Question

In the waste water treatment plant (WWTP) air is pumped into water to

• A. Support the growth of anaerobic bacteria
• B. Support the growth of aerobic bacteria
• C. Disinfect water
• D. Blow human waste

Answer 1

The correct option is B Support the growth of aerobic bacteria

The waste water treatment plant has been set up in order to reduce the entry of the pollutants from the industries into the water bodies. The activated sludge method is used in the treatment of the waste water. The air is sparged in these aeration tanks. The air promotes the growth of the aerobic bacteria and other organisms which help in the breakdown of the organic matter which is present in the wastes.

Thus, the correct answer is option B.