Afshin Esmaili livari - Department of Chemical Engineering, Amirkabir University of Technology (Tehran Polytechnic), Tehran, Iran
Abdolreza Aroujalian - Department of Chemical Engineering, Amirkabir University of Technology (Tehran Polytechnic), Tehran, Iran Food Process Engineering and Biotechnology Research Center, Amirkabir University of Technology (Tehran Polytechnic),Tehran, Iran
Ahmadreza Raisi - Department of Chemical Engineering, Amirkabir University of Technology (Tehran Polytechnic), Tehran, Iran Food Process Engineering and Biotechnology Research Center, Amirkabir University of Technology (Tehran Polytechnic),Tehran, Iran
Mahdi Fathizadeh - Department of Chemical Engineering, Amirkabir University of Technology (Tehran Polytechnic), Tehran, Iran

Polyethersulfone (PES) due to its good chemical and thermal resistance, easy processing and environmental endurance is one of the polymeric membranes which commonly used inmembrane processes such as microfiltration (MF), ultrafiltration (UF) and nanofiltration (NF). In this work, the possibility of using the PES membrane in the ultrafiltration process for separation of oil from oil/water mixture was studied