Higher turbidity allowance
Water flows through channels along the surface of ion exchange membranes while electricity moves ionized salts through the membrane, so it can handle higher levels of turbidity in feedwater.
Silica is an uncharged molecule, so it simply flows through the stack with no impact to the membranes.
Variability of feeds
The flexibility of EDR allows for wide variations of TDS and temperature without significant upset to process or performance. Voltage adjustments are all that is needed to meet changing needs.
Economics of high recovery
Savings from reduced brine disposal cost and associated replenishment of supply can lead to operating costs for EDR that are lower in more than 80% of cities around the world.
Reduced Pre-treatment requirements
EDR is an alternative desalination technology that requires less pretreatment than reverse osmosis, while often providing a more robust and reliable operation.