Hydrological and geochemical factors affecting leachate composition in municipal solid waste incinerator bottom ash part I: the hydrology of landfill Lostorf, Switzerland

摘要

The objective of the investigation of the municipal solid waste incinerator(MSWI)bottom ash landfill, Landfill Lostorf, was to determine the residence time of water in the landfill and the flow paths through the landfill. Over a period of 22 months, measurement of rainfall, landfill discharge and leachate electrical conductivity were recorded and tracer experiments made. Over the yearly period 1995, approximately 50/100 of the incident rainfall was measured in the discharge. An analysis of single rain events showed that in winter, 90-100/100 of rainfall was expressed in the landfill discharge, whereas in summer months, the value was between 9 and 40/100 depending on the intensity of the rain event.