Method for treating straws through dissolution and regeneration

A technology of dissolving regeneration and treatment method is applied in the field of straw hydrolysis, which can solve the problems of low enzymatic hydrolysis rate of straw cellulose and hemicellulose, and achieve the effects of improving the enzymatic hydrolysis rate and simple treatment method.

Inactive Publication Date: 2015-12-16
GUANGZHOU INST OF ENERGY CONVERSION - CHINESE ACAD OF SCI +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The object of the present invention is to propose a method for dissolving and regenerating straws, aiming at the problem of low enzymatic hydrolysis rate of straw cellulose and hemicellulose treated by the existing straw pretreatment technology, the cellulose and hemicellulose in the treated straws are The enzymatic hydrolysis rate of hemicellulose is greatly improved

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Example 1: Bagasse is crushed and passed through a 20-mesh sieve, mixed with a sulfuric acid ethanol aqueous solution with a sulfuric acid concentration of 1% (m / v) and an ethanol concentration of 60% (v / v) at a solid-to-liquid ratio of 1:6.5, 125 °C pretreatment for 120 minutes, filtered after cooling, washed the filter residue to neutral pH and dried; mixed the pretreated bagasse with N,N-dimethylacetamide at a solid-to-liquid ratio of 1:40, and Activated at 160°C for 40 minutes, filtered and dried after cooling; the activated bagasse was mixed with lithium chloride / N,N-di Methylacetamide solutions were mixed, reacted at 160°C for 180 minutes to obtain a bagasse solution; after cooling, the bagasse solution was injected into water at a volume ratio of 1:3 for regeneration, and washed with water to obtain regenerated bagasse; the regenerated bagasse Add cellulose compound enzyme, cellulose compound enzyme comprises cellulase, β-glucosidase and xylanase activity, and it...

Embodiment 2

[0018] Example 2: crush wheat straw and pass through a 20-mesh sieve, mix it with a sulfuric acid ethanol aqueous solution with a sulfuric acid concentration of 2.5% (m / v) and an ethanol concentration of 60% (v / v) at a solid-to-liquid ratio of 1:7, 125 °C pretreatment for 120 minutes, filtered after cooling, washed the filter residue to neutral pH and dried; mixed the pretreated wheat straw with N,N-dimethylacetamide at a solid-to-liquid ratio of 1:40, and Activated at 160°C for 60 minutes, filtered and dried after cooling; the activated wheat straw was mixed with lithium chloride / N,N-di Methyl acetamide solutions were mixed and reacted at 160°C for 180 minutes to obtain a wheat stalk solution; after cooling, the wheat stalk solution was injected into water at a volume ratio of 1:3 for regeneration, and washed with water to obtain regenerated wheat stalks; the regenerated wheat stalks were Add cellulose compound enzyme, cellulose compound enzyme comprises cellulase, β-glucosid...

Embodiment 3

[0019] Example 3: crush wheat straw and pass through a 20-mesh sieve, and mix it with a sulfuric acid ethanol aqueous solution with a sulfuric acid concentration of 2% (m / v) and an ethanol concentration of 70% (v / v) at a solid-to-liquid ratio of 1:8, 115 °C pretreatment for 180 minutes, filtered after cooling, washed the filter residue to neutral pH and dried; mixed the pretreated wheat straw with N,N-dimethylacetamide at a solid-to-liquid ratio of 1:50, in Activated at 130°C for 90 minutes, filtered and dried after cooling; the activated wheat straw was mixed with lithium chloride / N,N-di Methyl acetamide solutions were mixed and reacted at 170°C for 120 minutes to obtain a wheat stalk solution; after cooling, the wheat stalk solution was injected into water at a volume ratio of 1:4 for regeneration, and washed with water to obtain regenerated wheat stalks; the regenerated wheat stalks were Add cellulose compound enzyme, cellulose compound enzyme comprises cellulase, β-glucosi...

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PUM

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Abstract

The invention discloses a method for treating straws through dissolution and regeneration. The method comprises the following steps: firstly, conducting pretreatment on pulverized straws through an ethanol sulfate water solution to remove hemicellulose and lignose; then drying pretreated straws and activating the dried straws through an organic solvent; secondly dissolving the activated straws into lithium chloride/N,N-dimethylacetamide to obtain a straw solution; thirdly injecting the straw solution into water for regeneration to obtain regenerated straws; finally conducting water washing on the regenerated straws to remove the organic solvent and saline ions, and conducting enzymolysis by adopting cellulose complex enzyme. The straw treating method is simple, and the enzymolysis rates of cellulose and hemicellulose in the straws are greatly improved.

Description

technical field [0001] The invention belongs to the technical field of straw hydrolysis, and in particular relates to a method for treating straw through dissolution and regeneration. Background technique [0002] Lignocellulose is the most abundant and cheap renewable resource on earth. my country is a large agricultural country with rich lignocellulose resources, and the annual output of crop straw alone reaches 700 million tons. However, the utilization rate of straw is low, and more than 30% is discarded or burned, which not only causes waste of resources, but also produces serious pollution. In recent years, with the reduction of non-renewable fossil fuel resources such as coal and petroleum, and the aggravation of environmental problems, the efficient utilization of straw resources has attracted more and more attention. [0003] The main components of straw are cellulose, hemicellulose and lignin, and also contain a small amount of ash and solvent extracts. Hydrolyz...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C12P19/14
Inventor 陈新德齐高相熊莲王波张海荣黄超林晓清陈雪芳郭海军黎海龙
Owner GUANGZHOU INST OF ENERGY CONVERSION - CHINESE ACAD OF SCI
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