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Received June 30, 2004
Accepted October 26, 2004
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Effects of the Operating Parameters on the Reverse Osmosis-Electrodeionization Performance in the Production of High Purity Water
Department of Environmental Science and Engineering, Gwangju Institute of Science and Technology (GIST), 1 Oryong dong, Buk-gu, Gwangju 500-712, Korea
shmoon@gist.ac.kr
Korean Journal of Chemical Engineering, January 2005, 22(1), 108-114(7), 10.1007/BF02701471
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Abstract
An RO-CEDI (Reverse osmosis-continuous electrodeionization) hybrid process was investigated to produce high purity water. The RO system, with an effective membrane area of 1.1 m2, was operated using tap water with conductivity of 64 μs·cm.1, and the CEDI system experiments were carried out in a cell-pair stack consisting of 3 compartments. During the parametric study of the RO-CEDI hybrid system, the optimal operating conditions were determined based on the water purity. The electrical resistivity and water dissociation of the ion exchange resins and ion exchange membrane were verified as the key mechanisms of the CEDI system in the water purification. The produced water met the quality requirements as a make-up water in a nuclear power plant with a resistivity of 10-16.7MΩ·cm.
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Song JH, Yeon KH, Moon SH, Sep. Sci. Technol., 39, 3609 (2004)
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Yeon KH, Seong JH, Rengaraj S, Moon SH, Sep. Sci. Technol., 38(2), 443 (2003)
Yeon KH, Song JH, Moon SH, Water Res., 38, 1911 (2004)
Yeon KH, Song JH, Moon SH, Korean J. Chem. Eng., 21(4), 867 (2004)
Ganzi GC, Wood JH, Griffin CS, Environ. Prog., 11(1), 49 (1992)
Helfferich F, Ion Exchange, McGraw-Hill, New York, 422 (1962)
Kataoka T, Muto A, Nishiki T, J. Chem. Eng. Jpn., 27(3), 375 (1994)
Noh BI, Yoon TK, Moon BH, Korean J. Chem. Eng., 13(2), 150 (1996)
Song JH, Yeon KH, Moon SH, Sep. Sci. Technol., 39, 3609 (2004)
Spiegel EF, Thompson PM, Helden DJ, Doan HT, Gaspar DJ, Zanapalidou H, Desalination, 123(1), 85 (1999)
Spiegler KS, Principles of Desalination, Academic press, New York, 441 (1966)
Thate S, Specogna N, Eigenberger G, "A Comparison of Different EDI Concepts used for the production of High-purity Water", Ultrapure Water, OCTOBER, 42 (1999)
Walters WR, Weiser DW, Marek LJ, Ind. Eng. Chem., 47(1), 61 (1955)
Yeon KH, Preparation and Characterization of Ion-conducting Spacer in Continuous Electrodeionization and Their Applications in a Nuclear Power Plant", Ph.D Dissertation, Kwangju Institute of Science and Technology, South Korea (2003)
Yeon KH, Seong JH, Rengaraj S, Moon SH, Sep. Sci. Technol., 38(2), 443 (2003)
Yeon KH, Song JH, Moon SH, Water Res., 38, 1911 (2004)
Yeon KH, Song JH, Moon SH, Korean J. Chem. Eng., 21(4), 867 (2004)
