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：US20240317616A1

公开(公告)日：2024-09-26

申请号：US18689667

申请日：2022-08-30

Applicant: EVOQUA WATER TECHNOLOGIES LLC

Inventor： Simon Paul Dukes ,  Joshua W. Griffis ,  Yang Chen ,  George Y. Gu

IPC: C02F1/48 ,  C02F1/24

CPC classification number: C02F1/48 ,  C02F1/24 ,  C02F2303/26 ,  C02F2305/023

Abstract: Systems and methods for treating water containing PFAS are disclosed. Plasma activated excited gas is encapsulated with nanobubbles in water comprising PFAS to be treated. Liquid-phase reaction of the PFAS with the encapsulated plasma activated excited gas at the air-water interface of the nanobubbles is promoted. The PFAS can be concentrated upstream of the plasma reactor. A foam fractionation process may be used in conjunction with the plasma reactor to facilitate PFAS removal.

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：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：US20220380235A1

公开(公告)日：2022-12-01

申请号：US17646829

申请日：2022-01-03

Applicant: EVOQUA WATER TECHNOLOGIES LLC

Inventor： George Y. Gu

IPC: C02F1/469 ,  B01D61/46 ,  B01D61/48 ,  B01D69/02

Abstract: Systems and methods for treating water may involve a first electrochemical separation module that includes at least one ion exchange membrane having a first set of performance characteristics, and a second electrochemical separation module that includes at least one ion exchange membrane having a second set of performance characteristics that is different than the first set of performance characteristics. Performance characteristics may relate to at least one of water loss, electrical resistance, and permselectivity. Staged treatment systems and methods may provide improved efficiency.

公开(公告)号：US20150344332A1

公开(公告)日：2015-12-03

申请号：US14650082

申请日：2013-03-15

Applicant: George Y. GU ,  EVOQUA WATER TECHNOLOGIES LLC

Inventor： George Y. Gu

IPC: C02F1/46 ,  C02F1/469

CPC classification number: C02F1/4604 ,  B01D61/422 ,  B01D61/48 ,  B01D2317/025 ,  C02F1/4693 ,  C02F1/4695 ,  C02F2103/08 ,  C02F2201/007 ,  C02F2201/46 ,  C02F2201/46115 ,  C02F2301/08 ,  C25B9/08 ,  C25B9/20 ,  Y02W10/33 ,  Y02W10/37

Abstract: Systems and methods for treating water may involve a first electrochemical separation module that includes at least one ion exchange membrane having a first set of performance characteristics, and a second electrochemical separation module that includes at least one ion exchange membrane having a second set of performance characteristics that is different than the first set of performance characteristics. Performance characteristics may relate to at least one of water loss, electrical resistance, and permselectivity. Staged treatment systems and methods may provide improved efficiency.

Abstract translation: 用于处理水的系统和方法可以包括第一电化学分离模块，其包括具有第一组性能特征的至少一个离子交换膜，以及第二电化学分离模块，其包括具有第二组性能特征的至少一个离子交换膜 这与第一组性能特征不同。 性能特征可能与水损失，电阻和选择性选择性中的至少一种有关。 分级治疗系统和方法可以提供改善的效率。

公开(公告)号：US20250059071A1

公开(公告)日：2025-02-20

申请号：US18562416

申请日：2022-05-20

Applicant: Evoqua Water Technologies LLC

Inventor： Joshua Griffis ,  Simon P. Dukes ,  Ben Satterfield ,  Yang Chen ,  George Y. Gu

IPC: C02F1/467 ,  C02F1/00 ,  C02F1/461 ,  C02F1/78 ,  C02F101/34

Abstract: Systems for treating water are disclosed. The system includes an ozonation subsystem including a source of ozone configured to dissolve ozone into water from a source of water to produce ozonated water. The system further includes an electrochemical cell co-located with the ozonation subsystem having an inlet connectable to a source of electrolyte and an outlet. The electrochemical cell is configured to produce hydrogen peroxide from electrolyte from the source of electrolyte. The system additionally includes a mixing zone configured to receive the ozonated water, to receive the hydrogen peroxide from the outlet of the electrochemical cell, and to mix the ozonated water and hydrogen peroxide to form peroxone. Systems and methods of treating water, such as by selectively removing one or more emergent compounds from contaminated water, using the system are also disclosed.

公开(公告)号：US11929533B2

公开(公告)日：2024-03-12

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 ,  B01J41/13 ,  H01M8/0245

CPC classification number: H01M8/188 ,  B01J41/13 ,  H01M8/0245

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.