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Fouling of ultrafiltration membranes by transparent exopolymer particles (TEP) in seawater
TEP (transparent exopolymer particles) have been associated with biological fouling in RO (reverse osmosis) systems, but their impact on UF (ultrafiltration) systems have only been investigated recently. TEP are very sticky substances and may serve as a binding agent for rejected particles and aid their adhesion to membrane surfaces during dead-end filtration. The aim of this study is to demonstrate the possible effects of different levels of TEP to the operational performance of the UF system treating seawater. TEP concentrations in seawater were found to vary in different seasons but were generally higher than in fresh/brackish water sources. TEP rejection by UF membranes was different in various plants but a complete rejection of colloidal TEP (0.05 micron - 0.4 micron) has not been observed. Fouling rates (backwashable and non-backwashable) in the UF system were found to coincide with TEP levels in the UF feed. These findings suggest that TEP monitoring can be a promising tool in predicting the fouling potential of feedwater.
Fouling of ultrafiltration membranes by transparent exopolymer particles (TEP) in seawater
TEP (transparent exopolymer particles) have been associated with biological fouling in RO (reverse osmosis) systems, but their impact on UF (ultrafiltration) systems have only been investigated recently. TEP are very sticky substances and may serve as a binding agent for rejected particles and aid their adhesion to membrane surfaces during dead-end filtration. The aim of this study is to demonstrate the possible effects of different levels of TEP to the operational performance of the UF system treating seawater. TEP concentrations in seawater were found to vary in different seasons but were generally higher than in fresh/brackish water sources. TEP rejection by UF membranes was different in various plants but a complete rejection of colloidal TEP (0.05 micron - 0.4 micron) has not been observed. Fouling rates (backwashable and non-backwashable) in the UF system were found to coincide with TEP levels in the UF feed. These findings suggest that TEP monitoring can be a promising tool in predicting the fouling potential of feedwater.
Fouling of ultrafiltration membranes by transparent exopolymer particles (TEP) in seawater
Villacorte, Loreen O. (author) / Schurer, Rinnert (author) / Kennedy, Maria D. (author) / Amy, Gary L. (author) / Schippers, Jan C. (author)
2010
9 Seiten, 5 Bilder, 21 Quellen
Conference paper
Storage medium
English
Fouling - Organic matter fouling of ultrafiltration membranes
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Organic matter fouling of ultrafiltration membranes
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