Leachate Leachate Leachate Leachate Leachate Leachate Leachate Leachate Leachate Leachate Leachate Leachate Leachate Leachate Leachate Leachate Leachate Leachate

22 22 45 45 20.4 Leachate 20.4 Leachate Water balance Water balance rain fall evapotranspiration infiltration discharge infiltration in the soil 23 23 45 45 20.4 Leachate 20.4 Leachate Two classical approaches Two classical approaches  “ “ Attenuate and disperse” design: a certain amount of Attenuate and disperse” design: a certain amount of leachate entering into the subsoil is considered leachate entering into the subsoil is considered acceptable, soil processes reduce the impact acceptable, soil processes reduce the impact  “ “ Containment”design: a natural or synthetic barrier Containment”design: a natural or synthetic barrier inhibits inhibits release of leachate into the subsoil release of leachate into the subsoil 24 24 45 45 20.4 Leachate 20.4 Leachate Attenuate and disperse Attenuate and disperse 25 25 45 45 20.4 Leachate 20.4 Leachate Drainage system attenuate and Drainage system attenuate and disperse disperse 26 26 45 45 20.4 Leachate 20.4 Leachate Containment design sanitary Containment design sanitary landfilling landfilling 27 27 45 45 20.4 Leachate 20.4 Leachate Containment design sanitary Containment design sanitary landfilling landfilling 28 28 45 45 20.4 Leachate 20.4 Leachate Drainage system sanitary landfill Drainage system sanitary landfill 29 29 45 45 20.4 Leachate 20.4 Leachate Drainage system sanitary landfill Drainage system sanitary landfill 30 30 45 45 20.4 Leachate 20.4 Leachate Leachate treatment Leachate treatment  Leachate can not be discharged untreated Leachate can not be discharged untreated  Treatment can be necessary in first approach, but a must Treatment can be necessary in first approach, but a must in second approach in second approach  Amounts of leachate can be reduced by recirculation Amounts of leachate can be reduced by recirculation  Treatment options are municipal waste water treatment Treatment options are municipal waste water treatment plant, lagoons, wetlands, activated sludge systems plant, lagoons, wetlands, activated sludge systems 31 31 45 45 20.4 Leachate 20.4 Leachate