Host: Japan Society of Material Cycles and Waste Management
RDF is what combustible materials of house garbage are crushed, dried, and pelletized. Currently, total 400,000 tons of RDF are produced a year. About 300,000 tons of RDF are used for fuel of power generation and the rest of RDF are used for normal fuel. The quality of the fuel varies according to collection method, seasons and regions because of being influenced by the type of household garbage. Among the characteristics of RDF, the calorific value (noticed typically) is 19-23 MJ/kg and the chlorine level is 0.5-1.0wt%. To make use of RDF as versatile fuel, it is required that the calorific is more stable and the chloride concentration is lower regarding boiler corrosion. In process of RDF manufacture, we established that the calorific value and the chlorine level could be controlled by mixing secondary material. In this study, it is indicated not only that the calorific value is increasing by mixing powdered rubbers and that the chlorine level is decreasing by mixing barks in an actual operation, but also that the chlorine level is decreasing by mixing the dried sewage sludge that which is expected to use as fuel, in an experimental stage.
