Water purification system and methods, and module for the...

Details Water purification system and methods, and module for the... Water purification system and methods, and module for the...

2004-03-04

2008-08-05

Drodge, Joseph (Department: 1797)

Liquid purification or separation

Processes

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

C210S110000, C210S137000, C210S259000, C210S321650, C210S443000, C210S109000, C210S650000, C210S806000, C204S519000, C204S542000, C204S628000

Reexamination Certificate

active

07407585

ABSTRACT:
The invention relates to a method and a system for purifying water whereby:the water to be purified is pressurized (13);a pressurized flow of said water is directed onto at least one selective permeability membrane to divide (11) the flow of pressurized water into a permeate flow and a retentate flow;the permeate flow is electrodeionized (12) to produce a flow of purified water consisting of the electrodeionized permeate flow;the flowrate of the retentate flow (19) is reduced;a substantially constant predetermined pressure (21) is maintained on the selective permeability membrane(s); anda substantially constant predetermined permeate flowrate is maintained.It also relates to a tangential filtration module suitable for the above kind of system.

REFERENCES:
patent: 4808287 (1989-02-01), Hark
patent: 5227062 (1993-07-01), Olsen
patent: 5762789 (1998-06-01), de los Reyes et al.
patent: 5919357 (1999-07-01), Wilkins et al.
patent: 6350382 (2002-02-01), Schick
patent: 6564824 (2003-05-01), Lowery et al.
patent: 6571831 (2003-06-01), Hart
patent: 6607668 (2003-08-01), Rela
patent: 2003/0034292 (2003-02-01), Rela

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