The conversion and recovery of the energy value in waste materials through the application of high temperature, controlled combustion. The recovered thermal energy can then be converted to electrical energy in steam driven turbine generators for plant use and for export/sale, or it can be exported and sold directly as steam or hot water for industrial processes and space heating. The recovered energy also can be used to generate chilled water for industrial processes or air conditioning. Most waste-to-energy projects employ combustion facilities specifically designed to accommodate the anticipated waste deliveries. These state-of-the-art, dedicated boilers are designed to extract the maximum energy value from the delivered waste materials and to simultaneously reduce the generation of potentially harmful gases and residues from the combustion process to well below stringent regulatory levels. The waste materials routinely delivered to such facilities include municipal solid wastes (MSW) such as residential and commercial wastes; non-hazardous institutional wastes; and non-hazardous, non-manufacturing industrial solid wastes. Industrial plastic wastes and post-consumer plastic plastics that cannot be economically recycled provide an excellent source of fuel for waste-to-energy facilities. There are other waste-to-energy projects that utilise existing, appropriately modified industrial or utility boilers to combust specially prepared fuels derived from solid wastes-these are called refuse derived fuels, or RDF. (Integrated Waste Services Association, "Waste Energy," IWSA, Washington, Date Unknown; Keep America Beautiful, Inc., "Overview: Solid Waste Disposal Alternatives," KAB, Inc., Stamford, Conn., April 1989).