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Method for fermenting and preparing biological butyl alcohol by using lignocellulose biomass as raw material

A lignocellulosic and bio-butanol technology, applied in the field of bioengineering, can solve problems such as unfavorable fermentation by fermentation inhibitors, and achieve the effects of reducing fermentation energy consumption, promoting income increase, and realizing sustainable utilization.

Inactive Publication Date: 2010-06-23
NANJING UNIV OF TECH
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  • Abstract
  • Description
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Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a method for preparing bio-butanol by fermenting lignocellulosic biomass as raw material to solve the problem that the preparation of bio-butanol by dilute acid hydrolysis of hemicellulose is prone to produce fermentation inhibitors and is not conducive to fermentation problem

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  • Method for fermenting and preparing biological butyl alcohol by using lignocellulose biomass as raw material
  • Method for fermenting and preparing biological butyl alcohol by using lignocellulose biomass as raw material

Examples

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Embodiment 1

[0024]Butanol is prepared by fermenting corn stalks as raw material. Dilute acid hydrolysis conditions are: 2% (v / v) sulfuric acid solution, the ratio of raw material to dilute acid is 18% (w / v), and the hydrolysis temperature is 121°C. The hydrolysis time is 120min, the hydrolyzate is filtered, the sulfate radical in the filtrate is neutralized with milk of lime, the precipitate is filtered off, and the supernatant is concentrated to a total reducing sugar concentration of 150g / L.

[0025] To detoxify the hydrolyzed sugar solution, firstly, the organic ultrafiltration membrane with a molecular weight cut-off of 5000 Daltons is used to separate the hydrolyzed sugar solution, the operating pressure is 0.3Mpa, pH5.0, and the operating temperature is 25°C. Porous adsorption resin fixed bed adsorption detoxification, pH 5.0, temperature 25°C, the volume of the treated hydrolyzed sugar solution is 15 times the volume of the resin bed. After the above treatment, the removal rate of ...

Embodiment 2

[0032] Use bagasse as raw material to ferment butanol, dilute acid hydrolysis conditions are: 1.5% (v / v) of sulfuric acid, the ratio of raw material to dilute acid to liquid is 15% (w / v), hydrolysis temperature is 126°C, acid The hydrolysis time is 90 minutes, the hydrolyzate is filtered, the sulfate radical in the filtrate is neutralized with milk of lime, the precipitate is filtered off, and the supernatant is concentrated to a total reducing sugar concentration of 200g / L.

[0033] To detoxify the hydrolyzed sugar solution, firstly, the organic ultrafiltration membrane with a molecular weight cut-off of 1500 Daltons is used to separate the hydrolyzed sugar solution. The operating pressure is 0.5Mpa, pH4.5, and the operating temperature is 30°C. Porous adsorption resin fixed bed adsorption detoxification, pH 4.5, temperature 25 ° C, the volume of the treated hydrolyzed sugar solution is 20 times the volume of the resin bed, activated carbon adsorption is carried out on the sug...

Embodiment 3

[0041] Fermentation of butanol with corncobs as raw material, dilute acid hydrolysis conditions of corn stalks: 3% (v / v) sulfuric acid, 20% (w / v) solid-liquid ratio of raw materials and dilute acid, hydrolysis temperature 130°C , the acid hydrolysis time is 180min, the hydrolyzate is filtered, the sulfate in the filtrate is neutralized with milk of lime, the precipitate is filtered off, and the supernatant is concentrated to a total reducing sugar concentration of 150g / L. To detoxify the hydrolyzed sugar solution, the hydrolyzed sugar solution is first separated by a ceramic ultrafiltration membrane with a molecular weight cut-off of 5000 Daltons. The operating pressure is 0.3Mpa, pH5.0, and the operating temperature is 25°C. The filtrate is collected and then passed through The regenerated macroporous adsorption resin is fixed-bed adsorption detoxification, pH 4.0, temperature 25°C, and the volume of the treated hydrolyzed sugar solution is 25 times the volume of the resin bed...

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Abstract

The invention discloses a method for fermenting and preparing biological butyl alcohol by using lignocellulose biomass as raw material. Dilute acid is used to hydrolyze lignocellulose biomass to prepare multi-component sugar solution; detoxication treatment and sterilization treatment are conducted to the multi-component sugar solution through membrane separation method and adsorption separation method, sterilization treatment is conducted to the multi-component sugar solution through the membrane separation method, then sterilization treatment is conducted to fermentation culture medium containing no carbon source under high temperature, and finally the sterilized multi-component sugar solution and the sterilized fermentation culture medium containing no carbon source are combined together to prepare fermentation culture medium; butyl alcohol production strains are inoculated in the fermentation culture medium and biological butyl alcohol is prepared through fermentation; and solid-liquid separation treatment is conducted to the fermented liquid and the liquid is distilled to obtain butyl alcohol, acetone and ethyl alcohol. The invention solves the problems of 'striving for grains with people and striving for land with grains' and high raw material cost existing in the traditional butyl alcohol fermentation and production method, and realizes the multiple utilization of lignocellulose biomass.

Description

technical field [0001] The invention belongs to the technical field of bioengineering, and in particular relates to a method for preparing bio-butanol by fermenting lignocellulosic biomass as a raw material. Background technique [0002] Butanol, also known as n-butanol, is an important organic chemical raw material, which can be used as a solvent for paints and surface coatings, and is also used to produce dibutyl phthalate (DBP) and butyl benzyl phthalate (BBP ) and other plasticizers, the global demand for butanol reached 3 million tons in 2006. At present, butanol as a new fuel with great potential has attracted great attention at home and abroad. Compared with ethanol, butanol has the advantages of high energy density, high stability to water, direct use in internal combustion engines, and convenient transportation. The production methods of butanol mainly include propylene oxo synthesis and fermentation. Since the production of butanol by fermentation has the characte...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C12P7/16C12P7/28C12P7/10C12R1/145
CPCY02E50/16Y02E50/10
Inventor 姜岷吴昊郭亭任晓乾陈啸鹏孙佰军蔡恒欧阳平凯韦萍
Owner NANJING UNIV OF TECH
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