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http://dx.doi.org/10.4491/KSEE.2014.36.4.251

Optimization of Coagulation and Media Filtration Process for Low Turbidity Seawater  

Son, Dong-Min (Department of Environmental Engineering, Pukyong National University)
Jo, Myeong-Heum (Department of Environmental Engineering, Pukyong National University)
Kim, Jeong-Sook (Department of Energy&Environmental Engineering, Dongseo University)
Kang, Lim-Seok (Department of Environmental Engineering, Pukyong National University)
Publication Information
Journal of Korean Society of Environmental Engineers / v.36, no.4, 2014 , pp. 251-257 More about this Journal
Abstract
This research is focused on coagulation and sand filtration process as a pretreatment of RO seawater desalination. RO systems require sufficient and reliable pretreatment process to produce superior quality of RO feedwater that can mitigate RO membrane fouling. This experiment was conducted to investigate the effectiveness of coagulation and filtration process under various experimental conditions including different coagulant dose, flocculation mixing intensity and time, turbidity, and filtration rate. The experimental results showed that the optimum pretreatment conditions resulting in lower SDI value suitable for RO feedwater were coagulation pH 6.5, raw water turbidity greater than 4 NTU, and media bed depth greater than 550 mm. However, flocculation mixing intensity, coagulant dose, and filtration rate relatively affected little on the filtration efficiency.
Keywords
Media Filtration; Seawater Desalination; Pretreatment; Coagulation; Reverse Osmosis;
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