Ultrafiltration (UF) is a separation process using membranes with pore sizes in the range of 0.1 to 0.001 micron. Typically, UF membranes will remove high molecular-weight substances, colloidal materials, and organic and inorganic polymeric molecules allowing only fresh water and dissolved minerals to pass through. This is widely used water treatment membrane in industry and commercial and now available for domestic use with lots of benefits comparing with reverse osmosis membrane(RO) such as saving minerals after filtration, no storage tank is required and no waste water would be produced.