Experimental Study of Filter Cake Cracking during Deliquoring

Abstract

This thesis is a description of the work carried out at Imperial College London for this PhD. The work presented here is the original work of the author and where sources of information have been used, they have been referenced accordingly. No part of this thesis has been submitted for a degree at this or any other university.

Modelling Faecal Sludge Dewatering Processes in Drying Beds Based on the Results from Tete, Mozambique

“…Drainage is a filtration process in which the filter medium retains a fraction of the solids at the surface and allows the liquid mass to pass through [13,14]. When the SDBs are loaded, three distinct phases may occur (Figure 1): (a) an initial phase, during which the suspended solids deposit on the surface of the filter medium with formation of the "cake", leaving a lesser dense liquid mass interface at the top; (b) an intermediate phase, or filtration phase, in which the thickness of the cake remains approximately constant and the depth of the liquid at the top progressively decreases by drainage; (c) the final phase, which is characterised by the disappearance of the liquid mass from the cake and the formation of cracks within the solid material.…”

An Innovative Agent-Based Cellular Automata Framework for Simulating Articular Cartilage Biomechanics

“…On one hand, the resistance to fluid flow through a porous medium is highly related to the amount of solid and fluid present [242]. On the other hand, the ratio of fs shows the amount of fluid and solid in the hybrid agent which is in the range of zero to infinity.…”

“…Permeability of a porous structure depends on its resistance to fluid flow through it where the amount of solid and pores (fluid) present in the structure is a determining factor for this resistance [242]. The resistance to fluid flow varies between zero, i.e.…”

“…Permeability of a porous structure depends on its resistance to the fluid flow through it where the amount of solid and pores (fluid) present in the structure is a determining factor for this resistance [242]. The resistance to fluid flow varies between zero and infinity, where in the absence of the pores (fluid) in the porous medium, the resistance to fluid flow is infinite resulting in zero permeability [243].…”

“…zero permeability would give rise to infinite resistance [243]. The resistance to fluid flow through a porous medium is highly related to the amount of solid and fluid present [242]. At one extreme, when there is no solid present, the medium is fully porous and the resistance to fluid flow is zero.…”