National Repository of Grey Literature 3 records found  Search took 0.00 seconds. 
Barriers preventing the leachate mobility from MSW landfills
Hošek, Michal ; Ettler, Vojtěch (advisor) ; Šebek, Ondřej (referee)
This bachelor thesis summarizes the current knowledge on precautions releted to the leachate migration outside the municipal solid waste (MSW) landfill. It is mainly focused on the characteristics of the engineered barriers, consisting of functional layers and providing better protection of the environment in the vicinity of the landfill with respekt to leached pollutants. These barriers, supported by natural geological barrier in the ground, are typically forming a sandwich construction. Materials called geonets are used for the bottom lining functioning primarily as a drainage layer. They are characterized by their low compressibility tunder conditions of overpressure of waste deposited above. Geomembranes with chemical and mechanical stability serve as barriers against leachates and other emissions. Natural clays are also used due to their sorption capacity, however their application depends on their exact mineralogical composition. Geosynthetic clay liners (GCLs) have permeability at least 4.5 × 10-11 m.s-1 and serve as a protective layer against contamination of groundwater, but also protect the lining in the layers below. To increase the efficiency of this layered system, a drainage layer is commonly added, which also helps to minimize the pressure effects of landfill leachate on the...

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