Features & Benefits
Silica tolerance
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
Water scarcity demands resourceful solutions. High-recovery EDR maximizes water usage, minimizes waste, and lowers operating costs.
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.
Reduced pretreatment requirements
EDR is an alternative desalination technology that requires less pretreatment than reverse osmosis, while often providing a more robust and reliable operation
Applications
Veolia's EDR is used on a range of water types for the removal of charged contaminants such as nitrate, arsenic, radionuclides, fluoride, sulfate, and chloride. The most typical applications are:
- Desalination of ground and surface brackish water for potable use
- TDS removal from tertiary-treated wastewater for irrigation or to meet discharge requirements
- Recovery of industrial wastewater in oil & gas extraction, semiconductor facilities, scrubber reclaim and more.
Models
Veolia's EDR has two offering including the MK4 and V Series. Both these systems offer lower operating costs and savings from reduced brine waste.
For drinking water, EDR has lower operating costs than traditional RO when water and wastewater charges exceed $0.20/m3. In drinking water, EDR systems can have up to 40% lower capital cost than an MMF-RO solution.
Also, in wastewater desalination or reuse for irrigation applications, EDR offers lower lifetime cost than MF/UF-RO with up to 50% lower capital cost and 20% lower operating cost, even before water savings associated with higher recovery.
