Challenge

The OMNIFLO® Sequencing Batch Reactor (SBR) replaced an existing plant that included three trickling filters and three polishing lagoons that were no longer meeting permit requirements.

Solution

In order to meet their requirements, Park City selected the OMNIFLO® SBR System which includes the following:

• Two 0.475 million gallon reactors with a VARI-CANT® jet aeration system.
• Solids-excluding floating decanters from Siemens
• State-of-the-art controls
• Two 0.13 million gallon aerated digesters with coarse bubble diffusers
• Ultraviolet disinfection and a post equalization basin between the reactors and the UV channel
• An aerated grit chamber and mechanical bar screen. 

All the influent flow is pumped to this faculty with the effluent flowing by gravity over cascade re-aeration at the outfall.  

Results

The plant was started up in January of 1994.  With the flexibility of the OMNIFLO® SBR, it allowed the operator to vary the top and bottom water levels, settle times, and to add an anoxic mixing stage, the plant has been able to overcome the shortage of sludge storage capacity.  By installing the OMNIFLO® SBR system, the Park City plant has been able to maintain a flexible and efficient wastewater treatment facility. 

Average Design Flow:    1.08   MGD

Average Actual Flow:     0.613 MGD 

* The permitted weekly average ammonia levels vary   seasonally from 2.0 - 9.0 mg/l

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