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US 2017/0361279 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 or saline water and methods of operation of same.
Claims29
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 water to be treated having a concentration of dissolved salts of between 500 mg/L and 5,000 mg/L, a diluate outlet, and a concentrate outlet;
- a nanofiltration apparatus positioned downstream of the electrodialysis apparatus and having an inlet fluidly connectable to the diluate outlet of the electrodialysis apparatus, a permeate outlet, and a retentate outlet;
- an irrigation distribution system fluidly connectable to the retentate outlet of the nanofiltration apparatus and with the diluate outlet of the electrodialysis apparatus;
- and
- a diverting system 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 water to be treated having a concentration of dissolved salts of between 500 mg/L and 5,000 mg/L to an inlet of an electrodialysis apparatus including one or more monovalent ion selective membranes;
- treating the 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;
- treating any diluate directed to the inlet of the nanofiltration apparatus in the nanofiltration apparatus to produce a permeate and a retentate;
- and
- combining any retentate with the amount of the diluate directed to the irrigation distribution system at the irrigation distribution system.
3 more elements
Dependencies are inferred from the claim text.