3M Membrane Filtration (formerly Membrana)

TB 10: Baltimore Gas and Electric-Uses Liqui-Cel® Deoxygenators in Nuclear Power Plant


Courtesy of Courtesy of 3M Membrane Filtration (formerly Membrana)

Liqui-Cel Membrane Contactors from Hoechst Celanese Corporation are being used to deoxygenate the high purity makeup water at BG&E Calvert Cliffs Nuclear Plant in Lusby MD. Ecolochem, Inc., headquartered in Norfolk Virginia, designed, built, and now maintains the make-up water treatment system under a service contract. Ecolochem specializes in water treatment service contracts for emergency, short term and long term needs. The complete water treatment system where Liqui-Cel Membrane Contactors are incorporated is outlined below.


System Design


Ecolochem customized the makeup water system to meet the stringent make-up water quality needs of BG&E. The 100-300 gpm make-up system was installed and started up in September of 1996. The water treatment system consists of a two pass, polyamide membrane RO system, three step ion exchange polishing and a state-of-the-art deoxygenation system.


The deoxygenation system consists of three Liqui-Cel Membrane contactors.  The contactors contain thousands of microporous hollow fiber membranes. The hydrophobic membrane acts as an inert support structure that allows the gas and liquid phase to come into contact at the membrane’s pore. By altering the concentration and pressure of the gases in contact with the water, gases can be selectively dissolved or removed from the water.

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