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公开(公告)号：US20220388874A1
公开(公告)日：2022-12-08
申请号：US17775308
申请日：2020-11-06
Applicant: Evoqua Water Technologies LLC
Inventor： SIMON DUKES , HAO DANG , WENXIN DU
Abstract: A water treatment system comprises a source of water including one or more contaminants, an electrocoagulation cell including a housing defining a fluid flow conduit, an anode disposed within the fluid flow conduit, and a cathode disposed within the fluid flow conduit, the housing including an inlet fluidly connectable to the source of water and an outlet, a solids/liquid separation system having an inlet fluidly connectable to the outlet of the housing of the electrocoagulation cell, a solids-rich outlet, and a solids-lean outlet, and a ballast feed system configured to deliver a ballast to the solids/liquid separation system.
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公开(公告)号：US20220298045A1
公开(公告)日：2022-09-22
申请号：US17638853
申请日：2020-08-26
Applicant: Evoqua Water Technologies LLC
Inventor： FRANK L. SASSAMAN , ALAN KNAPP
IPC: C02F9/00
Abstract: Methods of treating CMP wastewater comprising azoles are disclosed. The method includes providing the wastewater having a first azole concentration, introducing the wastewater to an inlet of a wastewater treatment system constructed and arranged to produce and introduce free radicals into the wastewater, and activating the wastewater treatment system to produce and introduce the free radicals into the wastewater in an amount sufficient to reduce the azole concentration in the wastewater and produce treated water having a second azole concentration, less than the first azole concentration. Methods of facilitating treatment of CMP wastewater comprising azoles by providing a water treatment system constructed and arranged to produce and introduce free radicals into the wastewater are disclosed.
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公开(公告)号：US20220268736A1
公开(公告)日：2022-08-25
申请号：US17632233
申请日：2020-07-31
Applicant: Evoqua Water Technologies LLC
Inventor： PHILLIP TINSLEY DEMPSTER
IPC: G01N29/024 , G01N29/34 , G01N33/00
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.
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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.
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公开(公告)号：US20220212973A1
公开(公告)日：2022-07-07
申请号：US17704643
申请日：2022-03-25
Applicant: Evoqua Water Technologies LLC
Inventor： Nathan Antonneau
IPC: C02F9/00
Abstract: A wastewater treatment system including a contact tank, a dissolved air flotation unit, a fermentation unit, and a biological treatment unit is disclosed. A method of retrofitting a wastewater treatment system by arranging the wastewater treatment system such that floated biosolids are fermented in an anerobic environment and fluidly connecting the biological treatment unit to receive at least a portion of the fermented solids is also disclosed. The method optionally includes providing a fermentation unit and fluidly connecting the fermentation unit to a biological treatment unit. A method of treating wastewater including combining the wastewater with activated sludge, floating biosolids from the activated wastewater, fermenting the floated biosolids, and biologically treating the effluent with the fermented solids is also disclosed. A method of facilitating delivery of soluble organic carbon to a biological treatment unit is also disclosed.
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Patent Agency Ranking
公开(公告)号：US11299415B2
公开(公告)日：2022-04-12
申请号：US16979855
申请日：2019-03-12
Applicant: Evoqua Water Technologies LLC
Inventor： Nathan Antonneau
Abstract: A wastewater treatment system including a contact tank, a dissolved air flotation unit, a fermentation unit, and a biological treatment unit is disclosed. A method of retrofitting a wastewater treatment system by arranging the wastewater treatment system such that floated biosolids are fermented in an anerobic environment and fluidly connecting the biological treatment unit to receive at least a portion of the fermented solids is also disclosed. The method optionally includes providing a fermentation unit and fluidly connecting the fermentation unit to a biological treatment unit. A method of treating wastewater including combining the wastewater with activated sludge, floating biosolids from the activated wastewater, fermenting the floated biosolids, and biologically treating the effluent with the fermented solids is also disclosed. A method of facilitating delivery of soluble organic carbon to a biological treatment unit is also disclosed.
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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
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.
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公开(公告)号：US20220002172A1
公开(公告)日：2022-01-06
申请号：US17480221
申请日：2021-09-21
Applicant: Evoqua Water Technologies LLC
Inventor： Lars NUPNAU
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
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公开(公告)号：US20210403358A1
公开(公告)日：2021-12-30
申请号：US17290246
申请日：2019-10-29
Applicant: Evoqua Water Technologies LLC
Inventor： Glen P. Sundstrom
Abstract: A method including directing an aqueous solution having dissolved carbon dioxide and dissolved ozone into a vessel, removing an amount of the dissolved carbon dioxide and irradiating the effluent with ultraviolet light to decompose an amount of the dissolved ozone is disclosed. The method may include removing the dissolved carbon dioxide by controlling pH. The method may include removing the dissolved carbon dioxide by contact with a membrane degasifier. A system including a channel fluidly connectable to a source of an aqueous solution having dissolved carbon dioxide and dissolved ozone, a dissolved carbon dioxide removal subsystem, and a source of ultraviolet irradiation is also disclosed. The dissolved carbon dioxide removal subsystem may include a source of a pH adjuster. The dissolved carbon dioxide removal subsystem may include a membrane degasifier.
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公开(公告)号：US20210395911A1
公开(公告)日：2021-12-23
申请号：US16491781
申请日：2018-03-06
Applicant: Evoqua Water Technologies LLC
Inventor： Simon Paul Dukes , George Gu , Joshua Griffis , Michael Shaw
IPC: C25B15/029 , C25B1/04
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 reversing polarity of the anode and the cathode 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 reverse polarity 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.
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