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Environmental aspects |
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University of Padua IMAGE Department |
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v All waste management procedures should produce materials which can be disposed in a landfill without an adverse environmental impact for long-term periods (final storage) v A proper lining and a proper geological environment are basic prerequisites for final storages v The important gas production lasts only about one or two decades v The long-term emission potential of a landfill is determined by the evolution of leachate fluxes and leachate pollutants Aftercare of landfills • Top cover to reduce or stop leachate production • Once the liner may collapse the emissions from the landfill will occur • Controlled water infiltration and in-situ aeration in order to reduce the emission potential of existing landfills • Mechanical biological pre-treatment for existing and new landfills (PAF-Model) Attenuation of Leachate Pollutants in Groundwater • Dilution • Redox processes • Biodegradation • Sorption • Complexation • Precipitation/dissolution • Ion exchange Groundwater Control Monitoring at Sanitary Landfills • To detect the release of leachate into aquifer in spite of the measures taken to avoid it (top covers, liner systems, drainage systems) • Comparison of the collected data to a reference to identify whether the data deviate from the normal situation • Number and location of monitoring wells as a compromise between requested level of probability for detecting a leachate leakage and the cost of installing the wells and operating the control monitoring programme • Selection of proper monitoring parameters (inorganic ions) |