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A kind of alcohol production method based on comprehensive utilization of waste water

A production method and alcohol technology, applied in chemical instruments and methods, water/sewage treatment, water/sewage multi-stage treatment, etc., can solve the problem of high conductivity of mixing water, scaling of pipes and production equipment, and high osmotic pressure of alcohol. Yeast and other problems, to achieve the effect of eliminating bacterial pollution, environmental protection and economic benefits, and reducing the amount of addition

Active Publication Date: 2020-08-04
JIANGNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When calcium hydroxide and calcium oxide are added, the hardness of the mixing water is too high, resulting in serious scaling of pipelines and production equipment (especially heat exchangers). Circulation and accumulation, causing the mixing water to inhibit the fermentation of alcoholic yeast due to too high conductivity and too high osmotic pressure

Method used

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  • A kind of alcohol production method based on comprehensive utilization of waste water
  • A kind of alcohol production method based on comprehensive utilization of waste water
  • A kind of alcohol production method based on comprehensive utilization of waste water

Examples

Experimental program
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Effect test

Embodiment 1

[0039] Using cassava as raw material, 80% anaerobic clear liquid and 20% vinasse clear liquid are mixed as mixing water, the ratio of material to water is 1:3, the ammonia nitrogen concentration after mixing is 240mg / L, and the pH of the slurry after mixing is 5.6; Add 10U / g starch commercial liquefaction enzyme to the powder slurry, increase the heating temperature to 95℃ and maintain 100min; after liquefaction, cool down to 60℃, add 150U / g starch commercial saccharification enzyme, saccharify 15min, then cool to 30℃ ; 15% yeast seed liquid is added to the cooled saccharification liquid to start fermentation, and the fermentation time is 48 hours; after the fermentation is completed, the finished alcohol and distillation waste liquid are obtained through distillation; part of the distillation waste liquid is centrifuged to obtain the vinasse clear liquid And back to step (1), the vinasse discharged from the centrifuge is incorporated into the remaining distillation waste liquid...

Embodiment 2

[0046] Using corn as raw material, 60% anaerobic clear liquid and 40% vinasse clear liquid are mixed and used as mixing water. After mixing, the ammonia nitrogen concentration is 100mg / L, and the pH of the slurry after mixing is 5.0; adding 20U / to the slurry g starch liquefaction enzyme, heated to 105°C and liquefaction for 60min; after liquefaction, the temperature is reduced to 58°C, 200U / g starch commercial saccharification enzyme is added, and then the temperature is lowered to 28°C; the saccharification solution is inserted into the saccharification solution volume 8% yeast The seed liquor begins to ferment; after the fermentation, alcohol and distillation waste liquid are obtained through distillation; part of the distillation waste liquid is filtered through plate and frame to obtain vinasse clear liquid and return to step (1), the vinasse and remaining residues discharged from the plate and frame filter press Distillation waste liquid enters anaerobic digestion treatmen...

Embodiment 3

[0052] Using cassava and corn mixture as raw materials, 99% anaerobic clear liquid and 1% vinasse clear liquid are mixed as the mixing water, and the ammonia nitrogen concentration after mixing is 400mg / L; after mixing, a small amount of sulfuric acid is added to adjust the pH of the slurry to 6.0 , Then add 5U / g starch liquefaction enzyme and liquefy at 80°C for 120min; quickly cool the liquefied mash to 65°C, then add 80U / g starch saccharification enzyme, saccharify for 60 minutes, and cool to 32°C after saccharification; add 22% of the saccharification solution volume The yeast seed liquid starts fermentation. After fermentation, alcohol and distillation waste liquid are obtained through distillation; part of the distillation waste liquid is filtered through plate and frame to obtain vinasse clear liquid and returns to step (1). The remaining distillation waste liquid and the distiller’s dregs obtained by plate and frame pressure filter all enter the waste Oxygen digestion t...

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Abstract

The invention discloses an alcohol production method based on comprehensive utilization of waste water and belongs to the technical field of a waste water treatment and alcohol fermentation industry. The alcohol production method comprises carrying out one-step deamination treatment on an anaerobic digestion liquid, then carrying out solid-liquid separation to obtain an anaerobic clear liquid, and mixing the anaerobic clear liquid and a grain stillage clear liquid to obtain a liquid for material blending, wherein a ratio of the anaerobic clear liquid to the liquid for material blending is 60-99%. The one-step deamination treatment process comprises distilling an anaerobic digestion solution through water vapor in a distillation column with multiple layers of column plates or a filler, and removing a part of ammonia nitrogen and alkalinity of the anaerobic digestion solution through thermodynamic effects of water vapor. Through further deamination treatment on the anaerobic digestion solution, ammonia nitrogen accumulation in anaerobic digestion solution recycle is eliminated. The method has low energy consumption, less investment and simple operation, and is very suitable for industrial application.

Description

Technical field [0001] The invention relates to an alcohol production method based on comprehensive utilization of wastewater, and belongs to the technical field of wastewater treatment and alcohol fermentation industry. Background technique [0002] In the traditional process of producing alcohol by liquid fermentation, starch raw materials are crushed, mixed with water, liquefied and saccharified, and then inoculated with yeast for fermentation and distillation to obtain alcohol. At present, the production of alcohol mainly uses starchy crops such as cassava, corn, wheat, etc. as raw materials. The alcohol fermentation level is generally 10-20% (v / v). After the fermentation liquid is distilled, a large amount of distillation waste liquid will be produced. According to statistics, every ton of alcohol produced will produce 10-20 tons of distillation waste liquid, and its COD concentration is as high as 40,000-50000 mg / L. For example, the direct discharge of these waste water wi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C12P7/08C12P19/14C02F9/14
CPCC02F1/10C02F1/20C02F1/444C02F3/28C02F9/00C12P7/08C12P19/14
Inventor 张建华王柯张宏建陈旭升毛忠贵
Owner JIANGNAN UNIV
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