Environmental concerns are now one of the highest priorities. Environmental issues are obviously related to generation and disposal of waste. Waste is a significant problem for many facilities and businesses. Among such waste, waste oil of various types, such as motor, transmission or industrial oil are generated in large volumes.
After removing the oil from the production or processing cycle, facilities store it in special tanks for further recycling or for transportation to recycling facilities.
Onsite storage is a potential fire and environmental hazard.
All these measures are costly, besides, the duration of storage is difficult to determine. This is due to the fact that the facility cannot restore waste oil on its own due to lack of implemented technology. This waste also cannot be disposed of by, for instance, incineration, because of potential emission of large amounts of harmful substances, such as heavy metals.
Transportation of waste oil to refineries, where they can be recycled in a complete cycle with crude oil, is made more difficult by contaminants and additives, which have a negative impact on the operation of purification systems, hamper oil separation and increase the amount of oil in wastewater.
Only several decades ago used oil was dumped into the ground or into water bodies. This is unacceptably expensive both in terms of the environment and financial costs.
Regeneration is probably the most reasonable way to deal with waste motor oil. This method emerged more than 30 years ago and is still developing. Most regeneration plants allow to remove particulate matter and water from waste oil. However, this is usually not enough to restore the original quality of the fluid. Deeper regeneration requires vacuum and other processes, which automatically increases the cost of regenerated oil.
There are other methods of disposal of used motor oil. It can be used as a reagent for flotation of coal slurry or as a base of compounds for temporary protection of agricultural equipment from corrosion. Waste oil is also often used for heating purposes.