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Continuous solid fermentation ethanol production device having self-control system and technology thereof

A solid-state fermentation and solid-state fermenter technology, which is applied in solid-phase fermentation bioreactors, specific-purpose bioreactors/fermenters, fermentation, etc. Deal with high cost problems to achieve the effect of reducing production costs, saving manpower, saving time and manpower

Active Publication Date: 2014-01-15
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In order to solve the problems of high pretreatment cost of liquid fermentation raw materials, low production efficiency of solid-state fermentation and difficulty in continuous production in the process of ethanol production from sweet sorghum straw

Method used

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  • Continuous solid fermentation ethanol production device having self-control system and technology thereof
  • Continuous solid fermentation ethanol production device having self-control system and technology thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] Embodiment 1 (continuous fermentation)

[0048] Harvest mature sweet sorghum stalks, use sweet sorghum stalks with a water content of 70%, a total sugar content of 11%, and a reducing sugar content of 7% as raw materials, and crush them into filaments with a diameter of 1-2 mm and a length of less than 30 mm. At the same time, CGMCC1949 strains are added to the screw feeding feeder, mixed with crushed materials, and then continuously fermented in a continuous solid-state fermenter. The inoculum amount of fermentation bacteria is 10% (V / W), adjust the operating parameters, keep the temperature in the tank at 25-40°C, the fermentation time is 24 hours, and the rotation speed of the fermentation tank is 0.25rpm. After fermentation, the yield of ethanol was 91.2%, and the conversion rate of total sugar was 94.2%.

Embodiment 2

[0049] Embodiment 2 (continuous fermentation)

[0050] Harvest mature sweet sorghum stalks, use sweet sorghum stalks with a water content of 70%, a total sugar content of 12%, and a reducing sugar content of 8% as raw materials, and crush them into filaments with a diameter of 1-2 mm and a length of less than 30 mm. At the same time, CGMCC1949 strains are added to the screw feeding feeder, mixed with crushed materials, and then continuously fermented in a continuous solid-state fermenter. The inoculum amount of fermentation bacteria is 15% (V / W), adjust the operating parameters, keep the temperature in the tank at 25-40°C, the fermentation time is 30 hours, and the rotation speed of the fermentation tank is 0.1rpm. After fermentation, the yield of ethanol was 92.3%, and the conversion rate of total sugar was 96.4%.

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Abstract

The invention belongs to the technical field of microorganism fermentation fuel ethanol production, and specifically relates to a continuous solid fermentation ethanol production device having a self-control system and a technology thereof. The technology mainly comprises two steps, namely bacterium addition and continuous solid fermentation, and specifically comprises the following steps: adding fermentation bacteria into pulverized raw materials, when the pulverized raw materials enter into a continuous solid fermentation tank; and then allowing the raw materials mixed with fermentation bacteria to carry out fermentation reactions in the continuous solid fermentation tank to convert the fermentable sugars into ethanol. The technology adopts a continuous solid fermentation method, can fully utilize the fermentable sugars in straws, avoids the usage of antiseptic, saves the production cost and energy, which is needed in the process of straw squeezing, reduces a great amount of waterless discharge, and improves the production efficiency and yield; moreover, the technology adopts a self-control continuous solid fermentation device, changes the conventional production mode, really achieves the continuation and automation of solid fermentation technology; furthermore, the revolution speed of the fermentation tank body and the angle of the cloth plate are adjustable, and thus the adjustability and controllability of production is strengthened.

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 device and process for producing fuel ethanol, in particular to a self-controlled continuous solid-state fermentation device and process 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 ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C12M1/00C12P7/10
CPCY02E50/16C12M21/12C12M21/16C12M27/10C12M27/20C12M33/04C12M33/16C12M37/04C12P7/10C12M23/50C12M29/06C12M33/18C12M41/12C12P7/065Y02E50/10C12M41/00
Inventor 李十中仉磊李光明
Owner TSINGHUA UNIV
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