A Reverse Osmosis plant comprises of membranes made of polyaaid, etc. The spirally bound membranes are subjected to pressure to complete the process of Reverse Osmosis. They are typically used whenever salt removal or deionization is required. Reverse osmosis removes more than 97%-99% of the total dissolved solids along with organics, bacteria and other particulates.
Reverso Osmosis is becoming more and more popular viz a viz ion exchange process because of input TDS restrictions in ion exchange and ease of operation.