公开(公告)号：US20170297930A1

公开(公告)日：2017-10-19

申请号：US15516247

申请日：2015-09-28

Applicant: XYLEM IP MANAGEMENT S.À R.L.

Inventor： Alexis De Kerchove ,  Alan Merry

IPC: C02F1/52 ,  C02F3/12 ,  C02F103/00 ,  C02F101/10

CPC classification number: C02F1/5209 ,  C02F1/5236 ,  C02F1/5245 ,  C02F3/1215 ,  C02F3/1263 ,  C02F3/301 ,  C02F2101/105 ,  C02F2103/001 ,  C02F2103/002 ,  C02F2103/005 ,  C02F2209/08 ,  C02F2209/14 ,  C02F2209/16 ,  C02F2209/18 ,  C02F2209/40 ,  C02F2209/44 ,  Y02W10/15

Abstract: A method for treating wastewater by using a coagulant that aggregates a phosphorus-containing substance. The method includes executing a reaction phase having a biological treatment phase and a subsequent chemical treatment phase. The chemical treatment phase includes the first substep of mixing the wastewater while injecting a predetermined dose of the coagulant into the basin in order for the coagulant to contact and coagulate the phosphorus-containing substances. The injection of the dose of the binding compound into the basin is performed during a time period equal to or more than a time period required to accomplish two mixing turnovers of the wastewater and equal to or less than a time period required to accomplish seven mixing turnovers of the wastewater. The second substep includes mixing the wastewater in order to flocculate the coagulated substance.