Javid Gholami-Shiri - Master of Science degree in chemical engineering, Environmental Research Center in Petroleum and Petrochemical Industries, School of Chemical and Petroleum Engineering, Shiraz University, Shiraz, Iran. National Iranian Drilling Company,
Ciavosh Salari - Master of Science degree in chemical engineering, Islamic Azad University of Mahshahr, Iran, National Iranian Drilling Company,
Shabnam Dehghani - Master of Science degree in chemical engineering, Department of Chemical Engineering, University of Sisitan and Baluchestan, Zahedan, Iran,
Mahdi Sharifi - Master of Science degree in petroleum engineering, National Iranian Drilling Company

One of the most challenging problems of the last decades is the presence of recalcitrant hydrocarbons compounds (gas oil) in the effluents of drilling industry, due to their toxicity on both human health and environment. Although conventional biological processes are usually efficient for the degradation of pollutants in wastewaters, most of these compounds are not effectively removed. In this context, Advanced Oxidation Processes (AOPs) are illustrated for the removal of organic pollutants which not treatable by conventional techniques due to their high chemical stability and/or low biodegradability. In order to reduce operating costs associated to the application of AOPs and enhance remediation, combination of biological treatment and advance oxidation processes in drilling industry is recommended

biological treatment, Advance oxidation processes, wastewater treatment, drilling industry