Patent ID: 8608813

Claim:
A method of manufacturing solid fuel mainly including synthetic resin-pulp scrap, the method comprising: breaking a waste including a disposable diaper or a disposable sanitary pad, which is failed in a manufacturing process and formed by bonding a synthetic resin waterproof film to a bottom surface of a pulp, into fragments; conveying the fragments of the waste by a screw conveyer while spraying a binding agent on the fragments and mixing the fragments with each other; and extruding the mixed waste by an extruder and drying the waste, wherein the binding agent includes a waste cooking oil, the waste cooking oil is sprayed at a weight ratio in a range of about 5 weight % to about 10 weight % with respect to a total weight of the fragments of the waste, and the waste cooking oil is sprayed through a plurality of nozzles which are installed in an entry of a cylinder of the screw conveyer at a uniform interval in a conveyance direction of the screw conveyer, or uniformly distributed at equally divided points of circumference of the cylinder in a spiral direction.