The city of Columbus has operated a treatment works at the Jackson Pike site since the 1910s. The activated sludge treatment plant was commissioned in 1937, when chlorine gas was used to treat the wastewater.  Although this method worked well, the city decided to change disinfection treatment methods and started using a sodium hypochlorite feed system in 2000.

Download the complete article (Reprinted with revisions to format, from the September 2005 edition of WATERWORLD.  Copyright 2005 by PennWell Corporation)

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