Ultrafiltration (UF) is a membrane process used to remove suspended solids, colloidal matter, high molecular-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 surface water, seawater and biologically treated wastewater as feed source.

QUA’s EnviQ® flat sheet submerged ultrafiltration membranes have been specially developed to improve the ease of operation and maintenance of MBR facilities. EnviQ’s innovative design offers ultrafiltration quality product water with a stronger and more rugged PVDF flat sheet membrane. The unique features in EnviQ consist of reverse diffusion and specially designed air diffusers, which maximize scrubbing efficiency, lowers pressure and reduces cleaning.

Technology:
EnviQ membranes have billions of microscopic pores on the surface that form a barrier to impurities, allowing clean water to pass. Water is drawn through the pores by using gentle suction. EnviQ provides more consistent and higher quality effluent using an advanced PVDF reinforced membrane and proprietary diffuser system. The proprietary air diffuser design maintains a continuous flow of consistent/correct sized air bubbles. This then prevents solids from settling at the tank bottom or sticking to the membrane surface and eliminating septic conditions.