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Hydrotheek

Record nummer 2220141
Titel artikel Porosity of spacer-filled channels in spiral-wound membrane systems: quantification methods and impact on hydraulic characterization
Auteur(s) Siddiqui, A. ; Lehmann, S. ; Haaksman, V. ; Ogier, J. ; Schellenberg, C. ; Loosdrecht, M.C.M. van ; Kruithof, J.C. ; Vrouwenvelder, J.S.
Tijdschrifttitel Water research : the journal of the International Association on Water Quality
Deel(Jaar)Nummer (2017)119
Paginering 304 - 311
Online full text
Publicatie type Artikel
Taal Engels
Toelichting (Engels) The porosity of spacer-filled feed channels influences the hydrodynamics of spiral-wound membrane systems and impacts the overall performance of the system. Therefore, an exact measurement and a detailed understanding of the impact of the feed channel porosity is required to understand and improve the hydrodynamics of spiral-wound membrane systems applied for desalination and wastewater reuse. The objectives of this study were to assess the accuracy of porosity measurement techniques for feed spacers differing in geometry and thickness and the consequences of using an inaccurate method on hydrodynamic predictions, which may affect permeate production. Six techniques were applied to measure the porosity namely, three volumetric techniques based on spacer strand count together with a cuboidal (SC), cylindrical (VCC) and ellipsoidal volume calculation (VCE) and three independent techniques based on volume displacement (VD), weight and density (WD) and computed tomography (CT) scanning. The CT method was introduced as an alternative for the other five already existing and applied methods in practice.
Betrokken instanties Technische Universiteit Delft
Wetsus
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