公开(公告)号：US20250042796A1

公开(公告)日：2025-02-06

申请号：US18714699

申请日：2023-01-27

Applicant: Evoqua Water Technologies LLC ,  EVOQUA WATER TECHNOLOGIES LLC

Inventor： Robert J. Wenta

IPC: C02F9/00 ,  C02F3/12 ,  C02F11/121 ,  C02F11/143

Abstract: A method of treating wastewater comprises performing biological treatment of the wastewater to generate a sludge, adding a ballasting agent to the sludge to form a ballasted sludge, and performing solid-liquid separation of a first portion of the ballasted sludge using a dissolved air flotation process to form a solids-rich concentrated sludge and a solids-lean effluent.

公开(公告)号：US12246979B2

公开(公告)日：2025-03-11

申请号：US18205689

申请日：2023-06-05

Applicant: Evoqua Water Technologies LLC

Inventor： Christopher Hall ,  Bruce Lee Coulter

IPC: C02F9/00 ,  C02F1/32 ,  C02F1/00 ,  C02F1/04 ,  C02F1/20 ,  C02F1/42 ,  C02F1/44 ,  C02F1/469 ,  C02F1/70 ,  C02F1/72 ,  C02F103/04 ,  C02F103/34

Abstract: A method and system of providing ultrapure water for semiconductor fabrication operations is provided. The water is treated by utilizing a free radical scavenging system. The free radical scavenging system can utilize actinic radiation with a free radical precursor compound, such as ammonium persulfate. The ultrapure water may be further treated by utilizing ion exchange media and degasification apparatus. A control system can be utilized to regulate a continuously variable intensity of the actinic radiation.

公开(公告)号：US12227442B2

公开(公告)日：2025-02-18

申请号：US18515814

申请日：2023-11-21

Applicant: Evoqua Water Technologies LLC

Inventor： Gary C. Ganzi ,  Frederick C. Wilkins

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

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：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：US12111300B2

公开(公告)日：2024-10-08

申请号：US17632233

申请日：2020-07-31

Applicant: Evoqua Water Technologies LLC

Inventor： Philip Tinsley Dempster

IPC: G01N33/00 ,  G01N29/024 ,  G01N29/32 ,  G01N29/34

CPC classification number: G01N33/0039 ,  G01N29/024 ,  G01N29/326 ,  G01N29/345 ,  G01N29/348 ,  G01N33/0004 ,  G01N2291/021 ,  G01N2291/0215 ,  G01N2291/02809 ,  G01N2291/02881 ,  G01N2291/102

Abstract: A gas analyzer uses continuous sonic signals through a conduit to determine the composition of a gas in the conduit. A transmitting transducer drives sonic signals at a fixed frequency and a second transducer receives the sonic signals. The phase shift between two signals corresponds to the speed of sound through the gas and is related to the composition of the gas. The electronic versions of these signals are processed by lowering, or dividing, the fixed frequency which expands the range of phase shift measurement and allows the determination of an expanded range for the gas composition. In an ozone generation system, the gas analyzer is highly suitable for determining the composition of gases derived from air as a gas of known composition and a calibration point.

公开(公告)号：US12084363B2

公开(公告)日：2024-09-10

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 ,  C02F1/28 ,  C02F1/32 ,  C02F1/70 ,  C02F103/00 ,  C02F103/02

CPC classification number: C02F1/4674 ,  B63J4/002 ,  C02F1/001 ,  C02F1/283 ,  C02F1/32 ,  C02F1/705 ,  C02F2103/008 ,  C02F2103/023 ,  C02F2201/46135 ,  C02F2201/4614 ,  C02F2201/46145 ,  C02F2201/4617 ,  C02F2209/001 ,  C02F2209/003 ,  C02F2209/04 ,  C02F2303/04 ,  C02F2303/185 ,  C02F2303/20

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：US20240279093A1

公开(公告)日：2024-08-22

申请号：US18560849

申请日：2022-08-04

Applicant: Evoqua Water Technologies LLC

Inventor： Michael R. Riffe ,  Palanivel Muthusamy ,  Umar Basheer ,  Pratheesh P. Perumal ,  Tulasiram Yama ,  Sharath Ramesh ,  Viswanathan Sampath ,  Suthahar Manoharan ,  Raymund E. Mears ,  Theodore Kocol ,  Gopinath Rajendran ,  Joseph A. Herbst ,  Timothy S. Crofton ,  James R. Goodwin ,  Steven R. Lambert ,  Andrew M. Crowther

IPC: C02F3/00 ,  C02F1/00

CPC classification number: C02F3/006 ,  C02F1/006 ,  C02F2209/40

Abstract: An apparatus for diffusing wastewater into a clarifier is disclosed. The apparatus has a rotationally symmetric hollow body having a plurality of flow distributors positioned about a perimeter of the rotationally symmetric hollow body and a baffle extending around a bottom end portion of the rotationally symmetric hollow body. The apparatus is dimensioned to fit within an influent well of the clarifier and be connectable to the clarifier on a top end portion of the rotationally symmetric hollow body. A wastewater treatment system including a clarifier and the apparatus is disclosed. A method of retrofitting a circular clarifier by providing the apparatus is also disclosed.

公开(公告)号：US20240216837A1

公开(公告)日：2024-07-04

申请号：US18282601

申请日：2022-03-18

Applicant: Evoqua Water Technologies LLC

Inventor： Chad Massel

IPC: B01D25/21

CPC classification number: B01D25/215

Abstract: A method of retrofitting a filter plate including a filtration zone and a frame surrounding the filtration zone for use in a filter press. The frame of the filter plate is altered to removably receive a filtrate cartridge, the filtrate cartridge constructed and arranged to facilitate flow out of a filtration chamber of the filter press associated with the filtration zone to a discharge port. The filtrate cartridge is inserted in the frame. Related filter plates and filter presses are also disclosed.

公开(公告)号：US20240208848A1

公开(公告)日：2024-06-27

申请号：US18580974

申请日：2022-07-13

Applicant: EVOQUA WATER TECHNOLOGIES LLC

Inventor： Simon Paul Dukes ,  Savvas Hadjikyriacou

IPC: C02F9/00 ,  C02F1/02 ,  C02F1/28 ,  C02F1/44 ,  C02F1/72 ,  C02F101/10 ,  C02F101/16 ,  C02F101/36

CPC classification number: C02F9/00 ,  C02F1/02 ,  C02F1/283 ,  C02F1/285 ,  C02F1/44 ,  C02F1/72 ,  C02F2101/101 ,  C02F2101/16 ,  C02F2101/36 ,  C02F2303/16

Abstract: Methods of treating water containing PFAS are disclosed. The methods include dosing water containing PFAS with a removal material, e.g., adsorption media, to promote loading of the removal material, e.g., adsorption media, with PFAS. The methods include producing a slurry stream including the PFAS-loaded removal material. e.g., adsorption media. The methods include subjecting the slurry stream to a supercritical water oxidation (SCWO) process. The SCWO process is driven at least in part by a predetermined calorific value of the removal material, e.g., adsorption media. Systems for treating water containing PFAS are also disclosed. Systems include a contact reactor containing removal material. e.g., adsorption media; a source of water comprising PFAS fluidly connected to an inlet of the contact reactor; a separation system fluidly connected downstream of the contact reactor; and SCWO reactor fluidly connected downstream of the separation system.

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.