The so-called waste engine oil, one refers to the oil in the use of impurities, such as water, dust, other miscellaneous oil and metal powder generated by the wear of the machine parts, resulting in darkening of the color and increased viscosity.

Second, the oil gradually deteriorates, producing organic acids, colloids and bituminous substances.

The regeneration of waste engine oil is the removal of impurities in the oil by sedimentation, distillation, pickling, caustic washing, filtration, etc. It is a toxic substance and belongs to the solid hazardous waste marked by the state. Waste engine oil is strictly prohibited from being bought and sold at will, and should be disposed of by a qualified waste oil treatment enterprise.

According to the Law of the People’s Republic of China on the Prevention and Control of Environmental Pollution by Solid Wastes, the Measures for the Administration of Hazardous Waste Management Licenses, and the Measures for the Administration of Transfer of Hazardous Wastes, waste motor oil, diesel oil and heavy oil are all hazardous wastes stipulated by the State. Units and individuals that produce hazardous waste must report to the environmental protection administrative department the relevant types of hazardous waste, such as the type, production, flow, storage, disposal, etc., and dispose of the hazardous waste in accordance with relevant state regulations. Units engaged in the collection, storage and disposal of hazardous wastes must apply to the environmental protection administrative department for a business license. It shall be handled by the provincial environmental protection administrative department.