From Water Treatment
Ultrafiltration is a membrane process that separates colloidal or solid material, emulsified oils, microbiological materials, and large organic molecules. It is different from microfiltration and nanofiltration primarily in the size of the molecules it retains. The range of separation is generally 10,000 to > 80,000 molecular weight. Common applications of microfiltration include the removal and recovery of oils, surfactants and paints from waste streams, clarification of wines and juices, and polishing of ultra pure water for bacteria and particle removal.