Patents Assigned to Evoqua Water Technologies LLC
  • Patent number: 11020735
    Abstract: Methods of stabilizing virgin ion exchange resin material are provided. The methods include rinsing virgin ion exchange resin material with deoxygenated water, introducing the rinsed virgin ion exchange resin material into a liquid impermeable compartment of a gas impermeable vessel and hermetically sealing the vessel. The methods include rinsing virgin ion exchange resin material with deoxygenated water, introducing the rinsed virgin ion exchange resin material into a gas impermeable vessel, introducing an oxygen scavenging material into the gas impermeable vessel, and hermetically sealing the vessel. A method of facilitating water treatment in a site in need thereof by providing rinsed virgin ion exchange resin material in deoxygenated water positioned in a liquid impermeable compartment of a gas impermeable vessel is also provided. A vessel containing deoxygenated water and virgin ion exchange resin material and an oxygen scavenging material is also provided.
    Type: Grant
    Filed: February 12, 2019
    Date of Patent: June 1, 2021
    Assignee: Evoqua Water Technologies LLC
    Inventors: James Buckner, Gregory Bachman
  • Publication number: 20210138368
    Abstract: The present invention relates to a filtering panel (100) for a disk filter and a disk filter for water purification, comprising a metal filter cloth (16, 116) such as a stainless steel filter cloth, pre-tensioned in both warp and weft directions and fastened to a frame (10, 110) comprising a peripheral portion (11, 111), which is integral with an inner grillwork (12) and which divides the inner area of the peripheral portion (11, 111) into fields (15, 115). The frame (10, 110) comprises a plastic material reinforced with glass fibers or carbon fibres such as polypropylene loaded with fibreglass in an amount of at least 20 weight percent. Each field of the grillwork (12, 112) has an area not exceeding 10% of the inner area of the peripheral portion (11, 111). The pre-tensioning of the filter cloth (16, 116) in both directions is from at least 20% of the yield stress of the cloth (16, 116).
    Type: Application
    Filed: November 24, 2020
    Publication date: May 13, 2021
    Applicant: Evoqua Water Technologies LLC
    Inventors: Marco Braschi, Roberto Negrini
  • Publication number: 20210139352
    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, for example, a cathode and an anode, a fluid channel defined between the concentric electrodes, a separator residing between the concentric electrodes, first and second end caps coupled to respective ends of the housing, and an inlet cone. The separators may be configured to localize the electrodes and dimensioned to minimize a zone of reduced velocity occurring downstream from the separator. The end caps and inlet cone may be dimensioned to maintain fully developed flow and minimize pressure drop across the electrochemical cell.
    Type: Application
    Filed: April 13, 2018
    Publication date: May 13, 2021
    Applicant: Evoqua Water Technologies LLC
    Inventors: Joshua Griffis, Andrew Green, Li-Shiang Liang, Paul Beddoes
  • Publication number: 20210139351
    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.
    Type: Application
    Filed: March 6, 2018
    Publication date: May 13, 2021
    Applicant: Evoqua Water Technologies LLC
    Inventors: George Gu, Simon Paul Dukes, Joshua Griffis, Michael Shaw
  • Patent number: 11000804
    Abstract: A system for removing undesirable compounds from contaminated air includes a biofilter having porous glass media. Hydrogen sulfide is removed from contaminated air by passing the contaminated air through the biofilter.
    Type: Grant
    Filed: June 10, 2020
    Date of Patent: May 11, 2021
    Assignee: Evoqua Water Technologies LLC
    Inventor: Timothy Frank Matheis
  • Publication number: 20210129059
    Abstract: According to various aspects and embodiments, a system and method for two-stage filtration is provided. The system includes an inlet fluidly connectable with wastewater, a first stage filter assembly that is fluidly connectable with the inlet and has a rotary drum with a filter surface configured for radially inward fluid flow, a second stage filter assembly that is fluidly connectable with the first stage filter and has a plurality of filter discs configured for radially outward fluid flow, and an outlet fluidly connectable with filtrate generated by the second stage disc filter assembly.
    Type: Application
    Filed: November 12, 2020
    Publication date: May 6, 2021
    Applicant: Evoqua Water Technologies LLC
    Inventors: Patrick Harden, Harry Bryant
  • Publication number: 20210130966
    Abstract: An electrochemical cell including a first chamber having an anode, a second chamber having a cathode, at least one ionic connection between the first chamber and the second chamber, such that liquid electrolyte from the first chamber is prevented from mixing with liquid electrolyte in the second chamber is provided. The first chamber and the second chamber can be arranged in parallel and positioned remotely from each other. An electrochemical system including the electrochemical cell, and first and second sources of saline aqueous solutions is also provided. Water treatment systems are also provided. A method of operating an electrochemical cell including introducing first and second saline aqueous solutions into first and second chambers of the electrochemical cell, and applying a current across the anode and the cathode to generate first and second products, respectively is also provided. A method of facilitating operation of an electrochemical cell is also provided.
    Type: Application
    Filed: March 6, 2018
    Publication date: May 6, 2021
    Applicant: Evoqua Water Technologies LLC
    Inventors: Joshua Griffis, George Gu, Simon P. Dukes
  • Publication number: 20210129048
    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: Application
    Filed: February 19, 2018
    Publication date: May 6, 2021
    Applicant: Evoqua Water Technologies LLC
    Inventors: Chad Massel, Jason Letherby
  • Publication number: 20210113961
    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: Application
    Filed: May 29, 2020
    Publication date: April 22, 2021
    Applicant: Evoqua Water Technologies LLC
    Inventor: James Vaughan Harshman
  • Patent number: 10981814
    Abstract: A method and system for treating wastewater is disclosed. In one example the method comprises activating a mixing system that imparts a motive force on wastewater in a vessel, measuring at least one property of a first portion of the wastewater at a first time, measuring the at least one property of a second portion of the wastewater at a second time subsequent to the first time, calculating a difference between the at least one property measured at the first time and the at least one property measured at the second time, performing a determination of whether the difference is within a predetermined allowable range of differences, and responsive to a result of the determination, controlling a component of the mixing system.
    Type: Grant
    Filed: December 8, 2017
    Date of Patent: April 20, 2021
    Assignee: Evoqua Water Technologies LLC
    Inventors: Christopher K. Waul, Argun Olcayto Erdogan
  • Publication number: 20210107812
    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.
    Type: Application
    Filed: April 13, 2018
    Publication date: April 15, 2021
    Applicant: Evoqua Water Technologies LLC
    Inventors: Andrew Green, Li-Shiang Liang, Joshua Griffis, Paul Beddoes
  • Publication number: 20210094852
    Abstract: Methods of treating wastewater with a sequencing batch reactor are disclosed. The methods include determining an anticipated flow rate of the wastewater and independently operating one or more reactor in a continuous flow mode responsive to the anticipated flow rate. Sequencing batch reactor systems are also disclosed. The systems include a plurality of reactors operating in parallel, a loading subsystem, a measuring subsystem, and a controller. The controller can be configured to independently operate each of the reactors in a batch flow mode or in a continuous flow mode responsive to the anticipated flow rate. Methods of retrofitting existing sequencing batch reactor systems and methods of facilitating treatment of wastewater with sequencing batch reactor systems are also disclosed.
    Type: Application
    Filed: April 24, 2019
    Publication date: April 1, 2021
    Applicant: Evoqua Water TEchnologies LLC
    Inventors: Kenneth L. Norcross, Nicholas A. Barczewski, Patrick T. Kelly
  • Publication number: 20210094754
    Abstract: A sludge digester including a vessel and floating cover. The vessel includes a sidewall and an interior volume configured to receive and contain sludge. According to one embodiment, the cover comprises a frame structure that is constructed and arranged to form a skirt member formed at a periphery of the cover and extending downwardly into the vessel, and a continuous ballast ring attached to a lower portion of the skirt member and configured to form a trough member with an interior surface of the skirt member. The sludge digester may also include a guide system coupled to the sidewall and the skirt member and configured to allow vertical displacement of the cover with change in volume of at least one of a gas and a sludge contained in the vessel beneath the cover.
    Type: Application
    Filed: May 14, 2020
    Publication date: April 1, 2021
    Applicant: Evoqua Water Technologies LLC
    Inventors: Matthew P. Bronk, Douglas N. Muller, Thomas Mangione
  • Patent number: 10961143
    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.
    Type: Grant
    Filed: May 4, 2016
    Date of Patent: March 30, 2021
    Assignee: Evoqua Water Technologies LLC
    Inventors: Christopher Hall, Bruce Lee Coulter
  • Publication number: 20210086138
    Abstract: A conditioning system for a filter module is disclosed. The conditioning system may generally include an inlet, a heat exchanger, a magnetically levitated pump, a channel provided to bypass the heat exchanger, a controller, an outlet, and a base. The system may have components lined with corrosion-resistant materials. A method of conditioning a filter module is also disclosed. The method may generally include measuring TOC in a source of ultrapure water, heating the ultrapure water, rinsing a filter module with the heated water, flushing the filter module with ambient temperature water, and repeating the rinsing with heated water and flushing with ambient temperature water. A method of facilitating conditioning of the filter module is also disclosed. The method may generally include providing a portable filter module conditioning system and providing instructions for installation or use.
    Type: Application
    Filed: December 20, 2018
    Publication date: March 25, 2021
    Applicant: Evoqua Water Technologies LLC
    Inventors: Michael Gullion, Christopher Hall, Joshua Hawley
  • Publication number: 20210087081
    Abstract: An electrochlorination system comprises a source of feed fluid, a product fluid outlet, and a plurality of electrochemical cells connected fluidically between the source of feed fluid and the product fluid outlet. The system is configured to operate at least one of the plurality of electrochemical cells at one of a first current density or a first flow rate, and to operate another of the plurality of electrochemical cells at a second current density or second flow rate different from the respective first current density or first flow rate.
    Type: Application
    Filed: February 22, 2019
    Publication date: March 25, 2021
    Applicants: Evoqua Water Technologies LLC, Evoqua Water Technologies Limited
    Inventors: Joshua Griffis, Simon Dukes, Paul Beddoes, Peter G. Rogers
  • Publication number: 20210087086
    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.
    Type: Application
    Filed: April 30, 2020
    Publication date: March 25, 2021
    Applicant: Evoqua Water Technologies LLC
    Inventor: Sergio Andres Pino Jelcic
  • Patent number: 10934193
    Abstract: According to various aspects and embodiments, a system and method for treating groundwater contaminated with an organic contaminant is provided. According to some embodiments, the contaminated groundwater is treated by introducing a persulfate to produce a first treated aqueous solution, exposing the first treated aqueous solution to ultraviolet light to produce a second treated aqueous solution and one or more gases, and removing the one or more gases generated from exposing the first treated aqueous solution to the ultraviolet light.
    Type: Grant
    Filed: May 6, 2016
    Date of Patent: March 2, 2021
    Assignee: Evoqua Water Technologies LLC
    Inventors: Adam Szczesniak, Jonathan H. Wood, Bruce L. Coulter, Christopher Hall
  • Publication number: 20210047218
    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 12, 2019
    Publication date: February 18, 2021
    Applicant: Evoqua Water Technologies LLC
    Inventor: Nathan Antonneau
  • Patent number: 10919792
    Abstract: A system and method is provided for water and wastewater treatment. The system comprises a fixed film biological process and a ballasted flocculation process.
    Type: Grant
    Filed: March 15, 2013
    Date of Patent: February 16, 2021
    Assignee: Evoqua Water Technologies LLC
    Inventors: Nathan Antonneau, Timothy Lindemann, Todd Schwingle, Michael Casey Whittier, Steven E. Woodard