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Electrodialysis pilot (ED, EDR, RED)

The Convergence Electrodialysis (ED) is the ideal lab-scale solution for R&D or quality control purposes on Electrodialysis membranes. Convergence offers three types of systems: Electrodialysis (ED), Electrodialysis Reversal (EDR) and Reverse Electrodialysis (RED).

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Typical Specifications*

*Other configurations available on request

Electrodialysis pilot

The Convergence Electrodialysis (ED) is the ideal lab-scale solution for R&D or quality control purposes on Electrodialysis membranes. Convergence offers three types of systems: Electrodialysis (ED), Electrodialysis Reversal (EDR) and Reverse Electrodialysis (RED). The system allows highly accurate and reproducible testing. Due to its flexibility the system will fit any module or cell.

Electrodialysis (ED)

ED is an electrochemical seperation process in which dissolved solids are selectively removed. Driven by a cathode (positively charged) and an anode (negatively charged), the ions are forced through an ion exchange membrane, leaving three types of water:

  • Feed water
  • Concentrate
  • Diluate

Electrodialysis Reversal (EDR)

EDR is a very simular to ED, except that direction of ion flow is periodically reversed by polarity. This reversal helps to prevent scale formation on membranes and will allow high water recovery. EDR is used to treat brackish waters and waters with high scaling potential.

Reverse Electrodialysis (RED)

With RED ‘blue energy’ can be generated from the difference in salt concentration between sea and river water. In the procces the water runs through a stack of alternating cation exchange membranes (CEM) and anion exchange membranes (AEM). The difference in concentration generates a voltage over each membrane.

 

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