Electrodeionization and ultraviolet light treatment method for p

Details Electrodeionization and ultraviolet light treatment method for p Electrodeionization and ultraviolet light treatment method for p

1989-09-08

1992-05-26

Sever, Frank

Liquid purification or separation

Processes

Liquid/liquid solvent or colloidal extraction or diffusing...

204302, 210681, 210748, B01D 6142, B01D 6144

Patent

active

051165090

ABSTRACT:
A process is provided for removing organics and ions from liquid. Water to be purified is first exposed to ultraviolet(UV) radiation to oxidize organics in the liquid. The UV-treated water then is passed through an electrodeionization apparatus having an ion depletion compartment containing mixed anion and cation exchange resin beads and an ion concentration compartment in a given separation stage having an anode and a cathode. A second liquid is passed through the concentration compartment which is free of or filled with ion exchange resin beads. Ions under the influence of D.C. potential pass from the depletion compartments into the concentration compartments through ion permeable membranes. The electrodeionization apparatus can be operated continuously in conjunction with the UV radiation step since resin regeneration is not required.

REFERENCES:
patent: 4632745 (1986-12-01), Giuffrida
patent: 4747929 (1988-05-01), Siu et al.
patent: 4931160 (1990-06-01), Giuffrida

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