Question

The method of food processing for removal of bad odours from food:

• A. Flash distillation
• B. Steam distillation
• C. Batch distillation
• D. Gas adsorption

Hint:

In the oil industry, this is often the final stage of refining (RBD oil), ensuring the oil is neutral in taste and smell before reaching the consumer.

Answer 1

The Correct Option is B

Removing unwanted smells from a food product, most commonly edible oil, usually means getting rid of small amounts of volatile compounds responsible for the off odour. Steam is bubbled through the hot oil, and because these odorous compounds are volatile, the steam carries them away and out of the product, especially effective when done under vacuum since it allows this stripping to happen at a lower temperature. This steam based stripping process is called steam distillation, and it is the standard method used for deodorising oils and fats.