Optimization of surface water microfiltration with hydraulic and chemically enhanced backwashing

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dc.authoridBernardi, Francesca/0000-0003-4970-1601
dc.authoridOzturk, Deniz/0000-0003-4432-7833
dc.contributor.authorOzturk, Deniz
dc.contributor.authorBernardi, Francesca
dc.contributor.authorCogan, N. G.
dc.contributor.authorGupta, Kunal
dc.contributor.authorChellam, Shankararaman
dc.date.accessioned2025-03-23T19:40:54Z
dc.date.available2025-03-23T19:40:54Z
dc.date.issued2025
dc.departmentSinop Üniversitesi
dc.description.abstractShort-term microfiltration (MF) fouling is commonly abated by periodically reversing the flow to remove foulants that weakly adhered to the membrane. Strong oxidants (i.e., chlorine) can be added to hydraulic backwash water to augment its efficacy-a process called chemically enhanced backwashing (CEB). Herein, we report a rigorous mathematical model for constant flux MF incorporating hydraulic backwashing and CEB, and validate it with laboratory data obtained using untreated and alum-coagulated water from the Foss Reservoir in Oklahoma, USA. We implemented an optimal control procedure and used it to predict MF behavior long past experimental timescales. We identified a frequency threshold beyond which the necessary transmembrane pressure (TMP) reached an asymptotic value, indicating a pseudo steady-state, periodic solution to the model when coupling hydraulic backwashing with CEB. We report differences in TMP saturation values and timescales by simulating transient MF of untreated and pretreated water. Numerical simulations revealed that the operating flux could be increased 10-fold after pretreatment (compared with raw water) before reaching the maximum manufacturer-recommended pressure for the hollow-fibers. The predicted higher flux and extended duration between cleaning-in-place demonstrated advantages of coagulation pretreatment under hydraulic backwashing and CEB. Model observations could guide decision making for CEB timing and frequency.
dc.description.sponsorshipNational Science Foundation [CBET-2211001, CBET-2210992, CBET-2211035]; United States Department of Interior, Bureau of Reclamation [R18AC00064]
dc.description.sponsorshipFunding Francesca Bernardi was supported by the National Science Foundation [CBET-2211001] ; N.G. Cogan was supported by the National Science Foundation [CBET-2210992] ; Shankararaman Chellam was funded by the United States Department of Interior, Bureau of Reclamation [Agreement Number R18AC00064] and the National Science Foundation [CBET-2211035] .
dc.identifier.doi10.1016/j.memsci.2024.123550
dc.identifier.issn0376-7388
dc.identifier.issn1873-3123
dc.identifier.scopus2-s2.0-85211348525
dc.identifier.scopusqualityQ1
dc.identifier.urihttps://doi.org/10.1016/j.memsci.2024.123550
dc.identifier.urihttps://hdl.handle.net/11486/6449
dc.identifier.volume717
dc.identifier.wosWOS:001383387900001
dc.identifier.wosqualityQ1
dc.indekslendigikaynakWeb of Science
dc.indekslendigikaynakScopus
dc.language.isoen
dc.publisherElsevier
dc.relation.ispartofJournal of Membrane Science
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanı
dc.rightsinfo:eu-repo/semantics/closedAccess
dc.snmzKA_WOS_20250323
dc.subjectMicrofiltration
dc.subjectCEB
dc.subjectOptimization
dc.subjectSustainable flux
dc.titleOptimization of surface water microfiltration with hydraulic and chemically enhanced backwashing
dc.typeArticle

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