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Ozone, ultraviolet and nano silver coating-film combined sterilizing method for freezing-dried food preserving

A nano-silver and freeze-drying technology, which is applied in food preservation, meat/fish preservation with chemicals, meat/fish preservation with coating protection layer, etc., can solve the problem that it is difficult to control microorganisms within the safe range, and achieve Effects of suppression of recontamination, low production cost, and long storage period

Inactive Publication Date: 2010-06-23
NINGBO HAITONG FOOD SCI & TECH CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it is difficult to control microorganisms within a safe range by simply using nano-silver coating film. However, pretreatment of freeze-dried food raw materials with nano-silver can better control the growth of microorganisms in the process of freeze-dried food processing. The control of the number of microorganisms in the final food has a certain effect

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Embodiment 1: The sterilizing treatment of freeze-dried vegetable pieces by applying the method of combined sterilization of ozone, ultraviolet and nano-silver coating

[0027] The freeze-dried mixed vegetable pieces produced by a certain company are packaged in 5g, and the nano-silver coating film treatment process is added to the pretreatment process of the production, or the nano-silver solution is directly used when the vegetables are blanched. The concentration of nano-silver used in the production process is below 0.05ppm, generally 0.045ppm is used, soaked for 30 seconds, and stirred at the same time, so that all parts of the vegetable surface are stuck with nano-silver particles, and then the vegetables are taken out for subsequent freeze-drying process. The ozone sterilization experiment requires a complete finished product, a piece of soup without any adverse changes such as moisture absorption in the contents, and the contents are divided into two with sterili...

Embodiment 2

[0028]Example 2: The method of applying ozone, ultraviolet and nano-silver coating to sterilize the bacteria of freeze-dried sea cucumber

[0029] I bought frozen fresh sea cucumbers in a market in a city, thawed them with warm water, and then removed the intestines. Be careful not to scratch the intestines of sea cucumbers, wash them with tap water, soak them in 0.045ppm nano-silver solution for 30 seconds, take them out and dry them, then A freeze-drying process was performed. The ozone sterilization experiment requires a complete finished product, a piece of sea cucumber that has not undergone any adverse changes, divided into two with sterilized scissors, and put them into the first-time used 9×13 seals that have been emptied of air as much as possible. In the bag, one is sealed in the air as a control sample; the other is sealed immediately after being filled with 3s of ozone gas. Then seal the outer side of the bag again and put a 18 * 24 sealing bag that has exhausted ...

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Abstract

The invention relates to a combined sterilization process of ozone, ultraviolet and nanometer silver paint films for assuring the quality of freeze-dried foods, belonging to the technical field of drying food safety control. The main processes of the combined sterilization comprise adopting nanometer silver as the raw material to pre-process the freeze-dried food, combining the sterilization method of finished products by ozone sterilization or ozone and other techniques, and controlling the microbiological content within 1000 micro-organisms / gram, coliform group bacteria (colibacillus) to reach the mark (negative). The invention adopts the mutually combined process of ozone, ultraviolet and nanometer silver, and also comprises a new process for subsequently removing residual ozone, whichnot only increases the ozone sterilization effect for leading sterilized products to control the microbiological content within the safe range, but also cannot damage the quality, the unique feature,the flavor, and the nutrition ingredients of the freeze-dried food.

Description

technical field [0001] The invention relates to a combined sterilization method for quality preservation of freeze-dried food by ozone, ultraviolet rays and nano-silver coating film, and the invention belongs to the technical field of dry food safety control. Background technique [0002] At present, the methods used to solve the problem of microorganisms exceeding the standard in freeze-dried food include: the latest method is pasteurization with continuous electric heating, but due to the expensive equipment, or the processing fee charged by the agent, the product’s quality is virtually increased. Cost: General freeze-dried food production units use simple ozone sterilization, and the phenomenon of E. coli exceeding the standard will still appear in the sterilized products. [0003] Due to the low cost of ozone sterilization, no toxic and side effects, and no loss to the flavor and nutritional content of the product, it is currently the most commonly used sterilization met...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A23L3/00A23L3/358A23L3/3445A23L3/005A23L3/44
CPCA23V2002/00A23B7/144A23B4/10A23B4/015A23L3/28A23B4/16A23B7/16A23B7/015
Inventor 张慜孙金才赵家丽王维琴李新林陈龙海张卫明
Owner NINGBO HAITONG FOOD SCI & TECH CO LTD
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