SUSTAINABILITY OF LINER MATERIALS IN A MUNICIPAL LANDFILL CONSTRUCTED USING LOCALLY AVAILABLE EXPANSIVE SOILS

摘要

Due to open solid waste dumping, the water and soil pollution by leachate has now become a major environmental problem in Sri Lanka. In the engineered landfills, bottom liners are used to prevent the migration of contaminant in to the ground water. Compared to the Geosynthetic clay liners (GCL) and High density polyethylene (HDPE), Compacted Clay liners (CCL) are less expensive if materials are locally available. According to the USEPA recommendations the minimum thickness of CCL liner is 1 m.