The Reverse Osmosis process uses a semi-permeable membrane to separate and remove dissolved solids, organics, pyrogens, submicron collodial matter, viruses, and bacteria from water. The process is called "Reverse" Osmosis since it requires pressure to force pure water across a membrane, leaving the impurities behind. Reverse Osmosis is capable of removing 95 - 99% of the total dissolved solids (TDS) and 99% of all bacteria, thus providing safe, pure water.
The technical route is as following.
Raw tank-->Booster pump -->Quartz sand filter-->activated carbon filter--->Softener-->Sediment filter-->High pressure pump-->RO desalination device-->Permeate tank