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Method for saccharifying wood fiber raw material through mechanical activation in cooperation with alkali solid phase reinforcement

A technology of lignocellulosic raw materials and mechanical activation, which is applied in fermentation and other directions, can solve the problems of poor mechanical activation effect and high energy consumption, and achieve the effects of promoting deep development and utilization, small reaction volume, and reducing ineffective adsorption

Inactive Publication Date: 2016-08-24
GUANGXI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage of mechanical activation is high energy consumption, and the effect of mechanical activation alone is not good

Method used

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  • Method for saccharifying wood fiber raw material through mechanical activation in cooperation with alkali solid phase reinforcement
  • Method for saccharifying wood fiber raw material through mechanical activation in cooperation with alkali solid phase reinforcement
  • Method for saccharifying wood fiber raw material through mechanical activation in cooperation with alkali solid phase reinforcement

Examples

Experimental program
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Effect test

Embodiment 1

[0025] A method for saccharifying lignocellulosic raw materials with mechanical activation and alkali solid phase reinforcement, comprising the steps of:

[0026] (1) Raw material pre-treatment: first remove impurities in the lignocellulosic raw material, dry to a water content of 5%; pulverize to 40 meshes to obtain a processed lignocellulosic raw material; the lignocellulosic raw material is bagasse;

[0027] (2) Mechanical activation treatment: put the pretreated lignocellulosic raw material and alkali in a ball mill, at a constant temperature of 20°C, with a rotation speed of 100rpm, and after ball milling for 30min, the balls are separated to obtain activated lignocellulose powder; alkali The consumption accounts for 1% of lignocellulosic raw material weight; Described alkali is sodium hydroxide;

[0028] (3) Lignin elution: put the activated lignocellulose powder into a cleaner, wash off the lignin and excess alkali with water, and obtain the eluted lignocellulose raw ma...

Embodiment 2

[0031] A method for saccharifying lignocellulosic raw materials with mechanical activation and alkali solid phase reinforcement, comprising the steps of:

[0032] (1) Raw material pre-treatment: first remove impurities in the lignocellulosic raw material, dry to a water content of 30%; pulverize to 100 mesh to obtain a processed lignocellulosic raw material; the lignocellulosic raw material is cassava distiller's grains;

[0033] (2) Mechanical activation treatment: put the pretreated lignocellulosic raw material and alkali in a ball mill, at a constant temperature of 80°C, with a rotating speed of 500rpm, and after ball milling for 90min, the balls are separated to obtain activated lignocellulose powder; alkali The consumption accounts for 20% of lignocellulosic raw material weight; Described alkali is calcium hydroxide;

[0034] (3) Lignin elution: put the activated lignocellulose powder into a cleaner, neutralize calcium hydroxide with acid, and then elute with water to obt...

Embodiment 3

[0037] A method for saccharifying lignocellulosic raw materials with mechanical activation and alkali solid phase reinforcement, comprising the steps of:

[0038] (1) Raw material pretreatment: first remove impurities in the lignocellulosic raw material, dry to a water content of 20%; pulverize to 80 mesh to obtain a processed lignocellulosic raw material; the lignocellulosic raw material is corn stalk;

[0039] (2) Mechanical activation treatment: put the pretreated lignocellulosic raw material and alkali in a ball mill, at a constant temperature of 40°C, with a rotating speed of 300rpm, and after ball milling for 60min, the balls are separated to obtain activated lignocellulose powder; alkali The consumption accounts for 10% of lignocellulosic raw material weight; Described alkali is potassium hydroxide;

[0040] (3) Lignin elution: put the activated lignocellulose powder into a cleaner, wash off the lignin and excess alkali with water, and obtain the eluted lignocellulose raw...

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Abstract

The invention belongs to the technical field of biomass energy, and particularly relates to a method for saccharifying a wood fiber raw material through mechanical activation in cooperation with alkali solid phase reinforcement. The method for saccharifying the wood fiber raw material through mechanical activation in cooperation with alkali solid phase reinforcement includes the following steps of raw material pretreatment, mechanical activation treatment, lignin elution and cellulose saccharification. By means of the method, the content of lignin can be reduced, the nature of lignin can be changed, and ineffective adsorption of lignin to cellulase can be reduced; the structure of wood fibers can be damaged, the crystallinity of cellulose can be reduced, and the chemical reactivity of wood fibers and the accessibility of enzymes to cellulose can be improved. The method has the advantages that high temperature and high pressure are not needed, enzymolysis time is short, energy consumption is low, corrosion to equipment is avoided, and substances harmful to the follow-up fermentation stage are not generated.

Description

technical field [0001] The invention belongs to the technical field of biomass energy, and in particular relates to a saccharification method for mechanical activation and alkali solid-phase strengthening of lignocellulosic raw materials. Background technique [0002] Fossil fuels have disadvantages such as non-renewability and environmental pollution caused by combustion. Bioethanol is an ideal substitute for fossil fuels. Lignocellulosic feedstock can be used for bioethanol production. However, because lignocellulosic raw materials are composed of cellulose, hemicellulose and lignin, with dense structure and high crystallinity, it is difficult for cellulose glucoamylase to act on unpretreated lignocellulosic raw materials. The production of bioethanol using lignocellulosic raw materials requires: reducing lignin content, changing lignin properties, destroying the dense structure of lignocellulosic fibers, reducing cellulose crystallinity, and increasing the accessibility ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C12P19/14
CPCC12P19/14C12P2201/00
Inventor 杨梅张燕娟黄祖强伍娟覃杏珍沈芳冯振飞黄爱民胡华宇覃宇奔
Owner GUANGXI UNIV
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