Recovery of sludge produced from Ti-salt flocculation as pretreatment to seawater reverse osmosis

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dc.contributor.author Okour, Y
dc.contributor.author El Saliby, I
dc.contributor.author Shon, HK
dc.contributor.author Vigneswaran, S
dc.contributor.author Kim, J-H
dc.contributor.author Cho, J
dc.contributor.author Kim, IS
dc.date.accessioned 2010-05-28T09:47:55Z
dc.date.issued 2009-10
dc.identifier.citation Desalination, 2009, 247 (1-3), pp. 53 - 63
dc.identifier.issn 0011-9164
dc.identifier.other C1 en_US
dc.identifier.uri http://hdl.handle.net/10453/9170
dc.description.abstract In this study, titanium tetrachloride (TiCl4), titanium sulfate (Ti(SO4)2) and ferric chloride (FeCl3) flocculation as a pretreatment to seawater reverse osmosis (SWRO) were investigated. Their ability to remove turbidity, seawater organic matter (SWOM) and controlling the feed water quality of SWRO was evaluated. Flux decline of SWRO and membrane autopsy were studied. Titanium dioxide (TiO2) produced from sludge after Ti-salt fl occulation was characterized in terms of particle structure and photocatalytic activity. A hybrid system of fl occulation followed by granular activated carbon (GAC) filtration was employed to remove the suspended micro-flocs after diff erent fl occulations. The optimum dose of 10 mg/L TiCl4 and FeCl3 were used. The turbidity removal for the three coagulants was marginal at different doses at pH 6 and 8. Flocculation followed by GAC fi ltration signifi cantly reduced the turbidity values from 1.5 NTU to about 0.35 NTU using TiCl4 and 0.40 using FeCl3. Silt density index (SDI15) was also decreased from 5.0 to 4.2 and 4.7, respectively. Removal of dissolved organic carbon (DOC), colour and UV absorbance after TiCl4 and FeCl3 flocculation followed by GAC fi ltration was found to be eff ective and similar. TiO2 produced from sludge showed very high photocatalytic activity under UV-irradiation. Acetaldehyde was completely removed after 45 min photocatalytic reaction. © 2009.
dc.language eng
dc.relation.isbasedon 10.1016/j.desal.2008.12.012
dc.title Recovery of sludge produced from Ti-salt flocculation as pretreatment to seawater reverse osmosis
dc.type Journal Article
dc.parent Desalination
dc.journal.volume 1-3
dc.journal.volume 247
dc.journal.number 1-3 en_US
dc.publocation Netherlands en_US
dc.identifier.startpage 53 en_US
dc.identifier.endpage 63 en_US
dc.cauo.name FEIT.Faculty of Engineering & Information Technology en_US
dc.conference Verified OK en_US
dc.for 0915 Interdisciplinary Engineering
dc.personcode 900451
dc.personcode 995130
dc.personcode 10671600
dc.personcode 103883
dc.percentage 100 en_US
dc.classification.name Interdisciplinary Engineering en_US
dc.classification.type FOR-08 en_US
dc.edition en_US
dc.custom en_US
dc.date.activity en_US
dc.location.activity en_US
dc.description.keywords Filtration
dc.description.keywords Flocculation
dc.description.keywords Organic matter
dc.description.keywords Photocatalytic activity
dc.description.keywords Pretreatment
dc.description.keywords Sludge recovery
dc.description.keywords Titanium dioxide (TiO2)
pubs.embargo.period Not known
pubs.organisational-group /University of Technology Sydney
pubs.organisational-group /University of Technology Sydney/Faculty of Engineering and Information Technology
pubs.organisational-group /University of Technology Sydney/Faculty of Engineering and Information Technology/School of Civil and Environmental Engineering
pubs.organisational-group /University of Technology Sydney/Strength - Technology in Wastewater Treatment
utslib.copyright.status Closed Access
utslib.copyright.date 2015-04-15 12:17:09.805752+10
pubs.consider-herdc true
utslib.collection.history Closed (ID: 3)
utslib.collection.history School of Civil and Environmental Engineering (ID: 334)


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