Patents Assigned to Evoqua Water Technologies
  • Publication number: 20220324724
    Abstract: A pressurized media vessel system for water treatment is disclosed. The vessel can contain either granular activated carbon (GAC) or ion exchange (IX) resin. The system includes a flanged inlet to introduce process water to the vessel for treatment. The flanged inlet is configured to interchangeably attach to different distributors depending on a desired mode of operation. The vessel may be filled with a GAC bed in a first mode of operation and may be filled with an IX resin media bed in a second mode of operation.
    Type: Application
    Filed: April 13, 2021
    Publication date: October 13, 2022
    Applicant: Evoqua Water Technologies LLC
    Inventors: John Lombardo, Nick Dohmen, Karen Tarbert, Daniel Brooks, Alexis Adair
  • Publication number: 20220306498
    Abstract: Water treatment systems are disclosed. The system includes an electrochemical cell having an inlet and an outlet, a cathode comprising a catalytic material for electrochemical generation of persulfate free radicals, and an anode, a source of a persulfate positioned upstream of the electrochemical cell, first contaminant concentration sensor positioned upstream of the electrochemical cell, and a controller operatively coupled to receive one or more input signals from at least the first contaminant concentration sensor. Methods of treating water using the electrochemical cell disclosed herein are disclosed. Methods of facilitating water treatment by providing the electrochemical cell disclosed herein are disclosed. Methods of retrofitting a water treatment system having an AOP by providing the electrochemical cell disclosed herein are disclosed.
    Type: Application
    Filed: June 17, 2020
    Publication date: September 29, 2022
    Applicant: Evoqua Water Technologies LLC
    Inventor: YANG CHEN
  • Patent number: 11453602
    Abstract: Systems and method for treating wastewater including a vessel having an inlet and an outlet, a pump in fluid communication with the outlet of the vessel, the pump configured to pump wastewater out of the vessel, a separator in fluid communication with the pump, the separator configured to separate grit from the wastewater, the separator having a first outlet for discharging a grit stream and a second outlet for discharging a wastewater stream, a grit washing system in fluid communication with a source of washing fluid and the first outlet of the separator, the grit washing system configured to wash and dewater grit from the grit stream, the grit washing system having an outlet for discharging a wash wastewater stream, and a return conduit configured to recycle the wastewater stream discharged from the separator to one of the inlet of the vessel and an inlet to the pump.
    Type: Grant
    Filed: July 10, 2018
    Date of Patent: September 27, 2022
    Assignee: Evoqua Water Technologies LLC
    Inventors: Matthew Bronk, Argun Olcayto Erdogan, Nathan Antonneau
  • Publication number: 20220298045
    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.
    Type: Application
    Filed: August 26, 2020
    Publication date: September 22, 2022
    Applicant: Evoqua Water Technologies LLC
    Inventors: FRANK L. SASSAMAN, ALAN KNAPP
  • Patent number: 11447404
    Abstract: A method of treating water in a water treatment system after a replacement of an ion exchange bed includes introducing water to be treated into the ion exchange bed of the water treatment system to produce treated water, calculating a current exchange daily average flow rate of water through the water treatment system, calculating a cumulative daily average flow rate of water through the water treatment system, and determining an estimated number of days remaining to exhaustion of the ion exchange bed based on the current exchange daily average flow rate and the cumulative daily average flow rate.
    Type: Grant
    Filed: March 17, 2020
    Date of Patent: September 20, 2022
    Assignee: Evoqua Water Technologies LLC
    Inventors: Erich G. Hoefferle, Isabel Rozario, Stephen Mildner
  • Patent number: 11447408
    Abstract: A wastewater treatment system including a contact tank, a dissolved air flotation unit, a fixed film reactor, and a solids-liquid separation unit is disclosed. A method of treating wastewater with a dissolved air flotation unit and a fixed film reactor is also disclosed. A method of retrofitting a fixed film reactor wastewater treatment system including providing a contact tank and a dissolved air flotation unit is also disclosed. A method of facilitating increased operating efficiency of a fixed film wastewater treatment system including providing a dissolved air flotation unit is also disclosed.
    Type: Grant
    Filed: June 4, 2019
    Date of Patent: September 20, 2022
    Assignee: Evoqua Water Technologies LLC
    Inventors: Argun O. Erdogan, Michael L. Doyle, Deborah Hyke
  • Patent number: 11440812
    Abstract: A cover for a wastewater treatment unit is disclosed. The cover may include a retractable awning, a frame, and at least one rotating shaft. The retractable awning may be configured to cover the wastewater treatment unit when extended and allow access to the wastewater treatment unit when retracted. The retractable awning may be configured to protect the wastewater treatment unit from ultraviolet light. The frame may be provided to support the retractable awning above the wastewater treatment unit at an incline angle. The angle may allow visibility into the wastewater treatment unit when the retractable awning is extended. The frame may further include a handrail. A system including the wastewater treatment unit positioned within a basin and the cover is also disclosed. Methods of retrofitting a wastewater treatment system and methods of facilitating protection of a wastewater treatment unit are also disclosed.
    Type: Grant
    Filed: October 2, 2018
    Date of Patent: September 13, 2022
    Assignee: Evoqua Water Technologies LLC
    Inventor: Brent M. Howe
  • Patent number: 11420161
    Abstract: A system for removing undesirable compounds from contaminated air includes a biofilter having an alkaline material introduction system and a fuzzy-logic based controller. A contaminant, such as hydrogen sulfide, is removed from contaminated air by passing the contaminated air through the biofilter.
    Type: Grant
    Filed: May 29, 2020
    Date of Patent: August 23, 2022
    Assignee: Evoqua Water Technologies LLC
    Inventor: James Vaughan Harshman
  • Publication number: 20220259044
    Abstract: An ozone generation system which is adaptable for supplying ozone to different medium and small application processes. The system has a source of feed gas, a corona discharge cell receiving the feed gas from the feed gas source and generating ozone for the application process, a flow controller measuring and managing the flow of the feed gas from the feed gas source to the corona discharge cell; and a regulator receiving gas from the corona discharge cell and sending the gas to the application process. The regulator maintains pressure in the corona discharge cell independent of the application process pressure.
    Type: Application
    Filed: September 9, 2021
    Publication date: August 18, 2022
    Applicant: Evoqua Water Technologies LLC
    Inventor: Philip Tinsley Dempster
  • Publication number: 20220259085
    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.
    Type: Application
    Filed: August 21, 2019
    Publication date: August 18, 2022
    Applicant: Evoqua Water Technologies LLC
    Inventors: Hao Dang, Wenxin Du, George Y. Gu, Michael J. Shaw, Simon P. Dukes
  • Publication number: 20220258962
    Abstract: The segmented cover is made of juxtaposed cover segments mounted over a wastewater reservoir. Floating beams define each of these cover segments, and a floating membrane is removably mounted to the floating beams over each of the cover segments. The floating beams are enclosed in a common sealed tubular envelope, which is connected to gas-impermeable connections joining the floating beams to a wall-covering skirt and to the perimeter walls of the reservoir. Because of the sealed continuous tubular envelope enclosing the floating beams, the wall-covering skirt and the gas-impermeable connections, each segment of the cover is independently sealed from outside environment and from an adjoining segment. Biogas collection from the wastewater reservoir can be maintained even when one segment of the cover is open.
    Type: Application
    Filed: February 12, 2021
    Publication date: August 18, 2022
    Applicant: Evoqua Water Technologies LLC
    Inventors: Victor Cormier, Darin Evans
  • Patent number: 11414330
    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.
    Type: Grant
    Filed: March 6, 2018
    Date of Patent: August 16, 2022
    Assignee: Evoqua Water Technologies LLC
    Inventors: Simon Paul Dukes, George Gu, Joshua Griffis, Michael Shaw
  • Publication number: 20220250956
    Abstract: A wastewater treatment system comprises an actinic radiation reactor and a concentric tube electrode electrochemical cell in fluid communication between a source of electrolyte and the actinic radiation reactor. The electrochemical cell is configured to produce a chlorinated effluent including sodium hypochlorite. A conduit fluidically couples an outlet of the electrochemical cell to an inlet of the actinic radiation reactor and is configured to deliver the chlorinated effluent into the actinic radiation reactor.
    Type: Application
    Filed: March 13, 2020
    Publication date: August 11, 2022
    Applicant: Evoqua Water Technologies LLC
    Inventors: JOSHUA GRIFFIS, SIMON P. DUKES, BENJAMIN SATTERFIELD
  • Patent number: 11400412
    Abstract: A biofilter irrigation system comprises a cylindrical vessel having a central axis, a media bed positioned within the vessel, a spray head system positioned above the media bed, the spray head system comprising a central hub positioned at the central axis of the vessel, at least one arm extending distally from the central hub toward a wall of the vessel and configured to rotate about the central axis, and a plurality of nozzles connected to the at least one arm. The biofilter irrigation system further comprises a fluid outlet positioned below the media bed.
    Type: Grant
    Filed: February 12, 2016
    Date of Patent: August 2, 2022
    Assignee: Evoqua Water Technologies LLC
    Inventors: Michael Sumner Murphy, James Paul Harshman, Eric Carl Hansen
  • Publication number: 20220234004
    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.
    Type: Application
    Filed: April 12, 2022
    Publication date: July 28, 2022
    Applicant: Evoqua Water Technologies LLC
    Inventors: Li-Shiang Liang, Michael J. Shaw, Wenxin Du
  • Patent number: 11390549
    Abstract: A filter press includes a plurality of filter plates, a hydraulic cylinder, a follower plate through which the hydraulic cylinder is configured to apply pressure to the plurality of filter plates, and a spacer rod configured to transfer force from the hydraulic cylinder to the follower plate. The spacer rod is coupled to the follower plate by a moveable support that is displaceable between a home position in which the spacer rod is aligned with the hydraulic cylinder and a disengaged position in which the spacer rod is unaligned with the hydraulic cylinder.
    Type: Grant
    Filed: February 19, 2018
    Date of Patent: July 19, 2022
    Assignee: Evoqua Water Technologies LLC
    Inventors: Chad Massel, Jason Letherby
  • Patent number: 11384441
    Abstract: An electrochemical cell includes a housing having an inlet, an outlet, and a central axis and an anode-cathode pair disposed concentrically within the housing about the central axis and defining an active area between an anode and a cathode of the anode-cathode pair. An active surface area of at least one of the anode and the cathode has a surface area greater than a surface area of an internal surface of the housing. The anode-cathode pair is configured and arranged to direct all fluid passing through the electrochemical cell axially through the active area.
    Type: Grant
    Filed: December 23, 2019
    Date of Patent: July 12, 2022
    Assignee: Evoqua Water Technologies LLC
    Inventors: Paul Beddoes, Li-Shiang Liang, Andrew Green, Jacob Telepciak, Joshua W. Griffis, Simon P. Dukes
  • Publication number: 20220212973
    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.
    Type: Application
    Filed: March 25, 2022
    Publication date: July 7, 2022
    Applicant: Evoqua Water Technologies LLC
    Inventor: Nathan Antonneau
  • Patent number: 11377351
    Abstract: An ozone generation system which is adaptable for supplying ozone to different medium and small application processes. The system has a source of feed gas, a corona discharge cell receiving the feed gas from the feed gas source and generating ozone for the application process, a flow controller measuring and managing the flow of the feed gas from the feed gas source to the corona discharge cell; and a regulator receiving gas from the corona discharge cell and sending the gas to the application process. The regulator maintains pressure in the corona discharge cell independent of the application process pressure.
    Type: Grant
    Filed: December 10, 2019
    Date of Patent: July 5, 2022
    Assignee: Evoqua Water Technologies LLC
    Inventor: Philip Tinsley Dempster
  • Patent number: 11365139
    Abstract: Systems and methods for removing heavy metals such as selenium from wastewater with zero valent iron media. Air may be introduced directly into a reaction zone of a fluidized bed reactor filled with the media to catalyze treatment.
    Type: Grant
    Filed: November 22, 2019
    Date of Patent: June 21, 2022
    Assignees: Evoqua Water Technologies LLC, The Texas A&M University System
    Inventors: Michael W. Wismer, Samuel A. Mason, Yongheng Huang