Comprehensive Oily Wastewater Treatment Process for Oil Depot Tank Areas

Oily wastewater in the tank source from the dock, the tank area,and oil distribution facilities. The oily wastewater from the dock primarily comprises ballast water from oil tankers, tank cleaning water, and top water of  process; the oily wastewater from oil distribution facilities mainly includes wastewater produced during the operation of loading platforms, pump rooms, and associated pipelines; and the oily wastewater from the tank area constitutes the majority of the oily wastewater in the oil depot, which includes cut water from tank , tank cleaning water, equipment and ground flushing water, and contaminated rainwater.

The separation device of oil-water removes organic impurities, floating oil, and dispersed oil from wastewater, filtering out all particles larger than 0.3μm in size, achieving the effect of oil removal and water clarification. The oily wastewater pretreated by the separation device of oil-water is then treated by a complete set of biochemical treatment equipment to meet emission standards.

The specific process for treating oily wastewater in the tank area of an oil depot is as follows: