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Landfill: Difference between revisions
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===[[Leachate]]=== | ===[[Leachate]]=== | ||
[[Leachate]] is any liquid that, in the course of passing through waste matter in a Landfill, extracts soluble or suspended solids, or any other component of the material through which it has passed. Landfill [[Leachate]] is | [[Leachate]] is any liquid that, in the course of passing through waste matter in a Landfill, extracts soluble or suspended solids, or any other component of the material through which it has passed. Landfill [[Leachate]] is heavily polluting in the external environment; one of the principal reasons for constructing landfill sites as containment facilities is to prevent landfill [[Leachate]] from escaping from the waste mass in an uncontrolled manner. Escape of [[Leachate]] into the underlying groundwater is a key factor in assessing the location of a landfill and the engineering containment systems to be design. | ||
Once the design of sites moved from dilute and disperse to containment designs, as shown in the previous cross-sectional diagrams, it became necessary to devise means of avoiding [[Leachate] from building up excessively within the waste mass. There are two drivers for this: (i) in extreme circumstances, the volumes could lead to levels over-topping the sides of any containment structures and leaving the site, and (ii) designing the site to maintain levels at a level as low as practically possible would improve the '''Hydraulic Risk Assessment (HRA)''' outcome for any given design. Consequently, sites were designed with means to collect and remove [[Leachate]]. | Once the design of sites moved from dilute and disperse to containment designs, as shown in the previous cross-sectional diagrams, it became necessary to devise means of avoiding [[Leachate] from building up excessively within the waste mass. There are two drivers for this: (i) in extreme circumstances, the volumes could lead to levels over-topping the sides of any containment structures and leaving the site, and (ii) designing the site to maintain levels at a level as low as practically possible would improve the '''Hydraulic Risk Assessment (HRA)''' outcome for any given design. Consequently, sites were designed with means to collect and remove [[Leachate]]. | ||