The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 25, 2025
Filed:
Aug. 21, 2019
Applicant:
Evoqua Water Technologies Llc, Pittsburgh, PA (US);
Inventors:
Hao Dang, Dracut, MA (US);
Wenxin Du, Dover, NH (US);
George Y. Gu, Andover, MA (US);
Michael J. Shaw, Derry, NH (US);
Assignee:
Evoqua Water Technologies LLC, Pittsburgh, PA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C02F 9/00 (2023.01); B01D 61/52 (2006.01); C02F 1/20 (2023.01); C02F 1/42 (2023.01); C02F 1/44 (2023.01); C02F 1/469 (2023.01); C02F 1/52 (2023.01); C02F 1/66 (2023.01); C02F 101/10 (2006.01); C02F 101/14 (2006.01); C02F 101/16 (2006.01); C02F 103/34 (2006.01);
U.S. Cl.
CPC ...
C02F 9/00 (2013.01); B01D 61/52 (2013.01); B01D 2311/04 (2013.01); B01D 2311/2623 (2013.01); B01D 2311/2642 (2013.01); B01D 2311/2653 (2013.01); C02F 1/20 (2013.01); C02F 1/42 (2013.01); C02F 1/441 (2013.01); C02F 1/4693 (2013.01); C02F 1/5245 (2013.01); C02F 1/529 (2013.01); C02F 1/66 (2013.01); C02F 2101/105 (2013.01); C02F 2101/14 (2013.01); C02F 2101/16 (2013.01); C02F 2103/34 (2013.01); C02F 2209/02 (2013.01); C02F 2209/055 (2013.01); C02F 2209/06 (2013.01); C02F 2209/40 (2013.01); C02F 2301/046 (2013.01);
Abstract
Methods for processing pretreated phosphogypsum wastewater are disclosed. The pretreated wastewater may be subjected to electrodialysis involving at least one monovalent cation selective membrane. Further downstream membrane treatment may be applied. Upstream precipitation and air-stripping techniques may optionally also be employed. Related systems are also disclosed.