What are the four types of pressure membrane recognised for the treatment of water?

Water treatment membrane is the process in which it removes all the unwanted substance from the water. Basically, the water treatment process facilities the different types of the membrane for uses in the process of cleaning the water surface for drinking.

There are basically four types of pressure driven membrane recognised for the treatment of water are:

Micro-filtration Nano-filtration Reverse osmosis Ultra-filtration