Catalytic treatment of hard water in a reverse osmosis system

Details Catalytic treatment of hard water in a reverse osmosis system Catalytic treatment of hard water in a reverse osmosis system

2005-08-30

2005-08-30

Reifsnyder, David A. (Department: 1723)

Liquid purification or separation

Processes

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

C210S695000, C210S805000, C210S806000, C210S195200, C210S223000, C210S257200, C210S259000, C210S295000, C210S321600, C210S416100

Reexamination Certificate

active

06936172

ABSTRACT:
A water treatment system which comprises a reverse osmosis device having a fluid inlet, a permeate outlet and a concentrate outlet with a pump to pump a fluid through the reverse osmosis device, and a magnetic treatment device situated upstream of the fluid inlet, and filter means arranged to filter fluid from the concentrate outlet prior to recycling the fluid upstream of the magnetic treatment device. When a plurality of passes, the system reduces membrane fouling as the crystal structure of the precipitate is changed to reduce the amount of calcite to a deposit which precipitates mostly as aragonite.

REFERENCES:
patent: 4167480 (1979-09-01), Mach
patent: 5234583 (1993-08-01), Cluff
patent: 6030535 (2000-02-01), Hayashi et al.
patent: 2003/0196955 (2003-10-01), Hughes

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