Biological-chemical combined pretreatment method of lignocellulosic materials

A technology for lignocellulose and microbial treatment, which is used in fiber raw material treatment, pretreatment with acidic compounds, textiles and papermaking, etc., can solve the problems of sugar loss, low efficiency, long pretreatment time, etc. Processing efficiency, the effect of reducing the wrapping effect

Active Publication Date: 2013-09-04
CHENGDU INST OF BIOLOGY CHINESE ACAD OF S
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, according to domestic and foreign research reports, biological methods have disadvantages such as long pretreatment time, low efficiency, and loss of sugar components.

Method used

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  • Biological-chemical combined pretreatment method of lignocellulosic materials

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Example 1: After drying corn stalks with constant weight (33.31% cellulose, 26.82% hemicellulose, and 21.46% lignin) to 10 meshes, put them into the microbial treatment tank 19 from the feed port 20, and open the valve 8 1. Inject the cultured Trametes trichotillobacter seed liquid from the strain tank 18, inoculate 5% (weight percent, dry weight), adjust the water content to 65%, open the vent 22, and treat at 30°C for 5 days. Open the discharge port 20, open the material conveyor 17 and load the raw material processed by microorganisms into the dilute acid circulation reactor 11 from the feed port 12, open the valve 1 and the valve 2, and inject 0.5% dilute acid from the acid storage tank 9. Sulfuric acid is placed in the reactor 11, the solid-to-liquid ratio of corn stalks and dilute sulfuric acid is 1:10; open valve 3, valve 4, close valve 1, valve 2, start the circulation pump 16, and circulate the reaction at 90°C for 2h, during the reaction The liquid part is cir...

Embodiment 2

[0031] Example 2: After crushing dried corn stalks (33.31% cellulose, 26.82% hemicellulose, and 21.46% lignin) to 10 meshes, put them into the microbial treatment tank 19 from the feed port 20, and open the valve 8 1. Inject the cultured Trametes versicolor strain solution from the strain tank 18, the inoculation amount is 5% (weight percentage, dry weight), adjust the water content to 65%, open the vent 22, and treat at 30°C for 5 days. Open the discharge port 20, open the material conveyor 17 and load the raw material processed by microorganisms into the dilute acid circulation reactor 11 from the feed port 12, open the valve 1 and the valve 2, and inject 0.5% dilute acid from the acid storage tank 9. Sulfuric acid is placed in the reactor 11, the solid-to-liquid ratio of corn stalks and dilute sulfuric acid is 1:10; open valve 3, valve 4, close valve 1, valve 2, start the circulation pump 16, and circulate the reaction at 90°C for 2h, during the reaction The liquid part is ...

Embodiment 3

[0032] Example 3: The dried corn stalks (cellulose 33.31%, hemicellulose 26.82%, lignin 21.46%) were crushed to 10 meshes and loaded into the microbial treatment tank 19 from the feed port 20, and the valve 8 was opened 1. Inject the cultured Trametes trichotillobacter seed liquid from the strain tank 18, inoculate 5% (weight percent, dry weight), adjust the water content to 65%, open the vent 22, and treat at 30°C for 5 days. Open the discharge port 20, open the material conveyor 17 and load the raw material processed by microorganisms into the dilute acid circulation reactor 11 from the feed port 12, open the valve 1 and the valve 2, and inject 0.5% dilute acid from the acid storage tank 9. Sulfuric acid is placed in reactor 11, the solid-to-liquid ratio of corn stalks and dilute sulfuric acid is 1:10; valve 3 and valve 4 are opened, valve 1 and valve 2 are closed, circulation pump 16 is started, and the reaction is circulated at 85°C for 2 hours. The liquid part is circulat...

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Abstract

The invention belongs to the technical field of biochemical engineering and particularly relates to a method and system for carrying out combined pretreatment on lignocellulosic materials by combining microbiological treatment and dilute acid treatment. The method is characterized by grinding the lignocellulosic materials to 5-60 meshes, then putting the ground lignocellulosic materials in a microbiological treatment tank, and injecting microbiological bacteria liquid for biological treatment for 5-10 days; and putting the materials subjected to microbiological treatment in a dilute acid recycle reactor, injecting dilute acid, and starting a circulating pump to carry out circulating treatment at 80-100 DEG C for 1-4 hours, thus completing pretreatment. The method has the advantages of lowacid consumption, mild operation conditions, low requirements for compression resistance and corrosion resistance of the reactor, low treatment cost, less secondary pollution, environment friendliness and the like.

Description

technical field [0001] The invention belongs to the technical field of biochemical industry, and in particular relates to a method and system for joint pretreatment of lignocellulose raw materials by combining microbial treatment and dilute acid treatment. Background technique [0002] After enzymatic hydrolysis and saccharification of lignocellulosic raw materials, six-carbon sugars mainly composed of glucose and five-carbon sugars mainly composed of xylose can be obtained, which are important raw materials for food and chemical industries. Lignocellulosic raw materials are mainly composed of three major components: cellulose, hemicellulose and lignin. Hemicellulose is used as a molecular adhesive to bind between cellulose and lignin, embedding cellulose molecules in it, forming a natural The barrier makes it difficult for enzymes to contact with cellulose molecules, resulting in slow enzymatic hydrolysis of polysaccharides in lignocellulosic raw materials. Therefore, in o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D21C1/04D21C5/00
Inventor 闫志英刘晓风袁月祥廖银章
Owner CHENGDU INST OF BIOLOGY CHINESE ACAD OF S
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