Utilization of a rotary drum composter to facilitate separation of a mixed municipal solid waste stream into combustible (food waste, paper, yard wastes, etc.) and combustible (plastic, rubber, wood, clothing, etc.) fractions and using the high BTU combustible fraction as a primary fuel, that can be supplemented with other combustible wastes such as Construction and demolition wastes and tires, for gasification to produce a usable and burnable gas for power production.