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Continuous solid-state fermentation process and device for preparing fuel ethanol

A solid-state fermentation and fuel ethanol technology, applied in solid-phase fermentation bioreactors, fermentation, biofuels, etc., can solve the problems of high pretreatment cost of liquid fermentation raw materials, low production efficiency of solid-state fermentation, low ethanol yield, etc., to achieve The effect of saving manpower, saving time and manpower, improving product quality and productivity

Active Publication Date: 2011-05-25
TSINGHUA UNIV
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Problems solved by technology

[0006] In order to solve the problems of high pretreatment cost of liquid fermentation raw materials, low ethanol yield, low production efficiency of solid-state fermentation and difficulty in continuous production in the process of producing ethanol from sweet sorghum straw, the present invention proposes a A continuous solid-state fermentation process and device for producing fuel ethanol, and then matched with the subsequent processing unit to realize the continuous production of fuel ethanol from sweet sorghum straw

Method used

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  • Continuous solid-state fermentation process and device for preparing fuel ethanol
  • Continuous solid-state fermentation process and device for preparing fuel ethanol
  • Continuous solid-state fermentation process and device for preparing fuel ethanol

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Embodiment 1

[0033] The mature sweet sorghum stalks are harvested, and sweet sorghum stalks with a water content of 70%, a total sugar content of 11%, and a reducing sugar content of 7% are used as raw materials, and they are crushed into filaments with a diameter of 1 to 2 mm and a length of less than 30 mm. At the same time, the TSH-Sc-001 strain is added to the closed silo, mixed with the crushed materials, and then continuously fermented in the continuous solid-state fermentation tank. The inoculation amount of the fermenting bacteria is 10% (V / W), the operating parameters are adjusted, the temperature in the tank is maintained at 30-36°C, the fermentation time is 30h, and the rotation speed of the fermentation tank is 0.25rpm. After fermentation, the ethanol yield was 92.2% and the total sugar conversion rate was 98.6%.

Embodiment 2

[0035] The mature sweet sorghum stalks are harvested, and the sweet sorghum stalks with a water content of 70%, a total sugar content of 12%, and a reducing sugar content of 8% are used as raw materials and crushed into filaments with a diameter of 1 to 2 mm and a length of less than 30 mm. At the same time, the TSH-Sc-001 strain is added to the closed silo, mixed with the crushed materials, and then continuously fermented in the continuous solid-state fermentation tank. The inoculation amount of the fermentation bacteria is 10% (V / W), and the operating parameters are adjusted to maintain the temperature in the tank at 30-36°C, the fermentation time is 36 hours, and the rotation speed of the fermentation tank is 0.1 rpm. After fermentation, the ethanol yield was 94.1%, and the total sugar conversion rate was 99.2%.

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Abstract

The invention belongs to the technical field of fuel ethanol production through microbial fermentation, in particular to a solid-state fermentation process and a device for preparing fuel ethanol. The process mainly comprises two steps that: strain adding and continuous solid-state fermentation, i.e. fermentation strains are added into fermentation raw materials before crushed materials enter a continuous fermentation tank body, and then, the mixed fermentation materials are continuously fermented in the continuous solid-state fermentation tank so that fermentable sugar is converted into ethanol. The continuous solid-state fermentation is adopted in the invention, the fermentable sugar content in straws can be sufficiently utilized, the use of preservatives is avoided, the yield of the ethanol is improved, the continuous solid-state fermentation device is adopted, the traditional production mode is changed, the continuity of the solid-state fermentation process is really realized, therotating speed of the fermentation tank body and the plate shoveling angle can be regulated, and the adjustability and the controllability of the production are enhanced.

Description

Technical field [0001] The invention belongs to the technical field of microbial fermentation to produce fuel ethanol. Specifically, it relates to a solid-state fermentation process and device for producing fuel ethanol, in particular to a continuous solid-state fermentation process and device for producing fuel ethanol based on carbohydrate raw materials. Background technique [0002] With the development of society, fossil resources have gradually been exhausted, and countries around the world have begun to devote themselves to the research of renewable energy materials, and fuel ethanol, a green new energy alternative to petroleum fuels, has received extensive attention at home and abroad. Because its combustion characteristics are very close to gasoline, it can be mixed with gasoline in a certain proportion, or directly used as fuel, which greatly reduces the emission of harmful gases and has broad development space. [0003] Due to the rapid increase in the world’s population...

Claims

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Application Information

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IPC IPC(8): C12P7/06
CPCC12M21/12C12M21/16C12M33/16C12M27/20Y02E50/17Y02E50/10
Inventor 李十中李光明候文慧李天成
Owner TSINGHUA UNIV
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