NOVELTY - Manufacturing solid fuel, comprises: removing non-combustible and hazardous materials from a waste stream to produce a combustible waste stream; estimating a heat value for at least a portion of the stream; adding at least one type of combustible polymer to the stream; heating and mixing the stream with at least one type of polymer to increase the structural integrity of a solid fuel formed from the mixed stream and to increase the hydrophobic properties of the solid fuel; and pressing the heated and mixed stream into objects of solid fuel, which are hydrophobic.    USE - The method is useful for manufacturing solid fuel from a solid waste stream (claimed), which is useful in current boilers and burners without retrofitting.    ADVANTAGE - The method: provides enhanced heat value and stability to the solid fuel, which is impervious to water and easy to handle, and can be stored without flaking or other degradation; and minimizes or eliminates leaching.    DETAILED DESCRIPTION - Manufacturing solid fuel, comprises: removing non-combustible and hazardous materials from a waste stream of solid materials to produce a combustible waste stream; estimating a heat value for at least a portion of the combustible waste stream; adding at least one type of combustible polymer to the combustible waste stream as needed to raise the estimated heat value of the portion of combustible waste stream to a desired heat value; heating and mixing the combustible waste stream with at least one type of combustible polymer to increase the structural integrity of a solid fuel formed from the mixed combustible waste stream and to increase the hydrophobic properties of the solid fuel; and pressing the heated and mixed combustible waste stream into objects of solid fuel which are substantially hydrophobic. INDEPENDENT CLAIMS are included for:    (1) manufacturing solid fuel, comprising removal of non-combustible and hazardous materials from a waste stream obtained from at least one of residential solid waste, commercial solid waste, and municipal solid waste to produce a substantially combustible waste stream, estimating a heat value for at least a portion of the combustible waste stream, adding at least one type of combustible polymer to the combustible waste stream as needed to raise the estimated heat value of the portion of combustible waste stream to a desired heat value, heating and mixing the combustible waste stream with at least one type of combustible polymer to increase the structural integrity and to increase the hydrophobic properties of solid fuel objects formed from the mixed combustible waste stream, and pressing the heated and mixed combustible waste stream into objects of solid fuel which are substantially hydrophobic; and    (2) manufacturing solid fuel, comprising removal of non-combustible and hazardous materials from a waste stream obtained from at least one of residential solid waste, commercial solid waste, and municipal solid waste to produce a substantially combustible waste stream, estimating a heat value for at least a portion of the combustible waste stream, selectively adding at least one type of polystyrene as a combustible polymer from a first receptacle and at least one different type of combustible polymer from a second receptacle to the combustible waste stream as needed to raise the estimated heat value of the portion of combustible waste stream to a desired heat value, heating and mixing the combustible waste stream with at least two types of combustible polymers at 300-350 degrees F to increase the structural integrity and to increase the hydrophobic properties of solid fuel objects formed from the mixed combustible waste stream, and pressing the heated and mixed combustible waste stream into objects of solid fuel which are substantially hydrophobic.