Science and Education Publishing American Journal of Environmental Protection 2328-7233 1 1 2013 03 01 Treatment of Oil Refinery Wastewater Using Pilot Scale Fed Batch Reactor Followed by Coagulation and Sand Filtration 10 13 EN Ghulam Shabir Muhammad Afzal Soil & Environmental Biotechnology Division, National Institute for Biotechnology & Genetic Engineering (NIBGE), Faisalabad, Pakistan Razia Tahseen Samina Iqbal, Qaiser M. Khan, Zafar M. Khalid ENV2013112 10.12691/env-1-1-2 2012 12 22 2013 01 23 2013 03 01 The current study evaluates the performance of a pilot scale fed batch reactor (FBR), followed by coagulation and sand filtration, for the treatment of an oil refinery wastewater. The total reductions in COD, BOD, oil contents and phenol were 95.11%, 94.30%, 99.47% and 100%, respectively, with FBR followed by coagulation and sand filtration. This FBR-coagulation-sand filtration treatment system also removed the toxicity from the oil refinery wastewater. Treated wastewater by this approach meets National Environmental Quality Standards (NEQS) of Pakistan, and can be safely released into the environment.