Study of Treatment Process and Development of Oily Sludge

Oily sludge is a mixture of oil and sludge, produced during the process of crude oil production and gathering, contains crude oil, heavy metal and organic toxic and harmful substances, and with the characteristics of high moisture content, poor liquidity and big volume. The recycling and disposal of it has been one of the most important aspects of enviromrntal protection in oil industry. In this paper the origin nature and hazards of oil sludge were described, the existing oily sludge treatment process from the aspects of quenched separation, heat  treatment, extraction, biological treatment were introduced, and looks forward to the development of the oil sludge treatment technology.