What is RO (reverse osmosis)?
Reverse osmosis  is the process of forcing a solvent from a region of high solute concentration through a semipermeable membrane to a region of low solute concentration in the result of applying an external pressure to reverse the natural flow of pure solvent.
Reverse osmosis is in the final category of membrane filtration, 0.1nm , to remove pollutants and microorganisms and a common method of desalination, groundwater purification, drinking water purification,removing minerals from boiler water.  

EDI system

EDI is a revolutionary technology for the water treatment.This technology uses the demineralization process of electrical regeneration ion exchange instead of traditionaldemineralization process of mixed ion exchange DI .The resin and selective ion membrane can reach high desalination effect by exchanging the ion ,and if the process is combined with reverse osmosis ,the water quality can be up to 15-18 Mn.CM EDI uses the standard modules in design and can be assembled into arbitrary system according to the requirement ,water output can be up to 0.5-60M3/H