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Method for industrial production of ethyl alcohol by using straw or corn or Chinese sorghum straw

The technology of sorghum straw and straw is applied in the field of processing technology for producing ethanol, and can solve the problems of large amount of enzyme, environmental pollution, large amount of acid and alkali, etc.

Inactive Publication Date: 2007-09-26
湖南省原子能农业应用研究所 +1
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Problems solved by technology

At present, in industrial production and application, the main problems are high straw transportation and storage costs, large acid and alkali consumption and low recovery, serious environmental pollution, expensive recovery equipment, high production cost of cellulase, low enzymatic hydrolysis efficiency, and large enzyme consumption, etc. question

Method used

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Examples

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Embodiment Construction

[0005] Press 150kg of rice straw into straw bricks with a volume of 1 cubic meter, and put them into a 200,000-curie 60 Co-γ radiation source for radiation treatment, the radiation dose is 0.5~2.0×10 6 Gy, mechanically pulverize the irradiated straw through a 200-mesh sieve, then extract it with hot water to obtain hemicellulose, then use ethanol to extract the lignin, mix the rice straw powder with the cellulose enzyme solution and hydrolyze it, and the enzyme The solution temperature is 48°C, the pH value is 4.8, and the enzyme concentration is 35U / g. A nuclear pore membrane of 1-2 μm is used to separate the enzymatic hydrolysis substrate from the degradation product. The pentose and hexose sugars produced by the degradation of hemicellulose and cellulose were simultaneously fermented by Saccharomyces cerevisiae and Pichia pastoris, and the wet weight of yeast was 0.03g / mL of fermentation broth. The fermentation temperature is 32°C, and the ethanol produced is dehydrated a...

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Abstract

The invention discloses a processing craft with rice straw or corn or sorghum straw to produce industrial alcohol, which comprises the following steps: pressing the rice straw and straw to brick; disposing with 60Co-gama ray of 0.5-2.0X106Gy or electron-beam accelerator; grinding with mechanical; screening through 200 order sieve; leaching with hot water; stripping lignin with alcohol; degrading enzyme; separating 1-2 mu m cord hole film; synchronous-saccharifying saccharomyces cerevisiae and pichia; dispersing and yeasting; dewatering and separating the alcohol; getting the product.

Description

technical field [0001] The invention relates to a processing technology for industrially producing ethanol from rice straw, corn or sorghum straw. Background technique [0002] The traditional straw lignocellulose degradation process is to pretreat straw lignocellulose with dilute acid, dilute alkali, microwave, ultrasonic wave, steam explosion, etc., directly degrade cellulase into reducing sugar, and produce ethanol liquid through a step-by-step saccharification and fermentation process fuel. At present, in industrial production and application, the main problems are high straw transportation and storage costs, large acid and alkali consumption and low recovery, serious environmental pollution, expensive recovery equipment, high production cost of cellulase, low enzymatic hydrolysis efficiency, and large enzyme consumption, etc. question. Contents of the invention [0003] The purpose of the present invention is to provide a process for producing ethanol liquid fuel fr...

Claims

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Application Information

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IPC IPC(8): C12P7/10
CPCY02E50/16Y02E50/10
Inventor 王克勤熊兴耀
Owner 湖南省原子能农业应用研究所
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