Electrodeionization
To prepare very pure water with its resistivity over 10 MΩ.cm on industrial scale, only ionexes columns were used until recently. One disadvantage of ionexes columns is their gradual depletion during the process. As soon as unwanted ions permeate, the water treatment process must be interrupted and ionexes regenerated. This requires handling aggressive chemicals – acids and lyes, neutralization of their surplus and subsequent elimination of highly salinated waste water.
Electrodeionization (EDI) is a separation process replacing the demineralization of water on a mixed-bed of ionexes (mixture of highly acidic catex and highly alkaline anex). The processed liquid is usually a permeate from one- or two-pass reverse osmosis (RO) or demineralised water.
In the area of the EDI process, the company MemBrain s.r.o. deals with
- development of modules (process devices) and systems,
- material research focused primarily on ion-exchange membranes and ionexes,
- searching new application opportunities, not only in the field of very pure water preparation,
- piloting technologies based on the client’s requirements
