Hollow fiber UF membrane water filter to clarify, concentrate and purity the streams with filtration challenges involve suspended solids, bacteria, or high concentrations of macromolecules. The nominal pore size is 0.001~0.1 μm. The micropores distribute around the wall of the membrane. The entrapping molecular weight scale is about several thousand to ten thousand. The ultrafiltration is a dynamic process, and the entrapping matter can be drained out following the concentration water. These high-tech membranes are widely used in a variety of water treatment and wastewater recycling applications by package wastewater treatment plant suppliers.