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A method for enriching high-quality lignin from lignocellulosic hydrolysis residue

A technology for lignocellulose and lignin, which is applied in the field of high-value utilization of lignin to achieve the effects of environmental friendliness, less by-products and mild reaction conditions

Active Publication Date: 2020-11-06
四川中沼生物能源检测有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Currently, conventional separation techniques can effectively remove components such as protein, ash, and fat, but there is a lack of economically feasible extraction methods that can separate lignin from covalently linked sugars without significantly affecting the natural structure of lignin.

Method used

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  • A method for enriching high-quality lignin from lignocellulosic hydrolysis residue
  • A method for enriching high-quality lignin from lignocellulosic hydrolysis residue
  • A method for enriching high-quality lignin from lignocellulosic hydrolysis residue

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] (1) Prepare the inoculum: take the sterilized sludge as the matrix (the mass fraction of its TS (total solids) is 0.86%, the mass fraction of VS (volatile solids) is 0.52%, VS / TS=60.4%), to The bacteria agent containing the following bacteria is added to the sterilized sludge, counted according to the number of bacteria:

[0039]

[0040] After the inoculum was prepared, the inoculum was cultured at 40°C until no gas was produced, and then inoculated in the hydrolyzed residue of corn stalks; the inoculation ratio of the inoculum to the hydrolyzed residue of corn stalks was 1.5:1 by weight;

[0041] (2) After inoculation, adjust the pH value of the system to 7.0, then seal it and introduce nitrogen to discharge the air, and then carry out anaerobic digestion treatment in an anaerobic environment. The temperature of anaerobic digestion is 35 ° C, and the time for 40 days.

[0042] The corn stalk hydrolysis residue before and after the treatment of Example 1 is subject...

Embodiment 2

[0047](1) Prepare the inoculum: take the sterilized sludge as the matrix (the mass fraction of its TS (total solids) is 0.86%, the mass fraction of VS (volatile solids) is 0.52%, VS / TS=60.4%), to The bacteria agent containing the following bacteria is added to the sterilized sludge, counted according to the number of bacteria:

[0048]

[0049]

[0050] After preparing the inoculum, culture the inoculum at 40°C until no gas is produced, and then inoculate it in the hydrolyzed residue of corn stalks; the inoculation ratio of the inoculum to the hydrolyzed residue of corn stalk is 1:1 by weight;

[0051] (2) After inoculation, adjust the pH value of the system to 8.0, then seal it and introduce nitrogen gas to discharge the air, and then carry out anaerobic digestion treatment in an anaerobic environment. The temperature of anaerobic digestion is 55 ° C, and the time for 30 days.

[0052] The corn stalk hydrolysis residue before and after the treatment of Example 2 was su...

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Abstract

The invention discloses a method for enriching high-quality lignin from lignocellulose hydrolysis residue, comprising the following steps: (1) inoculating an inoculum into the hydrolysis residue after lignocellulose biorefining; (2) inoculating Finally, the pH value of the system is adjusted to 7.0-8.0, and then sealed and fed with nitrogen to discharge the air, and then anaerobic digestion is performed in an anaerobic environment to obtain a product with low polysaccharide content and high lignin content. The invention can selectively decompose the refractory polysaccharides in lignocellulose hydrolysis residues, retain the integrity of lignin, enrich lignin naturally without modifying lignin structure and properties, and finally obtain polysaccharides A product with low content and high lignin content, allowing lignin to be recovered and converted into high-value products.

Description

technical field [0001] The invention relates to the field of high-value utilization of lignin, in particular to a method for enriching high-quality lignin from lignocellulose hydrolysis residue. Background technique [0002] Lignocellulosic biomass is one of the most abundant renewable resources on earth, and its energy utilization can help alleviate energy crisis and greenhouse gas emissions. In recent years, the conversion of lignocellulose into fuels, bio-based products and electricity through biorefining has gradually become a research hotspot in various countries. For most of the biorefinery of lignocellulose, a large amount of lignin-rich hydrolysis residue (accounting for about 25-35% of the total amount) will be generated while biochemically converting it into biofuel. At present, this part of waste residue is usually used by biorefineries for power generation and heat production, and its utilization value is very low. In fact, the aromatic compounds contained in l...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C12P39/00C12P7/02C12R1/01C12R1/07
CPCC12P7/02C12P39/00
Inventor 汤晓玉祝其丽李强王文国吴波朱桃
Owner 四川中沼生物能源检测有限责任公司
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