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Method and system for preparing ethanol based on sweet broomcorn straw solid fermentation

A technology for solid fermentation and sweet sorghum, applied in biochemical equipment and methods, solid-phase fermentation bioreactors, fermentation, etc., can solve the problems of high pretreatment cost, shorten fermentation time, and low efficiency, and achieve improved conversion efficiency, The effect of improving utilization rate and production efficiency

Inactive Publication Date: 2007-09-12
TSINGHUA UNIV
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0004] The purpose of the present invention is to aim at the defects of high raw material pretreatment cost, long fermentation period and low efficiency of solid-state fermentation using traditional brewing technology in the current liquid fermentation process of sweet sorghum ethanol production process, and to select and improve the successful ethanol fermentation bacteria according to the present invention Based on seed and solid fermentation technology, combined with drum type solid-state fermentation tank integration process to shorten the fermentation time and increase the yield of ethanol production, and then match with subsequent processing units such as solid-state distillation to realize the production of fuel ethanol by fermenting sweet sorghum stalks Commercial production of the new process

Method used

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  • Method and system for preparing ethanol based on sweet broomcorn straw solid fermentation
  • Method and system for preparing ethanol based on sweet broomcorn straw solid fermentation

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Embodiment 1

[0045] Sweet sorghum stalks with a water content of 70% and a Brix of 15° (the actual stalk total sugar content is 9-10%, reducing sugar 4-5%) are used as raw materials, cut and crushed into filaments (diameter 1-2mm , length is less than 30mm), through the TSH-Sc-001 (General Microbiology Center of China Microorganism Culture Collection Management Committee, registration number, 1949, preservation date, March 6, 2007) bacterial classification directly through the present invention's selection and cultivation The solid-state fermentation is carried out in a solid fermenter, the inoculum size is 10% (V / V), the fermentation time is 48 hours, and the stirring speed is controlled at 1-20 rpm. Ethanol is obtained after distillation, and the ethanol yield is 4.23g / 100g sorghum stalk, and the conversion rate is 87.16% of the theoretical yield of ethanol; the residual total sugar content is 0.37%, and the reducing sugar content is 0.20%.

Embodiment 2

[0047] Use 1 ton of sweet sorghum stalks with a water content of 68% and a Brix of 18° (the actual total sugar content of the stalks is 13%, reducing sugar 6%) as raw materials, cut and crushed into filaments (diameter 1-2mm, length Less than 30mm), the strains of TSH-Sc-001 (General Microorganism Center of China Microbial Strain Preservation Management Committee, registration number, 1949, preservation date, March 6, 2007) bacterial classification directly on solid by the present invention's selection and cultivation The solid-state fermentation is carried out in the fermenter, the inoculum size is 10% (V / V), the fermentation time is 44hr, and the stirring speed is controlled at 1-20rpm. After distillation, 60.5 kg of ethanol is obtained, and the yield of ethanol is 6.05Kg / 100Kg 高粱秆 , the conversion rate is 90.36% of the theoretical yield of ethanol; the residual total sugar content is 0.751%, and the reducing sugar content is 0.375%.

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Abstract

This invention relates to a method and system of preparing ethanol based on the solid state fermentation of sweet sorghum stem, belonging to the ethanol production technology of solid state fermentation. It includes the following key processes and device: raw materials smash is to choose the suitable mill to smash sweet sorghum stalk, strain addition is to add ethanol bacteria at the entrance of solid-state fermentation tank, solid-state fermentation is that the raw materials added bacteria is fermented in the slant rotor solid-state fermentation tank, solid distillation is to distill the solid-state fermented materials to obtain ethanol.

Description

technical field [0001] The invention relates to a technology and system for producing ethanol by solid-state fermentation, in particular to a technology and equipment for producing ethanol by solid-state fermentation of sweet sorghum stalks, and belongs to the technical field of solid-state fermentation for ethanol production. Background technique [0002] After entering the 21st century, in order to achieve sustainable and coordinated development of energy, environment and economy, countries around the world including China are committed to the development of renewable energy to accelerate the pace of energy structure adjustment. Therefore, research and development of renewable biomass energy is of great strategic significance. In order to explore alternatives to petroleum energy, international research and development institutions have targeted sweet sorghum, a green energy crop that effectively utilizes solar energy through photosynthesis. The production of ethanol from ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C12P7/10C12M1/00
CPCC12M21/12C12M21/16Y02E50/16C12M27/14Y02E50/10
Inventor 李十中
Owner TSINGHUA UNIV
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