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Enzymatic method for removing seed coats of walnut kernels in combination with infrared drying

An infrared drying and walnut kernel technology, which is applied in the fields of shelling, pod removal, food science, etc., can solve the problems that the peeling effect of the compound enzymolysis solution is not optimal, affects the number of uses, and is difficult to reuse. The effect of peeling time, increasing the number of uses, prolonging the duration

Active Publication Date: 2019-02-12
保康慈文核桃科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the large amount of protein contained in walnut kernels, there is a large difference in the attachment mode between the seed coat and walnut kernels and mangoes, and pectinase is not needed when peeling; The optimal reaction conditions are different, and papain also has a certain hydrolysis effect on other enzymes, resulting in the peeling effect of its compound enzymatic solution not reaching the best; in addition, the enzymatic activity of this compound enzyme decays quickly. It is difficult to reuse after the first use, and papain will also continue to hydrolyze other enzymes, resulting in rapid decay of enzyme activity and affecting the number of uses

Method used

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  • Enzymatic method for removing seed coats of walnut kernels in combination with infrared drying
  • Enzymatic method for removing seed coats of walnut kernels in combination with infrared drying

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] The enzymatic method of the present embodiment is combined with infrared drying to remove the method for walnut kernel seed coat, adopts the following steps:

[0031] S1. Wash the walnut kernels with seed coats, remove impurities and mildew, and set aside;

[0032] S2. Add the walnut kernels obtained in step S1 to the immobilized cellulase solution, adjust the pH value to 4.5, and make the enzyme activity of the immobilized cellulase 50000U / g, heat it at 45°C for 3 hours, filter and set aside ;

[0033] S3. Add the walnut kernels obtained in step S2 to the protease solution, adjust the pH value to 6.5, and make the protease activity 100000U / g, heat-preserve and enzymolyze at 60°C for 5 hours, filter and set aside;

[0034] S4, remove the walnut kernels obtained in step S3 and perform ultrasonic rinsing, the rinsing temperature is 65°C, the ultrasonic frequency is 30kHz, filter the skin and drain the surface moisture of the walnut kernels;

[0035] S5. Put the walnut k...

Embodiment 2

[0038] The enzymatic method of the present embodiment is combined with infrared drying to remove the method for walnut kernel seed coat, adopts the following steps:

[0039] S1. Wash the walnut kernels with seed coats, remove impurities and mildew, and set aside;

[0040] S2. Add the walnut kernels obtained in step S1 to the immobilized cellulase solution, adjust the pH value to 4.5, and make the enzyme activity of the immobilized cellulase 50,000 U / g, keep the enzymolysis at 40°C for 3 hours, filter and set aside ;

[0041] S3. Add the walnut kernels obtained in step S2 to the protease solution, adjust the pH value to 6.5, and make the protease activity 100000U / g, keep it at 55°C for 5 hours, filter and set aside;

[0042] S4, remove the walnut kernels obtained in step S3 and perform ultrasonic rinsing, the rinsing temperature is 65°C, the ultrasonic frequency is 30kHz, filter the skin and drain the surface moisture of the walnut kernels;

[0043] S5. Put the walnut kernel ...

Embodiment 3

[0046] The enzymatic method of the present embodiment is combined with infrared drying to remove the method for walnut kernel seed coat, adopts the following steps:

[0047] S1. Wash, remove impurities, and remove mildew from the walnut kernels with seed coats, and set aside;

[0048] S2. Add the walnut kernels obtained in step S1 to the immobilized cellulase, adjust the pH value to 4.5, and make the enzyme activity of the immobilized cellulase 50000U / g, heat the enzymolysis at 50°C for 3 hours, filter and set aside;

[0049] S3. Add the walnut kernels obtained in step S2 to the protease solution, adjust the pH value to 6.5, and make the protease activity 100000U / g, heat the enzymolysis at 65°C for 5 hours, filter and set aside;

[0050] S4, remove the walnut kernels obtained in step S3 and perform ultrasonic rinsing, the rinsing temperature is 65°C, the ultrasonic frequency is 30kHz, filter the skin and drain the surface moisture of the walnut kernels;

[0051] S5. Put the w...

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Abstract

The invention discloses an enzymatic method for removing seed coats of walnut kernels in combination with infrared drying. The walnut kernels are added into immobilized cellulase for enzymatic hydrolysis and then filtered for use; the walnut kernels are added into a protease solution, the pH is adjusted, heat preservation and enzymatic hydrolysis are conducted at 55-65 DEG C, and then the solutionis filtered for use; the walnut kernels are fished out for ultrasonic rinsing, the epidermis is filtered, and the water is wiped out; then the walnut kernels are placed in a drying box for drying at50-65 DEG C until the moisture content is equal to or lower than 8%; finally, the walnut kernels are subjected to winnowing to obtain peeled walnut kernels. According to the provided method for removing the seed coats of the walnut kernels, the cellulase is prepared into an immobilized enzyme agent to react with the protease first and the walnut kernels later, so that mutual inhibition of the twoenzymes due to different reaction conditions is avoided, the hydrolysis efficiency of the enzymes is improved to the maximum degree, and the peeling time is shortened; by immobilizing the cellulase, the activity duration of the cellulase is prolonged, and the half-life period of the activity of the enzymes is prolonged.

Description

technical field [0001] The invention belongs to the field of primary food processing, in particular to a method for removing walnut seed coats by combining enzymatic method with infrared drying. Background technique [0002] The walnut kernel has a thin skin, which is the walnut seed coat. The main components of the walnut seed coat are cellulose, pectin, tannin, and pigments. During the processing and use of walnut kernels, this layer of seed coat not only affects the taste, quality and color of walnuts, but also affects the quality of walnuts. Protein stability, so it is necessary to remove the seed coat of walnut kernel during processing. Traditional peeling methods include manual peeling, boiling water peeling, baking peeling and lye peeling. The peeling efficiency of manual peeling method is low, and the peeling effect of boiling water peeling method and baking peeling method is not ideal; lye peeling method is a relatively important peeling method at present, but the...

Claims

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Application Information

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IPC IPC(8): A23N5/00
CPCA23N5/002
Inventor 刘传菊汤尚文豁银强肖添李欢欢聂荣祖于博吴进菊阎华
Owner 保康慈文核桃科技有限公司
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