Cedar Creek WWTP in Olathe, KS now has the first robust treatment system for nitrogen and phosphorus removal in the country, after a 1.5 million gallon per day (MGD) wastewater treatment facility expansion brought the hydraulic capacity of the plant to 5.25 MGD. The goal of the expansion was to reduce the frequency of wet weather discharge overflow and lower the effluent nitrogen and phosphorus concentrations through biological nutrient removal (BNR).
Xylem – Flygt submersible mixers and a Sanitaire Fine Bubble Aeration system were used in a new five-stage BNR biological process to remove nitrogen and phosphorous. Sanitaire’s coarse-bubble aeration system and Flygt PP pumps were used in this multi-step treatment process.
Key highlights of Olathe, KS WWTP Upgrade:
- Capacity: Increase design from 1.5 MGD to 5.25 MGD
- Consulting Engineer: Black & Veatch
- Contractor: Garney (Grimm) Construction
- Ribbon cutting: November 1, 2013
- Energy Savings: implementing fine bubble diffused aeration system
- Designed for Low effluent Nitrogen & Phosphorus: Biological nutrient removal (BNR)
- Fermenter: A key item is the WAS “fermenter” in the anaerobic zone to produce volatile fatty acids (VFA) to allow phosphorus accumulating organisms (PAO) to thrive in the anaerobic zone.
- This allows sufficient carbon sources with VFA to allow for low total nitrogen limits with denitrification and to have VFAs remain in order to meet low phosphorus limits.
- Without the fermenter, the denitrification process would compete for the VFAs and would not allow sufficient number or phosphorus accumulating organism (PAO).
- Winner of a Silver Peak Performance Award from the National Association of Clean Water Agencies (NACWA)
Other JCI Equipment Highlights:
- Siemens/Turblex Turbo Blowers with Integrally Geared Compressor
- Andritz Centrifuge, D4LL
It was featured in Kansas Rural Water Associations, The Kansas Lifeline magazine, “Olathe Expands Cedar Creek Wastewater Treatment Facility to Provide Biological Nutrient Removal”, November 2010.