Abstract
In order to evaluate the stabilization of landfill waste numerically, this study developed a pollutants mass balance model considering a waste layer as one box. The model considered pollutants (COD component and chlorine ion) that are released from waste. Although it was difficult to take the COD compenent in open system (OS) disposal facility. But, in closed system (CS) disposal facility which is covered and controlled by artificial watering, this study represented about 75% of the mass balance of pollutants. In the CS disposal facility, amount of watering is designed by the liquid-solid ratio (L/S ratio). The L/S ratio does not consider decay, such as biodegradation, but only washing out. The results of this study suggested that amount of watering should be determined with the decay. Also, a future prediction of leachate concentration was conducted using the model constructed in this study. As a result, in the CS disposal facility, chlorine ion might elute into leachate with high concentration. It is necessary to promote waste stabilization, such as increasing the amount of watering.
