The equipment supply will consist of a state-of- the-art design including the ACTIFLO®, ACTIFLO® CARB and Kruger Ceramic Membrane (KCM). The Rueter-Hess Reservoir (RHR) will serve the District's ongoing water needs and solve its long-term water shortage problem. The reservoir will be located about three miles southwest of downtown Parker on Newlin Gulch, which is a tributary drainage of Cherry Creek. The dam will rise 185 feet and the reservoir will encompass 1,170 acres.
RHR employs a water management system that captures surface water, which normally would be lost downstream. Reservoir water will be used by residents for everyday water needs, to replenish the underground aquifer, and as a reserve for better water management during a drought. Rueter-Hess will help maintain precious water resources while providing a safe and affordable water supply for the future. RHR is estimated for completion in 2010 and anticipated to begin filling in 2011.
Kruger worked with the PWSD's engineer Integra Engineering on the design, evaluation, and selection phases of the project. The new water treatment plant will be constructed to treat the RHR water and will initially operate seasonally for irrigationpurposes.
Kruger'sOpaline(s) process was selected as the preferred process due to its flexibility and ability to produce a higher quality of water. The Opaline process also allows PWSD to meet the requirements of the future in regards to the new safe drinking regulations.
The Opalineprocess will utilize a three stage design, which includes enhanced coagulation through ACTIFLO®, PAC contact throughACTIFLO® CARB, and microfiltration through KCM.
The ACTIFLO® Process is a proven, high performance, compact clarification system that utilizes micro-sand enhanced flocculation and settling. The first stage ACTIFLO® will consist of Kruger's latest R&D developments reflecting a draft tube in the maturation zone allowing for optimum mixing.
The second stage ACTIFLO® (ACTIFLO® CARB) will utilize a powdered activated carbon (PAC) recirculation system meant to remove natural organic matter in the form of DOC to minimize disinfection-byproduct (DBP) formation. The activated carbon slurry is a onetime charge into the system and is recycled within the process to maximize feed-water contact while minimizing the fresh PAC dose.
The final stage is the KCM technology which employs state-of-the-art ceramic membranes capable of supplying safe water because of its mechanicalstrength and uniform pore size. The membrane employs monolithic internal pressure-type ceramic membrane elements, each with 269 ftof membrane surface area. The ceramic membrane elements supplied by METAWATER have been employed in over 70 installations. Each element offers microfiltration through 0.1 µm size pores that completely removes impurities such as turbidity, E-coli bacteria and cryptosporidium (pathogenic protozoa) contained in raw water. Combination with coagulation provides the opportunity for additional organic removal while maintaining reliable performance under varying conditions.
Jim Nikkel, P.E., the Assistant Director of Parker WSD, states, "after much research and pilot testing, Parker chose the Opaline system in conjunction with KCM based upon performance, reduction of organics and therefore decreased DBP formation, and lower life cycle costs".