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Effect of aeration on fresh and aged municipal solid waste in a simulated landfill bioreactor.
| Content Provider | CiteSeerX |
|---|---|
| Author | Warith, Mostafa A. Takata, Graham J. |
| Abstract | Municipal solid waste (MSW) is slow to stabilize under conventional anaerobic landfill conditions, demanding long-term monitoring and pollution control. Provision of aerobic conditions offers several advantages including accelerated leachate stabilization, increased landfill airspace recovery and a reduction in greenhouse gas emissions. Air injection was applied over 130 days to bench-scale bioreactors containing fresh and aged MSW representative of newly constructed and pre-existing landfill conditions. In the fresh MSW simulation bioreactors, aeration reduced the aver-age time to stabilization of leachate pH by 46 days, TSS by 42 days, TDS by 84 days, BOD5 by 46 days and COD by 32 days. In addition, final leachate concentrations were consistently lower in aerated test cells. There was no indication of a gradual decrease in the concentration of ammonia, and it is likely this high ammonia concentration would continue to be problematic in bioreactor landfill applications. This study focussed only on biodegradability of organics in the solid waste. The concentrations of the nonreactive or conservative substances such as chloride and/or heavy metals remain in the bioreactor landfills due to the continuous recir-culation of leachate. The results of this study demonstrate the potential for air injection to accelerate stabilization of municipal solid waste, with greatest influence on fresh waste with a high biodegradable organic fraction. Key words: aerobic bioreactor, landfill simulation, municipal solid waste, waste age, leachate, stabilization |
| File Format | |
| Access Restriction | Open |
| Subject Keyword | Aged Municipal Solid Waste Municipal Solid Waste Simulated Landfill Bioreactor Air Injection Bioreactor Landfill Aerobic Condition Waste Age Aerated Test Cell High Ammonia Concentration Solid Waste Leachate Ph Greenhouse Gas Emission Aerobic Bioreactor Aver-age Time Fresh Msw Simulation Bioreactors Conventional Anaerobic Landfill Condition Heavy Metal Several Advantage Conservative Substance Landfill Airspace Recovery High Biodegradable Organic Fraction Bench-scale Bioreactors Final Leachate Concentration Pollution Control Continuous Recir-culation Bioreactor Landfill Application Landfill Simulation Pre-existing Landfill Condition Accelerated Leachate Stabilization Aged Msw Representative Key Word Gradual Decrease Long-term Monitoring Fresh Waste |
| Content Type | Text |
