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Method for prolonging shelf life of milk

A technology of shelf life and milk, applied in the preservation of milk, dairy products, applications, etc., can solve problems such as extending the shelf life of milk

Active Publication Date: 2018-05-01
INNER MONGOLIA YILI INDUSTRIAL GROUP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are few literatures on prolonging the shelf life of milk from the perspective of technology combination

Method used

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  • Method for prolonging shelf life of milk
  • Method for prolonging shelf life of milk
  • Method for prolonging shelf life of milk

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] The raw milk at about 37°C just extruded from the pasture is rapidly cooled to 0°C within 1-2 minutes through a high-efficiency plate heat exchanger. The total number of raw milk bacteria is 100,000 CFU / ML, and then the raw milk is quickly stored in a sterile , airtight, airtight, and light-tight container (the volume of raw milk in the container should exceed 95% of the total volume), and then fill nitrogen in the aseptic, airtight, airtight, and light-proof container to ensure that the inside of the container The residual oxygen content is below 0.2v% and the pressure in the container is above 0.5MPa, then stored at 0°C for 120 hours, and the microbial indicators (total number of bacteria, psychrophilic bacteria, coliform group) and sensory indicators (fat floating, flavor) of raw milk are observed. , alcohol test, boiling test).

Embodiment 2

[0019] It is basically the same as Example 1, except that the raw milk at about 37°C just extruded from the pasture is rapidly cooled to 1°C within 1-2 minutes through a high-efficiency plate heat exchanger, and stored at a constant temperature of 1°C.

Embodiment 3

[0021] It is basically the same as Example 1, except that the raw milk just extruded from the pasture at about 37°C is rapidly cooled to 2°C within 1-2 minutes through a high-efficiency plate heat exchanger, and stored at a constant temperature of 2°C.

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Abstract

The invention provides a method for prolonging shelf life of milk. As for raw-material milk, the method for prolonging the shelf life of the milk comprises the following steps of rapidly lowering thetemperature of the raw-material milk to 0-2 DEG C after the raw-material milk is obtained from a pasture, and ensuring total bacterial count of the raw-material milk to be 100 thousand CFU / ML or below; and storing the raw-material milk at a constant temperature of 0-2 DEG C in an aseptic, airtight and dark container. As for pasteurized milk, the method comprises the following steps of sterilizingraw-material milk by performing pasteurization; rapidly lowering the temperature of the pasteurized milk to 0-2 DEG C, and ensuring total bacterial count of the pasteurized milk is 50 CFU / ML or below;and storing the pasteurized milk at a constant temperature of 0-2 DEG C in an aseptic, airtight and dark container. Breakthrough is brought to conventional technologies by the method for prolonging the shelf life of the milk. By adopting scientific combination technology, as well as specific storage and transportation conditions, the method is capable of realizing 120-hour preservation of raw-material milk; moreover, 70-day shelf life of pasteurized milk is also achieved.

Description

technical field [0001] The invention relates to a method for extending the shelf life of milk, in particular to a method for extending the shelf life of raw milk and pasteurized milk, and belongs to the technical field of liquid dairy products. Background technique [0002] At present, the temperature of milk in domestic pastures generally drops to 2-8°C after milking, and it is required to transport it to the factory for processing within 24 hours or less to prevent the raw milk from deteriorating due to too long time, which is of great importance to the pasture and production factory. There are strict requirements on the transportation distance and transportation time, which limits the long-distance and long-distance transportation of raw milk. [0003] At present, the shelf life of pasteurized milk on the market generally reaches about 10 days at 2-6°C, and the longest does not exceed 25 days. This has strict restrictions on the sales radius of pasteurized milk. Peripher...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A23C3/00A23C3/03A23C3/04
CPCA23C3/005A23C3/03A23C3/04
Inventor 王飞张永健吴太平王彩云云战友
Owner INNER MONGOLIA YILI INDUSTRIAL GROUP CO LTD
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