Question

What are the different steps in large scale water purification?

Answer 1

The different steps in large scale water purification are:

1. Water is first pumped from rivers or lakes to large tanks of water works.
2. Water is allowed to stand in large sedimentation tanks for few hours.
3. The clear water from sedimentation tank is filtered through a layer of sand and gravel. It can also be done through activated charcoal which gives better quality water.
4. The water is then disinfected using chlorine gas. This kills germs, and harmful bacteria.
5. The purified water is then pumped into the supply system. The water is used for drinking and household purposes.