Ultrafiltration uf is a membrane process used to remove colloidal matter, High molecular, Suspended solids, Weight substances, 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 seawater and, Surface water biologically treated wastewater as feed source. Q, Sep uf membranes incorporate high strength hollow fibers which deliver superior performance without the likelihood of fiber breaks. These uf membranes composed of a hydrophilic polyether sulfone pes material with excellent low fouling characteristics and operate under a pressurized inside, Out flow configuration for superior performance. Q, Sep modules are crafted from nsf, Pdwep certification for drinking water application