Ultrafiltration or UF is a pressure-driven membrane separation process used to remove particulate matter from aqueous solutions. Ultrafiltration membranes have typical pore sizes in the range of 0.01 to 0.10 µm and efficiently remove bacteria and most viruses, colloids and silt. The smaller the nominal pore size, the higher the removal efficiency. Watera’s Ultrafiltration units provide an efficient way to treat water for re-cycling purposes making it suitable for applications such as irrigation or chillers or as an initial pre-treatment stage to a reverse osmosis plant.