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...

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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
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cited_by cdi_FETCH-LOGICAL-c438t-1114e5b5fb9454ccdfb756a42b1367733bdea79db288c21cc67f8e30dda1a71f3
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container_title Desalination
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description 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.
doi_str_mv 10.1016/S0011-9164(98)00089-7
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source ScienceDirect Journals
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
title The use of Dean vortices in coiled hollow-fibre ultrafiltration membranes for water and wastewater treatment
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