Environmentally responsible disposal of reject brine resulting from water remediation process is a Global Concern.
Electro-dialysis reversal is an effective and efficient method for separation of captured contaminates for other productive uses.
ELECTRO-DIALYSIS REVERSAL SYSTEM
The EDR process uses DC voltage to transfer ionic species from the feed water through ion exchange membranes to a concentrate stream, creating a more dilute stream. The polarity of DC voltage is reversed several times per hour. The alternating exposure of membrane surfaces to the dilute and concentrate streams provides a self-cleaning capability that enables purification and recovery of up to 94% of the feed water as product.
EDR applications include desalination of brackish ground and surface waters and removal of specific ions such as arsenic, radium and nitrates. In addition, EDR is used to desalt secondary-treated municipal effluent for irrigation and other non-potable uses.