Question

How can we make river water safe for drinking ?

Answer 1

The river originates from the mountains.

River water gets contaminated with sewage and factory waste is thrown into them

How can we make river water safe for drinking

• Avoid throwing sewage directly into the river.
• Instead of using insecticide and fertilizer use the eco-friendly product.
• The used water treatment plant makes water safe for drinking.
• Steps include in the water treatment plant:

1. Sedimentation and decantation - in this step we removed the solid waste by sedimentation.
2. Coagulation and loading - in this step the dirt particles which is not removed during sedimentation due to their lightweight. we used an alum to make them heavy so they easily settled down.
3. Filtration- In this step removed fine particles by using a filter bed. solid impurities retain on the filter paper.
4. Disinfection -in this step used some chemicals to kill the germs like chlorine and ozone.