Question

Which is true about HTST pasteurization?

• A. 63°C for 30 min
• B. 50°C for 10 min
• C. 72°C for 15 sec
• D. 100°C for 5 sec

Hint:

LTLT = old batch; HTST = modern, faster, continuous!

Answer 1

The Correct Option is C

Pasteurization destroys harmful bacteria in milk without altering its taste or nutrition. The two main methods are: LTLT (Low Temperature Long Time) — heating milk at 63°C for 30 minutes in batches; and HTST (High Temperature Short Time) — heating milk at 72°C for 15 seconds using continuous flow systems. HTST is widely used in modern dairy plants because it is faster, energy-efficient, and preserves milk quality.