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Influence of Spatial Variation of Hydraulic Conductivity of Municipal Solid Waste on Performance of Bioreactor Landfill

Reddy, Krishna R and Kulkarni, Hanumanth S and Srivastava, Amit and Babu, Sivakumar GL (2013) Influence of Spatial Variation of Hydraulic Conductivity of Municipal Solid Waste on Performance of Bioreactor Landfill. In: JOURNAL OF GEOTECHNICAL AND GEOENVIRONMENTAL ENGINEERING, 139 (11). pp. 1968-1972.

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Official URL: http://dx.doi.org/10.1061/(ASCE)GT.1943-5606.00009...

Abstract

The current study analyzes the leachate distribution in the Orchard Hills Landfill, Davis Junction, Illinois, using a two-phase flow model to assess the influence of variability in hydraulic conductivity on the effectiveness of the existing leachate recirculation system and its operations through reliability analysis. Numerical modeling, using finite-difference code, is performed with due consideration to the spatial variation of hydraulic conductivity of the municipal solid waste (MSW). The inhomogeneous and anisotropic waste condition is assumed because it is a more realistic representation of the MSW. For the reliability analysis, the landfill is divided into 10 MSW layers with different mean values of vertical and horizontal hydraulic conductivities (decreasing from top to bottom), and the parametric study is performed by taking the coefficients of variation (COVs) as 50, 100, 150, and 200%. Monte Carlo simulations are performed to obtain statistical information (mean and COV) of output parameters of the (1) wetted area of the MSW, (2) maximum induced pore pressure, and (3) leachate outflow. The results of the reliability analysis are used to determine the influence of hydraulic conductivity on the effectiveness of the leachate recirculation and are discussed in the light of a deterministic approach. The study is useful in understanding the efficiency of the leachate recirculation system. (C) 2013 American Society of Civil Engineers.

Item Type: Journal Article
Additional Information: copyright for this article belongs to ASCE
Keywords: Landfills; Moisture; Biological processes; Solid wastes; Municipal wastes; Pore water; Two phase flow; Hydraulic conductivity; Numerical models; Bioreactor landfills; Moisture distribution; Leachate; Biodegradation; Municipal solid waste; Pore-water pressure; Two-phase flow; Hydraulic conductivity; Numerical modeling; Reliability analysis
Department/Centre: Division of Mechanical Sciences > Civil Engineering
Depositing User: Id for Latest eprints
Date Deposited: 11 Nov 2013 11:34
Last Modified: 11 Nov 2013 11:34
URI: http://eprints.iisc.ac.in/id/eprint/47736

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