Wastewater Treatment Plants

Southside Wastewater Treatment Plant
The Southside Wastewater Treatment Plant is located in southwest Tulsa. Two offsite lift stations and one onsite lift station convey influent flow to the treatment plant.

The original treatment facility was constructed and placed in operation in the 1950's. The plant consisted of influent pumping, grit removal, primary clarifiers, chlorine disinfection and anaerobic digestion. Two 10.5 mgd activated sludge treatment trains were constructed in 1972, and a third 10.5 mgd train was constructed in 1975. In 1994, a fourth activated sludge treatment train was constructed along with replacement of the bar screens at the influent lift station, two additional gravity thickeners, two additional anaerobic digesters and dechlorination facilities. In 1996, new chlorination facilities, and intermediate lift station and bioselectors were added to the plant. Offsite sludge dewatering facilities were also constructed in 1996.

The treatment plant is designed for an average flow of 42 mgd. Wastewater enters the treatment plant through a 36-inch force main from the Cherry Creek Lift Station, a 24-inch force main from the 71st Street Lift Station, and a 24-inch gravity line from Mooser Creek. Wastewater also enters the treatment plant from two 36-inch gravity sewers from the east bank of the Arkansas River. The plant liquid treatment includes offsite flow equalization, influent pumping and screening, grit removal, primary settling, intermediate pumping, an activated sludge process with bioselectors, final clarification and disinfection. The solids treatment process includes gravity thickening, sludge stabilization by anaerobic digestion, sludge dewatering, stabilized sludge storage and land application.

Northside Wastewater Treatment Plant

The Northside Wastewater Treatment Plant is located in northeast Tulsa and serves the northeast portion of the service area. Two offsite lift stations and one onsite lift station convey influent flow to the treatment plant.

The original treatment facility was constructed and placed in operation in 1958. In 1974, the plant consisted of an 8 mgd trickling filter plant. An 11 mgd parallel activated sludge plant was completed in 1978 to the north of the trickling filter facilities. In 1984, an 11 mgd mirror expansion added a second activated sludge train. The expansion also added excess flow treatment facilities. In 1987, a 21 mgd expansion added two treatment trains similar to the 1978 and 1984 activated sludge treatment facilities. In 1988, disinfection facilities were added to the 21 mgd expansion trains. After the 21 mgd expansion was completed, the trickling filter plant was taken offline and all the trickling filters were demolished. The original primary clarifiers were modified in 1995 to be used as excess flow diversion basins, and the original final clarifier is used for stormwater detention.

The treatment plant is designed for an average flow of 42.6 mgd. However, the plant's original allotted load allocation was based on only 36.8 mgd. Wastewater enters the treatment plant through a 36 inch and a 42 inch force main from the Northside Interceptor Lift Station and a 36 inch and a 42 inch force main from the Apache Lift Station. Additional influent is pumped from the Airport Lift Station through a 16 inch force main that connects to the 20 inch excess flow return force main.

The plant liquid treatment includes preliminary process screening, excess flow retention, grit removal, primary settling, and activated sludge process, final clarification and disinfection. The solids treatment process includes air floatation thickening, sludge stabilization by anaerobic digestion, stabilized sludge storage and land application.

Haikey Creek Wastewater Treatment Plant
The Haikey Creek Wastewater Treatment Plant is located in southeast Tulsa. Two offsite pump stations transport flow to the treatment plant. The treatment plant is situated on the northeast portion of a 326.7 acre site owned by the City of Tulsa.  The treatment facilities are owned by the Regional Metropolitan Utility Authority (RMUA) and are currently operated under contract by the TMUA. The plant serves the southeastern Tulsa tributary to Fry, Vensel and Haikey Creek and the Broken Arrow tributary to Haikey Creek.

The original 2.0 mgd treatment facility was constructed in 1976 with a grit tank and excess flow basin added in 1983. In 1986, the capacity was increased to 8 mgd average flow by constructing oxidation ditches, final clarifiers, an air flotation thickener and sludge holding tanks and lagoons. A chlorination/dechlorination facility was operational in 1994. As part of the 1996 sludge process improvements, gravity thickeners, dewatering facilities, lime stabilization facilities and dewatered sludge storage facilities were constructed.

In 1998, the plant was converted from the extended aeration process to the conventional activated sludge process. Additional aerators were added to the oxidation ditches, new screens were added at the grit removal facility and two additional chlorine contact basins were constructed. The additional aerators increased the treatment plant capacity from an average flow of 8 mgd to 16 mgd.

Wastewater enters the treatment plant through a 36 inch force main from the Southeast Lift Station and a 30 inch force main and a 24-inch force main from Haikey Creek Lift Station. The plant liquid treatment includes preliminary process screening, an oxidation ditch aeration process, clarification and disinfection. The solids treatment process includes gravity thickening, sludge storage, sludge dewatering, stabilized sludge storage and land application.

Lower Bird Creek Wastewater Treatment Plant

The Lower Bird Creek Wastewater Treatment Plant is located in northeast Tulsa on a bluff overlooking the Port of Catoosa. Two offsite lift stations transport flow to the treatment plant. The North and South Port Lift Stations are located in the Port of Catoosa. The treatment plant and associated lift stations were constructed in 1996.

The treatment plant is designed for an average flow of 2.0 mgd. Wastewater enters the treatment plant through a 24-inch force main from the South Port Lift Station. Liquid treatment facilities include an oxidation ditch aeration process, final clarification, disinfection and post aeration. Solids are transferred to the Northside Wastewater Treatment Plant for processing.

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