Question

Which of the following method(s) is/are used for desalination of water?

• A. Reverse Osmosis
• B. Activated Sludge Process
• C. Incineration
• D. Distillation

Hint:

For desalination, reverse osmosis and distillation are common methods, whereas processes like activated sludge and incineration are used for wastewater and waste management.

Answer 1

The Correct Option is A, D

Desalination purifies seawater for consumption and agriculture by eliminating salt and contaminants. Common desalination techniques include:

Method 1: Reverse Osmosis. This prevalent method forces seawater through a semi-permeable membrane to extract salt and impurities.

Method 2: Distillation. In this process, seawater is heated to vaporize, and the resulting steam is condensed to yield purified water, separating it from salt and other impurities.

Method 3: The Activated Sludge Process is an industrial wastewater treatment technique, not applicable to desalination.

Method 4: Incineration is a waste management procedure and is irrelevant to desalination.

Therefore, Reverse Osmosis and Distillation are the appropriate methods.