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http://dx.doi.org/10.4491/KSEE.2013.35.7.495

Evaluation of Coagulation-UF Process Considering Residual Aluminuim Concentration as Seawater Desalination Pretreatment  

Son, Dong-Min (Department of Environmental Engineering, Pukyong National University)
Kang, Lim-Seok (Department of Environmental Engineering, Pukyong National University)
Publication Information
Journal of Korean Society of Environmental Engineers / v.35, no.7, 2013 , pp. 495-502 More about this Journal
Abstract
This work was performed to investigate proper condition of coagulation treatment as UF process pretreatment that consider UF permeate flux and residual Al concentration. The coagulant used an alum as $Al_2(SO_4)_3{\cdot}16H_2O$ and PACl (r = 1.5) made this study. The experiment was tested in adjusting conditions such as alum dose, flocculation time and coagulation pH of seawater. Consequently, higher coagulant dose lead to elevation of UF permeate flux while residual aluminium also increased in condition of pH 8.0. The most suitable condition which has a good permeate flux and low residual aluminium, in this works, was coagulant dose of 0.7 mg/L (as Al, alum) and 1.2 mg/L (as Al, PACl) and coagulation pH 6.5. In addition, applying the flocculation time with 1.2 mg/L of PACI reduced. The flocculation time reduced UF permeate flux in using alum.
Keywords
Residual Aluminium; Coagulation; Ultra Filtration; Seawater; Pretreatment;
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