Question

High-Temperature-Short-Time (HTST) pasteurization of milk is typically conducted at:

• A. 63°C for 30 minutes
• B. 72°C for 15 seconds
• C. 100°C for 5 minutes
• D. 135°C for 1 second

Hint:

HTST = 72°C for 15 seconds = Ideal pasteurization method.

Answer 1

The Correct Option is B

High-Temperature-Short-Time (HTST) pasteurization is a process used to kill harmful microorganisms in milk and other liquids while maintaining their nutritional quality. The HTST method typically involves heating the liquid to 72°C for 15 seconds. This process helps to achieve pasteurization without excessively heating the liquid, which would degrade the nutrients or affect the flavor.
- Option (1) 63°C for 30 minutes refers to the Low-Temperature-Long-Time (LTLT) pasteurization method, which is not HTST. This method uses a lower temperature and longer time to pasteurize milk.
- Option (3) 100°C for 5 minutes is too high and is typically associated with sterilization, not pasteurization. Sterilization uses higher temperatures to kill microorganisms.
- Option (4) 135°C for 1 second is also incorrect as it pertains to ultra-pasteurization or ultra-high temperature (UHT) processing, which is different from HTST pasteurization. UHT processing uses even higher temperatures for a much shorter duration.
Thus, the correct process for HTST pasteurization is 72°C for 15 seconds.