... , manganese, rust, colloid material, mechanical impurities, suspended solids and other particles in the above 20UM of substances hazardous to ... the reverse osmosis membrane fouling, system can automatically recoil, and so is red. RO system1. Using imported HYDRANAUTICS RO ... , high desalination rate, low operation cost, RO membrane auto wash and manual wash .RO membrane wash use medicament in machine2. ...