High temperature electrodialysis

New components, spacers and membranes, have been developed for electrodialysis at temperatures up to 80°C. The performance of a sea water plant using these components is examined. Total water costs depend on membrane cost and membrane life. Even with conservative assumptions with regard to membrane cost and life, it appears possible to desalt sea water for less than 28ø per cubic meter (< $1.05/1000 gallons). The current status of the development and testing program is described.