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dc.contributor.authorKerdi, Sarah
dc.contributor.authorQamar, Adnan
dc.contributor.authorAlpatova, Alla
dc.contributor.authorVrouwenvelder, Johannes S.
dc.contributor.authorGhaffour, NorEddine
dc.date.accessioned2020-04-05T12:13:19Z
dc.date.available2020-04-05T12:13:19Z
dc.date.issued2020-04-02
dc.identifier.citationKerdi, S., Qamar, A., Alpatova, A., Vrouwenvelder, J. S., & Ghaffour, N. (2020). Membrane filtration performance enhancement and biofouling mitigation using symmetric spacers with helical filaments. Desalination, 484, 114454. doi:10.1016/j.desal.2020.114454
dc.identifier.issn0011-9164
dc.identifier.doi10.1016/j.desal.2020.114454
dc.identifier.urihttp://hdl.handle.net/10754/662425
dc.description.abstractOptimization of the feed spacer geometry is one of the key challenges for improved ultrafiltration performance in water treatment and desalination. Novel feed spacers with different number of helices (1-3) along the spacer filament are proposed. To elucidate the intrinsic ability of the helical feature on filtration process improvement, experiments were conducted at two different fluid inlet velocities (U0 = 0.166 m/s and 0.182 m/s). The presence of micro-helices in the filaments aids significantly in increasing the specific permeate flux when compared to the standard spacer (without helices). The highest improvement was observed in the case of 3-helical spacer (291% specific permeate flux increase at U0 = 0.182 m/s). Furthermore, Optical Coherence Tomography OCT) imaging demonstrated less (bio)fouling amount developed on membrane surface equipped with helical spacers, whereas, a thicker and more dense cake fouling layer appeared in the case of standard spacer. Moreover, novel helical design spacers reduce the pressure drop inside the channel. The 3-helical spacer was found to have the least feed-channel pressure drop (65% of decrease relative to standard spacer). Numerical analysis was simultaneously realized by the Direct Numerical Simulation (DNS) technique to understand the hydrodynamic behavior at an elemental level inside the filtration channel. Low shear stress and high local velocity magnitudes were observed in presence of helical spacers resulting in (bio)fouling mitigation on filtration membrane surface.
dc.description.sponsorshipThe research reported in this paper was supported by King Abdullah University of Science and Technology (KAUST), Saudi Arabia. The authors acknowledge help, assistance and support from the Water Desalination and Reuse Center (WDRC) staff and KAUST Supercomputing Laboratory (KSL).
dc.publisherElsevier BV
dc.relation.urlhttps://linkinghub.elsevier.com/retrieve/pii/S0011916420302794
dc.rightsNOTICE: this is the author’s version of a work that was accepted for publication in Desalination. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Desalination, [484, , (2020-04-02)] DOI: 10.1016/j.desal.2020.114454 . © 2020. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/
dc.titleMembrane filtration performance enhancement and biofouling mitigation using symmetric spacers with helical filaments
dc.typeArticle
dc.contributor.departmentWater Desalination and Reuse Research Center (WDRC)
dc.contributor.departmentEnvironmental Science and Engineering Program
dc.contributor.departmentBiological and Environmental Sciences and Engineering (BESE) Division
dc.identifier.journalDesalination
dc.rights.embargodate2022-04-02
dc.eprint.versionPost-print
dc.identifier.volume484
dc.identifier.pages114454
kaust.personKerdi, Sarah
kaust.personQamar, Adnan
kaust.personAlpatova, Alla
kaust.personVrouwenvelder, Johannes S.
kaust.personGhaffour, Noreddine
refterms.dateFOA2020-04-05T12:14:37Z
kaust.acknowledged.supportUnitKAUST Supercomputing Laboratory (KSL)
kaust.acknowledged.supportUnitWater Desalination and Reuse Center (WDRC)
dc.date.published-online2020-04-02
dc.date.published-print2020-06


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