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dc.contributor.authorLee, Jung Gil
dc.contributor.authorJang, Yongsun
dc.contributor.authorFortunato, Luca
dc.contributor.authorJeong, Sanghyun
dc.contributor.authorLee, Sangho
dc.contributor.authorLeiknes, TorOve
dc.contributor.authorGhaffour, NorEddine
dc.date.accessioned2017-10-17T11:47:39Z
dc.date.available2017-10-17T11:47:39Z
dc.date.issued2017-10-12
dc.identifier.citationLee J-G, Jang Y, Fortunato L, Jeong S, Lee S, et al. (2017) An advanced online monitoring approach to study the scaling behavior in direct contact membrane distillation. Journal of Membrane Science. Available: http://dx.doi.org/10.1016/j.memsci.2017.10.009.
dc.identifier.issn0376-7388
dc.identifier.doi10.1016/j.memsci.2017.10.009
dc.identifier.urihttp://hdl.handle.net/10754/625884
dc.description.abstractOne of the major challenges in membrane distillation (MD) desalination is scaling, mainly CaSO4 and CaCO3. In this study, in order to achieve a better understanding and establish a strategy for controlling scaling, a detailed investigation on the MD scaling was performed by using various analytical methods, especially an in-situ monitoring technique using an optical coherence tomography (OCT) to observe the cross-sectional view on the membrane surface during operation. Different concentrations of CaSO4, CaCO3, as well as NaCl were tested separately and in different mixed feed solutions. Results showed that when CaSO4 alone was employed in the feed solution, the mean permeate flux (MPF) has significantly dropped at lower volume concentration factor (VCF) compared to other feed solutions and this critical point was observed to be influenced by the solubility changes of CaSO4 resulting from the various inlet feed temperatures. Although the inlet feed and permeate flow rates could contribute to the initial MPF value, the VCF, which showed a sharp MPF decline, was not affected. It was clearly observed that the scaling on the membrane surface due to crystal growth in the bulk and the deposition of aggregated crystals on the membrane surface abruptly appeared close to the critical point of VCF by using OCT observation in a real time. On the other hand, NaCl + CaSO4 mixed feed solution resulted in a linear MPF decline as VCF increases and delayed the critical point to higher VCF values. In addition, CaCO3 alone in feed solution did not affect the scaling, however, when CaSO4 was added to CaCO3, the initial MPF decline and VCF met the critical point earlier. In summary, calcium scaling crystal formed at different conditions influenced the filtration dynamics and MD performances.
dc.description.sponsorshipThe research reported in this paper was supported by King Abdullah University of Science and Technology (KAUST), SaudiArabia. The authors acknowledge help, assistance and support from the Water Desalination and Reuse Center (WDRC) staff. This research was also supported by a grant (Code 17IFIP-B065893-05) from Industrial Facilities & Infrastructure Research Program funded by Ministry of Land, Infrastructure and Transport of Korean government.
dc.publisherElsevier BV
dc.relation.urlhttp://www.sciencedirect.com/science/article/pii/S0376738817320859
dc.rightsNOTICE: this is the author’s version of a work that was accepted for publication in Journal of Membrane Science. 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 Journal of Membrane Science, 6 October 2017. DOI: 10.1016/j.memsci.2017.10.009. © 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/
dc.subjectCalcium sulfate
dc.subjectMean permeate flux
dc.subjectMembrane distillation
dc.subjectOptical coherence tomography (OCT)
dc.subjectScaling
dc.titleAn advanced online monitoring approach to study the scaling behavior in direct contact membrane distillation
dc.typeArticle
dc.contributor.departmentBiological and Environmental Sciences and Engineering (BESE) Division
dc.contributor.departmentEnvironmental Science and Engineering Program
dc.contributor.departmentWater Desalination and Reuse Research Center (WDRC)
dc.identifier.journalJournal of Membrane Science
dc.eprint.versionPost-print
dc.contributor.institutionSchool of Civil and Environmental Engineering, Kookmin University, Jeongneung-Dong, Seongbuk-Gu, Seoul, 136-702, Republic of Korea
dc.contributor.institutionGraduate School of Water Resources, Sungkyunkwan University, 2066 Seobu-ro, Jangan-Gu, Suwon, Gyeonggi-Do, 16419, Republic of Korea
kaust.personLee, Jung Gil
kaust.personFortunato, Luca
kaust.personJeong, Sanghyun
kaust.personLeiknes, TorOve
kaust.personGhaffour, Noreddine
refterms.dateFOA2019-10-06T00:00:00Z
dc.date.published-online2017-10-12
dc.date.published-print2018-01


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