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A method for sterilizing fruit juice

A fruit juice and alternate processing technology, applied in food heat treatment, food science, food freezing, etc., can solve the problems of cell mechanical damage, microbial death, slow killing effect, etc.

Active Publication Date: 2016-04-13
新疆丝凯食品研发中心(有限公司)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Freezing also forms ice crystals inside the microbial cells, which mechanically damages the cells and also leads to the death of the microorganisms
Therefore, freezing can inhibit or kill microorganisms. During the freezing process, as the temperature decreases, the survival rate of microorganisms decreases rapidly, but the killing effect of low temperature in freezing storage is relatively slow. If freezing and thawing are repeated alternately, it has a greater effect on the nutrients of bacteria. strong lethality

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] a. Pack and seal the pre-treated fresh apricot juice in a glass bottle (238ml), and freeze it in the freezer until the temperature is -25°C to make it into a frozen state;

[0027] b. Put the frozen bottled apricot juice of step a into a box-type microwave heater for microwave radiation treatment, the microwave power is 3kw, the microwave treatment time is 35min, the processing capacity is 30 bottles / time, and the temperature of the apricot juice in the glass bottle is 45°C ;

[0028] C, the microwave treatment apricot juice of step b is sent into freezer rapidly and freezes, repeats the freezing of step a and the microwave of step b to carry out alternate cycle treatment 3 times;

[0029] d. Cool the apricot juice that has been frozen and microwaved alternately in step c to a temperature of 0° C., and then store it in a conventional manner.

Embodiment 2

[0031] a. Put the grape juice that has been squeezed, filtered and clarified in a hot and cold cylinder, stir and freeze to a temperature of -10°C, so that the grape juice becomes an ice paste that is not completely frozen;

[0032] b. Pump the grape juice in step a into the polytetrafluoro coil (φ3.0cm) in the microwave heater. The flow velocity of the grape juice in the coil is 0.025m / s, the flow rate is 64L / h, and the microwave power is 10kw. The grape juice was subjected to microwave radiation treatment for 30 minutes while flowing, and the temperature of the grape juice flowing out of the microwave heater was 60°C.

[0033] c. Pump the thawed and heated grape juice in step b into the hot and cold cylinders for stirring and freezing, then repeat the freezing of step a and the microwave of step b to carry out alternate cycle treatment for 4 times;

[0034] d. Pump the grape juice that has been frozen and microwaved alternately in step c into a hot and cold cylinder to cool ...

Embodiment 3

[0036] a. Pack and seal the non-thermally processed concentrated melon juice in a PE plastic bottle (360ml), and freeze it in a tunnel-type freezing device to a temperature of -30°C to make it into a frozen state;

[0037] b. The melon juice in step a is sent to the tunnel-type box-type microwave heater through the conveyor belt, and the bottled melon juice is transported with the conveyor belt and completed the microwave radiation treatment. The microwave power is 30kw, the microwave treatment time is 15min, and the processing capacity is 360 bottle / h, the temperature of the melon juice in the PE plastic bottle is 35°C;

[0038] c. The microwave-treated melon juice in step b is transported to a tunnel freezer for freezing again, and then the freezing in step a and the microwave in step b are repeated for alternate cycle treatment for 2 times;

[0039] d. Send the muskmelon juice that has been frozen and alternately treated by microwaves in step c into a tunnel freezer to redu...

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Abstract

The invention relates to a method for juice sterilization treatment. The method comprises the steps of freezing all types of treated juice with sealed packages or non-packaged juice, performing microwave radiation treatment on the juice in a microwave oven at the controlled microwave treatment temperature of less than 75 DEG C, repeatedly performing freezing and microwave alternate treatment, and performing subsequent conventional processing or storage and transportation. By freezing and microwave alternate treatment, the activity of all types of enzymes in the juice can be effectively alleviated, and most microorganisms in the juice can be killed, so that a requirement on commercial sterilization can be met. The temperature of the microwave treatment is low, so that the original color, the flavor, the nutrition and the effect components of the juice can be well retained. The method disclosed by the invention is good in sterilization effect and can be used for producing high-quality juice products.

Description

technical field [0001] The invention relates to a method for sterilizing fruit juice, in particular to a method for repeatedly treating fruit juice alternately by freezing and microwaves. Background technique [0002] Juice is the fruit juice that is selected, cleaned and squeezed out of fresh fruits. It is rich in vitamins, minerals, carbohydrates and dietary fiber. It is the most nutritious part of the fruit. Fresh and refreshing, easy to be absorbed by the human body, it is close to fresh fruit in flavor and nutrition, known as "liquid fruit". Fruit juice is the main processing form and main consumption form of fruit in developed countries, and it is also the main trade variety of fruit processing products in the international market. With the improvement of people's living standards in our country year by year, people's dietary structure is gradually changing, and the demand for fruit juice drinks has increased significantly. At the same time, higher requirements have b...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A23L2/48A23L2/42
CPCA23L2/42A23L2/48A23V2002/00A23V2300/20A23V2300/24
Inventor 冯作山白羽嘉热合满·艾拉黄文书严雅慧刘峰娟段继华陶永霞
Owner 新疆丝凯食品研发中心(有限公司)
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