Question

Pasteurization is done at

• A. 73 °C for 20 min
• B. 63 °C for 30 min
• C. 72 °C for 30 seconds
• D. 63 °C for 30 seconds

Answer 1

The Correct Option is B

In microbiology, pasteurization is a process used to kill pathogenic bacteria in food and beverages, specifically targeting heat-sensitive microorganisms. There are different methods and temperature-time combinations for pasteurization. Here, we will focus on understanding the correct pasteurization condition from the given options:

1. Pasteurization at 73 °C for 20 min: This is not a standard method for pasteurization.
2. Pasteurization at 63 °C for 30 min: This is known as the Low Temperature Long Time (LTLT) pasteurization method. It is a widely recognized and effective procedure used to ensure the safety of milk and other dairy products by reducing harmful microorganisms.
3. Pasteurization at 72 °C for 30 seconds: Known as the High Temperature Short Time (HTST) method, this is another standard approach for pasteurizing milk.
4. Pasteurization at 63 °C for 30 seconds: This time-temperature combination is not standard for effective pasteurization.

Based on the information, the correct method for effective pasteurization from the given options is at 63 °C for 30 min, which refers to the LTLT pasteurization method.