Waste Water Treatment from Petrochemical Industries: The Concept and Current Technologies-A review

Increasing consumption of oil in modern society has led to more oil refinery waste generation. The wastewater from these industries mainly contains oil, organic matter, and other compounds that need to be well managed before they can be discharged to any receiving waters. The treatment of this wastewater can be carried out by physical, biological, and chemical treatment processes. Treatment of petroleum wastewater has two stages, firstly, the pre-treatment stage reduces grease, oil, and suspended materials. Secondly, an advanced treatment stage is to degrade and decrease the pollutants to acceptable discharge values. The current review summarizes studies and investigations carried out for the treatment of petroleum industries and refineries.