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Preparation method of jujube fruit residue dietary fiber

A technology of dietary fiber and jujube dregs, which is applied in food preparation, food drying, food science, etc., can solve problems such as energy consumption, complicated process, and complex process, and achieve the effects of reducing energy consumption, reducing discharge pressure, and increasing added value

Inactive Publication Date: 2014-07-09
JIANGNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the techniques for preparing dietary fiber from jujube dregs include enzymatic method and enzyme-alkali method. These methods all use the pretreatment of drying jujube dregs first, and then diluting them into a suspension, which consumes energy and makes the process complicated; using multi-enzyme Composite treatment is carried out step by step, the process is complicated, the soluble cellulose content of the final product is not high, or it is treated together with alkali, although the content of soluble fiber is theoretically increased, the treatment solution cannot directly make edible meals fiber

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Extract the remaining wet jujube dregs from jujube with water, and circulate them with a high-shear wet micronizer for 4 minutes to form a jujube dregs paste, and then release the jujube dregs paste with water to form a mixture with a solid content of 10% (mass percentage). Suspension: Based on the mass of the suspension, add 1% cellulase and 1% xylanase, enzymatically hydrolyze for 70 minutes at 45°C and pH 4.0-6.0, and then inactivate the enzyme at 95°C for 5 minutes; The enzymolysis solution after deactivation is vacuum concentrated at 70°C to a soluble solid content of 30%; the above concentrated solution is subjected to centrifugal spray drying at 190°C inlet air temperature to obtain jujube dregs dietary fiber powder.

[0018] After the implementation of this embodiment, the obtained jujube dregs dietary fiber powder was analyzed, wherein the content of soluble fiber was 12.1%, and the ratio of soluble fiber to insoluble fiber was 5:16.

Embodiment 2

[0020] Extract the remaining wet jujube dregs from jujube juice with water, and use a high-shear wet micronizer to circulate for 2 minutes to form a jujube dregs paste, and then release the jujube dregs paste with water to form a paste with a solid content of 20% (mass percentage). Suspension: Based on the mass of the suspension, add 2% cellulase and 2% xylanase, enzymatically hydrolyze for 70 minutes at 60°C and pH 4.0-6.0, and then inactivate the enzyme at 90°C for 10 minutes; The enzymolyzed solution after deactivation is vacuum concentrated at 60°C to a solid content of 35%; the concentrated solution is centrifugally spray-dried at 200°C with air inlet temperature to obtain jujube dregs dietary fiber powder.

[0021] After the implementation of this example, the obtained jujube dregs dietary fiber powder was analyzed, wherein the content of soluble fiber was 11.9%, and the ratio of soluble fiber to insoluble fiber was 3:10.

Embodiment 3

[0023] Extract the remaining wet jujube dregs from the jujube juice with water, and use a high-shear wet micro-powder machine to circulate for 3 minutes to form a jujube dregs paste, and then release the jujube dregs paste with water to form a mixture with a solid content of 15% (mass percentage). Suspension: Based on the mass of the suspension, add 1.5% cellulase and 1.5% xylanase, enzymatically hydrolyze for 60 minutes at 50°C and pH 4.0-6.0, and then inactivate the enzyme at 90°C for 10 minutes; The enzymolyzed solution after deactivation is vacuum concentrated at 65°C to a solid content of 35%; the concentrated solution is centrifugally spray-dried at 195°C with air inlet temperature to obtain jujube dregs dietary fiber powder.

[0024] After the implementation of this example, the obtained jujube dregs dietary fiber powder was analyzed, wherein the content of soluble fiber was 13.0%, and the ratio of soluble fiber to insoluble fiber was 4:15.

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PUM

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Abstract

The invention discloses a preparation method of jujube fruit residue dietary fiber. The jujube fruit residue dietary fiber is prepared by adopting jujube fruit residues after red dates are juiced as raw materials, micro-grinding the raw materials through a high shear wet method, adding cellulase and xylanase for composite enzymatic hydrolysis, concentrating and drying the product. The invention provides a recycling method of jujube fruit residues as a by-product during the processing of red dates; by adopting the method, not only is the additional value of red dates improved, but also the discharge pressure of the jujube fruit residues to the environment is reduced.

Description

technical field [0001] The invention belongs to the field of food industry application technology, and in particular relates to a method for preparing jujube dregs dietary fiber by using wet micro-grinding technology and enzyme engineering technology. Background technique [0002] Jujube (Zizyphus jujube Dates), also known as Chinese jujube, red jujube and rubber jujube, is the fruit of Zizyphus jujube Mill, a plant of the genus Jujube in the family Rhamnaceae. my country is the largest jujube producing country, and its output accounts for more than 95% of the world's total output. At present, red dates are mostly sold and consumed in the form of whole dried fruits, but red dates are also processed into jujube juice, jujube wine, candied fruit, etc. The processing of products such as jujube juice will produce jujube dregs that account for more than 80% of the solid matter of the raw materials. These jujube dregs are rich in cellulose, so people's interest in using them to ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A23L1/308
CPCA23L33/22A23V2002/00A23V2300/10
Inventor 许学勤赵梅姜启兴许艳顺于沛沛夏文水
Owner JIANGNAN UNIV
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