US Patent Issued to Xylem Water Solutions U.S.A. on Dec. 16 for "Method for supplying return activated sludge" (British Inventor)

ALEXANDRIA, Va., Dec. 16 -- United States Patent no. 12,497,314, issued on Dec. 16, was assigned to Xylem Water Solutions U.S.A. Inc. (Brown Deer, Wis.).

"Method for supplying return activated sludge" was invented by Darren Paul Lawrence (Warwickshire, Great Britain).

According to the abstract* released by the U.S. Patent & Trademark Office: "A method of processing waste water to produce a filtrate is provided. The method includes the steps of: introducing untreated wastewater to an inlet zone of a bioreactor; introducing a concentrate of treated waste water with at least 10,000 mg/L of total suspended solids into the inlet zone of the bioreactor to form a biological active mixture; aerating the biological active mixture in an aeration zo...