Pasteurized fresh milk, aiming at retaining the natural nutrition of milk, adopts low-temperature sterilization technology and has the characteristics of "pure nature, original taste and activity".
The first method is to heat the milk to 62~65℃ and keep it for 30 minutes.
This method can kill all kinds of growth pathogens in milk, and the sterilization efficiency can reach 97.3%~99.9%.
After disinfection, only some thermophilic bacteria, thermotolerant bacteria and spores remain, but most of these bacteria are lactic acid bacteria, which are not only harmless to people, but also beneficial to health.
At the same time, pasteurized fresh milk has extremely high requirements for milk sources, and fresh and safe pasture milk sources must be used, and milk powder reduction is not allowed.
The second method is to heat the milk to 75 ~ 90℃ 15 ~ 16 seconds.
The sterilization time is shorter and the working efficiency is higher. But the basic principle of sterilization is that it can kill pathogenic bacteria. If the temperature is too high, more nutrients will be lost.
How long can pasteurized milk be preserved? Pasteurized milk should be stored at about 4℃, generally only for 3~ 10 days, at most 16 days.
In a certain temperature range, the lower the temperature, the slower the bacterial reproduction.
The higher the temperature, the faster the reproduction (generally, the suitable temperature for microbial growth is 28℃-37℃).
But if the temperature is too high, the bacteria will die.
Different bacteria have different optimum growth temperature and heat and cold tolerance.
In fact, pasteurization is to use the characteristics of bacteria that are not very heat-resistant, and treat them with appropriate temperature and heat preservation time to kill them all.
However, after pasteurization, a small amount of harmless or beneficial bacteria or bacterial spores remain and should be eaten as soon as possible.
What are the benefits of drinking pasteurized milk? 1. pasteurized milk contains a lot of calcium, which can supplement the calcium needed by human body and contribute to the growth and development of teenagers.
2. Practice shows that drinking a cup of warm pasteurized milk before going to bed is really helpful to sleep.
3. Of course, the most important thing is rich protein, amino acids and vitamins, which are essential nutrients for human body every day. These can be obtained from pasteurized milk.
4. Pasteurized milk can also prevent arteriosclerosis and maintain the health of middle-aged and elderly people.
5, pasteurized milk contains a lot of vitamin B, which can protect your eyesight. And accelerate fat metabolism, reduce acne and acne.
Do you want to heat pasteurized milk when you drink it? After pasteurization, the hygiene of fresh milk can reach the standard completely, and it does not need to be heated again.
If the elderly, children and other people with weak gastrointestinal function drink it, the pasteurized fresh milk can be heated, but the temperature should be controlled between 30-35 degrees, and should not exceed 40 degrees.
Because the longer the heating time and the higher the temperature, the more serious the loss of nutrients.