In many nations across the world, the simple, inexpensive reverse osmosis (RO) process has helped people in both the commercial and residential sectors to attain an adequate supply of clean drinking water for many years now.
Desalination, converting saltwater into potable fluids, has become a reality because of RO systems. RO is currently the most effective solution to supply drinking water to drought-stricken areas or places with inadequate supply of potable water.
The RO system extracts inorganic solids (such as salts) from a solution like seawater, for instance, to turn seawater into more potable form. Highly concentrated water is pushed through a semi permeable membrane, filtering impurities and contaminates, and allowing only water to pass through.
An advanced membrane technology, called the crossflow membrane filtration, is now being used in many industries to improve water quality for use in their products. It involves a more complex setup, though, as the crossflow was developed primarily for wide-scale operations, and requires more than the simple porous membrane to function efficiently. The types of filtration systems that can use this membrane technology include RO, ultrafiltration (UF), nanofiltration (NF), and microfiltration (MF).
The Crossflow Membranes
The crossflow design functions basically the same in that solute particles are blocked, but the crossflow filtration involves a more complex process. RO separates the solute from the solvent by reversed stream with highly concentrated solution moving into the part with low concentration. With the crossflow reverse osmosis machine, a transmembrane pressure creates two exit streams: the feed stream that passes across the surface of the crossflow membrane to produce the retentate stream, and the permeate stream that pushes through the membrane to filter more purified water.
Four Groups of Membranes
Membranes come in different pore sizes, and each serve certain functions depending on what is required to be filtered out and retained. The film in RO has the smallest pores, suitable for desalination, and only permits the smallest organic molecules and some uncharged solutes to the other side. The largest pores are in the UF membrane, which may only remove large particles like colloidal silica. The NF membrane functions like a “loose” RO because it allows some inorganic salts to enter, but may eliminate other organic compounds, as desired.
When looking for a commercial reverse osmosis systems provider for your venture, it’s important to choose only reputable manufacturers like AXEON Water Technologies with their extensive inventory of equipment to suit most filtration functions.
Treating Industrial Water with Membrane Technology. Web.archive.org
How Reverse Osmosis Works. Science.howstuffworks.com