Research Article
Apr 1982
Models of Landfill Leaching: Organic Strength
Publication: Journal of the Environmental Engineering Division
Volume 108, Issue 2
Abstract
Mathematical models are applied to the dissolution, transport, and decay of organic materials in unsaturated sanitary landfills. The models are based on cascaded reactor concepts and on unsaturated moisture and contaminant transport in porous media. The roles of aerobic and anaerobic bacteria are simulated using conventional kinetic formulations. Computer simulations are obtained for landfill experiments reported by others, and good agreement with observed behavior is demonstrated. The results indicate that aerobic activity is negligible over the leaching life of a landfill, and that anerobic activity is significantly inhibited from that observed in coventional municipal wastewater treatment. Further, the processes of dilution of landfill moisture by infiltration of rainwater, and convection of materials from the landfill via leaching, are significant and in some cases the predominant influences on overall organic behavior. The retention of cells within the landfill system during leachate recycling can be a significant contributor to accelerated rates of biostabilization. The landfill models are useful in the analysis of empirical data and in the identification of important leaching processes.
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Published In
Journal of the Environmental Engineering Division
Volume 108 • Issue 2 • April 1982
Pages: 251 - 268
Copyright
© 1982 American Society of Civil Engineers.
History
Published in print: Apr 1982
Published online: Feb 11, 2021
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William A. Straub
Project Engr., Wright-Pierce Engrs., 25 Vaughan Mall, Portsmouth, N.H. 03801
Daniel R. Lynch, M.ASCE
Asst. Prof., Thayer School of Engrg., Dartmouth Coli., Hanover, N.H. 03755
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Terms of Use: ASCE Library Cards are for individual, personal use only. Reselling, republishing, or forwarding the materials to libraries or reading rooms is prohibited.