A fuel composition comprising less than about 10 percent-by-weight water, greater than about 30 percent-by-weight solids and from about 30 to about 70 percent-by-weight of a combustible nonaqueous, generally water insoluble liquid, the composition having a minimum heat value of at least 5000 BTU per pound and a viscosity such that said composition is pumpable at ambient temperature, the composition being conveniently derived, for example, from a waste stream containing a liquid, nonaqueous fraction, a solids fraction and an aqueous fraction, such as refinery waste, waste from aluminum smelting processes, paint waste or other industries.