Refining black oil No acid used during operation. More environmentally friendly. ItemUnitGER-1GER-3GER-5Treatment ... oil, gasoline engine oil, and used hydraulic oil, other used lubrication oil of machinery.Used oil regeneration system can effectively remove ... scent rapidly. ========oil recycling,oil regeneration,oil refining,used oil reclamation,black oil refinery,oil decolor,oil dehydration, ...