Ultra filtration (UF) is a variety of membrane filtration in which forces like pressure or concentration gradients lead to a separation through a semi-permeable membrane which having pore sizes in range of 0.1 to 0.001 micron and provide assistance in removing colloidal materials, high molecular-weight substances as well as organic & inorganic polymeric molecules. • It is asymmetric semi-permeable membrane made using high molecular material. • The hollow fiber tubes are covered by micro-pores that allow solutions flowing in/out the membranes under influence of pressure. • UF membranes have pore sizes from 0.1 to 0.005 µm for different applications. • Normally, this process is utilized in removing- o High molecular-weight substances o Colloidal materials o Bacteria o Organic/inorganic polymeric molecules