An Insight into Oil and Grease Removal from Wastewater from Petroleum and Refinery Industries

Wastewater treatment for removal of organic matter, inorganic matter and heavy metals is becoming increasingly important area of research. The disposal of wastewater to sea and other reservoirs can cause serious environmental problems. Wastewater from petroleum and refineries contains organic matter in various forms. Biodegradable and nonbiodegradable pollutants call for different biological and physical treatments for wastewater. The presence of oil and grease causes different problems including health effects. They also have adverse effects on treatability. The present review presents an insight into treatment technologies used for oil and grease removal from wastewater.