Question

What is the temperature of LTLT pasteurization for milk?

(a) 125 – 138°C

(b) 115 – 120°C

(c) 63°C

(d) 63 – 65°C

This question was posed to me in an interview for job.

My question is from Process Engineering Applications topic in division Process Engineering Applications in Food Industry of Food Processing Unit Operations

Answer 1

The correct option is (c) 63°C

Easiest explanation: Ultra-pasteurization temperature is 125 – 138°C for 2-4 seconds. Sterilization of milk in container is 115 – 120°C for 20-30 minutes. LTLT pasteurization of milk is 63°C for 30 minutes and for thermisation it is 63 – 65°C for 15 seconds.