Question

how is paesturization done?
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Answer 1

Answer:

Pasteurisation makes sure milk is safe to drink (by killing any bacteria) and also helps to prolong its shelf life. The process of pasteurisation involves heating milk to 71.7°C for at least 15 seconds (and no more than 25 seconds).

Answer 2

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Ultra-high-temperature (UHT) pasteurization involves heating milk or cream to 138° to 150° C (280° to 302° F) for one or two seconds. Packaged in sterile, hermetically sealed containers, UHT milk may be stored without refrigeration for months.