The use of Dean vortices in coiled hollow-fibre ultrafiltration membranes for water and wastewater treatment

Mass transfer in ultrafiltration for water and wastewater treatment is improved by Dean vortices. With this secondary flow, which appears in a coiled hollow-fibre module, the shear stress is higher than in a straight module and is a maximum near the external wall of the coiled tube. As a consequence...

Full description

Saved in:
Bibliographic Details
Published in:Desalination 1998-09, Vol.118 (1), p.73-79
Main Authors: Guigui, C., Manno, P., Moulin, P., Clifton, M.J., Rouch, J.C., Aptel, P., Laîné, J.M.
Format: Article
Language:English
Subjects:
Applied sciences
Chemical and Process Engineering
Chemical engineering
Dean vortices
Engineering Sciences
Exact sciences and technology
Flux improvement
General purification processes
Hollow fibre
Membrane separation (reverse osmosis, dialysis...)
Pollution
Ultrafiltration
Wastewater
Wastewaters
Water treatment and pollution
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Mass transfer in ultrafiltration for water and wastewater treatment is improved by Dean vortices. With this secondary flow, which appears in a coiled hollow-fibre module, the shear stress is higher than in a straight module and is a maximum near the external wall of the coiled tube. As a consequence, concentration polarisation and cake deposition are reduced and the limiting flux in ultrafiltration of model fluids (bentonite and yeast suspensions) and activated sludge is improved by up to 5 times. The effect of the hydrodynamic conditions and feed concentration is tested. An energy analysis shows that an improvement in permeate flux is found at a given energy consumption.
ISSN:0011-9164
1873-4464
DOI:10.1016/S0011-9164(98)00089-7