Ultra filtration (UF) is a pressure-driven barrier to suspended solids, bacteria, viruses, endotoxins and other pathogens to produce water with very high purity and low silt density. Typically, ultra filtration will remove high molecular-weight substances, colloidal materials, silt (SDI), and organic and inorganic polymeric molecules. It serves as a pretreatment for surface water, seawater, and biologically treated municipal effluent before reverse osmosis and other membrane systems.
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