Alcohol double-ring production method using cassava as main raw material

A production method and double-ring technology, which can be used in biofuels, fermentation and other directions, can solve the problems of difficult material and liquid transportation, increased power consumption, inhibiting yeast growth, etc. and power consumption, eliminating the effect of competitive inhibition

Inactive Publication Date: 2019-01-11
JIANGNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] (1) The concentration of the feed solution in the liquefaction section is high, resulting in an increase in the amount of liquefaction enzyme added, difficulty in feeding the feed solution, and increased power consumption;
[0006] (2) Distiller's grains are used as acid-adjusting water in the saccharification process, and some of the remaining microorganisms will multiply in large numbers during the saccharification process, which not only causes the reduction of fermentable sugar in alcohol fermentation, but also inhibits the growth of yeast, making the fermentation acidity serious, and the alcohol yield decline

Method used

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  • Alcohol double-ring production method using cassava as main raw material

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Take 4000g of cassava flour, add recycled water and add tap water to 12L, add 560μL of high-temperature-resistant α-amylase, stir evenly, heat to 95°C and maintain for 120min; cool down to 60°C, add 6mL of glucoamylase, stir well and keep warm Saccharification for 20min. After the saccharification is completed, the temperature is lowered to 30° C., and 10% (v / v) yeast seed liquid is inserted to start fermentation. After fermentation, alcohol, distiller's grains and fine tower residue are obtained through distillation, rectification and other processes. The distiller's grains are centrifuged to obtain the distiller's grains clear liquid, and 90% of the distiller's grains clear liquid enters the anaerobic digestion reactor for treatment, and biogas is collected during the treatment process. Anaerobic digestion effluent is passed through ultrafiltration membrane to obtain membrane filtrate (ultrafiltration membrane molecular weight cut-off 200kDA, membrane surface flow ve...

Embodiment 2

[0036] Take 100g of cassava flour, add recycled water and tap water to 220mL, add 21μL of high-temperature-resistant α-amylase, stir well, heat to 95°C and maintain for 120min; cool down to 60°C, add 180μL of glucoamylase, stir well, and keep warm for saccharification 20min. After the saccharification is completed, the temperature is lowered to 30° C., and 10% (v / v) yeast seed liquid is inserted to start fermentation. After the fermentation is over, alcohol, distiller's grains and fine tower residue are obtained through processes such as distillation and rectification. The distiller's grains are centrifuged to obtain the distiller's grains clear liquid, and 80% of the distiller's grains clear liquid enters the anaerobic digestion reactor for treatment, and biogas is collected during the treatment process. The anaerobic digestion effluent is passed through a microfiltration membrane to obtain a membrane filtrate (the molecular weight cut-off of the microfiltration membrane is ...

Embodiment 3

[0038]Take 300kg of cassava flour, add recycled water and tap water to 900L, add 42mL of high-temperature-resistant α-amylase, stir well, heat to 95°C and maintain for 120min; cool down to 58°C, add 450mL of glucoamylase, stir well, and keep warm for saccharification 20min. After the saccharification is completed, the temperature is lowered to 30° C., and 10% (v / v) yeast seed liquid is inserted to start fermentation. After the fermentation is over, alcohol, distiller's grains and fine tower residue are obtained through processes such as distillation and rectification. The distiller's grains are centrifuged to obtain distiller's grains, and 70% of the distiller's grains are processed in an anaerobic digestion reactor, and biogas is collected during the treatment process. The anaerobic digestion effluent is passed through the ultrafiltration membrane to obtain the membrane filtrate (the ultrafiltration membrane molecular weight cut-off is 300kDA, the membrane surface flow veloc...

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Abstract

The invention discloses an alcohol double-ring production method using cassava as main raw material, belonging to the technical field of wastewater treatment and alcohol fermentation industry. The solid-liquid separation of 5-40% of the distiller grains liquor and the rest of the distiller grains liquor after anaerobic digestion and membrane filtration are reused as the alcohol fermentation mixture water for fermentation. As the method of the invention reduces the concentration of the mixture and the difficulty of conveying the material liquid, the addition amount of the liquefaction enzyme and the power consumption are further reduced, the microorganisms in the anaerobic digestion effluent can be completely removed by the membrane filtration, thereby eliminating the competitive inhibitionon the alcohol fermentation of the Saccharomyces cerevisiae and the like; the alcohol concentration obtained by the ring fermentation process of the invention is increased by 15.6%-26.3% compared with the alcohol concentration obtained by the tap water ingredient. The method not only reduces production cost, but also increases alcohol output.

Description

technical field [0001] The invention relates to an alcohol double-ring production method using cassava as the main raw material, and belongs to the technical field of waste water treatment and alcohol fermentation industry. Background technique [0002] Alcohol is one of the most important bulk fermentation products in my country's fermentation industry. In 2017, there were 131 alcohol production enterprises above designated size nationwide, with a total output of 8.3 million tons, ranking third in the world. In September 2017, fifteen ministries and commissions including the National Development and Reform Commission, the Energy Bureau, and the Ministry of Finance jointly issued the "Implementation Plan on Expanding the Production of Biofuel Ethanol and Promoting the Use of Ethanol Gasoline for Vehicles." The plan proposes that by 2020, the use of ethanol gasoline for vehicles will be promoted nationwide, basically achieving full coverage. At that time, my country's fuel ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C12P7/06C12P7/08C12P19/14
CPCC12P7/06C12P7/08C12P19/14Y02E50/10
Inventor 王柯张建华毛忠贵张宏建唐蕾陈旭升
Owner JIANGNAN UNIV
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