Utilization of stabilized wastes as cover material is one of the possible options for utilization of stabilized wastes from the dump-site. The cover material can help mitigating methane emission from the landfill cell. Loose texture of stabilized wastes encouraged air diffusion from the soil surface whereas fine organic fraction available in the stabilized wastes has good water holding capacity and nutrients to stimulate methane oxidation reaction. This re-search is exploring a possibility to utilize those degraded organic wastes as biofiltration materials reducing methane emission at newly developed sanitary landfills once the operation those old waste dumping area are terminated