Frozen concentrated processing method for litchi juice

A freeze-concentration and processing method technology, applied in the fields of application, food preparation, food science, etc., can solve the problems such as discoloration and taste of lychee juice, achieve the effect of maintaining color and avoiding adverse effects

Inactive Publication Date: 2013-03-13
ZHONGKAI UNIV OF AGRI & ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to overcome the shortcomings of existing fruit juice concentration processing technology that easily causes litchi juice to chan

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0020] Use tap water cleaning combined with high-temperature steam treatment to disinfect and sterilize equipment such as crushing separators, beating centrifuges, filters, freeze concentrators, aseptic filling machines, and utensils for containing fruit juices. The concentration of ozone in water is 0.1~0.3 Ppm ozone water is used to immerse and sterilize fresh, intact, and pest-free litchi fruits for 1-2 minutes. The litchi fruits are shelled and cored with a crushing separator, and the litchi pulp is input into a beating centrifuge to obtain raw litchi juice. The freeze concentrator freezes and concentrates the raw lychee juice at 0°C~-35°C, then aseptically fills it, and preserves the filled and sealed lychee frozen concentrate juice at a low temperature of -18°C~-20°C.

example 2

[0022] Use tap water cleaning combined with high-temperature steam treatment to disinfect and sterilize equipment such as crushing separators, beating centrifuges, filters, freeze concentrators, aseptic filling machines, and utensils for containing fruit juices. The concentration of ozone in water is 0.1~0.3 Ppm ozone water is used to immerse, disinfect and sterilize fresh, intact, and pest-free litchi fruits for 1-2 minutes. The litchi fruits are shelled and cored with a crushing separator, and the litchi pulp is input into a screw press machine to obtain raw litchi juice. The freeze concentrator freezes and concentrates the raw lychee juice at 0°C~-35°C, then aseptically fills it, and preserves the filled and sealed lychee frozen concentrate juice at a low temperature of -18°C~-20°C.

example 3

[0024] Use tap water cleaning combined with high-temperature steam treatment to disinfect and sterilize equipment such as crushing separators, beating centrifuges, filters, freeze concentrators, aseptic filling machines, and utensils for containing fruit juices. The concentration of ozone in water is 0.1~0.3 Ppm ozone water soaks and sterilizes fresh, intact and pest-free lychees for 1-2 minutes, shells and cores the lychees with a crushing separator, and puts the lychees pulp into the beating centrifuge for the first beating and extraction Juice, and then the remaining lychee pulp separated from the beating centrifuge is input into the screw press for the second juice extraction, and then the raw lychee juice is frozen and concentrated at 0 ° C ~ -35 ° C by using a freeze concentrator. Bacteria filling for filling and sealing, and the frozen lychee concentrated juice that has been filled and sealed is stored at a low temperature of -18°C to -20°C.

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Abstract

The invention discloses a frozen concentrated processing method for litchi juice. The method disclosed by the invention is implemented through carrying out ozone treatment, shelling and seed removal, juicing, filtering, frozen concentrated treatment and aseptic filling and sealing on litchi fruits, and storing frozen concentrated litchi juice subjected to filling and sealing at lower temperature. According to the frozen concentrated processing method provided by the invention, the concentration of soluble solids of litchi juice can be increased from about 17% to more than 25%; in addition, because litchi fruits before being juiced are subjected to sterilization by using ozone water, litchi juice before being concentrated is not required to be subjected to heated sterilization treatment, thereby avoiding the adverse effects of high temperature on the litchi juice; and the obtained concentrated litchi juice basically keeps the original color, flavor, aroma and nutrients of the original litchi juice.

Description

technical field [0001] The invention relates to the technical field of fruit juice processing, in particular to a freeze-concentration processing method of lychee juice. Background technique [0002] China is the largest producer of lychees, and fresh lychees produced in China are extremely popular in domestic and foreign markets. However, due to the strong seasonality of litchi fruit harvesting, lagging fresh-keeping technology, and small-scale fresh fruit export, the rot loss of litchi fruit that cannot be sold fresh every year is as high as 20% to 30%, seriously hurting the interests of fruit farmers. On the other hand, although domestic and foreign markets have a strong demand for concentrated lychee juice, due to the backward processing technology of lychee juice, the existing domestic concentrated juice processing technology - vacuum evaporation and concentration technology, due to the high evaporation and concentration temperature (40 ℃ ~60℃), it is easy to cause the...

Claims

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Application Information

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IPC IPC(8): A23L2/02A23L1/015A23L2/12A23L5/20
Inventor 赖健李艳敏王迎司徒满泉
Owner ZHONGKAI UNIV OF AGRI & ENG
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