COLUMBUS CITY UTILITIES
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WASTEWATER TREATMENT
The Columbus Wastewater Treatment Plant is a Class IV 12.4 mgd (million gallons per day) Rotating Biological Contactor type plant with grit removal, pre-aeration, primary sedimentation, final sedimentation, phosphorus removal, nitrogen removal and chlorination.
HISTORY
The original wastewater treatment plant was placed in service in 1953. The plant used the activated sludge treatment process with a designed capacity of 5 million gallons per day. Over the ensuing years the plant has been improved and modified to reflect stricter effluent standards and community growth.
In 1968 an additional final clarifier was added as well as a chlorine contact tank:
Raw sewage pumps were replaced in 1972.
The major improvements however, o ccu rred in the mid to late seventies when the plant was converted from the activated sludge type process to the rotating biological contactors for secondary treatment.
In the 1990's improvements have been made concerning the how trash and grit is handled and disposed of.Send mail to ccu@columbusutilities.org with questions or comments about this webpage.