Modeling leachate production in urban solid waste landfills using a simple water balance scheme

Autores UPV
Año
CONGRESO Modeling leachate production in urban solid waste landfills using a simple water balance scheme

Abstract

One of the most important factors to address when performing the environmental impact assessment of urban solid waste landfills is to evaluate the leachate production. Leachate management (collection and treatment) is also one of the most relevant economical aspects to take into account during the landfill life. Leachate is formed as a solution of biological and chemical components during operational and post-operational phases on urban solid waste landfills as a combination of different processes that involve water gains and looses inside the solid waste mass. The values of the concentration of the different leachate components (BOD5, TOC, COD, SS, organic nitrogen, total phosphorous, alkalinity) show high variation, specially on new landfills. Infiltration of external water coming from precipitation is the most important component on this water balance. However, anaerobic waste decomposition and biogas formation processes play also a role on the balance as water-consuming processes. In this work, a simple water balance scheme is used to model leachate production in urban solid waste landfills. Results are shown for a synthetic case considering typical climatological conditions of Mediterranean catchments.