Multiple choice

Which two chemicals are used as disinfectants in the treated water?

  1. Chlorine and ozone

  2. Nitrates and phosphorus

  3. Sulphur and nitrogen

  4. Pesticides and herbicides
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A Correct answer
Explanation

Chlorine and ozone are both powerful disinfectants used in wastewater treatment to kill or inactivate harmful pathogens, bacteria, and viruses. Chlorine provides residual protection in the distribution system, while ozone is a stronger oxidant that leaves no harmful byproducts, making them effective for water disinfection.

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