Question

_______ is the quickest way to sterilize solutions without heating.

(a) Filtration

(b) Chemical method of sterilization

(c) Steam Sterilization

(d) Chlorine dioxide gas

This question was posed to me during an interview for a job.

My doubt stems from Heat Transfer Applications in division Heat Transfer Applications of Food Processing Unit Operations

Answer 1

Correct option is (a) Filtration

The explanation is: Filtration is the fastest way to sterilize solutions without heating. In this method the filters with a pore diameter of 0.2 um are used for the removal of bacteria. But they cannot be used to remove fungi and virus as they are in smaller size compared to bacteria.