A system for separating hydrocarbons from a solid source including a primary separation tank including a first hydrocarbon removing device to remove hydrocarbons from a slurry of water and solids. The transmission includes a drive device driving the dog clutch mechanism constituted of a hydraulic drive device driven by a hydraulic cylinder, the hydraulic cylinder being disposed in the transmission chamber. The chain drive mechanism is constituted by winding a transmission chain around a drive sprocket fitted to an output shaft and rotating horizontally and a driven sprocket connected to the rotating direction changing mechanism and rotating horizontally. Temperatures at the meibomian glands reach desired levels more quickly and efficiently when heating the inside of the eyelid.