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Comprehensive utilization method of lignocellulose biomass

A lignocellulose and biomass technology, applied in the field of comprehensive utilization of cellulose, hemicellulose and lignin in lignocellulosic biomass, can solve the problem of low enzymatic extraction rate of cellulose, cellulose, hemicellulose and lignin In order to improve the extraction rate, reduce damage and increase the solid content

Active Publication Date: 2013-04-17
JINAN SHENGQUAN GROUP SHARE HLDG
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  • Application Information

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Problems solved by technology

[0008] For this reason, the technical problem to be solved by the present invention is to overcome the problem that cellulose, hemicellulose and lignin cannot be comprehensively utilized in the prior art, and the extraction rate of cellulose enzymolysis is low, thus proposing a kind of wood fiber Comprehensive utilization method of prime biomass

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  • Comprehensive utilization method of lignocellulose biomass
  • Comprehensive utilization method of lignocellulose biomass
  • Comprehensive utilization method of lignocellulose biomass

Examples

Experimental program
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Effect test

Embodiment 1

[0070] (1) Alkali solution to extract alkali lignin

[0071] 10.65kg of corncobs (mass composition: moisture 6.12%, cellulose 35.19%, hemicellulose 32.01%, lignin 23.7%, other 2.95%, the same below) are pulverized and then mixed with alkali solution, wherein the volume of liquid and solid The ratio is 5: 1, the concentration of sodium hydroxide is 6%, then the temperature is raised to 70° C., after 1 hour of cooking and alkali hydrolysis, the alkali hydrolysis residue and alkali lignin solution are separated, and the alkali hydrolysis residue is washed with 10 kg of water. The cleaning solution is combined with the alkali lignin solution; 20.38kg of alkali hydrolysis residue (moisture content is about 65%) and 49.61kg of alkali lignin solution are finally obtained; after the alkali lignin solution is separated and concentrated by membrane equipment, add 10kg of water to dilute , Concentrate again, finally obtain 6.29kg of alkali lignin concentrate, and reclaim 53.32kg of alkal...

Embodiment 2

[0084] (1) Alkali solution to extract alkali lignin

[0085] Raw material and method are identical with embodiment 1 step (1), and difference is, liquid-solid volume ratio is 20: 1, and the concentration of sodium hydroxide is 5%, and the temperature of alkaline solution treatment is 100 ℃, and the time is 2 hours. Finally, 19.29kg of alkali hydrolysis residue (with a water content of about 65%) and 6.75kg of alkali lignin concentrate were obtained, and 203.9kg of alkali liquor was recovered. The solid content of the concentrated solution is 25.2%, the alkali lignin content of the concentrated solution is 23.6%, the residual alkali content of the concentrated solution is 0.7%, and the ash content of the concentrated solution is 1.6%. The content of is 4.02%, and the recovery rate of alkali is 82%. The extraction rate of alkali lignin is 63%.

[0086] (2) acid hydrolysis

[0087] Get all the alkali hydrolysis residues obtained by the alkali solution treatment in the present ...

Embodiment 3

[0091] (1) Alkali solution to extract alkali lignin

[0092] Raw material and method are identical with embodiment 1 step (1), and difference is that liquid-solid volume ratio is 10: 1, and the concentration of sodium hydroxide is 8%, and the temperature of alkaline solution treatment is 40 ℃, and the time is 6 hours. Finally, 21.47kg of alkali hydrolysis residue (with a water content of about 65%) and 5.98kg of alkali lignin concentrate were obtained, and 97.87kg of alkali liquor was recovered. The solid content of the concentrated solution is 25.7%, the alkali lignin content of the concentrated solution is 24.1%, the residual alkali content of the concentrated solution is 0.5%, and the ash content of the concentrated solution is 1.6%. The content is 6.95%, and the recovery rate of alkali is 85%. The extraction rate of alkali lignin is 57%.

[0093] (2) acid hydrolysis

[0094] Get all the alkali hydrolysis residues obtained by the alkali solution treatment in the present ...

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Abstract

A comprehensive utilization method of lignocellulose biomass comprises the following steps of: (a) alkaline hydrolysis processing: (i) processing the lignocellulose biomass by an alkaline solution to dissolve the lignin in the alkaline solution; (ii) then performing filtration and washing to obtain alkaline hydrolysis residues and liquid; (iii) separating the obtained liquid by a membrane device, and concentrating to obtain an alkaline lignin solution; (b) acid hydrolysis: performing acid hydrolysis of the alkaline hydrolysis residues, separating to obtain a pentose solution and acid hydrolysis residues; (c) cellulose enzymatic hydrolysis: performing enzymatic hydrolysis of the acid hydrolysis residues by using cellulase produced by a penicillium (Penicillium decumbens PD-G3-08), and then performing fermentation to produce ethanol. The method realizes the maximum resource utilization of lignocellulose biomass.

Description

technical field [0001] The invention relates to a method for comprehensively utilizing lignocellulosic biomass, in particular to a method for comprehensively utilizing cellulose, hemicellulose and lignin in lignocellulosic biomass. Background technique [0002] With the depletion of fossil fuel resources and the increasing environmental pollution, the use of renewable energy as a substitute for petrochemical products has become increasingly important. Fuel ethanol is the main form of biomass liquid energy and the most likely substitute for fossil fuels. At present, the world's ethanol production mainly uses starches (corn, cassava, etc.) and sugars (sugar cane, sugar beets, etc.) as raw materials for fermentation. The technology of producing ethanol by microbial fermentation is mature, but the high cost of raw materials restricts the industrial application of grain fermentation to produce ethanol. At the same time, there are disadvantages such as competition with people for...

Claims

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Application Information

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IPC IPC(8): C12P19/14C12P19/02C08H7/00C13K13/00C12R1/80
Inventor 唐一林江成真张恩选高绍丰韩文斌崔建丽马军强焦峰张茜刘洁
Owner JINAN SHENGQUAN GROUP SHARE HLDG
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