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Cho, Jaeweon
도시환경 감각연구소/Sense Laboratory
Research Interests
  • Convergence of Science and Arts; Environment Ethics; Meta-modernism in Semantics Engineering


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

DC Field Value Language Okour, Y. ko El Saliby, I. ko Shon, H. K. ko Vigneswaran, S. ko Kim, J. -H. ko Cho, Jaeweon ko Kim, In S. ko 2015-07-02T01:23:27Z - 2015-07-01 ko 2009-10 -
dc.identifier.citation DESALINATION, v.247, no.1-3, pp.53 - 63 ko
dc.identifier.issn 0011-9164 ko
dc.identifier.uri -
dc.identifier.uri ko
dc.description.abstract In this study, titanium tetrachloride (TiCl(4)), titanium sulfate (Ti(SO(4))(2)) and ferric chloride (FeCl(3)) 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 (TiO(2)) produced from sludge after Ti-salt flocculation was characterized in terms of particle structure and photocatalytic activity. A hybrid system of flocculation followed by granular activated carbon (GAC) filtration was employed to remove the suspended micro-flocs after different flocculations. The optimum dose of 10 mg/L TiCl(4) and FeCl(3) were used. The turbidity removal for the three coagulants was marginal at different doses at pH 6 and 8. Flocculation followed by GAC filtration significantly reduced the turbidity values from 1.5 NTU to about 0.35 NTU using TiCl(4) and 0.40 using FeCl(3). Silt density index (SDI(15)) was also decreased from 5.0 to 4.2 and 4.7, respectively. Removal of dissolved organic carbon (DOC), colour and UV absorbance after TiCl(4) and flocculation followed by GAC filtration was found to be effective and similar. TiO(2) produced from sludge showed very high photocatalytic activity under UV-irradiation. Acetaldehyde was completely removed after 45 min photocatalytic reaction ko
dc.description.statementofresponsibility close -
dc.language ENG ko
dc.publisher ELSEVIER SCIENCE BV ko
dc.subject Filtration ko
dc.subject Flocculation ko
dc.subject Organic matter ko
dc.subject Photocatalytic activity ko
dc.subject Pretreatment ko
dc.subject Sludge recovery ko
dc.subject Titanium dioxide (TiO2) ko
dc.title Recovery of sludge produced from Ti-salt flocculation as pretreatment to seawater reverse osmosis ko
dc.type ARTICLE ko
dc.identifier.scopusid 2-s2.0-69349103514 ko
dc.identifier.wosid 000270634400006 ko
dc.type.rims ART ko
dc.description.wostc 7 *
dc.description.scopustc 8 * 2015-12-28 * 2015-11-04 * 2015-11-04 *
dc.identifier.doi 10.1016/j.desal.2008.12.012 ko
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