公开(公告)号：US20210162347A1

公开(公告)日：2021-06-03

申请号：US17263006

申请日：2019-07-25

Applicant: EVOQUA WATER TECHNOLOGIES LLC

Inventor： Scott Waugh ,  Li-Shiang Liang ,  Frederick C. Wilkins ,  Charles P. Buzzel

IPC: B01D61/52 ,  B01D61/46 ,  B01D61/54 ,  B01D65/02 ,  C02F1/469 ,  C02F1/00

Abstract: Methods of operating an electrochemical separation device is disclosed. The methods include operating the electrochemical separation device in an active mode until the resistance reaches a predetermined threshold, regenerating the electrochemical separation device in a passive mode until the resistance reaches a predetermined threshold, and resuming operation of the electrochemical separation device in the active mode. The methods also include operating the electrochemical separation device in an active mode for a predetermined period of time, regenerating the electrochemical separation device in a passive mode for a predetermined period of time, and resuming operation of the electrochemical separation device in the active mode. Water treatment systems include the electrochemical separation device and a control module are also disclosed. Methods of facilitating operation of the electrochemical separation device by providing a control sequence are also disclosed.

公开(公告)号：US20240228352A1

公开(公告)日：2024-07-11

申请号：US18692025

申请日：2022-09-12

Applicant: EVOQUA WATER TECHNOLOGIES LLC

Inventor： Joshua W. Griffis ,  Li-Shiang Liang ,  Scott Waugh ,  Charles P. Buzzel ,  Frederick C. Wilkins ,  Gray C. Ganzi

IPC: C02F9/00 ,  B01D61/02 ,  B01D61/04 ,  B01D61/06 ,  B01D61/42 ,  B01D61/48 ,  B01D61/58 ,  B01D71/56 ,  C02F1/44 ,  C02F1/469 ,  C02F103/08

CPC classification number: C02F9/00 ,  B01D61/06 ,  B01D61/58 ,  B01D71/56 ,  B01D61/027 ,  B01D61/04 ,  B01D61/423 ,  B01D61/48 ,  B01D2313/18 ,  B01D2313/246 ,  B01D2317/022 ,  B01D2317/025 ,  B01D2317/08 ,  C02F1/442 ,  C02F1/4695 ,  C02F2103/08 ,  C02F2209/40 ,  C02F2301/046 ,  C02F2301/08

Abstract: Systems for water desalination are disclosed. The systems include a source of non-potable water, a low pressure nanofiltration device, a first electrodialysis unit, a second electrodialysis unit, and recycle conduits. Methods of water desalination including directing non-potable water to a low pressure nanofiltration device, a first electrodialysis unit, and a second electrodialysis unit are also disclosed. Methods of facilitating water desalination by providing a water desalination system are also disclosed.