One upgrade worth evaluating when ion exchange efficiency drops is electrodeionization (EDI) as a post-RO polishing step. Unlike mixed-bed IX, EDI regenerates continuously using only DC current - no acid/caustic cycling, no batch downtime, no on-site chemical storage. Feed-water must be properly pre-treated RO permeate; the leading cause of EDI underperformance in the field is dissolved CO₂ in the feed overwhelming the resin. Full breakdown of how it works, pros vs. cons, and limitations: https://www.purecowater.com/e-cell-electrodeionization-edi/
Published by Rick Thomas
One upgrade worth evaluating when ion exchange efficiency drops is electrodeionization (EDI) as a post-RO polishing step. Unlike mixed-bed IX, EDI regenerates continuously using only DC current - no acid/caustic cycling, no batch downtime, no on-site chemical storage. Feed-water must be properly pre-treated RO permeate; the leading cause of EDI underperformance in the field is dissolved CO₂ in the feed overwhelming the resin. Full breakdown of how it works, pros vs. cons, and limitations: https://www.purecowater.com/e-cell-electrodeionization-edi/