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US 2023/0145108 A1Published application
Methods and Systems for Treating Phosphogypsum-Containing Water
AssigneeEvoqua Water Technolgies LLC
InventorsWenxin Du, Hao Dang, George Y. Gu, Michael J. Shaw, Simon P. Dukes, Justin Wayne Higgs
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Abstract
Methods for treating phosphogypsum-containing water are disclosed. The water may be treated so as to promote precipitation of one or more target constituents and to facilitate downstream membrane treatment. A coagulant may be added to promote phosphate recovery. Ammonia may optionally be removed. Related systems are also disclosed.
Claims22
A method of treating phosphogypsum-containing water, comprising:
- promoting precipitation of at least one target constituent from the phosphogypsum-containing water to produce a supernatant water;
- introducing a free metal or salt thereof to the supernatant water to provide a pretreated supernatant water;
- subjecting the pretreated supernatant water to membrane separation to produce treated water having at least one predetermined discharge requirement and a concentrate stream;
- removing ammonia from at least one of the pretreated supernatant water and the concentrate stream;
- and
- discharging the treated water.
3 more elements
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- (canceled)
Dependencies are inferred from the claim text.