Question

When the rate of the consumption of organic matter of the effluent by floes increases, then the BOD of the effluent.

• A. Significantly increases
• B. Significantly reduces
• C. No change in BOD
• D. Oxygen is not required for this process

Answer 1

The correct option is A Significantly increases

• Biochemical oxygen demand (BOD) is a measure of how much organic pollution is in water. The BOD test measures the amount of dissolved oxygen in water that is used up due to the breakdown of organic pollutants, such as sewage, in a certain number of days.
  
• Increased BOD means that a lot of oxygen is being used up, typically by bacteria breaking down organic material.
  

So, the correct option is 'Significantly increases'.