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dc.contributor.authorWang, Yiran*
dc.contributor.authorFortunato, Luca*
dc.contributor.authorJeong, Sanghyun*
dc.contributor.authorLeiknes, TorOve*
dc.date.accessioned2017-04-30T10:16:59Z
dc.date.available2017-04-30T10:16:59Z
dc.date.issued2017-04-21en
dc.identifier.citationWang Y, Fortunato L, Jeong S, Leiknes T (2017) Gravity-driven membrane system for secondary wastewater effluent treatment: Filtration performance and fouling characterization. Separation and Purification Technology 184: 26–33. Available: http://dx.doi.org/10.1016/j.seppur.2017.04.027.en
dc.identifier.issn1383-5866en
dc.identifier.doi10.1016/j.seppur.2017.04.027en
dc.identifier.urihttp://hdl.handle.net/10754/623290
dc.description.abstractGravity-driven membrane (GDM) filtration is one of the promising membrane bioreactor (MBR) configurations. It operates at an ultra-low pressure by gravity, requiring a minimal energy. The objective of this study was to understand the performance of GDM filtration system and characterize the biofouling formation on a flat sheet membrane. This submerged GDM reactor was operated at constant gravitational pressure in treating of two different concentrations of secondary wastewater effluent. Morphology of biofilm layer was acquired by an in-situ and on-line optical coherence tomography (OCT) scanning in a fixed position at regular intervals. The thickness and roughness calculated from OCT images were related to the variation of flux, fouling resistance and permeate quality. At the end of experiment, fouling was quantified by total organic carbon (TOC) and adenosine tri-phosphate (ATP) method. Confocal laser scanning microscopy (CLSM) was also applied for biofouling morphology observation. The biofouling formed on membrane surface was mostly removed by physical cleaning confirmed by contact angle measurement before and after cleaning. This demonstrated that fouling on the membrane under ultra-low pressure operation was highly reversible. The superiority and sustainability of GDM in both flux maintaining and long-term operation with production of high quality effluent was demonstrated.en
dc.description.sponsorshipThis study was supported by funding from King Abdullah University of Science and Technology (KAUST).en
dc.publisherElsevier BVen
dc.relation.urlhttp://www.sciencedirect.com/science/article/pii/S1383586616320585en
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, [, , (2017-04-21)] DOI: 10.1016/j.seppur.2017.04.027 . © 2017. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/en
dc.subjectBiofoulingen
dc.subjectfoulingen
dc.subjectgravity-driven membrane filtrationen
dc.subjectoptical coherence tomographyen
dc.subjectsecondary wastewater effluenten
dc.titleGravity-driven membrane system for secondary wastewater effluent treatment: Filtration performance and fouling characterizationen
dc.typeArticleen
dc.contributor.departmentBiological and Environmental Sciences and Engineering (BESE) Division*
dc.contributor.departmentWater Desalination and Reuse Research Center (WDRC)*
dc.identifier.journalSeparation and Purification Technologyen
dc.eprint.versionPost-printen
kaust.authorWang, Yiran*
kaust.authorFortunato, Luca*
kaust.authorJeong, Sanghyun*
kaust.authorLeiknes, TorOve*


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