Application of wheat straw hemicellulose

A technology of hemicellulose and wheat straw, which is applied in the fields of application, food ingredients as taste improvers, food science, etc., can solve the problems of high concentration of organic matter, serious environmental pollution, difficult separation of waste liquid, etc., and achieve large production capacity , low cost, wide range of effects

Inactive Publication Date: 2019-02-26
QILU UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, high-concentration alkali pretreatment consumes a lot of energy and produces a large amount of waste liquid, which is difficult to separate. Its high concentration of organic matter is harmful to the environment and is not conducive to industrial applications.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] A method for purifying hemicellulose and producing polysaccharides by utilizing straw and biodegradation enzymes comprises the following steps:

[0037] (1) Straw pretreatment: remove impurities, wash and dry the straw, and then cut into sections to obtain a straw section of about 3 cm; put the straw in a cooking pot, add distilled water, and the mass ratio of straw to distilled water is 1:25. Add low-concentration alkali mixed solution for alkalization treatment, the temperature is 120°C, the reaction time is 120min, after the reaction, it is lowered to room temperature, and the solid and liquid are separated to obtain the remaining solid substance. The mixed lye used is a mixed solution of NaOH, natron, RO(CH2CH2O)nH, and H2O2, and the ratio of NaOH, natron, RO(CH2CH2O)nH, and H2O2 in the mixed lye is 50:20:2:25. Volume ratio. Wherein, NaOH mass concentration 6%. The mass concentration of Sodium Chlorine is 0.4%, the mass concentration of RO(CH2CH2O)nH is 30%, and t...

Embodiment 2

[0042]A method for purifying hemicellulose and producing polysaccharides by utilizing straw and biodegradation enzymes comprises the following steps:

[0043] (1) Straw pretreatment: remove impurities, wash and dry the straw, and then cut into sections to obtain a straw section of about 4 cm; put the straw in a cooking pot, add distilled water, and the mass ratio of straw to distilled water is 1:30. Add low-concentration alkali mixed solution for alkalization treatment, the temperature is 105°C, and the reaction time is 110min. After the reaction, the temperature was lowered to room temperature, and the solid and liquid were separated to obtain a solid substance A. The mixed lye used is a mixed solution of NaOH, natron, RO(CH2CH2O)nH, and H2O2, and the ratio of NaOH, natron, RO(CH2CH2O)nH, and H2O2 in the mixed lye is 50:20:2:25. Volume ratio. Wherein, NaOH mass concentration 7%. The mass concentration of Sodium Chlorine was 0.5%, the mass concentration of RO(CH2CH2O)nH was...

Embodiment 3

[0048] A method for purifying hemicellulose and producing polysaccharides by utilizing straw and biodegradation enzymes comprises the following steps:

[0049] (1) Straw pretreatment: remove impurities, wash and dry the straw, and cut it into sections to obtain a straw section of about 4 cm; put the straw in a cooking pot, add distilled water, and the mass ratio of straw to distilled water is 1:20; then add and mix The lye is subjected to alkalization reaction, the temperature is 115°C, and the reaction time is 100min. After the reaction, the temperature was lowered to room temperature, and the solid and liquid were separated to obtain a solid substance A. The mixed lye used is a mixed solution of NaOH, natron, RO(CH2CH2O)nH, and H2O2, and the ratio of NaOH, natron, RO(CH2CH2O)nH, and H2O2 in the mixed lye is 50:20:2:25. Volume ratio. Among them, the mass concentration of NaOH is 5%, the mass concentration of natronine is 0.5%, the mass concentration of RO(CH2CH2O)nH is 35%,...

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PUM

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Abstract

The invention provides a method for purifying hemicellulose and preparing xylose natural lignocellulose biomass as a raw material. The method comprises the following steps: firstly, taking natural lignocellulose as the raw material; secondly, dissolving the natural lignocellulose and degrading part of lignin by using multiple alkaline reagents; thirdly, degrading lignin components by taking extracellular enzyme (ligninolytic enzymes) secreted by fungal biological cells as a main enzyme preparation; fourthly, dissolving hemicellulose components in the natural lignocellulose by taking specific hemicellulolytic enzymes (xylanase) as an enzyme preparation and separating to obtain mixed solution components of xylose and the like. Various components in wheat straws can be effectively utilized byusing the method; the method has the advantages of simple process flow, greenness and environment friendliness, economy and energy conservation; and the prepared xylose can be deeply utilized in thefields of life and chemical industry after being further purified and separated.

Description

technical field [0001] The invention relates to resource utilization of biomass solid waste, in particular to a research method for enzymatically treating lignocellulose to extract hemicellulose and saccharification. Background technique [0002] So far, the world's annual output of wheat is about 700 million tons, and the remaining straw is directly burned or crushed and returned to the field, which not only causes environmental pollution, but also wastes organic raw material resources. The main chemical components of wheat straw are cellulose, hemicellulose, lignin, crude protein, and small molecular carbohydrates. [0003] Hemicellulose is one of the main chemical components in wheat straw. The total amount of hemicellulose accounts for 1 / 4 to 1 / 3 of the straw fiber. Although the hemicellulose content accounts for a high proportion of the total, its industrial application is limited due to the complexity of its structure. Since hemicellulose is a renewable resource, how...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C12P19/14C12P19/04C12P19/02A23L27/30
CPCA23L27/33A23V2002/00C12P19/02C12P19/04C12P19/14C12P2201/00C12P2203/00A23V2200/16A23V2250/638
Inventor 臧立华姬丹丹原琳慈玉辉
Owner QILU UNIV OF TECH
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