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OwnerTinto Johnichan Alencherry, Venkataraghavan Rajanarayanainventors
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Disclosed is a process for improved recovery of deionised water from a feed water stream, comprising the steps of: (i) delivering the feed water stream in to a capacitive deionisation cell; (ii) measuring the salt concentration of the water exiting the capacitive deionisation cell; (iii) collecting the water exiting the cell, when the salt concentration is lower than a predetermined lower set point, to prepare purified water or rejecting the water exiting the cell when the salt concentration is higher than a predetermined upper set point; wherein the water exiting the cell is recycled with the feed water stream when the salt concentration of the water exiting the cell is between the lower set point and the upper set point. By this process the waste water produced during capacitive deionization can be recycled so as to improve total recovery of water as well as to enhance the life of the electrodes of the capacitive deionisation cell.
1-6. (canceled)
A device for improved recovery of deionised water from feed water stream comprising:
(canceled)
A device as claimed in claim 1 wherein said upper set point is not higher than the salt concentration of the feed water stream.
A device as claimed in claim 1 wherein the upper set point is higher than 500 ppm.
A device as claimed in claim 1 wherein the upper set point is lower than 1500 ppm.
A device as claimed in claim 1 wherein the lower set point is lower than 300 ppm.
A device as claimed in claim 1 wherein the lower set point is higher than 100 ppm.
A device as claimed in claim 1 wherein said meter is a conductivity meter.
Dependencies are inferred from the claim text.