Electrodialysis systems use a selectively permeable membrane to move ions from one side to the other under the influence of an electric potential.
In almost all practical electrodialysis processes, multiple electrodialysis cells are arranged into a configuration called an electrodialysis stack, with alternating anion and cation exchange membranes forming the multiple electrodialysis cells.
Electrodialysis Membrane Types Available
Anionic Membrane Sheet
Anion exchange membranes contain fixed positively charged groups, such as quaternary and tertiary amines, and are paired with cationic membranes to reach the desired treatment results.
Cationic Membrane Sheet
Cation-exchange membranes contain fixed negatively charged groups, such as sulfonic and carboxylic acids, and are paired with anionic membranes to reach the desired treatment results.
Bipolar Membrane Sheet
Bipolar membranes are key in electrodialysis stacks for the recovery of acids and bases by salt splitting. Bipolar membrane is impermeable to cations and anions and strong emitter of H+ and OH− ions.
Get In Touch for More Info About DESALT Electrodialysis membranes.
For all the technical data information you can get in touch with our team. We will guide you in the selection of the most suitable electrodialysis membrane for your application.
Electrodialysis Membrane Stacks and Cells Advantages
DESALT Electrodialysis Reversal membrane stacks and cells offer superior treatment efficiency, lower fouling potential, improved system performance and reliability, and reduced maintenance and downtime.
We manufacture and design electrodialysis membrane sheets and stacks for any application. Get in touch with our team for more information.
Superior Ion Selectivity
Years in the electrodialysis industry perfectioned our ability to manufacture membranes with high ion selectivity.
DESALT Electrodialysis Membrane Technology: Improving Treatment Processes
As industries in water and wastewater treatment seek to optimize their operations, one critical aspect they often focus on is the efficiency of their electrodialysis membrane separation efficiency.
Whether it is to purify water, recover valuable materials, or remove pollutants, DESALT electrodialysis membrane technologies play a vital role in many industrial sectors.
What is Electrodialysis Membrane Technology?
Electrodialysis is a type of membrane-based separation technology that uses electric fields to move ions across membranes. Essentially, EDM works by selectively removing charged particles from a feed stream and concentrating them into a separate stream. This separation is achieved by placing alternating cation- and anion-exchange membranes between two electrodes.
By applying an electric potential across the electrodes, ions in the feed stream are driven towards the opposite charge membrane, where they can pass through and be trapped by an adjacent membrane of the same charge. This process creates a series of compartments or "cells" within the EDM stack, each containing a specific ion concentration.
In the picture above we show the typical configuration of an electrodialysis membrane stack. The electrodialysis process utilizes an electrodialysis stack built on the filter press principle. The stack consists of 200–400 alternate cationic and anionic membranes between two electrodes; the aqueous feed solution flows through the cells between each pair of membranes. Because of the arrangement of ion-selective membranes, the migrating ions become concentrated in each alternate cell in the stack. Thus, ions removed from the aqueous feed solution are concentrated into two separate streams.
Applications for Electrodialysis Membranes
Electrodialysis membranes are currently use for various applications, including:
Removal of salts from feed liquids in various production processes such as chemical/food/pharmaceuticals;
Preparation, treatment and recycling of industrial water such as industrial primary pure water, industrial reclaimed water, industrial salt-containing wastewater, and reverse osmosis brine;
Preparation of domestic and drinking water such as surface water purification, brackish water desalination and seawater desalination.
Electrodialysis Membrane Stack Technical Data
Get in touch with our team for more technical details about our anionic, cationic, and bipolar membranes stacks for electrodialysis equipment.