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dc.contributor.authorLi, Sheng
dc.contributor.authorKim, Youngjin
dc.contributor.authorChekli, Laura
dc.contributor.authorPhuntsho, Sherub
dc.contributor.authorShon, Ho Kyong
dc.contributor.authorLeiknes, TorOve
dc.contributor.authorGhaffour, NorEddine
dc.date.accessioned2017-06-05T06:02:24Z
dc.date.available2017-06-05T06:02:24Z
dc.date.issued2017-05-31
dc.identifier.citationLi S, Kim Y, Chekli L, Phuntsho S, Shon HK, et al. (2017) Impact of reverse nutrient diffusion on membrane biofouling in fertilizer-drawn forward osmosis. Journal of Membrane Science 539: 108–115. Available: http://dx.doi.org/10.1016/j.memsci.2017.05.074.
dc.identifier.issn0376-7388
dc.identifier.doi10.1016/j.memsci.2017.05.074
dc.identifier.urihttp://hdl.handle.net/10754/624036
dc.description.abstractBiofouling in fertilizer-drawn forward osmosis (FDFO) for water reuse was investigated by spiking pure bacteria species Pseudomonas aeruginosa PAO1+GFP and using three different fertilizers KNO3, KCl and KH2PO4 as draw solutions. The performance of FO process for treating synthetic wastewater was assessed and their influence on the membrane fouling and in particular biofouling was evaluated relative to the type of different fertilizers used and their rates of reverse diffusion. FO performances using KNO3 as draw solute exhibited severer flux decline (63%) than when using KCl (45%) and KH2PO4 (30%). Membrane autopsy indicated that the mass of organic foulants and biomass on fouled membrane surface using KNO3 as draw solute (947.5mg/m2 biopolymers, 72µm biofilm thickness and 53.3mg/m2 adenosine triphosphate) were significantly higher than that using KCl (450mg/m2 biopolymers, 33µm biofilm thickness and 28.2mg/m2 ATP) and KH2PO4 (440mg/m2 biopolymers, 35µm biofilm thickness and 33.5mg/m2 ATP). This higher flux decline is likely related to the higher reverse diffusion of KNO3 (19.8g/m2/h) than KCl (5.1g/m2/h) and KH2PO4 (3.7g/m2/h). The reverse diffused potassium could promote the organics and bacterial adhesion on FO membrane via charge screening effect and compression of electrical double layer. Moreover, reverse diffused nitrate provided increased N:P nutrient ratio was favorable for the bacteria to grow on the feed side of the FO membrane.
dc.description.sponsorshipThe research reported in this paper was supported from the SEED program of King Abdullah University of Science and Technology (KAUST), Saudi Arabia, ARC Future Fellowship (FT140101208) and University of Technology Sydney (UTS) chancellor's postdoctoral research fellowship. The help, assistance and support of the Water Desalination and Reuse Center (WDRC) staff are greatly appreciated.
dc.publisherElsevier BV
dc.relation.urlhttp://www.sciencedirect.com/science/article/pii/S0376738816318890
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, [, , (2017-05-31)] DOI: 10.1016/j.memsci.2017.05.074 . © 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.subjectForward osmosis
dc.subjectFertilizer
dc.subjectReverse diffusion
dc.subjectBiofouling
dc.subjectWater reuse
dc.titleImpact of reverse nutrient diffusion on membrane biofouling in fertilizer-drawn forward osmosis
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, University of Technology, Sydney (UTS), Post Box 129, Broadway, NSW 2007, Australia
dc.contributor.institutionSchool of Civil, Environmental and Architectural Engineering, Korea University, 1-5 Ga, Anam-Dong, Seongbuk-Gu, Seoul, 136-713, Republic of Korea
kaust.personLi, Sheng
kaust.personLeiknes, TorOve
kaust.personGhaffour, Noreddine
refterms.dateFOA2019-05-31T00:00:00Z
dc.date.published-online2017-05-31
dc.date.published-print2017-10


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