Removal of Crude Oil from Oily Artificial Wastewater by Using Pulse Electrochemical Treatment

In this study electrocoagulation (ec) process with sacrificial aluminum anode was used to separate crude oil from synthetic oily wastewater emulsion. a preliminary experimental study was performed to evaluate the most accurate operating parameters, which are then used for the determination of crude oil removal efficiency. the experimental results indicated that electrocoagulation was very efficient andable to achieve 99% turbidity removal in less than 15 min,ph:7, current density: 125(a/m2). also the effect of initial concentration of crude oil (2-33 g/l) in wastewater, initial volume of wastewater (600-1800 ml), effect of flow rate (5.5-16.25 ml/s) in semi batch reactor, dose of electrolyte and type of electrolyte were optimized. during the oil removal process, polarization were occurred around anode, for omitting this problem two types of current were studied as follows: “direct current (dc)” and “pulse current (pc)” however the energy consumption were 0.012 and 0.0042 kwh/m3 respectively.