公开(公告)号：US20170225982A1

公开(公告)日：2017-08-10

申请号：US15428814

申请日：2017-02-09

Applicant: GRUNDFOS HOLDING A/S

Inventor： Bruno KIILERICH ,  Christian SCHOU ,  Martin LYNGSØ

IPC: C02F1/68 ,  C02F1/00

CPC classification number: C02F1/686 ,  C02F1/008 ,  C02F2101/101 ,  C02F2209/001 ,  C02F2209/003 ,  C02F2209/26 ,  C02F2209/265 ,  C02F2209/40 ,  C02F2307/08 ,  E03F5/22 ,  E03F2201/20

Abstract: A unit (8) is intended for treating waste water. It includes a well (9) with an inlet conduit connector (21) and with an outlet conduit connector (22) at the outside of the well (9). The unit further includes a connecting conduit (20) inside the well (9). The connecting conduit (20) connects the inlet conduit connector (21) to the outlet conduit connector (22). There is at least one storage tank (13) inside the well (9) for a liquid chemical and a metering pump (18) inside the well (9) for pumping the chemical from the storage tank (13) into the connecting conduit (20). A control device (23) activates the metering pump according to a signal of a sensor (24) which senses a quantity of chemical element in the liquid flowing through the conduit (20).