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MISSION WOODS, KS -- Layne Christensen Company announced today that its Water Treatment Division has been awarded an equipment and resin supply contract by Washington Township Municipal Utilities Authority, for a "State of the Art" 4.75 MGD centralized treatment system to remove radionuclides, carbon dioxide and radon from groundwater that will be pumped and combined prior to treatment from several of the Township's wells.
The radionuclide removal process utilizes a radium selective complexer resin (DOWEX RSC) as manufactured by The Dow Chemical Company ("Dow") in a packed bed down flow pressurized adsorption system. The water from the adsorption system will be further treated to remove radon and carbon dioxide in a packed tower air stripper following which the finished water will be pH adjusted and chlorinated before distribution to the public.
The installation is the first and largest of its kind in the U.S. and arguably the world utilizing direct adsorption of low level radionuclides with DOWEX RSC resin. The decision to utilize this technology was predicated on a number of environmentally friendly engineering advancements incorporated in the plant design.
Ram Narayanan, Vice President of Layne's Water Treatment Division said, "Layne's ability to address the Authority's concern over residuals management issues and containment and recycling of fugitive liquid emissions was the driving force behind the decision to utilize Layne's operationally simple direct pump and treat RSC adsorption technology. This Zero Liquid Discharge facility incorporates sub-systems to collect, contain and recycle process liquid streams and the DOWEX RSC resin after several years of service will be disposed off site at a permitted low level radioactive disposal facility. Increasingly we are witnessing a shift to technologies that either substantially reduce or eliminate the discharge of waste residuals to the ambient environment as opposed to technologies that discharge concentrated waste residuals to the local POTW (Publicly Owned Treatment Works)."
Layne's collaboration with Dow on the application of DOWEX RSC resin for radionuclide removal technology provides for a unique blend of corporate capabilities encompassing Dow's world-class research, development and specialty chemicals manufacturing strengths with Layne's systems design and fabrication experience. This combination of technical leadership provides both companies with a strong platform for growth in this market segment.
"Dow is dedicated to solving today's toughest water remediation challenges. DOWEX RSC resin is just one of the latest resin developments being applied today to help ensure the production of the highest quality water at the lowest total cost," said Herman Motmans, global marketing manager for DOWEX ion exchange resins. "Working with world-class, cutting-edge systems designers, like Layne Christensen, assures customers that they are getting reliable solutions to their water purification needs."
Layne Christensen Company's Water Resources Division provides single source, full service capabilities encompassing expertise in geosciences, well drilling, pumping, water transmission infrastructure and groundwater treatment. The company offers advanced treatment technologies for the removal of arsenic, iron and manganese, radionuclides, perchlorate, nitrate and volatile organic contaminants.
Dow is a leader in science and technology, providing innovative chemical, plastic and agricultural products and services to many essential consumer markets.
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