Langston University, located in Langston, Oklahoma, and TAC/Americas contracted GUERNSEY to perform an assessment, feasibility study and preliminary design for the University's water and wastewater needs. The University currently obtained its water supply from the university-owned Langston Lake and a water treatment plant owned and operated by the City of Langston. Wastewater treatment was achieved by a secondary treatment system also owned and operated by the City. The University wished to obtain a viability assessment of the existing systems to address future needs. Projected future growth of the University and continued unreliability of the City systems created concern for University officials.
The study evaluated several options to address future University growth including the potential to operate and maintain its own systems. For water supply, Langston Lake was deemed to be a reliable source of water both quantitatively and qualitatively, but the treatment system was determined inadequate to meet future requirements. Additionally, a pump test was conducted on an existing well on the LU property to determine if groundwater might provide or supplement the water supply needs. Results of the study reflected that LU could obtain an adequate supply from the lake and construct its own water treatment plant. A preliminary concept design included a new water treatment plant that included the following attributes and processes:
- Raw water pump station
- Raw water in-line detention vessel
- Raw water membrane feed pump and flow control
- Membrane treatment system
- Controls and instrumentation
- Chemical feed system
- High service pump system
|
The wastewater treatment plant was permitted to discharge to Fitzgerald Creek through a permit issued by the Oklahoma Department of Environmental Quality (ODEQ). ODEQ issued a Consent Order to the City to address a variety of needs for the plant. The City had been unable to comply with the Consent Order and the treatment plant was in violation of the Consent Order.
A new treatment plant was proposed to address the University’s needs. This plant discharges to Fitzgerald Creek and includes the following items / processes:
- Bar screen
- Influent flow measurement
- Influent pump station
- SBR, Digestion and Post Equalization
- Ultraviolet disinfection system and effluent flow monitoring
- Sludge disposal
|
GUERNSEY provided a design-build scenario and cost estimates for both systems. The University and TAC/Americas evaluated the designs and the costs to implement the two programs.
|
