Water Science & Technology: Water Supply Vol 1 No 1 pp 107–115 © IWA Publishing 2001
Evaluation of the low pressure RO and NF membranes for an alternative tyreatment of Buyukcekmece Lake
I Koyuncu, M Yazgan, D Topacik and H Z Sarikaya
Istanbul Technical University, Faculty of Civil Engineering,
Department of Environmental Engineering, 80626, Ayazaga, Istanbul, Turkey
ABSTRACT
The recent development of new generation LPRO and LPNF membranes has
received attention for application in the field of wastewater and water
treatment through an increasingly stringent regulation for drinking water
purposes and water reclamation. This paper presents the pilot scale
membrane separation studies on Buyukcekmece Lake in Istanbul with low
pressure reverse osmosis (LPRO) and low pressure nanofiltration (LPNF)
membranes. The application to treatment of anionic and cationic
pollutants (Na+, Mg2+, Ca2+,
Cl–, SO42–,
NO3–) has been investigated as a function of
transmembrane pressure and recovery rate under very low pressure range
(3, 4, 5, and 6 bars). Flux value increased with increasing pressure
and the membrane type of TFC-S gave the highest fluxes. The rejections
of ions were increased with transmembrane pressure for two types of
membranes. TFC-HR membrane rejection performance was better than the
TFC-S membrane for all anionic and cationic pollutants. As recovery
rate rises, the rejections were decreased.
Full article (PDF Format)
PAY-PER-VIEW: Buy this article for £20.00 (IWA MEMBER PRICE: £15.00)
|
