Preparation method of sterilized cow milk with reduced alpha-dicarbonyl compounds

A technology of dicarbonyl compounds and milk, which is applied in the field of preparation of sterilized milk to reduce a-dicarbonyl compounds, to achieve the effect of reducing safety risks

Inactive Publication Date: 2021-05-28
TIANJIN UNIVERSITY OF SCIENCE AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, low temperature pretreatment combined with static ultra-high pressure sterilization has not been applied in dairy processing

Method used

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  • Preparation method of sterilized cow milk with reduced alpha-dicarbonyl compounds
  • Preparation method of sterilized cow milk with reduced alpha-dicarbonyl compounds
  • Preparation method of sterilized cow milk with reduced alpha-dicarbonyl compounds

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] A method for preparing sterilized milk that reduces alpha-dicarbonyl compounds, comprising the steps of:

[0021] 1) Skim treatment: clean the raw milk and centrifuge it at 3500g for 18 minutes at 15°C to remove the fat in the upper layer to obtain low-fat milk with a fat content of 1.5%;

[0022] 2) Canning: filling the raw milk pretreated in step (1) in aseptic food-grade PET bottles;

[0023] 3) Ultra-high pressure sterilization: put the canned milk in step (2) in an ultra-high pressure device, working medium: water, working medium temperature: 5°C, and treat it at 520MPa for 12 minutes to reduce a-dicarbonyl Compound of sterilized milk.

Embodiment 2

[0025] A method for preparing sterilized milk that reduces alpha-dicarbonyl compounds, comprising the steps of:

[0026] 1) Skimming treatment: clean the raw milk and centrifuge at 4000g for 5 minutes at 15°C to remove the fat in the upper layer to obtain low-fat milk;

[0027] 2) Canning: filling the raw milk pretreated in step (1) in aseptic food-grade PET bottles;

[0028] 3) Ultra-high pressure sterilization: put the canned milk in step (2) in an ultra-high pressure device, working medium: water, working medium temperature: 6°C, and treat it at 500MPa for 25 minutes to reduce a-dicarbonyl Compound of sterilized milk.

Embodiment 3

[0030] A method for preparing sterilized milk that reduces alpha-dicarbonyl compounds, comprising the steps of:

[0031] 1) Skimming treatment: clean the raw milk and centrifuge at 3000g for 15 minutes at 15°C to remove the fat in the upper layer to obtain low-fat milk;

[0032] 2) Canning: filling the raw milk pretreated in step (1) in aseptic food-grade PET bottles;

[0033] 3) Ultra-high pressure sterilization: put the canned milk in step (2) in an ultra-high pressure device, working medium: water, working medium temperature: 3°C, and treat it at 600MPa for 15 minutes to reduce a-dicarbonyl Compound of sterilized milk.

[0034] Table 1 and figure 1 Compared with commercially available pasteurized milk, ESL milk and UHT milk, Example 1 and Example 2 can significantly reduce glyoxal (GO), methylglyoxal (MGO), Diacetyl (2,3-BD) and 3-deoxyglucosone (3-DG) content. Compared with UHT milk, more than 50% of a-dicarbonyl compounds produced by thermal processing can be reduced ...

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Abstract

The invention discloses a preparation method of sterilized cow milk with reduced alpha-dicarbonyl compounds. Fresh raw milk which is qualified according to an inspection result is used as raw milk in the invention. The method comprises the following steps: (1) degreasing treatment: after purifying the raw milk, centrifuging 3000-4000 g of the purified raw milk at a temperature of 15 DEG C for 10-2 minutes, and removing upper-layer fat to obtain low-fat milk; (2) canning: canning the raw milk pretreated in the step (1) into a sterile food-grade PET bottle; and (3) ultrahigh-pressure sterilization: putting the canned milk in the step (2) into an ultrahigh-pressure device, and treating the canned milk at 500-600 MPa for 15-25 min to obtain the sterilized milk in which the alpha-dicarbonyl compounds are reduced. By using the method disclosed by the invention, alpha-dicarbonyl compounds including glyoxal, pyruvic aldehyde, butanedione and 3-deoxyglucaldehyde ketone generated in traditional hot-processed liquid milk can be effectively reduced and controlled, nutrient loss is reduced, and the quality safety of the liquid milk is improved.

Description

technical field [0001] The invention relates to a method for preparing sterilized milk with reduced alpha-dicarbonyl compounds, belonging to the field of liquid dairy product processing. Background technique [0002] Milk is very rich in nutritional value, such as protein, sugar, fat, a large number of minerals and vitamins, etc. These nutrients are easily absorbed by the human body and have a beneficial impact on human health. In order to ensure food safety and product quality, raw milk needs to be properly heat-treated before entering the market to kill pathogenic microorganisms and extend the shelf life as much as possible. At present, pasteurization, ultra-pasteurization (ESL), and ultra-high temperature transient sterilization (UHT) are the most commonly used thermal processing processes in commercial milk and dairy products. Common commercially available liquid milks include pasteurized milk, ESL milk and UHT milk. [0003] Milk is rich in milk protein and lactose, a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A23C3/00A23C7/04
CPCA23C3/00A23C7/046
Inventor 张燕吴士莹赵润民吴玥琨吴亚敬
Owner TIANJIN UNIVERSITY OF SCIENCE AND TECHNOLOGY
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