UHT milk and preparation method thereof

A technology of algae oil and microbial oil, which is applied in the direction of milk preparations, dairy products, milk preservation, etc., can solve the problems of difficult control of liquid milk addition process, easy oxidation of unsaturated fatty acid oil, complex composition of DHA powder, etc. Achieve important application value, reduce fishy smell, and excellent oxidation resistance

Pending Publication Date: 2022-03-22
CABIO BIOTECH WUHAN CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In the conventional way of adding DHA to UHT milk, you can choose to directly add oil, but polyunsaturated fatty acid oil is easy to oxidize, especially in aqueous solution, although those skilled in the art know that adding antioxidants such as carotenoids can inhibit DHA Oxidation of carotenoids, and usually the use of carotenoids in the form of crystals or oil suspension, the amount of addition and the addition process is difficult to control when applied to liquid milk, it is difficult to achieve uniformity
In addition, you can also choose to add DHA powder for preparation. Although DHA powder brings higher stability, the composition of DHA powder is more complex than that of oil, and more ingredients are introduced, and the cost is higher.

Method used

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  • UHT milk and preparation method thereof
  • UHT milk and preparation method thereof
  • UHT milk and preparation method thereof

Examples

Experimental program
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Effect test

preparation example 1

[0064] This preparation example provides a kind of DHA algae oil, and its preparation method is as follows:

[0065] (1) Get microbial oil 2000kg, add citric acid solution (concentration is 50wt%) wherein, the amount of acid that adds is 4wt% of microbial oil amount, 80 ℃ of reaction 60min, grease sedimentation 4h, after separating precipitation, continue to grease Add citric acid solution (concentration is 50wt%), the amount of acid added is 2wt% of the amount of microbial oil, react at 80 ° C for 60min, the grease settles for 3h, separate the grease, add 30wt% sodium hydroxide solution, the amount of alkali added is microbial 3 wt% of the oil content, react at 80°C for 60 minutes, settle the oil for 4 hours, filter and separate the oil, and obtain the microbial oil after alkali refining.

[0066] (2) Add activated clay to the microbial oil after alkali refining obtained in step (1), the addition of activated clay is 2wt% of the microbial oil amount, at 50°C and 800pa, stir f...

preparation example 2

[0069] This preparation example provides a kind of DHA algae oil, and its preparation method is as follows:

[0070] (1) Get the mixture of microbial oil and cell debris (the mass percentage of microbial oil in the mixture is 50%), keep it at 80°C for 60min, obtain 2000kg of grease after centrifugation and precipitation, mix it with 200kg of water, and settle the grease for 4h, After filtering and separating the precipitate, repeat the above degumming operation once again to obtain the degummed microbial oil.

[0071] (2) add gac to the degummed microbial oil that step (1) obtains, the add-on of gac is 3wt% of the microbial oil amount, at 50 ℃, 800pa, stir 30min, filter after stirring, remove adsorbent, Obtain the decolorized microbial oil.

[0072] (3) Put the decolorized microbial oil obtained in step (2) into a deodorizing tower with a vacuum degree of 800 pa, feed in steam at 90° C., keep at 150° C. for 120 minutes and then drop to normal temperature to obtain the DHA alg...

preparation example 3

[0074] This preparation example provides a kind of DHA algae oil, and its preparation method is as follows:

[0075] (1) Get microbial oil 2000kg, add citric acid solution (concentration is 50wt%) wherein, the amount of acid that adds is 4wt% of microbial oil amount, 80 ℃ of reaction 60min, grease sedimentation 4h, after separating precipitation, continue to add grease again Add citric acid solution (concentration is 50wt%), the amount of acid added is 2wt% of microbial oil amount, 70 ℃ of reaction 80min, grease sedimentation 3h, separate grease, add 30wt% sodium hydroxide solution again, the amount of alkali that adds is 3wt% of the amount of microbial oil, after reacting at 80°C for 60 minutes, the grease settled for more than 4 hours, and the grease was separated by filtration to obtain the microbial oil after alkali refining.

[0076] (2) Add clay to the microbial oil after alkali refining obtained in step (1), the addition of clay is 2.0wt% of the microbial oil, at 50°C a...

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Abstract

The invention relates to UHT milk and a preparation method thereof, preparation raw materials of the UHT milk comprise DHA algal oil and raw milk, in the DHA algal oil, the mass percentage content of DHA is more than 35 wt%, the content of carotenoid is more than 1500 [mu] g / kg, the anisidine value is less than 1.0, and the peroxide value is less than 1.0 meq / kg. The DHA algae oil contains high-content carotenoid, has excellent oxidation resistance and good safety and sensory indexes, further improves the addition amount of DHA in the preparation process of the UHT milk, can reduce the fishy smell generated by oxidation of DHA in the storage process, reduces the loss rate of DHA, maintains the content of DHA in the UHT milk at a high level, strengthens the effect of supplementing DHA, and improves the quality of the UHT milk. The important application value is realized.

Description

technical field [0001] The invention belongs to the technical field of dairy products, and relates to UHT milk and a preparation method thereof. Background technique [0002] With the improvement of people's living standards, people pay more and more attention to their own health. Dairy products have become an important source of protein and other nutrients for people. The current variety and structure of dairy products are becoming "safe, nutritious, convenient and cheap". The direction is developing rapidly. For example, the liquid milk that people drink daily includes pasteurized milk and UHT (Ultra High Temperature treated) milk. Pasteurized milk is not suitable for long-distance transportation due to its short shelf life and can only be sold within a certain geographical range. UHT milk has a longer shelf life while ensuring the nutritional content of the product, and is easier to sell on a large scale, so it is more widely used. In order to further enhance nutrition,...

Claims

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Application Information

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IPC IPC(8): A23C9/152A23C3/03A23C3/08C11B3/00
CPCA23C9/1528A23C3/03A23C3/08C11B3/001
Inventor 汪志明冷友斌李翔宇梁爱梅肖敏蒋士龙魏文艺解庆刚
Owner CABIO BIOTECH WUHAN CO LTD
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