Pre-treating method for improving sugar conversion rate of lignocellulose

A technology of lignocellulose and lignocellulose, which is applied in the field of biomass resource conversion and utilization, can solve the problems of low conversion rate of enzymatic hydrolysis and cannot be satisfied, and achieve the effect of promoting enzymatic hydrolysis and simple and easy treatment process.

Inactive Publication Date: 2015-03-11
QILU UNIV OF TECH
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  • Summary
  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

[0007] However, when the above method is used in the pretreatment process of lignocellulose enzymatic hydrolysis, the enzymatic conversion rate is relatively low and cannot meet the relevant requirements.

Method used

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  • Pre-treating method for improving sugar conversion rate of lignocellulose
  • Pre-treating method for improving sugar conversion rate of lignocellulose

Examples

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Effect test

Embodiment 1

[0036] A pretreatment method for improving lignocellulose sugar conversion rate, the steps are as follows:

[0037] (1) remove the sundries in the corn stalks, then air-dry, pulverize and sieve the lignocellulose through a sieve with an aperture of 5 mm to obtain the cellulose raw material;

[0038] (2) Add the cellulose raw material to the NaOH solution, stir evenly, and then add H 2 o 2 Stir with the activator cyanamide evenly to obtain a mixed reaction solution, and the mixed reaction solution is stirred and reacted for 24 hours at 30° C. and at a shaker speed of 150 rpm to obtain pretreated lignocellulose;

[0039] In the mixed reaction solution, the amount of NaOH added is 0.15g·g -1 Lignocellulosic raw material, H 2 o 2 The dosage is 0.075g·g -1 For lignocellulosic raw materials, the final addition of cyanamide is 0.01g·g -1 Lignocellulosic raw material.

Embodiment 2

[0041] A pretreatment method for improving lignocellulose sugar conversion rate, the steps are as follows:

[0042] (1) remove the sundries in the bagasse, then air-dry, pulverize and sieve the lignocellulose through a sieve with an aperture of 5 mm to obtain the cellulose raw material;

[0043] (2) Add the cellulose raw material to the NaOH solution, stir evenly, and then add H 2 o 2 Stir with the activator cyanamide evenly to obtain a mixed reaction solution, and the mixed reaction solution is stirred and reacted for 24 hours at a stirring speed of 150 rpm at 30° C. to obtain pretreated lignocellulose;

[0044] In the mixed reaction solution, the amount of NaOH added is 0.15g·g -1 Lignocellulosic raw material, H 2 o 2 The dosage is 0.075g·g -1 For lignocellulosic raw materials, the final addition of cyanamide is 0.02g·g -1 Lignocellulosic raw material.

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Abstract

The invention relates to a pre-treating method for improving the sugar conversion rate of lignocellulose. The pre-treating method comprises the following steps: (1) removing impurities in a lignocellulose raw material, and carrying out air drying, smashing and sieving on the lignocellulose to prepare a cellulose raw material; (2) adding the cellulose raw material into a NaOH solution, uniformly stirring, then sequentially adding in H2O2 and cyanogen amine adopted as an activator, uniformly stirring again to prepare a mixed reaction liquid, and reacting by stirring to prepare the pre-treated lignocellulose. The pre-treating method adopts the method of combining low-concentration NaOH and H2O2 with the activator to treat the cellulose raw material, the pre-treating process is simple and feasible, intractable wastewater is prevented from generating, and the sugar conversion rate of the lignocellulose is remarkably improved.

Description

technical field [0001] The invention relates to a pretreatment method for improving the conversion rate of lignocellulose sugar, and belongs to the technical field of conversion and utilization of biomass resources. Background technique [0002] Lignocellulose is the most abundant and cheap renewable resource on earth, and it contains huge biomass energy. It mainly comes from agricultural waste, forest waste and urban waste. With the depletion of fossil fuels and the deterioration of the environment, the conversion of lignocellulosic sugars into glucose and xylose, etc., and further use in the production of bio-based chemicals such as fuel ethanol and other energy products has attracted increasing attention. my country is a large agricultural country with abundant crop straw resources, with an annual output of nearly 800 million tons. However, for a long time, most of the straws have been discarded or burned, which not only wastes resources but also pollutes the environment...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C12P19/14C12P19/02
Inventor 刘同军徐丽丽王燕马美范王艳杰
Owner QILU UNIV OF TECH
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