Effects of CO2 Emissions from the Utilization of Municipal Solid Waste as Alternative Fuel and Raw Materials in Cement Production

概要

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AK System was developed as a method for recovering resources from municipal solid waste through the utilization of an applied kiln in cement. This paper compares the effects of the AK System on energy consumption, CO2 emissions, and landfill waste generation using conventional incineration and landfill disposal. Not only the reduction of landfill waste, but also energy consumption can be controlled when the processing of municipal solid waste is changed over to the AK System. CO2 emissions are also reduced when the change is implemented. CO2 emissions increased when this effect eased the chlorine tolerance in the cement. This was especially noticeable when cement already containing a high-chlorine content was utilized. Moreover, combustible waste, non-combustible waste, residues of bulky waste and resource waste can also be applied as cement raw materials and fuels through treatment using the AK system. Possibilities for achieving zero landfill from these wastes were also estimated in this study.