EDI
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EDI OMEXELL
Electrodeionization or EDI, is a continuous and chemicalfree
process of removing ionized and ionisable 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 by eliminating
the need to store and handle hazardous chemicals used
for resin regeneration and associated waste neutralization
requirements. The patented OMEXELL™ EDI module
utilizes a spiral wound membrane (see figure below)
and ion exchange resins, sealed in a high strength (FRP)
pressure vessel. OMEXELL EDI optimizes performance,
maintains continuous product quality and can produce
up to 18 MW-cm high-purity water with high silica and
boron rejection. OMEXELL EDI is the first truly cost-effective
alternative to post-RO deionization applications. |
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OMEXELL SPIRAL WOUND EDI ADVANTAGES
High Hardness Tolerance:
The patented concentrate flow design of the OMEXELL™ EDI
moduleis unlike that of the co-current flow design used in
conventional plate and frame EDI devices. This unique flow
design makes the OMEXELL EDI modules much more resistant
to hardness scaling allowing for higher hardness concentrations
of the feed water (up to 2 ppm as CaCO3) and reducing capital |
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