GE, Electrodeionization EDI-modules

In semiconductor fabrication, the use of reverse osmosis (RO) is considered essential to achieve the
purity levels necessary for wafer production.

In power plants, increased recognition of the effect of ultrapure water quality on system component life has resulted in demand for membrane systems which can render an even higher purity of water than mixed-bed deionization systems alone can achieve (e.g. lower TOC, particles, etc.). Such high levels of demineralization can be obtained using electrodeionization (EDI). EDI combines ionexchange resins, ion-exchange membranes, and a direct (DC) electric field. Basically, EDI is an electrodialysis (ED) process modified by the addition ofion-exchange resin. When EDI is used for the production of high purity water, the ion-exchange resin beads enhance mass transfer, facilitate water splitting, and reduce stack resistance.

The ionexchange resin exchanges ions with the incoming feed stream. The DC electrical field splits water into hydrogen and hydroxyl ions, which, in turn, continuously regenerate the ion-exchange resins. The exchanged ions are transferred through the membranes to the brine stream and flushed from the system.1,2 Compared to conventional ion exchange, EDI has the advantage of being a continuous process with constant stable product quality, which is able to produce ultra high purity water without the need for acid or caustic regeneration.

Part number	Model Name	Replaced by

3063891	GE-ECell-3XHH

	GE-ECell-3X

	GE-E-Cell

3019185	GE-E-Cell-MK-2E	MK-3

3019189	GE-E-Cell-MK-2ST	MK-3

3019226	GE-E-Cell-MK-2-MiniHT	MK-3MiniHT

	GE-E-Cell-MK-3-1-12

	GE-E-Cell-MK-3-15-27

	GE-ECell-MK-3

	GE-ECel-lMK-3MiniHT

3018627	GE-ECel-lMK-3Mini	MK-3MiniHT

	GE-ECell-MK3PharmHT

3020056	GE-ECell-MK3Pharm

	GE-E-Cell-PharmHT

	GE-E-FSpwE-Cell-MK-3-1to12

	GE-E-FSpwE-Cell-MK-3-15to27

	GE-E-FSroPRO-E-Cell

	GE-Electromat

	GE-FSelE-Cell-3XHHStack

	GE-FSelE-Cell-3XStack

	GE-FSelE-Cell-3XStandard-1to12

3019185	GE-MK-2E	MK-3
3019231	GE-MK-2Mini

3019226	GE-MK-2MiniHT	MK-3MiniHT

3019225	GE-MK-2PharmHT	MK-3PharnHT

3019230	GE-MK-2Pharm	MK-3PharnHT

	GE-WasteWizard



NOTE:	MK-2 line and MK-3 line stacks cannot operate on the same system together due to operational differences. All MK-2 line stacks on a system must be replaced with their corresponding MK-3 stacks. At sites with multiple E-Cell systems , the switch from MK-2 line to MK-3 line stacks can be done one system at a time , consolidating MK-2 line stacks onto remaining systems for a gradual changeover.