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AuthorKhanafer, Daoud
AuthorYadav, Sudesh
AuthorGanbat, Namuun
AuthorAltaee, Ali
AuthorZhou, John
AuthorHawari, Alaa H.
Available date2023-05-23T09:39:16Z
Publication Date2021
Publication NameWater (Switzerland)
ResourceScopus
URIhttp://dx.doi.org/10.3390/w13091245
URIhttp://hdl.handle.net/10576/43386
AbstractAn osmotically driven membrane process was proposed for seawater pretreatment in a multi-stage flashing (MSF) thermal plant. Brine reject from the MSF plant was the draw solution (DS) in the forward osmosis (FO) process in order to reduce chemical use. The purpose of FO is the removal of divalent ions from seawater prior the thermal desalination. In this study, seawater at 80 g/L and 45 g/L concentrations were used as the brine reject and seawater, respectively. The temperature of the brine reject was 40 °C and of seawater was 25 °C. Commercial thin-film composite (TFC) and cellulose triacetate (CTA) membranes were evaluated for the pretreatment of seawater in the FO and the pressure-assisted FO (PAFO) processes. Experimental results showed 50% more permeation flux by increasing the feed pressure from 1 to 4 bar, and permeation flux reached 16.7 L/m2h in the PAFO process with a TFC membrane compared to 8.3 L/m2h in the PAFO process with CTA membrane. TFC membrane experienced up to 15% reduction in permeation flux after cleaning with DI water while permeation flux reduction in the CTA membrane was >6%. The maximum recovery rate was 11.5% and 8.8% in the PAFO process with TFC and CTA membrane, respectively. The maximum power consumption for the pretreatment of seawater was 0.06 kWh/m3 and 0.1 kWh/m3 for the PAFO process with a TFC and CTA membrane, respectively.
SponsorAcknowledgments: This publication was supported by NPRP grant 10-0117-170176 from the Qatar National Research Fund (a member of Qatar Foundation).
Languageen
PublisherMDPI AG
SubjectDesalination
FO-MSF hybrid system
Forward osmosis (FO)
Membrane filtration
Pressure assisted FO (PAFO)
TitlePerformance of the pressure assisted forward osmosis-msf hybrid desalination plant
TypeArticle
Issue Number9
Volume Number13
dc.accessType Open Access


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