NOVELTY - Waste plastic is crushed and dissolved or dispersed in a solvent. From vapor obtained by thermal decomposition, a high-boiling portion with a boiling point of 220 degrees C or more is condensed initially. Subsequently, a low-boiling portion with a boiling point of 220 degrees C or less is condensed. While reusing one portion of everything but the high-boiling portion, and a portion of low-boiling portion as a solvent, other portion of low-boiling portion is mixed with waste edible oil, adjusted to cetane number 32-55, and changed into diesel engine fuel.    USE - Processing of waste plastic, such as waste styrene foam produced from used styrol trays and expanded polystyrene shock-absorbing materials.    ADVANTAGE - The method enables effective usage of waste heat for drying organic refuse. Electrostatic generation during crushing is prevented. The addition of aqueous solution containing electrolytes during crushing prevents corrosion of machine. The processing capacity of waste plastic and thermal efficiency are improved. Suspended matter and bad smell during exhaustion of organic refuse are burned. The method also enables effective reuse of waste edible oil, which contributes to processing in food industries.    DETAILED DESCRIPTION - Waste plastic is crushed and dissolved or dispersed in a solvent. From vapor obtained by thermal decomposition, a high-boiling portion with a boiling point of 220 degrees C or more is condensed initially. Subsequently, a low-boiling portion with a boiling point of 220 degrees C or less is condensed. While reusing one portion of everything but the high-boiling portion, and a portion of low-boiling portion as a solvent, other portion of low-boiling portion is mixed with waste edible oil, adjusted to cetane number 32-55, and changed into diesel engine fuel. The fuel is sued for driving diesel engine, a generator (30) is rotated, and electric power is produced.    DESCRIPTION OF DRAWING(S) - The drawing shows an explanatory view of the apparatus used for processing waste plastic.    Crusher (3)    Thermal decomposition tank (6)    Burner (9)    Heat exchanger (14)    Generator (30)