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Grape juice treating method before processing

A grape juice and grape technology, applied in application, food preparation, food science and other directions, can solve the problems of loss of nutrients, darkening of pigment, deterioration of flavor, etc., and achieve the effect of increasing molecular kinetic energy, low processing temperature and reducing oxidative loss

Inactive Publication Date: 2009-12-23
内江学农泰科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, polyphenols are a class of substances that are very sensitive to heat and oxygen. Long-term high-temperature treatment can easily cause polyphenols to be destroyed by heat and oxygen, resulting in darkening of pigments, browning, and deterioration of flavor. Nutrient Loss

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] a. Choose the dark fresh grape variety Rose Fragrance as the raw material, spray and clean with clean water, soak and clean in the water under ultrasonic vibration for 3 minutes, spray and clean with clean water, and drain the water;

[0027] b. Use a grape de-stemming crusher to de-stem the grapes cleaned in step a, and use a low-speed crusher to crush them to make a grape slurry containing grape skins and seeds. While crushing, add 0.01% ascorbic acid for color protection. Do not break the grape seeds when crushing, to avoid the dissolution of oil and other substances in the seeds, which will affect the flavor of grape juice;

[0028] c. Put the grape slurry in step b into a vacuum degassing tank, and degas at 10kPa for 5 minutes. During the degassing process, the grape slurry is stirred, and the speed of the stirrer is 30r / min;

[0029] d. Send step c grape pulp into a microwave treatment tank, perform microwave treatment and stir at the same time, the microwave frequenc...

Embodiment 2

[0032] a. Choose the dark fresh grape variety Cabernet Sauvignon as the raw material, spray and clean with clean water, soak and clean in the water for 0.5min under ultrasonic vibration, spray clean with clean water, and drain the water;

[0033] b. Destemmed and crushed the grapes cleaned in step a with a grape destemming crusher to prepare a grape slurry containing grape skins and grains. While crushing, add 0.05% ascorbic acid for color protection, and it cannot be crushed during crushing. Grape seeds, to avoid the dissolution of oil and other substances in the seeds, which will affect the flavor of grape juice;

[0034] c. Send the grape slurry in step b into a vacuum degassing tank, and degas at 50kPa for 15 minutes. During the degassing, the grape slurry is stirred, and the speed of the stirrer is 90r / min;

[0035] d. Send step c grape pulp into a microwave treatment tank, perform microwave treatment and stir at the same time, the microwave frequency is 2450MHZ, the power is...

Embodiment 3

[0038] a. Choose Cabernet Sauvignon and Hetian red grapes as raw materials, spray and clean with clean water, soak and clean in water under ultrasonic vibration for 1 min, spray and clean with clean water, and drain the water;

[0039] b. Use a grape de-stemming crusher to de-stem and crush the cleaned grapes in step a to prepare a grape slurry containing grape skins and grains. While crushing, add 0.1% ascorbic acid to protect the color, and it cannot be crushed. Grape seeds, to avoid the dissolution of oil and other substances in the seeds, which will affect the flavor of grape juice;

[0040] c. Send the grape slurry in step b into a vacuum degassing tank, and degas at 80kPa for 20 minutes. During the degassing process, the grape slurry is stirred, and the speed of the stirrer is 120r / min;

[0041] d. Send step c grape pulp into a microwave treatment tank, perform microwave treatment and stir at the same time, the microwave frequency is 2450MHZ, the power is 50kw, the treatment...

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Abstract

The invention relates to grape juice treating method before processing. The method comprises the steps that fresh grape is washed and crushed, to be prepared into grape paste with grape skin and seed, and the grape paste is conveyed into microwave field to be processed through microwave radiation, so as to promote components, such as polyphenols and the like, in the grape skin and seed to be rapidly dissolved in grape juice; and subsequent processing, such as juice expressing and the like, is performed according to a conventional method, and then the grape juice product contains rich polyphenols can be produced. As the microwave processing temperature is low and the time is short, the adverse effect during the conventional heating processing is avoided, the loss of the color, the flavor and the nutrient components of the grape juice are furthest reduced, the contents of the functional components, such as polyphenols, in the grape juice are effectively increased, and the microwave processing can also effectively kill microorganism and enzyme; and the method has the advantages that the efficiency is high, the method is energy-saving, and industrialized production is easy to be realized.

Description

Technical field [0001] The invention relates to a method for processing fresh grape juice before processing, in particular to a method for processing grape juice for dark red grape varieties. Background technique [0002] Grapes are the fruit of Vitis Vinifera L., a plant belonging to the grape family Vitis, which is the most productive fruit in the world. Grapes are not only beautiful in flavor, but also one of the most popular fruits, especially rich in nutrients. Mature grapes generally contain 15%-25% glucose and fructose, 0.5%-1.5% malic acid, tartaric acid and a small amount of Citric acid, etc., 0.15%-0.9% protein and abundant inorganic salts such as potassium, calcium, sodium, phosphorus, and manganese. [0003] Xinjiang is the earliest place where grapes were cultivated in my country. It has a history of viticulture for more than two thousand years. Xinjiang is located in the hinterland of Europe and Asia. It has a typical continental climate, with long sunshine hours, l...

Claims

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Application Information

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IPC IPC(8): A23L2/02A23L2/04A23L2/70A23L2/50A23L1/212A23L1/29A23L19/00A23L33/00
Inventor 冯作山黄文书叶新红热合满·艾拉杨海燕
Owner 内江学农泰科技有限公司
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