... one-stage Ro device used in food, beverage, chemical, hospitals, electronic industries of water treatment equipment.Reverse osmosis ... aperture very small and can effectively remove dissolved in water salts, colloid, and microbial, organic matter, etc. (removal ... colloid, microbiology organic materials, germ, protozoa, pathogens, bacteria, inorganic chemical and so on. 2) No need to add any chemicals ...