WaterSolutions DOW Electrodeionization (EDI)

What is EDI?

Electrodeionization or EDI, is a continuous and chemical-free process of removing ionized and ionizable species from the feed water using DC power. EDI is typically used to polish reverse osmosis (RO) permeate and to replace conventional mixed bed ion exchange, which eliminates the need to store and handle hazardous chemicals used for resin regeneration and associated waste neutralization requirements.

The patented DOW™ EDI module utilizes a distinct, leak free, low maintenance spiral wound design containing membrane (see above) and ion exchange resins, sealed in a high-strength fiberglass reinforced plastic (FRP) pressure vessel. DOW™ EDI modules are designed to optimize performance, maintain continuous product quality and can produce up to 18MΩ-cm high-purity water with high silica and boron rejection.
 

DOW™ EDI Advantages

No Leakage: DOW™ EDI modules are reliably sealed with high pressure top and bottom end caps eliminating leakage problems commonly associated with plate and frame design.

Low Maintenance: Unlike plate and frame EDI systems, DOW EDI modules do not require tightening of nuts and bolts at installation or the retorquing of bolts on an ongoing basis to prevent leaks.

Light Weight Modules, Modular, Easy Access Designs:  The DOW EDI modules result in very modular systems that allow easy access and the light weight modules are easy to work with, no special lifting devices are required.  Each module comes complete with an individual permeate sample port.

Quality Control: Each DOW EDI module is performance and pressure tested prior to leaving our factory for trouble free start-up and operation.

Cost Effective: The spiral wound DOW EDI modules allow system integrators to build systems that have both lower capital and operating costs when compared to plate and frame EDI devices and is truly a cost-effective replacement for conventional mixed bed ion exchange.
 

Commitment to Quality

Our manufacturing is proudly certified as compliant to ISO 9001, an internationally recognized and accepted quality standard. We are continuously improving the effectiveness of its quality assurance and quality control processes. Our management is 100% committed to providing our employee's with the necessary resources and environment in which to carry out these goals which will enable us to meet and/or exceed our customer's requirements.