A global leading manufacturer of float and fabricated glass in Gujarat, India required high purity water for its glass cleaning process. Their water source is tertiary treated or river water, which is filtered through disc filters, and is followed by a pretreatment system that includes ultrafiltration, two pass reverse osmosis and a final polisher unit. After evaluating various demineralization options, the client selected electrodeionization as the final polishing step, because of the various advantages offered by the technology.
Electrodeionization is a continuous, chemical-free process that removes ionized and ionizable impuri-ties from the feed water using DC power. EDI is most commonly used to treat Reverse Osmosis (RO) permeate and replaces Mixed Bed (MB) ion exchange; producing high purity water of up to 18 M.cm. Fractional Electrodeionization (FEDI) is an advancement of EDI technology that was developed to address the limitations of conventional EDI.
