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A method and system for preserving raw milk using nitrogen gas

A raw milk and nitrogen technology, applied in the field of food science, can solve the problems of prolonging sterilization time, increasing sterilization temperature, increasing energy consumption, etc., and achieve the effects of prolonging storage time, improving production efficiency and easy operation

Active Publication Date: 2018-07-27
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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  • A method and system for preserving raw milk using nitrogen gas
  • A method and system for preserving raw milk using nitrogen gas
  • A method and system for preserving raw milk using nitrogen gas

Examples

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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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Abstract

The invention relates to a method for feeding raw milk with nitrogen to preserve raw milk. The specific steps are as follows: using air to prepare nitrogen and purifying the prepared nitrogen for pretreatment; centrifuging raw milk for milk cleaning and pre-pasteurization; using nitrogen to discharge Nitrogen gas is injected into raw milk while oxygen dissolved in raw milk is removed to obtain nitrogen-filled milk. The method for preserving raw milk of the present invention uses nitrogen, which accounts for 78% of the volume of the air, exists in the air in the form of simple substances, is inexhaustible, is a colorless, non-toxic, and tasteless inert gas, and has It is very safe and can be well mixed with raw milk. It can also flexibly adjust the input amount according to different processed products. The method is simple, easy to operate, saves storage and processing costs, and improves the production efficiency of enterprises; In addition, the present invention has low requirements on equipment and is suitable for the promotion of large-scale production in enterprises.

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 using 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 life of...

Claims

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Application Information

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Patent Type & Authority Patents(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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