公开(公告)号：US11958762B1

公开(公告)日：2024-04-16

申请号：US18112470

申请日：2023-02-21

Applicant: Evoqua Water Technologies LLC

Inventor： Andrew Green ,  Li-Shiang Liang ,  Joshua Griffis ,  Paul Beddoes

IPC: C02F1/00 ,  C02F1/461 ,  C02F1/467 ,  C02F103/08

CPC classification number: C02F1/46109 ,  C02F1/4674 ,  C02F2001/46119 ,  C02F2001/46171 ,  C02F2103/08 ,  C02F2201/4611 ,  C02F2201/46155 ,  C02F2303/04

Abstract: Self-cleaning electrochemical cells, systems including self-cleaning electrochemical cells, and methods of operating self-cleaning electrochemical cells are disclosed. The self-cleaning electrochemical cell can include a plurality of concentric electrodes disposed in a housing, a fluid channel defined between the concentric electrodes, and an electrical connector positioned at a distal end of a concentric electrode and electrically connected to the electrode. The electrical connectors may be configured to provide a substantially even current distribution to the concentric electrode and minimize a zone of reduced velocity occurring downstream from the electrical connector. The electrical connector may be configured to cause a temperature of an electrolyte solution to increase by less than about 0.5° C. while transmitting at least 100 W of power.

公开(公告)号：US20240109006A1

公开(公告)日：2024-04-04

申请号：US18535487

申请日：2023-12-11

Applicant: Evoqua Water Technologies LLC

Inventor： DONALD J. THIEL ,  JEFFREY P. GERMAIT ,  GOVARDHAN R. KATTA ,  ALLEN LEPAK

IPC: B01D21/24 ,  B01D21/08 ,  B01D21/34

CPC classification number: B01D21/2427 ,  B01D21/08 ,  B01D21/245 ,  B01D21/34

Abstract: An apparatus for wasting flocculant sludge from a clarifier is provided including a wasting pipe fluidly connectable to a waste conduit, a manifold fluidly connectable to the wasting pipe, an upper header for collecting the flocculant sludge fluidly connectable to the manifold, a return sludge pipe fluidly connectable to a return sludge well, a lower header for collecting settled sludge fluidly connectable to the return sludge pipe, and a drive mechanism for rotating the upper header and the lower header about a center axis. A wastewater treatment system is provided including the clarifier fluidly connectable to a source of a mixed liquor and the apparatus for wasting flocculant sludge. A method of separating settled sludge from a clarifier is provided including withdrawing flocculant sludge and withdrawing settled sludge. A method of retrofitting a clarifier is also provided including providing the manifold, the upper header, and the drive mechanism.

公开(公告)号：US20240067547A1

公开(公告)日：2024-02-29

申请号：US17898486

申请日：2022-08-30

Applicant: EVOQUA WATER TECHNOLOGIES LLC

Inventor： Andrew Black ,  Luke Halverson ,  Timothy Pickett ,  Rebeccah Chapman

IPC: C02F9/00 ,  C02F1/00 ,  C02F1/52 ,  C02F3/00

CPC classification number: C02F9/00 ,  C02F1/008 ,  C02F1/5209 ,  C02F3/006 ,  C02F1/66

Abstract: A method of treating selenium-containing wastewater comprises performing anoxic biological treatment of the selenium-containing wastewater to produce a first liquid including a residual dissolved selenium species, introducing an oxidant into the first liquid to form an oxidant-treated first liquid, introducing a coagulant into the oxidant-treated first liquid to form a second liquid having selenium-containing solids, and removing the selenium-containing solids from the second liquid in a solids-liquid separation operation.

公开(公告)号：US20230406734A1

公开(公告)日：2023-12-21

申请号：US18037077

申请日：2021-11-12

Applicant: Evoqua Water Technologies LLC

Inventor： Jacob Telepciak ,  Jonathan Wood ,  Krishna Kamath ,  Joshua Griffis ,  Nicholas Armstrong

IPC: C02F1/469

CPC classification number: C02F1/469 ,  C02F2101/108 ,  C02F2201/002 ,  C02F2201/46115

Abstract: Electrochemical water treatment devices are disclosed. The device includes an electrochemical separation module fluidly connectable to the source of water to be treated. The electrochemical separation module includes a first electrode, a second electrode, and a plurality of dilution compartments. Each of the dilution compartments includes a first region of ion exchange media having a first average particle size, a second region of ion exchange media having a second average particle size, and a third region of ion exchange media having a third average particle size. A volume of the second region of ion exchange media being greater than or equal to a total volume of the first and third regions of ion exchange media. Methods of facilitating treatment of water containing weakly ionized species, e.g., dissolved boron containing species and dissolved silica containing species, are disclosed. Electrochemical separation modules are also disclosed.

公开(公告)号：US11820689B2

公开(公告)日：2023-11-21

申请号：US16641026

申请日：2018-08-20

Applicant: Evoqua Water Technologies LLC

Inventor： Gary C. Ganzi ,  Frederick C. Wilkins

IPC: B01D61/02 ,  B01D61/08 ,  B01D61/54 ,  B01D61/58 ,  C02F1/00 ,  C02F1/44 ,  C02F1/467 ,  C02F1/469 ,  C02F9/00 ,  B01D61/46 ,  C02F1/20 ,  C02F1/66 ,  C02F101/10 ,  C02F101/12 ,  C02F101/16 ,  C02F103/08

CPC classification number: C02F9/00 ,  B01D61/027 ,  B01D61/08 ,  B01D61/46 ,  B01D61/54 ,  B01D61/58 ,  B01D2311/06 ,  B01D2311/08 ,  B01D2311/12 ,  B01D2311/2642 ,  B01D2311/2649 ,  B01D2311/2684 ,  B01D2317/025 ,  B01D2317/08 ,  C02F1/004 ,  C02F1/008 ,  C02F1/20 ,  C02F1/442 ,  C02F1/4674 ,  C02F1/4693 ,  C02F1/66 ,  C02F2001/007 ,  C02F2101/103 ,  C02F2101/106 ,  C02F2101/108 ,  C02F2101/12 ,  C02F2101/163 ,  C02F2103/08 ,  C02F2209/40

Abstract: Water treatment systems including electrically-driven and pressure-driven separation apparatus configured to produce a first treated water suitable for use as irrigation water and a second treated water suitable for use as potable water from one of brackish water and saline water and methods of operation of same.

公开(公告)号：US11802063B2

公开(公告)日：2023-10-31

申请号：US16491753

申请日：2018-03-06

Applicant: Evoqua Water Technologies LLC

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

IPC: 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: 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：US20230322590A1

公开(公告)日：2023-10-12

申请号：US18169102

申请日：2023-02-14

Applicant: EVOQUA WATER TECHNOLOGIES LLC

Inventor： Lars Nupnau

IPC: C02F1/467 ,  B63J4/00 ,  C02F1/00

CPC classification number: C02F1/4674 ,  B63J4/002 ,  C02F1/001 ,  C02F1/283

Abstract: Techniques and systems for neutralizing discharge waters from ballast and/or cooling water biocidal treatment and disinfection systems are provided. The systems utilize, inter alia, oxidation reduction potential control to regulate the dechlorination of an electrocatalytically generated biocidal agent to allowable discharge levels in ship buoyancy systems and ship cooling water systems

公开(公告)号：US11772993B2

公开(公告)日：2023-10-03

申请号：US17575057

申请日：2022-01-13

Applicant: Evoqua Water Technologies LLC

Inventor： Rohan Wikramanayake ,  Raymond G. Pepin ,  Thomas Miles

IPC: C02F3/12 ,  C02F1/52 ,  C02F1/56 ,  C02F1/66 ,  C02F3/00 ,  C02F101/20

CPC classification number: C02F3/1226 ,  C02F1/5209 ,  C02F1/5236 ,  C02F1/56 ,  C02F1/66 ,  C02F2003/003 ,  C02F2101/20 ,  C02F2209/06 ,  C02F2305/12 ,  Y02W10/10

Abstract: A system for treating metal-contaminated wastewater includes a primary treatment sub-system, a secondary treatment sub-system, and a tertiary treatment sub-system. The tertiary treatment sub-system includes a reactor tank, a source of ballast material, a source of coagulant, a solids-liquid separator, and a controller configured to recycle ballasted solids from the solids-liquid separator to the reactor tank an amount sufficient to generate metal hydroxide floc in the reactor tank to reduce a concentration of dissolved metal in the reactor tank.

公开(公告)号：US11753322B2

公开(公告)日：2023-09-12

申请号：US16862870

申请日：2020-04-30

Applicant: Evoqua Water Technologies LLC

Inventor： Sergio Pino Jelcic

IPC: C02F3/00 ,  C02F3/04 ,  C02F3/06 ,  C02F3/08 ,  C02F3/12 ,  C02F3/28 ,  C02F1/48 ,  C02F1/52 ,  C02F1/56

CPC classification number: C02F3/006 ,  C02F1/48 ,  C02F1/5236 ,  C02F1/56 ,  C02F3/04 ,  C02F3/06 ,  C02F3/082 ,  C02F3/12 ,  C02F3/2806 ,  C02F3/085 ,  C02F3/2826 ,  C02F3/2833 ,  C02F2209/001 ,  C02F2209/003 ,  C02F2209/005 ,  C02F2209/08 ,  C02F2209/10 ,  C02F2209/14 ,  C02F2209/15 ,  C02F2209/36 ,  C02F2209/40 ,  C02F2301/043 ,  C02F2305/12 ,  Y02W10/10

Abstract: A system and method of treating wastewater. In one embodiment, the system comprises a biological reactor fluidly connected to a source of wastewater and having a treated wastewater outlet, a fixed film biological reactor connected to the source of wastewater and having a fixed film effluent outlet, and a ballasted system fluidly connected to the fixed film effluent outlet. The ballasted system may comprise a ballast reactor tank configured to provide a ballasted effluent, and a source of ballast material fluidly connected to an inlet of the ballast reactor tank. The system may further comprise a bypass line having an inlet fluidly connected to the source of wastewater, a first outlet fluidly connected to the ballasted system, and a second outlet fluidly connected to the fixed film biological reactor, the bypass line configured to bypass the fixed film biological reactor.

公开(公告)号：US20230191288A1

公开(公告)日：2023-06-22

申请号：US17907967

申请日：2021-09-14

Applicant: Evoqua Water Technologies LLC

Inventor： DONALD J. THIEL ,  JEFFREY P. GERMAIT ,  GOVARDHAN R. KATTA ,  ALLEN LEPAK

IPC: B01D21/24 ,  B01D21/34 ,  B01D21/08

CPC classification number: B01D21/2427 ,  B01D21/245 ,  B01D21/34 ,  B01D21/08

Abstract: An apparatus for wasting flocculant sludge from a clarifier is provided including a wasting pipe fluidly connectable to a waste conduit, a manifold fluidly connectable to the wasting pipe, an upper header for collecting the flocculant sludge fluidly connectable to the manifold, a return sludge pipe fluidly connectable to a return sludge well, a lower header for collecting settled sludge fluidly connectable to the return sludge pipe, and a drive mechanism for rotating the upper header and the lower header about a center axis. A wastewater treatment system is provided including the clarifier fluidly connectable to a source of a mixed liquor and the apparatus for wasting flocculant sludge. A method of separating settled sludge from a clarifier is provided including withdrawing flocculant sludge and withdrawing settled sludge. A method of retrofitting a clarifier is also provided including providing the manifold, the upper header, and the drive mechanism.