And Longterm Problems with Leachate 375

Kai-Uwe Heyer and Rainer Stegmann

15.1 Introduction 375

15.2 Biochemical Processes in Sanitary Landfills 375

15.2.1 Aerobic Degradation Phases 376

15.2.2 Anaerobic Degradation Phases 376

15.2.3 Factors Affecting Leachate Composition 378

15.2.3.1 Waste Composition 380

15.2.3.2 Water Balance 380

15.2.3.3 Landfill Age 381

15.3 Sanitary Landfilling and Leachate Control Strategies 381

15.3.1 Leachate Problems in Landfills 381

15.3.2 Sanitary Landfilling and Legal Requirements 381

15.3.3 Control of Waste Input and Pretreatment before Deposition 382

15.3.4 Control of Water Input and Surface Sealing Systems 382

15.3.5 Control of Leachate Discharge into the Environment and Base Sealing Systems 384

15.3.6 Leachate Treatment 386

15.3.7 Environmental Monitoring 387

15.4 Long-term Problems with Leachate 388

15.4.1 Lysimeter Tests in Landfill Simulation Reactors (LSR) 388

15.4.2 Prognosis of Periods of the Long-Term Time Course of Emissions 390

15.5 Controlled Reduction of Leachate Emissions 391

15.5.1 In Situ Stabilization for the Closing and Aftercare of Landfills 391

15.5.2 Technical Methods for Water Infiltration and Effects on Leachate 392

15.5.3 Aerobic In Situ Stabilization and Effects on Leachate Contamination 392 References 394

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