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ABSTRACT
The disposal of municipal solid waste (MSW) in landfills is a critical component of modern waste management systems. As landfills are designed to contain and isolate waste from the surrounding environment, the effectiveness of the containment largely depends on the performance of the liner systems used. However, the selection of the most suitable liner material and configuration remains a significant challenge, as different liners exhibit varying levels of effectiveness under different environmental conditions and stressors. This study help recommends most suitable selection and provides valuable insights on the liner materials helping engineers, environmental scientists, and policymakers make informed decisions regarding landfill design and management. The methodology involved collecting samples from two distinct sampling points on the study area (Oluku dumpsite) at the depths of 1m and 2m by means of the manual Hand Auger. The research involves a thorough review of soil sampled properties, which was evaluated using a range of tests, including moisture content determination, specific gravity measurement, particle size distribution (sieve analysis), liquid and plastic limits, linear shrinkage, hydraulic conductivity (via the Kozeny– Carman method), and triaxial compression tests. The Properties of other liners material such as geomembrane liners, Geosynthetic liners, and composite clay liners were summarized from already researched work and were compared to my laboratory results to know the most suitable option. It was discovered that liners material used in study area (Oluku dumpsite) have a permeability value ranging from 5.06x 10ିcm/s to 7.6x10ିcm/s which is very close compared to the standard allowance for hydraulic conductivity is 1.0x10ି cm/s and that of other liners (geomembrane, geosynthetics and composite clay) have very extremely low values range of 1.0x10ିଵଶcm/s to 1.0x10ିଵସcm/s, which implies that they will offer the best overall protection due to their enhanced durability and low permeability.
