Question

Who utilizes the maximum amount of oxygen in the upstream of sewage discharge?

• A. Animals
• B. Microorganisms
• C. Humans
• D. Plants

Answer 1

Answer:

B. Microorganisms

• In the upstream of sewage water, the maximum oxygen is used by the microorganisms.

• Due to this, there is less oxygen availability in the downstream that is rivers, ponds, or the other water bodies where the fully processed wastewater is released.