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dc.contributor.authorAl-juboori, Raed A.
dc.contributor.authorNaji, Osamah
dc.contributor.authorBowtell, Les
dc.contributor.authorAlpatova, Alla
dc.contributor.authorSoukane, Sofiane
dc.contributor.authorGhaffour, NorEddine
dc.date.accessioned2021-01-28T06:40:47Z
dc.date.available2021-01-28T06:40:47Z
dc.date.issued2021-01-18
dc.date.submitted2020-07-01
dc.identifier.citationAl-juboori Raed A., Naji, O., Bowtell, L., Alpatova, A., Soukane, S., & Ghaffour, N. (2021). Power effect of ultrasonically vibrated spacers in air gap membrane distillation: Theoretical and experimental investigations. Separation and Purification Technology, 262, 118319. doi:10.1016/j.seppur.2021.118319
dc.identifier.issn1873-3794
dc.identifier.issn1383-5866
dc.identifier.doi10.1016/j.seppur.2021.118319
dc.identifier.urihttp://hdl.handle.net/10754/667071
dc.description.abstractThis study investigates the efficiency of low-power ultrasound in the range of 3.5–30.0 W to improve permeate flux and alleviate membrane fouling in an air–gap membrane distillation (AGMD) system. Natural groundwater and reverse osmosis (RO) reject water were fed into the AGMD system on which fouling experiments were conducted with hydrophobic polyvinylidene fluoride (PVDF) membrane. After 35 h of AGMD system operation with groundwater and RO reject water, fouling caused the permeate flux to decrease by 30% and 40% respectively. Concentration polarization, intermediate pore blocking, and cake filtration appear to be the main reasons for flux decline with both feedwater types. Ultrasound application for a short period of 15 min resulted in flux improvement by as high as 400% and 250% for RO reject and groundwater, respectively. Modelling of the heat and mass transfers showed that the flux increase was mainly due to membrane permeability improvements under ultrasonic vibration. Fouling visualisation using Scanning Electron Microscopy revealed that ultrasound effectively removed membrane fouling without compromising the membrane's structure. Importantly, permeate flux improvements with targeted low-power ultrasound appears to be proportionally higher than those of high-power ultrasound applied to the whole system, on a flux improvement per ultrasound W/m2 basis.
dc.description.sponsorshipThe authors would like to acknowledge the financial support received from the University of Southern Queensland and the technical discussion with filtration professionals from FILPURE water filtration systems, Australia.
dc.publisherElsevier BV
dc.relation.urlhttps://linkinghub.elsevier.com/retrieve/pii/S1383586621000216
dc.rightsNOTICE: this is the author’s version of a work that was accepted for publication in Separation and Purification Technology. 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 Separation and Purification Technology, [262, , (2021-01-18)] DOI: 10.1016/j.seppur.2021.118319 . © 2021. 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.titlePower effect of ultrasonically vibrated spacers in air gap membrane distillation: Theoretical and experimental investigations
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.journalSeparation and Purification Technology
dc.rights.embargodate2023-01-18
dc.eprint.versionPost-print
dc.contributor.institutionWater and Environmental Engineering Research Group, Department of Built Environment, Aalto University, P.O. Box 15200, Aalto FI-00076, Espoo, Finland
dc.contributor.institutionFaculty of Health, Engineering and Sciences, University of Southern Queensland, Toowoomba, QLD 4350, Australia
dc.contributor.institutionCentre for Technologies for Water and Wastewater, School of Civil and Environmental Engineering, University of Technology Sydney, 15 Broadway, NSW, 2007
dc.identifier.volume262
dc.identifier.pages118319
kaust.personAlpatova, Alla
kaust.personSoukane, Sofiane
kaust.personGhaffour, Noreddine
dc.date.accepted2021-01-06
dc.identifier.eid2-s2.0-85099628637
refterms.dateFOA2021-01-28T08:31:43Z


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