Please use this identifier to cite or link to this item: http://dspace.library.iitb.ac.in/xmlui/handle/10054/5288
Title: A Mean Phi model for pressure filtration of fine and colloidal suspensions
Authors: RAHA, S
KHILAR, KC
PRADIP
KAPUR, PC
Keywords: Compression-Permeability Cells
Side-Wall Friction
Cake Filtration
Constant-Pressure
Flocculated Suspensions
Filter Cakes
Yield-Stress
Palm-Oil
Consolidation
Expression
Issue Date: 2006
Publisher: CANADIAN SOC CHEMICAL ENGINEERING
Citation: CANADIAN JOURNAL OF CHEMICAL ENGINEERING, 84(1), 83-93
Abstract: A working model for engineering analysis of pressure filtration is presented. Based on the filtration characteristics of fine and colloidal suspensions, the process was divided into two stages. A time-invariant spatially uniform volume fraction of solids approximation is invoked in the growing filter cake stage (stage 1). A time-dependent spatially uniform volume fraction of solids assumption is made in the cake consolidation stage (stage 2). The two models, named collectively as Mean Phi (M-P) model, have a common physical basis, seamless continuity between the stages and internal consistency. The M-P model has only three parameters: terminal or equilibrium volume fraction of solids in the filter cake that is related to its compressive yield stress, critical volume fraction of solids, which joins stage 1 and stage 2, and a permeability factor, which is common to stages 1 and 2. The model is validated with a large number of colloidal suspensions filtered under highly diverse physical-chemical process conditions. A Pareto profile is identified that relates the timescale of filtration and the extent of dewatering achieved, the two most important performance indices of the process.
URI: http://dspace.library.iitb.ac.in/xmlui/handle/10054/5288
http://hdl.handle.net/10054/5288
ISSN: 0008-4034
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