:

[0024] potato wheat corn sorghum cassava + wheat potato + corn sorghum + corn cassava + sorghum Alcohol degree of mature mash in experimental group 15.27% 14.92% 14.74% 13.85% 15.33% 14.68% 14.20% 14.90% Total sugar in experimental group 2.71% 2.90% 2.14% 2.33% 2.99% 2.73% 2.25% 2.50% Mature alcohol content of the comparison ...

Embodiment 2

[0027] A method for co-reusing fermented alcohol with distiller's grain liquid water and medium-temperature anaerobic effluent, comprising the following process steps:

[0028] (1) Take 500kg of cassava flour, add 560kg of distiller's grain liquid water, add 350kg of medium-temperature anaerobic effluent, and add 45kg of tap water to obtain a slurry pH of 5.0;

[0029] (2) Add 14u / g 干料 60g of high-temperature amylase, stir evenly, heat, and heat at 90°C for 120 minutes to liquefy;

[0030] (3) Rapidly cool down to 34°C, then add 180 u / g干料 Add 500g of glucoamylase, add 1kg of active dry yeast, culture and ferment at 33°C for 60 hours, and the fermentation is over. The volume of the mature fermentation liquid is 809L, the alcohol concentration is 15.15% (v / v), and the finished alcohol is 107kg (95.7% v / v) after distillation. / v);

[0031] (4) Distiller's grains are filtered to obtain 560kg of distiller's residue and distiller's liquid water, of which 270 kg is used for the nex...

example 3

[0036] A method for co-reusing fermented alcohol with distiller's grain liquid water and medium-temperature anaerobic effluent, comprising the following process steps:

[0037] (1) Take 480kg of cassava and corn mixed powder at a ratio of 3:1, add 480kg of distiller's grain liquid water, add 420kg of medium-temperature anaerobic effluent, add 75kg of tap water and 12.5kg of distilled raffinate water, and obtain a slurry pH value of 5.8;

[0038] (2) Add 15u / g 干料 50g of high-temperature amylase, stir evenly, heat, and heat at 95°C for 100 minutes to liquefy;

[0039] (3) Rapidly cool down to 36°C, then add 200 u / g 干料 500g of glucoamylase, after mixing, continue to lower the temperature to 35°C, insert 1kg of active dry yeast, and culture and ferment at a constant temperature of 34°C for 65 hours. The fermentation is completed. The volume of the mature fermentation liquid is 957 kg, and the alcohol concentration is 15.22% (v / v). After distillation and rectification, 109kg (95....

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Abstract

The invention discloses a method for fermenting alcohol by reusing alcohol grain liquid and medium-temperature anaerobic effluent. According to the process method, burdening liquid is added according to the feed liquid weight ratio of 1:1.5-2.4, the burdening liquid is composed of the alcohol grain liquid, the medium-temperature anaerobic effluent and supplemented clean water, the effluent is reused, and ammonium hydroxide or sulfuric acid are not required, so that the effluent treatment cost can be reduced. By controlling the feed water ratio and adjusting the proportion of alcohol grain liquid and the medium-temperature anaerobic effluent to control the pH value, the complex cost-increasing procedures of conducting acid radical removing, ammonia nitrogen removing and additionally adding of acid or alkali to adjust the pH value and the like on the medium-temperature anaerobic effluent in the traditional process are avoided, the production efficiency is greatly improved, the production cost is reduced, sewage discharge in alcohol production is greatly reduced, feed mixing water use cost and sewage treatment cost are saved, more additional products are produced, and considerable market economical benefit is brought.

Description

technical field [0001] The invention relates to the technical field of reuse of distiller's grain liquid water and medium-temperature anaerobic effluent in the field of bioengineering, in particular to a method for co-reusing fermented alcohol with distiller's grain liquid water and medium-temperature anaerobic effluent. Background technique [0002] Alcohol, as a renewable strategic resource, has entered the national key industrial products, but the alcohol fermentation industry is currently an industry that pollutes the environment. Most of the wastewater produced by traditional fermentation methods is treated and discharged into natural water bodies. Although many indicators such as COD in the treated discharged water have reached the standard, there is still a large gap compared with natural water. The alcohol fermentation industry is a bulk product production industry, and the discharge water measurement unit is usually 10,000 tons, which still has a large pollution to ...

Claims

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Application Information

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IPC IPC(8): C12P7/06
CPCY02E50/17Y02E50/343Y02E50/10Y02E50/30
Inventor 张锋杜风光孙沛勇曲爱民周鹏李勇王秋峰
Owner HENAN TIANGUAN GRP
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