NOVELTY - Floating oil is mixed with high-concentration wastewater and alkaline powder, supplied in mixing chamber, ground, dried in drying chamber, disposed in mixing chamber, grounds, mixed with alkaline powder. Primarily mixed floating oil is introduced in mixing and cooling chamber, and secondarily mixed uniformly and aged by transferring and mixing screw rotating. Secondarily mixed and aged floating oil is introduced in mixing and ageing chamber, which is thirdly mixed and aged, and ground. Thirdly mixed and aged floating oil is introduced in forming chamber and dried.    USE - Method for solidifying floating oil in food wastewater.    ADVANTAGE - The method economically and efficiently solidifies floating oil having excellent effect.    DETAILED DESCRIPTION - Floating oil is introduced (AA) in high-concentration wastewater of food waste disposal (BB) into a reservoir using a suction pump, mixed with alkaline powder supplied from alkaline powder (CC) container in a mixing chamber to solify the floating oil, ground into certain size, and formed same into a certain size in a forming chamber. The floating oil is introduced into drying chamber, dried at certain temperature, and transferred into pellets to a pellet container by using a belt conveyor. The mixing chamber is a slicing double-screw horizontally disposed and connected to a driving motor, and grinds floating oil at 300-500 rpm into a size of 5 mm or less to primarily mix (DD) with alkaline powder. 5-15 wt.% Alkaline powder is mixed with 85-95 wt.% floating oil to carry out exothermic reaction between alkaline powder and moisture in the floating oil. The moisture in the floating oil is partly evaporated and discharged into the atmosphere through an upper portion of the mixing chamber. The primarily mixed (EE) floating oil is introduced into a mixing and cooling chamber which is horizontally disposed with a volume twice as large as that of the mixing chamber, and secondarily mixed uniformly and aged by transferring and mixing screw rotating in low-speed for 5-15 minutes. The moisture is generated when the secondarily mixed and aged floating oil is discharged into the atmosphere through an upper portion of the mixing and cooling chamber, and naturally cooled at 40-60 degrees C, and ground into a size of 3 mm or less by a grinding roller having blades disposed at a center of the mixing and cooling chamber. The secondarily mixed and aged floating oil is introduced into mixing and ageing chamber which is horizontally disposed with a volume twice as large as that of the mixing and cooling chamber, and transferred by a double-bladed screw, whixh is thirdly mixed and aged for 5-15 minutes, and ground into a size of 2 mm or less by a grinding roller having blades disposed at a center of the mixing and ageing chamber. The thirdly mixed and aged floating oil is introduced into the forming chamber having holes in a diameter of 5-10 mm and passed through the holes being cut into a diameter of 5-10 mm and certain length, into pellets. The pellets are introduced into the drying chamber and dried indirectly by hot air of 40-60 degrees C supplied from a hot air pipe for 2-4 hours, which is prevented from condensation, having a moisture content of 10% or less, and discharge control valve is disposed at a lower portion of the drying chamber to control drying speed and drying duration of the pellets within the drying chamber. The moisture content of final product is adjusted into a desired level, and transferred the pellets to the pellet container.    DESCRIPTION OF DRAWING(S) - The drawing shows a flow chart explaining solidification process of floating oil. (Drawing includes non-English language text)    Floating oil in a high concentration of wastewater (AA)    Inject the oil into a storage reservoir by means of a suction pump (BB)    Inject alkaline powder (CC)    Inject into a mixer and perform mixing process (DD)    Inject the primary mixture into a mixer and cooler perform mixing, ageing and cooling process (EE)