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    Method for the treatment of wastewater
    31.
    发明授权
    Method for the treatment of wastewater 有权

    公开(公告)号：US11198625B2

    公开(公告)日：2021-12-14

    申请号：US16299691

    申请日：2019-03-12

    Applicant: Evoqua Water Technologies LLC

    Inventor： Gerard Willem Smiddy ,  Frank Leslie Smiddy

    IPC: C02F1/74 ,  C02F1/28 ,  C02F9/00 ,  C02F1/00 ,  C02F1/38 ,  C02F1/52 ,  C02F101/20 ,  C02F101/32 ,  C02F103/10

    Abstract: A system and method for backwashing a sand filter in a wastewater treatment system. In one aspect, the invention can be a system for backwashing a sand filter comprising: a sand filter configured to remove solids from an untreated wastewater; a container storing chlorine fluidly coupled to the sand filter by a chlorine supply manifold; a flow control mechanism positioned on the chlorine supply manifold between the container and the sand filter, the flow control mechanism alterable between a first position whereby chlorine cannot flow from the container to the sand filter and a second position whereby chlorine flows from the container to the sand filter, the flow control mechanism being biased into the first position; and a processor operably coupled to the flow control mechanism and configured to automatically actuate the flow control mechanism into the second position upon detecting that the sand filter is being backwashed.

    Ion exchange membrane through UV initiation polymetrization
    32.
    发明申请
    Ion exchange membrane through UV initiation polymetrization 有权

    公开(公告)号：US20210340343A1

    公开(公告)日：2021-11-04

    申请号：US17280179

    申请日：2019-09-25

    Applicant: Evoqua Water Technologies LLC

    Inventor： George Gu ,  Simon P. Dukes ,  Savvas Hadjikyriacou ,  Michael Shaw

    IPC: C08J5/22 ,  B01D69/12 ,  B01D69/10 ,  B01D69/02

    Abstract: Methods of producing an ion exchange membrane support are disclosed. The methods include saturating a polymeric microporous substrate with a charged monomer solution comprising at least one functional monomer, a cross-linking agent, and an effective amount of at least one photopolymerization initiator and polymerizing the at least one functional monomer by exposing the saturated polymeric microporous substrate to ultraviolet light under conditions effective to cross-link the at least one functional monomer and produce the ion exchange membrane support. Methods of producing a monovalent selective ion exchange membrane are also disclosed. The methods include functionalizing an exterior surface of the ion exchange membrane support with a charged compound layer, drying the ion exchange membrane support and soaking the ion exchange membrane support in a solution comprising an acid or a base for an amount of time effective to produce the monovalent selective ion exchange membrane.

    High Recovery Electrodialysis Method
    33.
    发明申请
    High Recovery Electrodialysis Method 有权

    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.

    Method and system for treating ultrapure water
    34.
    发明授权
    Method and system for treating ultrapure water 有权

    公开(公告)号：US11072545B2

    公开(公告)日：2021-07-27

    申请号：US16333280

    申请日：2017-09-15

    Applicant: EVOQUA WATER TECHNOLOGIES LLC

    Inventor： Boris Eliosov ,  Glen P. Sundstrom ,  Bruce L. Coulter

    IPC: C02F1/44 ,  B01D61/18 ,  B01D61/22 ,  B01D63/02 ,  C02F103/04

    Abstract: According to various aspects and embodiments, a system and method for polishing ultrapure water (UPW) is disclosed. The water polishing system includes a source of ultrapure water (UPW), an ultrafiltration (UF) module having an inlet and a permeate outlet, a recirculation conduit communicating the permeate outlet with the inlet and forming a recirculation loop, a recirculation pump disposed along the recirculation conduit upstream from the inlet of the UF module and fluidly coupled to the source of UPW, a supply conduit fluidly coupled to the recirculating conduit and a demand source, the supply conduit positioned downstream from the permeate outlet, and a pressure control valve disposed along the recirculation conduit downstream from the supply conduit and configured to maintain pressure of permeate at a predetermined value.

    Method and apparatus to monitor and control a water system
    35.
    发明授权
    Method and apparatus to monitor and control a water system 有权

    公开(公告)号：US11053136B2

    公开(公告)日：2021-07-06

    申请号：US16243917

    申请日：2019-01-09

    Applicant: Evoqua Water Technologies LLC

    Inventor： Scott Branum ,  Erich Hoefferle

    IPC: C02F1/00 ,  G01N33/18 ,  C02F1/42 ,  G06Q20/14 ,  G06Q50/06 ,  G01N27/06

    Abstract: A system for providing treated water includes a water treatment unit including an inlet water quality probe, a worker bed, a probe to measure a parameter of water from the worker bed, a polisher bed connected downstream from the worker bed and having a probe to measure a parameter of water from the polisher bed, and a flow meter upstream of the worker bed or downstream of the polisher bed. A controller in communication with the flow meter and the probes is configured to receive data from same. A remote server in communication with the local water treatment unit is configured to receive data from the local water treatment unit. The controller or the server may determine a cumulative flow total, a billing cycle flow total, a current exchange flow total, a contaminant load, or a remaining capacity of the water treatment unit.

    Systems and Methods for Measuring Composition of Water
    36.
    发明申请
    Systems and Methods for Measuring Composition of Water 有权

    公开(公告)号：US20210181167A1

    公开(公告)日：2021-06-17

    申请号：US17268450

    申请日：2019-08-13

    Applicant: Evoqua Water Technologies LLC

    Inventor： Glen P. Sundstrom

    IPC: G01N31/10 ,  C02F1/00 ,  C02F1/44 ,  C02F1/20 ,  C02F1/42 ,  G01N33/18

    Abstract: A method of determining composition of an aqueous solution is disclosed. The method includes obtaining the aqueous solution, removing oxygen from the aqueous solution, determining concentration of dissolved oxygen, removing hydrogen peroxide from the aqueous solution, and determining concentration of dissolved oxygen. The method includes calculating the difference between the concentrations of dissolved oxygen to determine concentration of hydrogen peroxide. A system for determining composition of an aqueous solution is also disclosed. The system includes a feed line connectable to a source of the aqueous solution, an oxygen removal unit, a hydrogen peroxide removal unit, and dissolved oxygen analyzers.

    Treatment of Liquid Streams containing High concentration of Solids utilizing Ballasted Floc Technology
    39.
    发明申请
    Treatment of Liquid Streams containing High concentration of Solids utilizing Ballasted Floc Technology 审中-公开

    公开(公告)号：US20200255308A1

    公开(公告)日：2020-08-13

    申请号：US16639913

    申请日：2018-08-17

    Applicant: Evoqua Water Technologies LLC

    Inventor： Paul Hoeferlin ,  Michael R. Riffe ,  Frank L. Sassaman

    IPC: C02F1/52 ,  C02F1/28 ,  C02F1/48 ,  C02F1/56 ,  C02F11/122

    Abstract: A high-solids wastewater treatment system is disclosed. The wastewater treatment system includes a ballasted reactor, a solids-liquid separation subsystem, a pre-treatment subsystem, a ballast feed subsystem, and a ballast recovery subsystem. The high-solids wastewater treatment system can include a reaction tank, a thickener, and a filter press. A method of treating high-solids wastewater is also disclosed. The method includes contacting a wastewater feed with a coagulant or flocculant, thickening the dosed wastewater, treating the effluent with a ballast, settling the treated wastewater, and conveying the ballasted sludge to the wastewater feed, dosed wastewater, or treated wastewater. The wastewater feed may have more than 500 mg/L of total suspended solids. The wastewater feed may contain inorganic solids.

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