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http://dx.doi.org/10.4491/KSEE.2014.36.7.492

Removal Characteristics of Organic Matters in Pretreatment and Reverse Osmosis Membrane Processes for Seawater Desalination  

Kim, Dong-Kwan (Kumoh National Institute Technology)
Choi, June-Seok (Korea Institute of Construction Technology)
Lee, Chang-Kyu (Korea Institute of Construction Technology)
Kim, Jinho (Econity Co., Ltd.)
Choi, Jeong-Hak (Catholic University of Pusan)
Lee, Wontae (Kumoh National Institute Technology)
Publication Information
Journal of Korean Society of Environmental Engineers / v.36, no.7, 2014 , pp. 492-497 More about this Journal
Abstract
This study investigated removal characteristics of organic matters in pretreatment and reverse osmosis (RO) membrane processes for seawater desalination. Also, the influence of the changes in characteristics of organic matters on the membrane fouling was assessed. The pretreatment processes included dual media filtration (DMF), pressurized membrane filtration (MF), and submerged membrane filtration (SMF). Turbidity, UV absorption at 254 nm, dissolved organic carbon, size exclusion chromatography (SEC), fluorescence excitation emission matrix (FEEM), and transparent exopolymer particles (TEP) in raw and processed waters were analyzed. Ions and minerals were not removed by any pretreatment process tested, but were removed over 99% through the RO membrane process. Hydrophobic organics, which can play major role in organic membrane fouling, were relatively readily removed compared with hydrophilic ones. Membrane based pretreatment such as MF and SMF exhibited better removals of organics than conventional DMF. As the levels of organics in pretreated water decreased, the silt density index (SDI) decreased. MF treated water exhibited the lowest SDI value; this is possibly due to the lowest TEP ($0.1-0.4{\mu}m$) concentrations.
Keywords
Desalination; Pretreatment; Microfiltration; Media Filtration; Organic Matters; Transparent Exopolymer Particles(TEP);
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
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