Ultrafiltration (UF) may be a membrane filtration process almost like Reverse Osmosis, using hydrostatic pressure to force water through a semi-permeable membrane. The pore size of the ultrafiltration membrane is typically 103 - 106 Daltons. Ultrafiltration (UF) may be a pressure-driven barrier to suspended solids, bacteria, viruses, endotoxins and other pathogens to supply water with very high purity and low silt density. Ultrafiltration (UF) may be a sort of membrane filtration during which hydrostatic pressure forces a liquid against a semi permeable membrane. Suspended solids and solutes of high relative molecular mass are retained, while water and low relative molecular mass solutes undergo the membrane. Ultrafiltration isn't fundamentally different from reverse osmosis, microfiltration or nanofiltration, except in terms of the dimensions of the molecules it retains. A membrane or, more properly, a semi permeable membrane, may be a thin layer of fabric capable of separating substances when a drive is applied across the membrane. Once considered a viable technology just for desalination, membrane processes are increasingly employed for removal of bacteria and other microorganisms, particulate material, and natural organic material, which may impart color, tastes, and odors to the water and react with disinfectants to make disinfection byproducts (DBP).


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