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Siemens Water Technologies Launches New Ionpure VNX-HH Electrodeionization (EDI) Module

Published: 22-Jun-2009

Siemens Water Technologies, a subsidiary of Siemens AG, has launched new Ionpure VNX-HH electrodeionization (EDI) module. The new module is an improvement in feed water hardness tolerance, to 2 parts per million (ppm) as CaCO3, a hardness level that is four times the industry standard of 0.5 ppm. This feature will provide options for treating difficult feed water, and will offer considerable capital cost savings by overcoming the need for two-pass reverse osmosis (RO) in many applications.

EDI is a simple and chemical-free process for deionizing water using a combination of selective ion exchange membranes, conductive resins, and electricity to eliminate ions from water. As a result of extensive research and development by the company, the new VNX-HH EDI module will reduce the hardness scaling potential of the water through a proprietary combination of the membranes, the resins and construction of the module. This new configuration will allow the VNX-HH modules to operate on feed water with hardness that is four times the industry standard of 0.5 ppm. For this reason, the VNX-HH module will eliminate the need for two-pass reverse osmosis (RO) in many applications.

Patrick Buzzell, EDI product manager at the company, said: "Because the VNX-HH EDI module removes the necessity for two-pass RO in the treatment train, customers can save on capital costs while simplifying their water treatment design. Now, a typical treatment train would include anti-scalant prior to a single-pass RO system, followed by the Ionpure VNX-HH module, to produce high-purity water without EDI hardness scaling."

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