... different requirements in different field, we can make a appropriate design for you. 1) Adopts RO membrane from VONTRON, which ... .7% inorganic salt, heavy metal ion and completely get rid of colloid, microbiology organic materials, germ, protozoa, pathogens, bacteria, ... . 6) Automatically and manually wash RO membrane. Also the design of washing the RO membrane is by chemical solution (citric acid ...