公开(公告)号：US20240336507A1

公开(公告)日：2024-10-10

申请号：US18560118

申请日：2022-05-26

Applicant: Evoqua Water Technologies LLC

Inventor： Simon P Dukes ,  Joshua Griffis ,  Li-Shiang Liang ,  Harshita Gogoi ,  Wenxin Du ,  Thomas K Mallmann

IPC: C02F9/00 ,  B01D61/02 ,  B01D61/14 ,  B01D61/16 ,  B01D61/58 ,  C02F1/00 ,  C02F1/44 ,  C02F1/52 ,  C02F1/66 ,  C02F5/00 ,  C02F101/14 ,  C02F103/34

CPC classification number: C02F9/00 ,  B01D61/16 ,  B01D61/58 ,  B01D61/026 ,  B01D61/027 ,  B01D61/029 ,  B01D61/145 ,  B01D2311/04 ,  B01D2311/08 ,  B01D2317/025 ,  B01D2317/08 ,  C02F1/004 ,  C02F1/441 ,  C02F1/442 ,  C02F1/444 ,  C02F1/5236 ,  C02F1/66 ,  C02F5/00 ,  C02F2101/14 ,  C02F2103/34 ,  C02F2301/08

Abstract: A system for the treatment of phosphate-containing wastewater comprises a pretreatment subsystem including a mixing chamber configured to mix a potassium-based salt with the wastewater to precipitate K2SiF6 from the wastewater, a solids-liquid separator to separate the precipitated K2SiF6 from the wastewater and form a pretreated wastewater, and a mixing chamber to dilute the pretreated wastewater with raw wastewater, and a filtration subsystem including a first filtration configured to receive the pretreated wastewater and remove particles to form a first effluent, a second filtration unit remove divalent ions from the first effluent and form a second effluent, and a third filtration unit configured to remove additional dissolved solids from the second effluent and form a third effluent suitable for discharge to the environment.

公开(公告)号：US12017183B2

公开(公告)日：2024-06-25

申请号：US18209457

申请日：2023-06-13

Applicant: Evoqua Water Technologies LLC

Inventor： Michael J. Muse ,  Joshua Griffis ,  Li-Shiang Liang ,  Michael Shaw ,  Simon P. Dukes

IPC: B01D61/48 ,  B01D61/50 ,  B01D63/08 ,  B01D65/00 ,  C02F1/469

CPC classification number: B01D65/003 ,  B01D61/50 ,  B01D63/085 ,  C02F1/4693 ,  C02F1/4695 ,  B01D2313/04 ,  C02F2201/004

Abstract: An electrochemical separation device includes a first electrode, a second electrode, and a cell stack including a plurality of sub-blocks each having alternating depleting compartments and concentrating compartments and each including frame and channel portions disposed between the first electrode and the second electrode. An internal seal formed of a first material is disposed between and in contact with the channel portions between adjacent sub-blocks in the cell stack and configured to prevent leakage between depleting compartments and concentrating compartments in the adjacent sub-blocks. An external seal formed of a second material having at least one material parameter different from the first material is disposed between and in contact with the frames of the adjacent sub-blocks in the cell stack and configured to prevent leakage from an internal volume of the electrochemical separation device to outside of the electrochemical separation device.

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：US20210340031A1

公开(公告)日：2021-11-04

申请号：US17284440

申请日：2019-10-08

Applicant: Evoqua Water Technologies LLC

Inventor： Li-Shiang Liang

IPC: C02F1/469 ,  B01D61/46 ,  B01D61/54

Abstract: A water treatment system for brackish water is disclosed. The water treatment system includes a first electrochemical separation stage fluidly connected to a second, downstream electrochemical separation stage, with the concentrate outlet of the second electrochemical separation stage fluidly connectable to the concentration compartment of the first electrochemical separation stage and a control system configured to regulate feed directed to the concentration compartments of the first and the second electrochemical separation stages. Methods of treating brackish water to produce potable water and methods of treating brackish water using systems of the invention are disclosed. The Donnan potential difference and osmotic water losses are lessened by controlling a source and a flowrate of a make-up feed water directed to concentration compartments of first and the second electrochemical separation stages of the systems.

公开(公告)号：US20190263697A1

公开(公告)日：2019-08-29

申请号：US16287203

申请日：2019-02-27

Applicant: Evoqua Water Technologies LLC

Inventor： Gary C. Ganzi ,  Joahua Griffis ,  Simon Dukes ,  Li-Shiang Liang ,  Darren Adrian Dale ,  Michael Shaw ,  Paul Beddoes ,  George Gu

IPC: C02F9/00

Abstract: A water treatment system for producing potable water and water for irrigation from saline water, the system includes an electrodialysis apparatus including one or more monovalent selective membranes and having an inlet fluidly connectable to a source of water to be treated, a diluate outlet, and a concentrate outlet, a nanofiltration apparatus positioned downstream of the electrodialysis apparatus and having an inlet fluidly connectable to the diluate outlet of the electrodialysis apparatus, a permeate outlet, and a retentate outlet, and an electrolyzer in fluid communication with one of the concentrate outlet and the retentate outlet, and configured to generate a product stream including one or more of chlorine gas, hypochlorite ion, sodium hydroxide, sulfuric acid, hydrochloric acid, or sodium hypochlorite.

公开(公告)号：US09981865B2

公开(公告)日：2018-05-29

申请号：US14442515

申请日：2013-03-15

Applicant: Evoqua Water Technologies LLC

Inventor： Li-Shiang Liang

IPC: C02F1/469 ,  C02F1/461 ,  B01D61/46 ,  B01D63/10 ,  B01D61/52 ,  B01D63/08 ,  B01D63/14 ,  B01D61/48

CPC classification number: C02F1/4695 ,  B01D61/46 ,  B01D61/485 ,  B01D61/52 ,  B01D63/082 ,  B01D63/10 ,  B01D63/14 ,  B01D2313/08 ,  B01D2313/20 ,  B01D2313/345 ,  C02F1/46109 ,  C02F1/4693 ,  C02F2201/4611 ,  C02F2201/46115 ,  Y02W10/33 ,  Y02W10/37

Abstract: Systems and methods for electrochemical separation are provided. An electrochemical separation device may include at least one cell pair wound around an electrode to from a bundle having a racetrack configuration.

公开(公告)号：US09433902B2

公开(公告)日：2016-09-06

申请号：US14539691

申请日：2014-11-12

Applicant: Evoqua Water Technologies LLC

Inventor： Gary C. Ganzi ,  Li-Shiang Liang ,  Frederick C. Wilkins

IPC: C02F1/46 ,  B01D61/58 ,  C02F1/467 ,  B01D61/44 ,  B01D61/48 ,  C02F1/00 ,  C02F1/44 ,  C02F1/469 ,  C02F1/42 ,  C02F103/08

CPC classification number: C02F1/4604 ,  B01D61/44 ,  B01D61/48 ,  B01D61/58 ,  B01D2311/06 ,  B01D2313/28 ,  B01D2313/30 ,  C02F1/001 ,  C02F1/444 ,  C02F1/4674 ,  C02F1/4693 ,  C02F1/4695 ,  C02F2001/422 ,  C02F2103/08 ,  C02F2209/005 ,  Y02A20/131 ,  Y02A20/134 ,  B01D2311/12

Abstract: A low energy water treatment system and method is provided. The system has at least one electrodialysis device that produces partially treated water and a brine byproduct, a softener, and at least one electrodeionization device. The partially treated water stream can be softened by the softener to reduce the likelihood of scale formation and to reduce energy consumption in the electrodeionization device, which produces water having target properties. At least a portion of the energy used by the electrodeionization device can be generated by concentration differences between the brine and seawater streams introduced into compartments thereof. The brine stream can also be used to regenerate the softener.

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：US12180103B2

公开(公告)日：2024-12-31

申请号：US16287203

申请日：2019-02-27

Applicant: Evoqua Water Technologies LLC

Inventor： Gary C Ganzi ,  Joshua Griffis ,  Simon Dukes ,  Li-Shiang Liang ,  Darren Adrian Dale ,  Michael Shaw ,  Paul Beddoes ,  George Gu

IPC: C02F9/00 ,  C02F1/44 ,  C02F1/467 ,  C02F1/20 ,  C02F1/461 ,  C02F1/469 ,  C02F1/66 ,  C02F1/74 ,  C02F101/10 ,  C02F101/16 ,  C02F103/08

Abstract: A water treatment system for producing potable water and water for irrigation from saline water, the system includes an electrodialysis apparatus including one or more monovalent selective membranes and having an inlet fluidly connectable to a source of water to be treated, a diluate outlet, and a concentrate outlet, a nanofiltration apparatus positioned downstream of the electrodialysis apparatus and having an inlet fluidly connectable to the diluate outlet of the electrodialysis apparatus, a permeate outlet, and a retentate outlet, and an electrolyzer in fluid communication with one of the concentrate outlet and the retentate outlet, and configured to generate a product stream including one or more of chlorine gas, hypochlorite ion, sodium hydroxide, sulfuric acid, hydrochloric acid, or sodium hypochlorite.

公开(公告)号：US20240240338A1

公开(公告)日：2024-07-18

申请号：US18560125

申请日：2022-05-11

Applicant: Evoqua Water Technologies LLC

Inventor： Joshua Griffis ,  Simon P Dukes ,  Li-Shiang Liang ,  Benjamin Satterfield ,  Zaccur Qasim Fettig

IPC: C25B15/031 ,  C25B1/04 ,  C25B9/21 ,  C25B15/033 ,  C25B15/08

CPC classification number: C25B15/031 ,  C25B1/04 ,  C25B9/21 ,  C25B15/033 ,  C25B15/087

Abstract: Apparatuses for the generation of carbon dioxide and hydrogen from a water having a carbonate species are disclosed. The apparatus includes an anodic compartment having an anode disposed on a first side of the anodic compartment and a cathodic compartment having a cathode disposed on a first side of the cathodic compartment. The apparatus further includes a first cation permeable fluidic separator disposed on a second side of the anodic compartment and a second cation permeable fluidic separator disposed on a second side of the cationic compartment. A center compartment is defined between the first cation permeable fluidic separator and the second cation permeable fluidic separator. The apparatus further includes a flow control system configured to independently control flow of water through each of the anodic compartment, the cathodic compartment, and the center compartment. Methods of generating hydrogen, carbon dioxide, and oxygen from seawater using the apparatus are also disclosed.