Question

What is B.O.D.?

• A. The amount of $O_2$ utilised by organisms in water.
• B. The amount of $O_2$ utilized by microorganisms for decomposition.
• C. The total amount of $O_2$ present in water.
• D. All of the above.

Answer 1

The correct option is B The amount of $O_2$ utilized by microorganisms for decomposition.

Biochemical oxygen demand (BOD) is the amount of dissolved oxygen needed by aerobic biological organisms in a body of water to break down organic material present in a given water sample at certain temperature over a specific time period.