The case for examining fluid flow in municipal solid waste at the pore-scale - A review

Waste Management & Research : the Journal of the International Solid Wastes and Public Cleansing Association, ISWA
Syed Muaaz-Us-SalamMichael John Harbottle

Abstract

In this paper, we discuss recent efforts from the last 20 years to describe transport in municipal solid waste (MSW). We first discuss emerging themes in the field to draw the reader's attention to a series of significant challenges. We then examine contributions regarding the modelling of leachate flow to study transport via mechanistic and stochastic approaches, at a variety of scales. Since MSW is a multiphase, biogeochemically active porous medium, and with the aim of providing a picture of transport phenomena in a wider context, we then discuss a selection of studies on leachate flow incorporating some of the complex landfill processes (e.g. biodegradation and settlement). It is clear from the literature survey that our understanding of transport phenomena exhibited by landfilled waste is far from complete. Attempts to model transport have largely consisted of applying representative elementary-scale models (the smallest volume which can be considered representative of the entire waste mass). Due to our limited understanding of fluid flow through landfilled waste, and the influence of simultaneously occurring biogeomechanical processes within the waste mass, elementary-scale models have been unable to fully describe the fl...Continue Reading

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Citations

Jun 26, 2020·Frontiers in Microbiology·D'Arcy R Meyer-DombardJudy Malas
Apr 11, 2021·Waste Management & Research : the Journal of the International Solid Wastes and Public Cleansing Association, ISWA·Ajay Singh

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Methods Mentioned

BETA
X-ray
imaging techniques

Software Mentioned

GasSim
MODFLOW
HYDRUS
- SURFACT
HYRUS
COMSOL Multiphysics

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