Circulation production process for alcohol with potatoes as main materials

A production process and raw material technology, which is applied in the circular production process field of potato raw material alcohol production, can solve the problems of difficult and thorough wastewater treatment, non-adoption of industrial production scale, limited cycle batches, etc., and achieve the reduction of investment in fixed assets and good economic efficiency. Benefits, the effect of reducing the floor space

Active Publication Date: 2007-05-23
JIANGNAN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The main problems of the method of producing biogas by anaerobic fermentation first and then aeration and aerobic treatment are that it occupies a large area and requires high investment. The third is that the treatment of wastewater is difficult to complete, and the discharged wastewater COD cr Still around 500mg/L
There is also a process of using distillation waste liquid circulation batching, but because the distillation waste mash after alcohol fermentation contains a large amount of o

Method used

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  • Circulation production process for alcohol with potatoes as main materials

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Take 260g of sweet potato powder, add 850ml of digestive solution of the previous batch and 150ml of tap water, add 0.13ml of high temperature resistant α-amylase with enzyme activity unit of 20000U / ml, stir evenly, heat, keep at 95℃ for 60 minutes and liquefy; then quickly cool to 62 ℃, add 0.26 ml of glucoamylase with enzyme activity unit of 100000U / ml, keep saccharification at 62°C for 1hr, after saccharification, cool to 30°C, insert 10% V / V expansion alcohol yeast (yeast inoculation amount), culture at constant temperature Fermentation is 64hr; the fermentation is over, the volume of mature fermentation broth is 1165ml, the alcohol concentration is 8.8% (v / v); 118ml of finished alcohol (95.2% v / v) is obtained by distillation, and the distillation waste liquid is 1050ml; the distillation waste liquid is cooled to 55℃ , Sent to the anaerobic fermentation tank, and then after two weeks of constant temperature anaerobic fermentation to produce biogas, COD in wastewater cr ...

Embodiment 2

[0021] 2100g of cassava flour, add 4500ml of the last batch of distillation waste liquid and 1000ml of tap water, add 1.4ml of high temperature resistant α-amylase with enzyme activity unit of 20000U / ml, stir well and heat, keep at 95°C for 50 minutes and liquefy; quickly cool down to 62°C , Add 2.6 ml of glucoamylase with an enzyme activity unit of 100000U / ml, keep the saccharification at 62°C for 1hr, cool to 30°C after the saccharification, connect to 8% V / V expansion alcohol yeast constant temperature culture fermentation, fermentation 68hr; fermentation end , The volume of mature fermentation broth is 6350ml, the alcohol concentration is 11.2%(v / v); the finished alcohol is 1030ml (95.3%v / v) and the distillation waste liquid is 5400ml, and the distillation waste liquid is cooled to 55℃ and sent to anaerobic fermentation. Anaerobic fermentation at a constant temperature in the tank for two weeks, the digestion solution is filtered to obtain 200g of activated sludge and 4500ml o...

Embodiment 3

[0023] 7800kg of cassava flour, add 29m of last batch of distillation waste liquid 3 And 5m 3 Tap water, add 5850 ml of high temperature resistant α-amylase with enzyme activity unit of 20000U / ml, stir well, heat, and liquefy at 95°C for 60 minutes; quickly cool to 62°C, add glucoamylase 11700 with enzyme activity unit of 100000U / ml Milliliters, saccharification at 62°C for 0.8hr. After saccharification, the temperature is reduced to 28°C, and 8% V / V expanded alcoholic yeast is connected for fermentation, and the fermentation is 66hr; after the fermentation, the volume of the mature fermentation broth is 35.5m 3 , The alcohol concentration is 10.3% (v / v); 3.1 tons of finished alcohol (95.2% v / v) are obtained through distillation, and the distillation waste liquid is 32.2m 3 After the sedimentation tank separates the mud and sand, it is sent to the anaerobic fermentation tank, the fermentation temperature is 55~60℃, and the biogas is collected and measured to get 1056m 3 (Pressure ...

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Abstract

The invention relates a annuliform production technique for producing alcohol with potato materials by utilizing anaerobic digesting solution as the technology ingredient water. The invention comprises the steps of: crushing potato starchiness materials, adding digesting solution, alpha- amylase, stirring uniformly, heating, incubating, liquefying, cooling, adding diastase, cooling after saccharification, inoculating yeast, culturing at constant temperature, distilling to obtain the product of alcohol, cooling the distilled waste mash, anaerobic-fermenting to obtain biogas, separating the broth to obtain digest and active sludge, and recycling the digest into the next fermentation to form a ring cycle. The distilled waste mash only needs anaerobic fermentation, which reduces the occupied ground area greatly and fixed asset investment. anaerobic fermentation is low cost, recycle of the digest can realize zero release of fermentation wastewater, completely eliminate the environmental pollution caused by the high concentration wastewater released by the present production of alcohol, and save large amount of water.

Description

Technical field [0001] The invention relates to a circular production process for the production of potato raw alcohol using anaerobic digestion liquid as process ingredient water, and belongs to the technical field of fermented alcohol industry. Background technique [0002] Fermentation of starchy raw materials to produce alcohol is one of the main methods of alcohol production. In the traditional fermentation process of starchy raw materials to produce alcohol, the starchy raw materials are crushed, slurried with water, cooked and liquefied, and lightly saccharified, and then inoculated with alcohol yeast fermentation (as introduced in the book "Alcohol Industry Handbook", edited by Zhang Kechang, etc., Light Industry Press). The traditional fermentation production process averages 12-15 tons of waste mash and COD per ton of alcohol. cr As much as 40,000 to 50,000 mg / L or more, it not only causes serious water pollution, but also causes a lot of waste of resources. [0003] Th...

Claims

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Application Information

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IPC IPC(8): C12P7/06C12R1/85
CPCY02E50/17Y02E50/10
Inventor 毛忠贵张建华段作营
Owner JIANGNAN UNIV
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