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US 2017/0362102 A1Published application
Method and system for water treatment
AssigneeEvoqua Water Technologies LLC
InventorsGary C. Ganzi, Frederick C. Wilkins
Life of this patent
Estimating the term…
Abstract
Water treatment systems including electrically-driven and pressure-driven separation apparatus configured to produce a first treated water suitable for use as irrigation water and a second treated water suitable for use as potable water from brackish water and methods of operation of same.
Claims26
A water treatment system for producing water for irrigation, the system comprising:
- an electrodialysis apparatus including one or more monovalent ion selective membranes and having an inlet fluidly connectable to a source of brackish water to be treated, a diluate outlet, and a concentrate outlet;
- a nanofiltration apparatus positioned downstream of the electrodialysis apparatus and having an inlet in fluid communication with the diluate outlet of the electrodialysis apparatus, a filtrate outlet, and a retentate outlet;
- an irrigation distribution system in fluid communication with the retentate outlet of the nanofiltration apparatus and with the diluate outlet of the electrodialysis apparatus;
- and
- a diverting valve configured to vary an amount of diluate from the electrodialysis apparatus directed to the irrigation distribution system and an amount of diluate from the electrodialysis apparatus directed to the nanofiltration apparatus.
2 more elements
A method of treating brackish water to produce irrigation water, the method comprising:
- directing brackish water to be treated to an inlet of an electrodialysis apparatus including one or more monovalent ion selective membranes;
- treating the brackish water to be treated in the electrodialysis apparatus to produce a diluate;
- determining an amount of the diluate to direct to an irrigation distribution system and an amount of the diluate to direct to an inlet of a nanofiltration apparatus;
- directing at least a portion of the diluate to the irrigation distribution system;
- treating any diluate directed to the inlet of a nanofiltration apparatus in the nanofiltration apparatus to produce a filtrate and a retentate;
- and
- combining any retentate with the portion of the diluate directed to the irrigation distribution system at the irrigation distribution system.
4 more elements
Dependencies are inferred from the claim text.