Ultrafiltration (UF) is a membrane process used to remove suspended solids, colloidal matter, high molecular weight substances, and bacteria and viruses from various feed water sources. UF membranes can achieve a low and consistent silt density index (SDI) and are often used as pretreatment for reverse osmosis using surface water, seawater and biologically treated wastewater as feed source.

The Q-SEP^® UF membranes incorporate high-strength, hollow fibers that deliver superior performance without the risk of fiber breaks. The Q-SEP^® UF membranes are made from a hydrophilic polyether sulfone (PES) material with excellent low fouling characteristics. These hollow fiber membranes operate under a pressurized inside-out flow configuration for superior performance.