Process for recycling molasses alcohol wastewater evaporation and condensation liquid in alcohol fermentation

A technology of molasses alcohol wastewater, evaporation and condensation, applied in the field of alcohol fermentation, can solve the problems of affecting the economic profit of enterprises, high power consumption of aerobic digestion and treatment of evaporative condensate, and improve the utilization rate of raw materials, reduce the occupied area, and reduce the load Effect

Inactive Publication Date: 2018-03-30
JIANGNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The problem with this method is that the aerobic digestion of the evaporative condensate consumes a lot of electricity, and a large amount of excess sludge needs to be treated, which seriously affects the economic profit of the enterprise.

Method used

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  • Process for recycling molasses alcohol wastewater evaporation and condensation liquid in alcohol fermentation

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] A kind of technology that the molasses alcohol waste water evaporation condensate of the present invention is used for alcohol fermentation adopts the following process steps:

[0028] Dilute the sugarcane molasses to a concentration of 25% (w / v, sugar concentration) with the evaporation condensate of sugarcane molasses alcohol waste water, add sulfuric acid to adjust the pH to 4.0, add ammonium sulfate (0.1% of molasses, according to the undiluted molasses mass meter, The following relevant content is the same as this), disodium hydrogen phosphate (0.25% of molasses), magnesium sulfate (0.04% of molasses), and the temperature is raised to 85°C for 1h. Cool to 30°C, insert 15% (v / v) yeast seed liquid to start fermentation (after inoculation, the number of yeast in the fermentation liquid reaches 2×10 6 CFU / mL). After fermentation, alcohol and molasses alcohol waste water are obtained through a differential pressure distillation process. The average concentration of ac...

Embodiment 2

[0030] A kind of technology that the molasses alcohol waste water evaporation condensate of the present invention is used for alcohol fermentation adopts the following process steps:

[0031] Dilute beet molasses to a concentration of 25% with beet molasses alcohol wastewater evaporation condensate, add sulfuric acid to adjust pH to 4.0, calcium phosphate (1% of molasses, according to the undiluted molasses mass, the following relevant content is the same)), sulfuric acid Magnesium (0.04% of molasses), the temperature was raised to 85°C and maintained for 1h. Cool to 30°C, insert 15% (v / v) yeast seed solution to start fermentation. After fermentation, the process of atmospheric distillation obtains alcoholic and molasses alcoholic wastewater. The average concentration of acetic acid in this molasses alcohol wastewater is 374mg / L. The molasses alcohol wastewater is evaporated through multi-effect evaporation to obtain evaporation condensate, which is reused for the next batch...

Embodiment 3

[0033] A kind of technology that the molasses alcohol waste water evaporation condensate of the present invention is used for alcohol fermentation adopts the following process steps:

[0034] Mix beet molasses alcohol wastewater evaporation condensate with groundwater at a volume ratio of 1:1, dilute beet molasses to a concentration of 22% with mixed water, add sulfuric acid to adjust pH to 3.8, calcium phosphate (1% of molasses, according to the undiluted Molasses mass meter, the following relevant content is the same as this)), magnesium sulfate (0.04% of molasses). Insert 15% (v / v) yeast seed solution to start fermentation. After fermentation, alcohol and molasses alcohol waste water are obtained through a differential pressure distillation process. The average concentration of acetic acid in this molasses alcohol wastewater is 329mg / L. The molasses alcohol waste water is evaporated through multi-effect evaporation to obtain evaporation condensate, which is reused for the...

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Abstract

The invention discloses a process for recycling molasses alcohol wastewater evaporation and condensation liquid in alcohol fermentation, and belongs to the field of alcohol fermentation and alcohol industrial wastewater comprehensive utilization. By recycling the molasses alcohol wastewater evaporation and condensation liquid, the load capacity of the aerobic digestion section is reduced, the occupied area, that is, fixed investment and operating cost of the aerobic digestion section are reduced; the wastewater discharge amount is reduced, and meanwhile lots of water resources are saved.

Description

technical field [0001] The invention relates to a process for recycling the evaporated condensate of molasses alcohol wastewater to alcohol fermentation, and belongs to the field of comprehensive utilization of alcohol fermentation and alcohol industrial wastewater. Background technique [0002] Molasses is a by-product of sugarcane or sugar beet mills that contains a large amount of fermentable sugars and thus serves as a raw material for alcoholic fermentation. Molasses alcohol has obvious advantages compared with starchy raw materials in sugarcane (South China) or sugar beet production areas (North China) due to the simple source of raw materials, low cost of raw materials, low manufacturing technology requirements, low investment in production equipment, and high quality alcohol products. Advantage. However, the treatment of wastewater produced in the production process of molasses alcohol is relatively difficult, which has become a bottleneck problem restricting the de...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C12P7/08
CPCC12P7/08
Inventor 王柯张建华毛忠贵张宏建唐蕾陈旭升
Owner JIANGNAN UNIV
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