Ultrahigh-pressure cold-sterilized cow milk and production method thereof

A production method and ultra-high pressure technology, applied in the field of milk production, can solve the problem of not being able to completely kill pathogenic bacteria, and achieve the effect of retaining fresh flavor and nutritional value

Inactive Publication Date: 2020-08-18
BRIGHT DAIRY & FOOD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is to overcome the limitation that ultra-high pressure cold sterilization cannot completely kill some pathogenic bacteria, and provide a production method of ultra-high pressure sterilized milk with practical application value

Method used

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  • Ultrahigh-pressure cold-sterilized cow milk and production method thereof
  • Ultrahigh-pressure cold-sterilized cow milk and production method thereof
  • Ultrahigh-pressure cold-sterilized cow milk and production method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Select raw milk that meets the requirements of milk source quality as the source of raw materials. The indicators of raw milk are that the total number of colonies is 5,000 CFU / mL, the number of somatic cells is 200,000 / mL, and coliforms, Staphylococcus aureus, and Salmonella are not allowed to be detected in every 25 mL. out. Furthermore, fixed pastures with mature and advanced management levels, excellent and relatively stable quality of milk produced in the past year can be selected as the source of raw milk. The raw milk was immediately cooled to 2°C for refrigerated storage, and within 4 hours of collection, it was filled into elastic plastic bottles with aseptic filling equipment in a clean environment. After filling, the residual air in the bottle was 1%. The filled raw milk is stored at 2-6°C.

[0027] Within 12 hours after filling, the filled raw milk was sterilized under 500MPa for 20 minutes by ultra-high pressure treatment. The medium for the ultra-high p...

Embodiment 2

[0030] Select raw milk that meets the requirements of milk source quality as the source of raw materials. The indicators of raw milk are that the total number of colonies is 2,000 CFU / mL, the number of somatic cells is 150,000 / mL, and coliforms, Staphylococcus aureus, and Salmonella are not allowed to be detected in every 25 mL. out. Furthermore, fixed pastures with mature and advanced management levels, excellent and relatively stable quality of milk produced in the past year can be selected as the source of raw milk. The raw milk was immediately cooled to 6°C for refrigerated storage, and within 6 hours of collection, it was filled into elastic plastic bottles with aseptic filling equipment in a clean environment. After filling, the residual air in the bottle was 0.5%. The filled raw milk is stored at 2-6°C.

[0031] Within 6 hours after filling, the filled raw milk was sterilized under 600MPa for 5 minutes by ultra-high pressure treatment. The medium for the ultra-high p...

Embodiment 3

[0034] Select raw milk that meets the requirements of milk source quality as the source of raw materials. The indicators of raw milk are that the total number of colonies is 1000CFU / mL, the number of somatic cells is 150000 / mL, and coliforms, Staphylococcus aureus, and Salmonella are not allowed to be detected in every 25mL. out. Furthermore, fixed pastures with mature and advanced management levels, excellent and relatively stable quality of milk produced in the past year can be selected as the source of raw milk. The raw milk was immediately cooled to 4°C for refrigerated storage, and within 3 hours of collection, it was filled into elastic plastic bags with aseptic filling equipment in a clean environment. After filling, the residual air in the bags was 0. The filled raw milk is stored at 2-6°C.

[0035] Within 8 hours after filling, the filled raw milk was sterilized at 550MPa for 10 minutes by ultra-high pressure treatment. The medium for the ultra-high pressure treatm...

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Abstract

The invention discloses a production method of ultrahigh-pressure cold-sterilized cow milk, which sequentially comprises the following steps: (1) detecting raw cow milk, and filling the raw cow milk which is detected to be qualified within 6 hours after collection to obtain packaged cow milk; (2) performing ultrahigh-pressure treatment on the packaged cow milk obtained in the step (1) to obtain sterilized cow milk; and (3) refrigerating and storing the sterilized milk obtained in the step (2) at 2-6 DEG C, and transporting and selling the sterilized milk at 2-6 DEG C, wherein the detection standards in the step (1) are as follows: the total number of bacterial colonies is less than or equal to 5000CFU/mL, the number of somatic cells is less than or equal to 200000/mL, and escherichia coli,staphylococcus aureus and salmonella cannot be detected every 25mL. The invention also discloses the ultrahigh-pressure cold sterilization cow milk prepared by the method. According to the invention,the raw milk is sterilized by adopting ultrahigh-pressure cold sterilization, and through reasonable raw material control and process design, the fresh flavor and nutritional value of the milk are reserved to the greatest extent on the premise of ensuring food safety.

Description

technical field [0001] The invention belongs to the field of milk production, in particular to ultra-high pressure cold sterilized milk and a production method thereof. Background technique [0002] Ultra-high pressure sterilization technology is a new type of food sterilization method created and developed in the 1980s in the world. Food ultra-high pressure sterilization, in theory, is to seal the food material in an elastic material or place it in a sterile pressure system, often using water or other fluid media as the medium for transmitting pressure, and acting under a pressure of 100MPa-1000MPa for a period of time to achieve sterilization The effect of microorganisms in dead food. The basic principle is to use extremely high static pressure to destroy the cell wall and cell membrane of bacteria, inhibit the activity of enzymes and the replication of genetic materials such as DNA, and destroy the combination of protein hydrogen bonds, disulfide bonds and ionic bonds, a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A23C3/04A23C3/00
CPCA23C3/04A23C3/00
Inventor 肖杨刘振民徐致远苏米亚于鹏
Owner BRIGHT DAIRY & FOOD
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