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Method for extracting xylooligosaccharides, lignin and glucose from walnut shell

A technology of xylooligosaccharides and walnut shells, which is applied in the field of food processing, can solve the problems of not fully utilizing walnut shells, etc., and achieve the effects of high added value, increased income, and avoiding waste

Active Publication Date: 2017-08-04
陕西兆信生物科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method can extract chitosan from walnut shell, but still fails to make full use of walnut shell

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] A kind of method utilizing walnut shell to prepare xylo-oligosaccharide and lignin, concrete steps are as follows:

[0033] S01, using a hammer mill to pulverize walnut shells through a 40-mesh sieve to obtain 40-mesh walnut shell powder;

[0034] S02, then add acidic electrolyzed water with a pH of 2.5 according to a solid-to-liquid ratio of 1:10, cook at 85°C for 30 minutes, filter and remove the cooking liquid, and obtain cooked walnut shell powder; the preparation method of the acidic electrolyzed water is: electrolyze in two chambers In the tank, the electrode is a titanium mesh electrode, add dilute NaCl solution, and conduct direct current (voltage 15-16V) for electrolysis until pH = 2.5;

[0035] S03, pack the walnut shell powder after cooking in the blasting reactor, inject water vapor to 2.0MPa, and blast instantly after the heat preservation for 90s;

[0036] S04, after blasting, the reaction liquid is enzymolyzed by 100 enzyme activity units / g xylanase, and...

Embodiment 2

[0042] A kind of method utilizing walnut shell to prepare xylo-oligosaccharide and lignin, concrete steps are as follows:

[0043] S01, using a hammer mill to pulverize walnut shells through a 60-mesh sieve to obtain 60-mesh walnut shell powder;

[0044] S02, then add acidic electrolyzed water with a pH of 2.0 according to a solid-to-liquid ratio of 1:15, cook at 85°C for 60 minutes, filter and remove the cooking liquid, and obtain cooked walnut shell powder; the preparation method of the acidic electrolyzed water is: electrolyze in two chambers In the tank, the electrode is a titanium mesh electrode, add dilute NaCl solution, and conduct direct current (voltage 15-16V) for electrolysis until pH = 2.0;

[0045] S03, put the walnut shell powder after cooking in the blasting reactor, inject water vapor to 2.0MPa, and blast instantly after the heat preservation for 120s;

[0046] S04, the reaction solution after blasting is enzymolyzed by 150 enzyme activity units / g xylanase, th...

Embodiment 3

[0049] A kind of method utilizing walnut shell to prepare xylo-oligosaccharide and lignin, concrete steps are as follows:

[0050] S01, using a hammer mill to pulverize walnut shells through a 20-mesh sieve to obtain 20-mesh walnut shell powder;

[0051] S02, then add acidic electrolyzed water with a pH of 4.5 according to a solid-to-liquid ratio of 1:30, cook at 60°C for 120 minutes, filter and remove the cooking liquid, and obtain cooked walnut shell powder; the preparation method of the acidic electrolyzed water is: electrolyze in two chambers In the tank, the electrode is a titanium mesh electrode, add dilute NaCl solution, and conduct electrolysis with direct current (voltage 15-16V) until pH = 4.5;

[0052] S03, pack the walnut shell powder after cooking in the blasting reaction kettle, inject water vapor to 3.0MPa, and blast instantly after the heat preservation for 30s;

[0053] S04, after the blasting, the reaction liquid was enzymolyzed by 500 enzyme activity units / ...

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Abstract

The invention discloses a method for extracting xylooligosaccharides, lignin and glucose from walnut shell; the method comprises the specific steps of crushing walnut shell to obtain walnut shell powder; adding the walnut shell powder into acidic electrolyzed water for cooking, and filtering to remove cooking liquor to obtain cooked walnut shell powder; charging the cooked walnut shell powder into a steam blasting device, introducing steam until a certain pressure is reached, holding the pressure for a period of time, and allowing instant blasting; adding xylanase to allow enzymatic hydrolysis, and separating residue and liquid after enzymatic hydrolysis to obtain enzymatic liquid and residue, wherein the enzymatic liquid incudes walnut shell hemicellulose limiting degradation products, xylooligosaccharides and xylose; adding alkaline electrolyzed water into the residue, cooking, dissolving to obtain residual lignin, and adding cellulase into the residue to perform enzymatic hydrolysis to obtain glucose. The method can produce products of high added value, xylooligosaccharides yield is > / =80%, lignin dissolution rate is > / =75%, and final glucose yield is > / =85%; solid waste is effectively treated and turned into wealth.

Description

technical field [0001] The invention relates to the technical field of food processing, in particular to a method for extracting xylooligosaccharides, lignin and glucose from walnut shells. Background technique [0002] Walnut is one of the four famous dried fruits in the world. It has good nutritional value and brain-invigorating effect, and is known as "longevity fruit". Walnut shells are the waste after walnut kernels are extracted. Due to the emergence of walnut deep processing technology, such as processing walnut kernels into beverages and using walnut kernels to extract oil, etc. This will inevitably lead to a large amount of walnut shell waste. At present, the utilization rate of these walnut shell waste is extremely low. Great pollution. [0003] The main components of walnut shells are lignin, cellulose and hemicellulose, wherein the content of hemicellulose and cellulose is about 20%, and the acid-insoluble lignin is about 50%. [0004] In the existing literatu...

Claims

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Application Information

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IPC IPC(8): C12P19/02C12P19/04C12P19/14
CPCC12P19/02C12P19/04C12P19/14
Inventor 孙君社裴海生
Owner 陕西兆信生物科技有限公司
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