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

Content Provider	Springer Nature Link
Author	Kularatne, Ranil K. A.
Copyright Year	2014
Abstract	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 <1,500 mm). This article also discusses the feasibility of leachate treatment (considering the expected quality) and other issues that would arise due to leachate generation. Leachate production occurs during the peak rainy seasons (October; 2nd inter-monsoonal period and November–December; north-east monsoonal period) only despite the fact that the incoming MSW has a high moisture content. Furthermore, the generated leachate is a methanogenic leachate with a low BOD$_{5}$/COD (<0.3). At higher leachate heads, leachate breakthrough time and the time of travel (TOT) for Cl$^{−}$ are lower, but seepage velocities and flow rates are higher for both leachate and Cl$^{−}$. Breakthrough time and hydraulic conductivity show an inverse relationship considering groundwater contamination in Aruwakkalu having a silty-sand soil (33–93 % sand), but no proper relationship between breakthrough time and seepage velocity.
Starting Page	7255
Ending Page	7274
Page Count	20
File Format	PDF
ISSN	18666280
Journal	Environmental Earth Sciences
Volume Number	73
Issue Number	11
e-ISSN	18666299
Language	English
Publisher	Springer Berlin Heidelberg
Publisher Date	2014-11-27
Publisher Place	Berlin, Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Breakthrough time Leachate Municipal solid wastes Sanitary landfill Water balance Geology Hydrology/Water Resources Geochemistry Environmental Science and Engineering Terrestrial Pollution Biogeosciences
Content Type	Text
Resource Type	Article
Subject	Global and Planetary Change Earth-Surface Processes Soil Science Environmental Chemistry Pollution Geology Water Science and Technology

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