Gas Generation, Transport, and Extraction in Landfills
Publication: Journal of Environmental Engineering
Volume 121, Issue 1
Abstract
A model describing the generation, transport, and extraction of gas in a landfill has been developed. In the model the landfill gas is assumed to be an equimolar mixture of CH 4 and CO 2 . The waste is thought to comprise three classes of materials differing in their degree of biodegradability but all following first-order biodegradation kinetics. The model describes changes in the total pressure and not the partial pressures of the individual components. It predicts the pressure field inside a landfill, where gas extraction occurs from a number of wells placed at arbitrary points. The wells are assumed to be one-dimensional line sinks with uniform gas extraction rates. When the walls of the landfill are impermeable to flow, the model equations can be solved analytically. The full problem describing a landfill with permeable walls is treated numerically. The effect of the various parameters, such as gas-extraction rates, generation rates, and permeabilities are discussed.
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References
1.
Arigala, S. G. (1992). “Experimental and theoretical aspects of landfilling,” MS thesis, University of Southern California, Los Angeles, Calif.
2.
Esmaili, H.(1975). “Control of gas flow from sanitary landfills.”J. Envir. Engrg. Div., ASCE, 101(4), 555–565.
3.
Findikakis, A. N., and Leckie, J. O. (1979). “Numerical simulation of gas flow in sanitary landfills.”J. Envir . Engr . Div ., ASCE, 105(5), 927–945.
4.
Fogler, S. H. (1986). Elements of chemical reaction engineering . Prentice-Hall, Englewood Cliffs, N.J.
5.
Lu, A., and Kunz, C. (1981). “Gas-flow model to determine methane production at sanitary landfills.”Envir. Sci . Technol ., 15(4), 436–440.
6.
Young, A. (1989). “Mathematical modeling of landfill gas extraction.”J. Envir . Engrg ., ASCE, 115(6), 1073–1087.
Information & Authors
Information
Published In
Journal of Environmental Engineering
Volume 121 • Issue 1 • January 1995
Pages: 33 - 44
Copyright
Copyright © 1995 American Society of Civil Engineers.
History
Published online: Jan 1, 1995
Published in print: Jan 1995
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