Reverse osmosis system is using city water as raw water, then treat water by Pre-filter (water softener is optional), reverse osmosis membrane. It can remove particle, colloid, organic impurity, heavy metal ion, bacteria, virus in water, and it can also remove 99% dissolved salt. The whole system desalination rate can reach 96%-99% to make permeated water conductivity <10 us/cm. Dense water also won’t polluted environment. Reverse osmosis equipment no need to consider about input water quality too much. And the main features of RO equipment is no need to do any regeneration, it can be keep stable for long time.

 
 
Process
Untreated water feed pump →Quartz sand filtration→ Active carbon filtration → Security filter → 1st stage high pressure pump →1st stage RO system→2nd stage high pressure pump→2nd stage RO system→EDI system→UV sterilizer→Polished mixed bed system→output supply point 
 
Some parts function for your reference as below^^:
Quartz sand filter: fill quarts sand inside, it can filter big particles impurities, suspended substances, colloids etc.
Activated carbon filter: fill activated carbon inside, to remove color, odor, residual chlorine and organics substances.
Security filter: fill PP filter cartridge inside, prevent large particles, bacteria, viruses into RO membrane, accuracy is 5um.
Chemical dosing system/ Water softener: add antiscalant(buyer supply)/add cation resin inside , absorb Ca2+, Mg2+(main elements for composing scale), reduce hardness of raw water.
RO membrane: can remove particles, colloids, organic impurities, heavy metal ions, bacteria, virus, heat source etc. harmful substances and 99% dissolved salts.
UV sterilizer: for killing bacterial in water, be safe for drinking.
CIP system: its help to cleaning the RO membrane, so that it can be have long life span^^