Question

why do we add chlorine or ozone before distributing water in any water body in waste water treatment plant.​

Answer 1

Explanation:

because by adding clorine and ozone harmful bacteria are died

Answer 2

Answer:

Chlorine is a toxic gas, resulting in some danger from release associated with its use. To avoid those risks, some water treatment plants use ozone, ultraviolet radiation, or hydrogen peroxide disinfection instead of chlorine.

Explanation:

Hope this will help...