公开(公告)号：US20220259085A1

公开(公告)日：2022-08-18

申请号：US17275286

申请日：2019-08-21

Applicant: Evoqua Water Technologies LLC

Inventor： Hao Dang ,  Wenxin Du ,  George Y. Gu ,  Michael J. Shaw ,  Simon P. Dukes

IPC: C02F9/00

Abstract: 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 recovery. Related systems are also disclosed.

公开(公告)号：US11298660B2

公开(公告)日：2022-04-12

申请号：US16098591

申请日：2017-05-04

Applicant: Evoqua Water Technologies, LLC

Inventor： Li-Shiang Liang ,  Michael J. Shaw ,  Wenxin Du

IPC: B01D61/44 ,  C02F1/469

Abstract: A method of operating an electrochemical device includes periodically discharging a volume of concentrate reject in a timed batch cycle and replacing the concentrate reject with feed water. An electrochemical water treatment system includes a recycle line having a valve controlled by a control module. The control module periodically opens the valve to discharge concentrate reject from the recycle line in a batch timed cycle. The recycle line is fed with feed water to replace the discharged concentrate reject.

公开(公告)号：US20240034648A1

公开(公告)日：2024-02-01

申请号：US18377823

申请日：2023-10-08

Applicant: Evoqua Water Technologies LLC

Inventor： Joshua Griffis ,  George Gu ,  Simon P. Dukes ,  Michael J. Shaw

IPC: C02F1/467 ,  C02F1/461

CPC classification number: C02F1/4674 ,  C02F1/46104 ,  C25B9/23

Abstract: An electrochemical cell including a first chamber having an anode, a second chamber having a cathode, at least one ionic connection between the first chamber and the second chamber, such that liquid electrolyte from the first chamber is prevented from mixing with liquid electrolyte in the second chamber is provided. The first chamber and the second chamber can be arranged in parallel and positioned remotely from each other. An electrochemical system including the electrochemical cell, and first and second sources of saline aqueous solutions is also provided. Water treatment systems are also provided. A method of operating an electrochemical cell including introducing first and second saline aqueous solutions into first and second chambers of the electrochemical cell, and applying a current across the anode and the cathode to generate first and second products, respectively is also provided. A method of facilitating operation of an electrochemical cell is also provided.

公开(公告)号：US11795074B2

公开(公告)日：2023-10-24

申请号：US16491728

申请日：2018-03-06

Applicant: EVOQUA WATER TECHNOLOGIES LLC

Inventor： George Y. Gu ,  Simon Paul Dukes ,  Joshua Griffis ,  Michael J. Shaw

IPC: C02F1/46 ,  C02F1/467 ,  C02F1/461 ,  C25B9/23 ,  C02F103/08 ,  C25B1/26 ,  C25B15/02 ,  C25B15/031 ,  C25B9/17 ,  C25B15/029 ,  C25B1/30 ,  C25B1/04

CPC classification number: C02F1/4674 ,  C02F1/46104 ,  C02F2103/08 ,  C02F2201/4613 ,  C02F2201/4614 ,  C02F2201/46115 ,  C02F2201/46135 ,  C02F2201/46145 ,  C02F2201/46175 ,  C02F2209/04 ,  C02F2209/06 ,  C02F2209/23 ,  C02F2209/30 ,  C02F2209/40 ,  C02F2303/04 ,  C25B1/04 ,  C25B1/26 ,  C25B1/30 ,  C25B9/17 ,  C25B9/23 ,  C25B15/02 ,  C25B15/029 ,  C25B15/031

Abstract: An electrochemical cell including a first chamber having an anode, a second chamber having a cathode, at least one ionic connection between the first chamber and the second chamber, such that liquid electrolyte from the first chamber is prevented from mixing with liquid electrolyte in the second chamber is provided. The first chamber and the second chamber can be arranged in parallel and positioned remotely from each other. An electrochemical system including the electrochemical cell, and first and second sources of saline aqueous solutions is also provided. Water treatment systems are also provided. A method of operating an electrochemical cell including introducing first and second saline aqueous solutions into first and second chambers of the electrochemical cell, and applying a current across the anode and the cathode to generate first and second products, respectively is also provided. A method of facilitating operation of an electrochemical cell is also provided.

公开(公告)号：US20230145108A1

公开(公告)日：2023-05-11

申请号：US17276352

申请日：2019-08-21

Applicant: EVOQUA WATER TECHNOLOGIES LLC

Inventor： Wenxin Du ,  Hao Dang ,  George Y. Gu ,  Michael J. Shaw ,  Simon P. Dukes ,  Justin Wayne Higgs

IPC: C02F9/00 ,  C02F1/44 ,  C02F1/20

CPC classification number: C02F9/00 ,  C02F1/444 ,  C02F1/441 ,  C02F1/20 ,  C02F2101/16

Abstract: 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 recovery. Ammonia may optionally be removed. Related systems are also disclosed.

公开(公告)号：US10800678B2

公开(公告)日：2020-10-13

申请号：US15760400

申请日：2016-09-16

Applicant: Evoqua Water Technologies, LLC

Inventor： Joseph D. Gifford ,  Joshua Griffis ,  Simon P. Dukes ,  Li-Shiang Liang ,  Michael J. Shaw ,  Frederick C. Wilkins

IPC: C02F1/467 ,  C25B1/26 ,  C25B15/02 ,  C02F1/461 ,  C25B15/08 ,  C25B3/04 ,  C02F103/00 ,  C02F103/02 ,  C02F103/08

Abstract: An electrochlorination system comprising an electrochemical cell including a housing having an inlet, an outlet, and an anode-cathode pair disposed within the housing, a source of a chloride-containing aqueous solution having an outlet fluidly connectable to the inlet of the electrochemical cell, and a source of an oxidizing agent fluidly connectable to the source of chloride-containing aqueous solution upstream of the electrochemical cell.

公开(公告)号：US12194417B2

公开(公告)日：2025-01-14

申请号：US17719363

申请日：2022-04-12

Applicant: Evoqua Water Technologies LLC

Inventor： Li-Shiang Liang ,  Michael J. Shaw ,  Wenxin Du

IPC: B01D61/44 ,  B01D61/46 ,  C02F1/469

Abstract: A method of operating an electrochemical device includes periodically discharging a volume of concentrate reject in a timed batch cycle and replacing the concentrate reject with feed water. An electrochemical water treatment system includes a recycle line having a valve controlled by a control module. The control module periodically opens the valve to discharge concentrate reject from the recycle line in a batch timed cycle. The recycle line is fed with feed water to replace the discharged concentrate reject.

公开(公告)号：US20240043294A1

公开(公告)日：2024-02-08

申请号：US18484955

申请日：2023-10-11

Applicant: Evoqua Water Technologies LLC

Inventor： George Y. Gu ,  Michael J. Shaw ,  Joshua Griffis ,  Simon P. Dukes

IPC: C02F1/467 ,  C02F1/461

CPC classification number: C02F1/4674 ,  C02F1/46104 ,  C25B9/23

Abstract: A method of operating an electrochemical cell including introducing an aqueous solution into the electrochemical cell, applying a current across an anode and a cathode to produce a product, monitoring the voltage, dissolved hydrogen, or a condition of the aqueous solution, and applying the current in a pulsed waveform responsive to one of the measured parameters is disclosed. An electrochemical system including an electrochemical cell including an anode and a cathode, a source of an aqueous solution having an outlet fluidly connectable to the electrochemical cell, a sensor for measuring a parameter, and a controller configured to cause the anode and the cathode to apply the current in a pulsed waveform responsive to the parameter measurement is disclosed. Methods of suppressing accumulation of hydrogen gas within the electrochemical cell are also disclosed. Methods of facilitating operation of an electrochemical cell are also disclosed.

公开(公告)号：US20200381761A1

公开(公告)日：2020-12-03

申请号：US16771278

申请日：2018-12-13

Applicant: Evoqua Water Technologies LLC

Inventor： George Y. Gu ,  Savvas Hadjikyriacou ,  Michael J. Shaw ,  Simon P. Dukes

IPC: H01M8/18 ,  H01M8/0245 ,  B01J41/13

Abstract: A flow battery having at least one rechargeable cell is disclosed. The at least one rechargeable cell can include an anolyte compartment, a catholyte compartment, and an anion exchange membrane positioned between the anolyte and catholyte compartments. The anion exchange membrane can have a thickness of less than 100 μm and a steady state diffusivity of less than 0.4 ppm/hr/cm2 with respect to a cation species in an electrolyte of the rechargeable cell. A method of facilitating use of a flow battery including providing the anion exchange membrane is also disclosed. A method of facilitating storage of an electric charge comprising providing the flow battery is also disclosed. A method of producing an anion exchange membrane is also disclosed.

公开(公告)号：US20180257961A1

公开(公告)日：2018-09-13

申请号：US15760400

申请日：2016-09-16

Applicant: Evoqua Water Technologies, LLC

Inventor： Joseph D. Gifford ,  Joshua Griffis ,  Simon P. Dukes ,  Li-Shiang Liang ,  Michael J. Shaw ,  Frederick C. Wilkins

IPC: C02F1/467 ,  C25B3/04 ,  C02F1/461 ,  C25B1/26 ,  C25B15/08 ,  C25B15/02

Abstract: An electrochlorination system comprising an electrochemical cell including a housing having an inlet, an outlet, and an anode-cathode pair disposed within the housing, a source of a chloride-containing aqueous solution having an outlet fluidly connectable to the inlet of the electrochemical cell, and a source of an oxidizing agent fluidly connectable to the source of chloride-containing aqueous solution upstream of the electrochemical cell.