Electrodialysis (ED)

For value-added demineralization of process streams

Using our proprietary ion exchange membranes, ED increases the quality and purity of your process stream by removing salts and other ionized components, keeping the valuable product.

Download ED and BPED Systems Brochure

Overview
How It Works
Case Studies & Resources

Overview

Features & Benefits

High recovery of valued product by removing minerals and other ionized components.
Reduces chemical consumption and salt waste effluent compared to Ion Exchange (IX).
Flexibility of operation because processes can be tuned to meet any product set point.
Operates simply and reliably using a skid-mounted and automated design that operates in continuous or batch mode.
Batch or continuous operation with Veolia’s modular system designs.

Applications

Dairy: whey and permeate demineralization
Removal of heat stable amine salts, demineralization of glycol solutions
Wine stabilization
Glycerin desalting
Demineralization of sweeteners

How It Works

Electrodialysis serves as a demineralization process that operates similarly to a plate-and-frame ion exchanger system. In this process (Figure 1), ions are transported from the salt-containing feed stream to a separate water stream called the concentrate through the use of selective ion-exchange membranes. The process is driven by a direct electric field that is applied between an anode and a cathode. The valuable products, which remain uncharged, stay within the feed stream (now called the dilute stream), and these products include substances such as whey protein, lactose, sugar, glycerin, and glycol.

ED process