Advanced electrodialysis reversal system

FlexEDR is an advanced electrodialysis reversal (EDR) system, leveraging our next-generation ion exchange membranes. It requires less pre-treatment, tolerates oils and organics, selectively removes ions and uses fewer chemicals.

For the Most Rugged Applications

  • Built with our robust, highly ductile IonFlux ion exchange membranes.
  • Intelligent automation self-cleans and maintains peak performance.
  • Modular skids for easy deployment and project integration.
  • Less pre-treatment: operate with oils, organics, particles < 20 μm
  • No chemical softening: patented electrode protection blocks hardness out of EDR electrolyte, so you do not need to remove it before treatment.
FlexEDR Electrodialysis Reversal Stack Inside a Saltworks Technologies Pilot Plant
Play Video about Monovalent electrodialysis stack

FlexEDR Organix:

Desalt Organic Wastewater & Produced Water


  • Treat oily wastewaters that swell conventional membranes with our next-generation IonFlux membranes.
  • Reduce the need for complex pre-treatment when you only need to remove salt.
  • Remove more oil and lower consumption of polymers in enhanced oil recovery (EOR) by desalinating produced water.

FlexEDR Selective:

Remove Ions with Game-Changing Selectivity


  • Conventional EDR pulls all ions across ion exchange membranes under an electric field, without membrane pressure differential.
  • Remove specific ions using state-of-the-art ion exchange membranes with 98% monovalent ionic selectivity (i.e. remove lithium, separate chlorides from sulfates).
  • Change brine chemistry without softening to reach the full potential of your RO system and wring out even more freshwater for beneficial reuse.
  • Concentrate brine to low volumes with membranes – territory previously reserved for evaporative systems.
FlexEDR E150 Stack with Transparent Background
Photo of a FlexEDR stack in a full-scale plant with a Saltworks Engineer

FlexEDR™ Services:

Maximize Your FlexEDR Investment


  • Saltworks provides a full suite of FlexEDR™ services to help you achieve the optimal solution for industrial desalination, brine treatment, volume reduction, and chemical recovery applications.
  • Initial consulting and technical advice to understand treatment options, residuals management, and balancing capital and operating costs.
  • Process design for maximum recovery and optimal integration with your other treatment process.
  • Engineering and design services to build and quality assure your full-scale plant.
  • Bench and pilot testing services, including mobile systems for rapid on-site deployment.
  • Comprehensive support including testing and remote monitoring.
  • R&D capability for unique applications.

Looking for more in-depth knowledge on electrodialysis reversal? Learn exactly what EDR is and about its new innovations. 


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