Method for preserving raw milk by using nitrogen, and system thereof

A nitrogen and raw milk technology, applied in the field of food science, can solve the problems of prolonging the sterilization time, increasing the sterilization temperature, destroying nutrition, etc., and achieving the effect of prolonging the storage time, improving the production efficiency and being easy to operate.

Active Publication Date: 2014-08-20
天津海河乳品有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Once the total number of bacteria (psychrophilic bacteria and some mesophilic bacteria) in raw milk increases, toxins may be produced during storage and transportation, and it is difficult to completely kill them even through ultra-high temperature sterilization (UHT). Sterilization time further destroys nutrients and increases energy consumption

Method used

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  • Method for preserving raw milk by using nitrogen, and system thereof
  • Method for preserving raw milk by using nitrogen, and system thereof
  • Method for preserving raw milk by using nitrogen, and system thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] A method for preserving raw milk by using nitrogen gas, the specific steps are as follows:

[0034] (1) Pre-treatment: Nitrogen production by pressure swing adsorption (PSA) is passed into JHa nitrogen purification equipment to complete the purification of nitrogen;

[0035] (2) Raw milk pretreatment: After collecting fresh raw milk, use a closed centrifugal milk cleaner to separate and purify the milk. The purification volume is 1000-3000L / hour, the rotation speed of the separation bowl is 6000 rpm, and pre-pasteurization (pasteurization) 63 ℃, 15 seconds processing;

[0036] ⑶Preparation of nitrogen-filled raw milk: Use the nitrogen in step ⑴ to remove the dissolved oxygen in the raw milk in step ⑵ and fill it with nitrogen to obtain nitrogen-filled milk with a longer shelf life. The nitrogen flow rate is about 10mL / 100mL of milk, and the nitrogen gas is kept during mixing The pressure is 0.03-0.06MPa, the temperature is 6-8°C, and the nitrogen-filled milk prepared b...

Embodiment 2

[0039] A method for preserving raw milk by using nitrogen gas, the specific steps are as follows:

[0040] (1) Pre-treatment: Nitrogen production by pressure swing adsorption (PSA) is passed into JHa nitrogen purification equipment to complete the purification of nitrogen;

[0041] (2) Raw milk pretreatment: After collecting fresh raw milk, use a closed centrifugal milk cleaner to separate and purify the milk. The purification volume is 1000-3000L / hour, the rotation speed of the separation bowl is 6000 rpm, and pre-pasteurization (pasteurization) 63 ℃, 15 seconds processing;

[0042] ⑶Preparation of nitrogen-filled raw milk: Use the nitrogen in step ⑴ to remove the dissolved oxygen in the raw milk in step ⑵ and fill it with nitrogen to obtain nitrogen-filled milk with a longer shelf life. The nitrogen flow rate is about 10mL / 100mL of milk, and the nitrogen gas is kept during mixing The pressure is 0.03-0.06MPa, the temperature is 6-8°C, and the nitrogen-filled milk prepared b...

Embodiment 3

[0045] A method for preserving raw milk by using nitrogen gas, the specific steps are as follows:

[0046] (1) Pre-treatment: Nitrogen production by pressure swing adsorption (PSA) is passed into JHa nitrogen purification equipment to complete the purification of nitrogen;

[0047] (2) Raw milk pretreatment: After collecting fresh raw milk, use a closed centrifugal milk cleaner to separate and purify the milk. The purification volume is 1000-3000L / hour, the rotation speed of the separation bowl is 6000 rpm, and pre-pasteurization (pasteurization) 63 ℃, 15 seconds processing;

[0048] ⑶Preparation of nitrogen-filled raw milk: Use the nitrogen in step ⑴ to remove the dissolved oxygen in the raw milk in step ⑵ and fill it with nitrogen to obtain nitrogen-filled milk with a longer shelf life. The nitrogen flow rate is about 10mL / 100mL of milk, and the nitrogen gas is kept during mixing The pressure is 0.03-0.06MPa, the temperature is 6-8°C, and the nitrogen-filled raw milk prepar...

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PUM

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Abstract

The invention relates to a method for preserving raw milk by introducing nitrogen to the raw milk. The method concretely comprises the following steps: preparing nitrogen by using air, and carrying out purifying treatment on the prepared nitrogen; carrying out centrifuge purifying treatment on the raw milk, and pre-pasteurizing; and introducing nitrogen to discharge oxygen dissolved in the raw cow milk in order to nitrogen filled cow milk. Nitrogen used in the preservation number of the raw milk accounts for 78% of the volume of air, exists in air in a single substance form, is inexhaustible, is a colorless, nontoxic and tasteless inert gas, is highly safe, and can be well and uniformly mixed with the raw milk, and the introduction amount of nitrogen can be flexibly adjusted according to the difference of processing products. The method has the advantages of simplicity, easy operation, preservation and processing cost saving, improvement of the production efficiency of an enterprises, and low requirements on equipment, and is suitable for the large scale production popularization of the enterprise.

Description

technical field [0001] The invention belongs to the field of food science and technology, and relates to a method for preserving raw milk, in particular to a method and system for preserving raw milk by utilizing nitrogen gas. Background technique [0002] Raw milk refers to unprocessed normal milk that is extruded from the breasts of healthy dairy animals that meet the relevant national requirements without any change in composition, without adding foreign substances. With raw milk as the main raw material, various dairy products including pure milk, yogurt, milk drinks and milk powder can be made through a series of processing procedures. Milk and dairy products are rich in nutrients, and microbial contamination will seriously reduce the processability of raw milk and destroy the nutritional content and quality of milk and dairy products. Spoiled dairy products lose their edible value and even easily cause food poisoning. For a long time, in order to extend the shelf lif...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A23C3/00
Inventor 刘会平张晨萍赵范杨晓兴徐娇娇刘晓庆王宇
Owner 天津海河乳品有限公司
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