how do we purify our water mechanically?tell me the process?

Question

an example can be , a water filter from which you drink water.

Answer 1

Drain it through a sand bed
Run it through reverse osmosis
Water filters on faucets combine a mechanical filter for particles and chemical action for odors and hazards like viruses and bacteria.

Answer 2

It depends on what you are trying to remove from the water. For example if you are removing salt from sea water then you would use reverse osmosis.