ALEXANDRIA, Va., July 9 -- United States Patent no. 12,351,497, issued on July 8, was assigned to EVOQUA WATER TECHNOLOGIES LLC (Pittsburgh).

"Methods and systems for treating phosphogypsum-containing water" was invented by Wenxin Du (Dover, N.H.), Hao Dang (Dracut, Mass.), George Y. Gu (Andover, Mass.), Michael J. Shaw (Derry, N.H.), Simon P. Dukes (Chelmsford, Mass.) and Justin Wayne Higgs (Nolensville, Tenn.).

According to the abstract* released by the U.S. Patent & Trademark Office: "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 re...