1. Different technologies
The biggest difference between reverse osmosis technology of pure water machines and ultrafiltration membrane technology of ultrafiltration machines is the filtration accuracy.
Reverse osmosis: refers to the process of applying an external pressure higher than the osmotic pressure of the solution on the water inlet side of the membrane, allowing only water and certain components in the solution to selectively pass through, while other substances cannot pass through and are trapped on the surface of the membrane. , referred to as RO, its filtration precision is 0.0001 micron.
Ultrafiltration: A physical screening process that uses pressure difference as a driving force to separate molecular weights ranging from hundreds to millions and with a membrane pore size of about 0.001 to 0.2 microns. It is referred to as UF. Its filtration precision is 0.001 microns.
2. Different structures
Pure water machine: It has a booster pump, requires power, has a water storage tank, and is generally a five-stage filtration. The first stage is PP cotton filter element, the second and third stages are activated carbon, the fourth stage is RO reverse osmosis membrane used in aerospace technology, and the fifth stage is refined activated carbon, which is mainly used to improve the taste.
Pipeline ultrafiltration machine: There is no motor and no power supply. It relies on water pressure to drive filtration. It uses stainless steel pipes as the body and has a built-in high-flow ultrafiltration membrane. Relying on the principle of physical screening to purify water sources.
Mineral multi-stage ultrafiltration machine: No need for electricity, usually with filter elements of level 5 or above. The filtration process has the functions of interception, adsorption and adjustment. It is suitable for southern cities with low water hardness and low scale content, which are mainly surface water sources. . and some northern cities.
3. Functional aspects
Reverse osmosis pure water machine: It can remove impurities, rust, sediment, colloids, bacteria, viruses, as well as radioactive particles, organic matter, fluorescent substances, and pesticides that are harmful to the human body. It can also remove alkali and heavy metals; it can remove water, alkali, and heavy metals from water. All trace elements.
Ultrafiltration membrane water purifier: It can filter out impurities, rust, some bacteria, viruses, colloids, etc. in tap water. The filtered water retains the original mineral content in the water.
4. Disadvantages
Reverse osmosis pure water machine: The pure water machine will produce wastewater during the water production process. It is generally suitable for areas with heavy scale, high water hardness, and serious water pollution. As far as the current situation in our country is concerned, pure water machines are an effective way to solve water pollution in most areas.
Ultrafiltration water purifier: adsorbs residual chlorine, removes peculiar colors, odors, and impurities, but is not very effective against heavy metals and water alkali. The most critical factor is determining which technology of water purifier to install based on the regional water quality environment.