Method for producing alcohol by taking anaerobic effluent as ingredient water

An anaerobic effluent and alcohol technology, applied in chemical instruments and methods, water/sewage multi-stage treatment, water/sludge/sewage treatment, etc., can solve the problem that the process cannot run stably for a long time, is not conducive to the subsequent utilization of biogas, and increases alcohol Production cost and other issues, to achieve the effect of reducing nitrogen content, reducing hydrogen sulfide concentration, and eliminating inhibition

Active Publication Date: 2011-07-06
JIANGNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are two main problems when using anaerobic effluent for reuse: 1. The pH of anaerobic effluent is usually 7.0-8.2, and the pH of alcohol fermentation usually needs to be controlled at around 4.0, so sulfuric acid needs to be added to adjust
This increases the production cost of alcohol, and the sulfate radical will be reduced to hydrogen sulfide during the biogas fermentation process, which is not conducive to the subsequent utilization of biogas
In addition, sulfides can also be harmful to alcoholic fermentation
2. The ability of anaerobic system to remove nitrogen is poor. When anaerobic effluent is used for batching, with the increase of cycle batches, ammonia nitrogen in the system will accumulate
The accumulation of ammonia nitrogen will bring harm to biogas fermentation and alcohol fermentation, and then make the process unable to run stably for a long time

Method used

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  • Method for producing alcohol by taking anaerobic effluent as ingredient water
  • Method for producing alcohol by taking anaerobic effluent as ingredient water

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Example 1: A method for improving the stability of an alcohol production process using anaerobic effluent as the batching water adopts the following process steps:

[0036] 1. Take 100g of cassava flour and add 200g of the last batch of anaerobic effluent treated in step 8 for ingredients;

[0037] 2. Adjust the pH of the material liquid obtained in step 1 to 6.0 with 30% (w / w) sulfuric acid, add 800u high temperature resistant α-amylase, and cook at 100°C for 30 minutes to liquefy the starch;

[0038] 3. After the liquefaction is finished, cool the liquefied mash to 60°C, then adjust the pH of the material liquid to 4.0 with 30% (w / w) sulfuric acid, and then add 12000u saccharification enzyme for saccharification for 30 minutes;

[0039] 4. The material liquid obtained in step 3 is further cooled to 30°C, 15% of the volume of the material liquid is inserted into the cultured Saccharomyces cerevisiae seed liquid, and fermentation is carried out at a fermentation temperature of 3...

Embodiment 2

[0045] Example 2: A method for improving the stability of an alcohol production process using anaerobic effluent as the batching water, using the following process steps:

[0046] 1. Take 100g of cassava flour and add 300g of the last batch of anaerobic effluent treated in step 8 for ingredients;

[0047] 2. Adjust the pH of the material liquid obtained in step 1 with 30% (w / w) sulfuric acid to 6.0, add 1000u high temperature resistant α-amylase, and cook at 100°C for 30 minutes to liquefy the starch;

[0048] 3. After the liquefaction is completed, cool the liquefied mash to 60°C, then adjust the pH of the material liquid to 5.0 with 30% (w / w) sulfuric acid, and then add 13000u saccharification enzyme for saccharification for 15 minutes;

[0049] 4. The material liquid obtained in step 3 is further cooled to 30°C, and 8% of the volume of the material liquid is inserted into the cultured Saccharomyces cerevisiae seed liquid for fermentation, the fermentation temperature is 30°C, and th...

Embodiment 3

[0055] Example 3: A method for improving the stability of an alcohol production process using anaerobic effluent as the batching water, using the following process steps:

[0056] 1. Take 100g of cassava flour and add 250g of the last batch of anaerobic effluent treated in step 8 for ingredients;

[0057] 2. Adjust the pH of the material liquid obtained in step 1 to 6.0 with 30% (w / w) sulfuric acid, add 800u high temperature resistant α-amylase, and cook at 100°C for 30 minutes to liquefy the starch;

[0058] 3. After the liquefaction is over, cool the liquefied mash to 60°C, then adjust the pH of the material liquid to 5.0 with 30% (w / w) sulfuric acid, and then add 12000u glucoamylase for saccharification for 60 minutes;

[0059] 4. The material liquid obtained in step 3 is further cooled to 28°C, 0.2g of active dry yeast is added, and fermentation is carried out. The fermentation temperature is 28°C and the fermentation time is 60 hours;

[0060] 5. Distill the completely fermented fe...

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Abstract

The invention relates to a method of an alcohol production process in which anaerobic effluent is taken as ingredient water. The method comprises the following steps of: mixing raw materials with deaminized anaerobic effluent in a specified material to water ratio; adjusting pH value and adding liquefied enzyme, heating, digesting and liquefying; cooling, and adding saccharified enzyme for saccharifying; lowering the temperature, inoculating and fermenting; distilling; precipitating sulfate radicals before performing anaerobic treatment on the distilled effluent obtained by distilling; and performing anaerobic treatment on the distilled effluent, and performing deamination treatment to obtain ingredient water for fermenting a next batch of alcohol. By adopting method, the running stability of the process in which the anaerobic effluent is taken as the ingredient water is enhanced, the content of hydrogen sulfide in marsh gas obtained by fermenting anaerobic marsh gas is lowered, and subsequent use of the marsh gas is facilitated.

Description

Technical field [0001] The invention relates to an alcohol production method using anaerobic effluent as ingredient water, and specifically mainly refers to a method of calcium salt precipitation and removal of ammonia nitrogen to remove sulfate radicals and ammonia nitrogen that affect the stable operation of the process, belonging to fermentation Food industry technology field. Background technique [0002] In the traditional process of producing alcohol by liquid fermentation, starchy raw materials are crushed, added with water for slurry adjustment, cooking, liquefaction and saccharification, and then inoculated with yeast for fermentation. When using carbohydrate raw materials, only need to be diluted appropriately to inoculate yeast for fermentation. While producing 1 ton of alcohol, 12-15 tons of distillation waste liquid will be produced. Distillation waste liquid has the characteristics of high temperature (about 95°C), acidity (about pH 4) and high COD (COD 80000-1200...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C12P7/06C02F9/14
CPCY02E50/17Y02E50/10
Inventor 张建华张宏建张成明唐蕾毛忠贵
Owner JIANGNAN UNIV
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