DOI: 10.1016/j.watres.2018.04.049
Scopus记录号: 2-s2.0-85047402713
论文题名: Fouling resilient perforated feed spacers for membrane filtration
作者: Kerdi S. ; Qamar A. ; Vrouwenvelder J.S. ; Ghaffour N.
刊名: Water Research
ISSN: 431354
出版年: 2018
卷: 140 起始页码: 211
结束页码: 219
语种: 英语
英文关键词: CFD
; Filtration
; Fouling
; Novel design spacers
; Optical coherence tomography (OCT)
; Perforated spacers
Scopus关键词: Computational fluid dynamics
; Drops
; Fighter aircraft
; Filtration
; Fouling
; Geometry
; Hydrodynamics
; Membrane fouling
; Membrane technology
; Optical tomography
; Pressure drop
; Shear stress
; Water treatment
; Hydrodynamic performance
; Membrane filtrations
; Novel design
; Perforated spacers
; Performance enhancements
; Shear-stress fluctuations
; Spacer-filled channels
; Spiral wound membranes
; Microfiltration
; computational fluid dynamics
; experimental design
; filtration
; fouling
; geometry
; hydrodynamics
; membrane
; performance assessment
; tomography
; water treatment
; Article
; biofilm
; biomembrane
; cell size
; comparative study
; computer aided design
; energy consumption
; filtration
; hydrodynamics
; optical coherence tomography
; polymerization
; priority journal
; scanning electron microscopy
; shear stress
; steady state
; surface property
; three dimensional printing
; water treatment
; artificial membrane
; biofouling
; devices
; equipment design
; filtration
; pressure
; procedures
; water management
; Biofouling
; Equipment Design
; Filtration
; Hydrodynamics
; Membranes, Artificial
; Pressure
; Printing, Three-Dimensional
; Water Purification
英文摘要: The improvement of feed spacers with optimal geometry remains a key challenge for spiral-wound membrane systems in water treatment due to their impact on the hydrodynamic performance and fouling development. In this work, novel spacer designs are proposed by intrinsically modifying cylindrical filaments through perforations. Three symmetric perforated spacers (1-Hole, 2-Hole, and 3-Hole) were in-house 3D-printed and experimentally evaluated in terms of permeate flux, feed channel pressure drop and membrane fouling. Spacer performance is characterized and compared with standard no perforated (0-Hole) design under constant feed pressure and constant feed flow rate. Perforations in the spacer filaments resulted in significantly lowering the net pressure drop across the spacer filled channel. The 3-Hole spacer was found to have the lowest pressure drop (50%–61%) compared to 0-Hole spacer for various average flow velocities. Regarding permeate flux production, the 0-Hole spacer produced 5.7 L m−2.h−1 and 6.6 L m−2.h−1 steady state flux for constant pressure and constant feed flow rate, respectively. The 1-Hole spacer was found to be the most efficient among the perforated spacers with 75% and 23% increase in permeate production at constant pressure and constant feed flow, respectively. Furthermore, membrane surface of 1-Hole spacer was found to be cleanest in terms of fouling, contributing to maintain higher permeate flux production. Hydrodynamic understanding of these perforated spacers is also quantified by performing Direct Numerical Simulation (DNS). The performance enhancement of these perforated spacers is attributed to the formation of micro-jets in the spacer cell that aided in producing enough unsteadiness/turbulence to clean the membrane surface and mitigate fouling phenomena. In the case of 1-Hole spacer, the unsteadiness intensity at the outlet of micro-jets and the shear stress fluctuations created inside the cells are higher than those observed with other perforated spacers, resulting in the cleanest membrane surface. © 2018 Elsevier Ltd Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/112719
Appears in Collections: 气候减缓与适应
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作者单位: King Abdullah University of Science and Technology (KAUST), Water Desalination and Reuse Center (WDRC), Biological and Environmental Science and Engineering (BESE), Thuwal, 23955-6900, Saudi Arabia
Recommended Citation:
Kerdi S.,Qamar A.,Vrouwenvelder J.S.,et al. Fouling resilient perforated feed spacers for membrane filtration[J]. Water Research,2018-01-01,140