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

Document Type: Research Paper

Authors

Abstract

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

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