Description
EDR-Q is a pathbreaking electrodialysis reversal technology that removes ions from a feed solution for water and non-water applications by applying a direct current and reversing the polarity of electrodes periodically. Designed for water recovery, desalination, solution concentration, and purification, EDR-Q employs state-of-the-art ion-exchange membranes to deliver exceptional consistent performance.
EDR-Q is ideally suited to applications including whey demineralization, high-grade protein separation, acid-alkali recovery, lithium concentration, among others. It ensures high purity and resource recovery beyond traditional water treatment applications such as brackish water desalination, zero liquid discharge (ZLD) systems, and industrial water & wastewater treatment.
Each EDR-Q stack is delivered on a modular basis, with a compact footprint to cater small to larger flow at high recovery rate for different industrial applications with reduced energy needs.
Low Fouling & Stable Performance
Reduced scaling and fouling due to periodic polarity reversal, resulting in more consistent purity in the long term with reduced maintenance and downtime.
Highly Energy-Efficient
EDR-Q is highly energy-efficient for low to medium salinity water (TDS 1,000–10,000 mg/L).
Optimized OPEX
Reduced chemical needs due to self-cleaning, long membrane life, and power savings result in low operating costs.
Robust Treatment
Handles high turbidity, SDI, silica, oil & grease, and other challenging water conditions.
High Recovery
Achieve up to 95% water recovery.
Reliable Operation
Thin spacer design prevents membrane contact, short circuits, and salt leakage.
How Does EDR-Q™ Work?
An electrodialysis reversal (EDR) stack is comprised of alternating anion- and
cation-selective membranes placed between anode (+) and cathode (–) electrodes
and secured with end plates. When direct current (DC) is applied, dissolved
salts are driven through the ion-exchange membranes, effectively separating
the feed solution into low- and high-salinity streams.
Over time, conventional systems experience scaling and fouling on the membrane
surfaces, requiring frequent cleaning. EDR addresses these challenges with
automatic polarity reversal, which periodically reverses ion transfer direction
and simultaneously performs in-situ membrane cleaning with reduced acid and
base consumption—ensuring efficient, stable, and high-recovery operation.
