case study on anticipated leachate generation from a semi-aerobic sanitary landfill at Aruwakkalu (Puttalam District) and its impacts

Leachate generation from sanitary landfills is regularly expected in tropical regions whenever the municipal solid wastes (MSW) attain its field capacity. However, there seems to be no studies documenting the behavior of high moisture laden MSW in sanitary landfills constructed or proposed in arid areas. Therefore, in this study prediction of leachate quantities is conducted using the water balance method with reference to a semi-aerobic sanitary landfill that would be designed to dispose 1,130 tons of pre-compacted MSW per day (in 2035) having a high moisture content of 70 % by w/w from the Metro Colombo Region which has a mean annual rainfall of 2,500 mm (but the landfill to be sited in Aruwakkalu; an arid area having a mean annual rainfall of