Premium
Rapid filtration measurement of dewatering design and optimization parameters
Author(s) -
de Kretser Ross G.,
Usher Shane P.,
Scales Peter J.,
Boger David V.,
Landman Kerry A.
Publication year - 2001
Publication title -
aiche journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.958
H-Index - 167
eISSN - 1547-5905
pISSN - 0001-1541
DOI - 10.1002/aic.690470808
Subject(s) - dewatering , filtration (mathematics) , suspension (topology) , thermal diffusivity , materials science , settling , characterization (materials science) , filter cake , composite material , mechanics , process engineering , chromatography , chemistry , engineering , geotechnical engineering , mathematics , thermodynamics , nanotechnology , environmental engineering , statistics , physics , homotopy , pure mathematics
To characterize and optimize the compressive dewatering of suspensions, rapidly determinable material parameters are required. A mathematical framework exists for characterization of dewatering using three parameters: the compressive yield stress P y (ϕ), the hindered settling function r(ϕ), and a solids diffusivity D(ϕ). A new variation on traditional constant pressure, batch filtration tests is described along with a computer‐controlled filtration apparatus that enables complete characterization of a suspension with respect to dewatering in a matter of hours. The testing methods are validated experimentally on flocculated zirconia suspensions along with calculation of the material dewatering parameters. Application of the calculated parameters to modeling of a real filtration test shows excellent agreement. Practical implications of the modeling are also discussed.