To provide a regenerative equipment for the waste oil of a hot rolling oil for aluminum and aluminum alloy capable of obtaining an oil reusable again for use such as a hot rolling oil or a hydraulic fluid or the like from an extracted oil.

This equipment installs a discharging means DC to discharge the deteriorated hot roll oil from the upper layer of a dirty oil tank DT, a storage tank 4, an addition device 5 of an aqueous solution of citric acid, an agitator 6, an organo-metallic compound removing means 7 replacing the organo- metallic compound in the discharged deteriorated hot roll oil into the solid of a metal citrate by adding and agitating citric acid in a fixed ratio of citric acid to the deteriorated hot roll oil, and an auto-discharging vertical separating plate type centrifugal separator 10 as a separating means separating the prescribed solid, sludge and water from the oil treated by the organo-metallic compound removing means 7.