Recycle loop for reduced scaling in bipolar membrane electrodialysis

Abstract

A method including introducing seawater into an electrodialysis unit including at least one cell including a basified solution compartment, a bipolar membrane, an acidified solution compartment and an anion exchange membrane; acidifying the seawater; removing acidified seawater from the acidified solution compartment; removing CO2 from the acidified seawater to form a decarbonized seawater; introducing the decarbonized seawater into the basified solution compartment of the electrodialysis unit. A system including an electrodialysis unit including an acidified solution compartment, a basified solution compartment, a bipolar membrane, an input to the acidified solution compartment and an input to the basified solution compartment; and a desorption unit coupled to an output of the acidified solution compartment, the desorption unit operable to remove CO2 from a solution from the acidified solution unit, the desorption unit including a solution output that is coupled to the input to the basified solution compartment.

Dependencies are inferred from the claim text.