After an evaluation period, AdEdge Water Technologies was selected in early March 2009 by the Elk Point Country Club Community (EPCCHOA) to provide a packaged treatment system for uranium removal that complied with Nevada Department of Environmental Protection (NDEP) regulations.
The EPCCHOA is located on the southeast side of Lake Tahoe at Elk Point, Nevada, and this community is served by a well that initially had a flow rate of 120 gallons per minute (gpm). The flow of the well pump was modified to obtain the specified 60 gpm design flow rate with an average uranium concentration of 40 mg/L, exceeding the U.S. EPA's maximum contaminant level (MCL) of 30 mg/L. AdEdge worked closely with an EPCCHOA engineer to provide technical support, drawings and final design of a uranium treatment solution for the community that satisfied the NDEP drinking water regulations.
The regenerative AD92 IX ion exchange approach was the preferred and most cost-effective option for this site. This technology has been designed to provide high-efficiency removal of naturally-occurring uranium from groundwater supplies using AD92 IX media, which is a strong base-anion exchange resin. The AD92 IX media can selectively remove the negatively charged uranium anion to below the state and federal MCL of 30 parts per billion (ppb). As uranium passes through the bed, it is removed allowing the chloride and bicarbonate ions to be exchanged for the uranium. In addition, AD92 IX resin provides superior regeneration efficiency and greater resistance to organic fouling.
The AdEdge AD92 pre-engineered and packaged system provided for Elk Point Country Club is composed of twin 30-inch diameter vessels with a design flow of 60 gpm in a parallel configuration. The system is controlled during normal operation, backwash and on-site regeneration using the programmable logic controller (PLC) with a control panel. The system was furnished complete with a regeneration/brine system to regenerate the IX resin periodically on demand. A sodium chloride (brine) solution is used to regenerate the anion resin. The brine module is a separate system composed of a single polyethylene brine tank with valves, flow restrictors and rotometers, which work during the automatic cycle operation, service, backwash, brining, slow rinse and fast rinse cycles.
The complete system was packaged and delivered for site installation in September 2009 and placed into full operation in early January 2010, processing about 6,000 to 8,000 gallons per day (GPD). Water samples of the treated water were taken in February 2010, and results from a state-certified lab reports excellent performance with uranium levels of less than 0.001 mg/L, or 1 ug/L.
Case Study Fast Facts
Client: Elk Point Country Club Community
Location: Elk Point, NV
Date: January 2010
Contaminant treated: Uranium
Flow Rate: 60 gpm