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Continuous solid-state fermentation device for preparing fuel ethanol

A kind of solid state fermentation, fuel ethanol technology

Active Publication Date: 2013-10-16
TSINGHUA UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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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 device for preparing fuel ethanol
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Embodiment 1

[0033] 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 crushed into filaments with a diameter of 1-2 mm and a length of less than 30 mm. At the same time, TSH-Sc-001 strains are added into the closed silo, mixed with the pulverized material, and then continuously fermented in a continuous solid-state fermenter. The inoculation amount of the fermenting bacteria was 10% (V / W), and each operating parameter was adjusted to keep the temperature in the tank at 30-36° C., the fermentation time was 30 h, and the rotation speed of the fermenter was 0.25 rpm. After fermentation, the yield of ethanol is 92.2%, and the conversion rate of total sugar is 98.6%.

Embodiment 2

[0035]Mature sweet sorghum stalks are harvested, and 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 1-2 mm and a length of less than 30 mm. At the same time, TSH-Sc-001 strains are added into the closed silo, mixed with the pulverized material, and then continuously fermented in a continuous solid-state fermenter. The inoculum amount of the fermenting bacteria was 10% (V / W), and each operating parameter was adjusted to keep the temperature in the tank at 30-36° C., the fermentation time was 36 hours, and the rotation speed of the fermenter was 0.1 rpm. After fermentation, the yield of ethanol is 94.1%, and the conversion rate of total sugar is 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, the rotating 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 producing fuel ethanol by microbial fermentation. It specifically 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 sugary raw materials. Background technique [0002] With the development of society, fossil resources have been gradually exhausted, and countries around the world have begun to devote themselves to the research of renewable energy materials, and fuel ethanol, a new green energy that can replace petroleum fuels, has attracted widespread attention at home and abroad. Because its combustion characteristics are very close to those of gasoline, it can be mixed with gasoline in a certain proportion, and can also be used directly as fuel, which greatly reduces the emission of harmful gases and has broad development space. [0003] Due to the rapid increa...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C12P7/06C12M1/00
CPCY02E50/17C12M21/12C12M21/16C12M27/20C12M33/16Y02E50/10
Inventor 李十中李光明候文慧李天成
Owner TSINGHUA UNIV
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