Multiple choice

The wastewater treatment involves physical, chemical and biological processes. Which of the following impurities is/are not removed by the physical process?

  1. Large plastic bags

  2. Sand

  3. Pebbles

  4. Germs

  5. Cans

Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Yes, it is correct, as germs cannot be removed by physical process only. It is removed by the chemical process, in which chlorination is done.