公开(公告)号：US11192803B2

公开(公告)日：2021-12-07

申请号：US16231861

申请日：2018-12-24

Applicant: Evoqua Water Technologies LLC

Inventor： Gerard Willem Smiddy ,  Frank Leslie Smiddy

IPC: C02F9/02 ,  C02F1/28 ,  C02F9/00 ,  C02F1/00 ,  C02F1/38 ,  C02F1/52 ,  C02F1/74 ,  C02F101/20 ,  C02F101/32

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.

公开(公告)号：US20210346824A1

公开(公告)日：2021-11-11

申请号：US17230976

申请日：2021-04-14

Applicant: Evoqua Water Technologies LLC

Inventor： Sean J. Curley

IPC: B01D24/16 ,  B01D24/46 ,  B01D29/15 ,  B01D29/52 ,  B01D29/66 ,  C02F1/00

Abstract: A regenerative media filter vessel is provided. The regenerative media filter vessel includes a first inlet, a first outlet, and a tube sheet comprising a plurality of tube elements. A portion of the tube element is disposed within a frame positioned about a periphery of tube element and configured to prevent contact between adjacent tube elements. Also disclosed is a method of facilitating water filtration using a regenerative media filter vessel. The method includes providing a regenerative media filter vessel of this disclosure. The method further includes providing the particulate media.

公开(公告)号：US20210340340A1

公开(公告)日：2021-11-04

申请号：US17109497

申请日：2020-12-02

Applicant: Evoqua Water Technologies LLC

Inventor： Marty Wilkes

IPC: C08J3/28 ,  B01J47/04 ,  B01J47/06 ,  B01J41/05 ,  B01J39/05 ,  B01J47/016 ,  B01J39/18 ,  B01J41/12 ,  C02F1/42

Abstract: A method of producing treated ion exchange resin material includes exposing an enclosed vessel containing ion exchange resin and a pre-treatment solution to high energy radiation. The treated ion exchange resin material has reduced organic impurities or total organic carbon (TOC).

公开(公告)号：US11161762B2

公开(公告)日：2021-11-02

申请号：US16354405

申请日：2019-03-15

Applicant: Evoqua Water Technologies LLC

Inventor： Jonathan H Wood ,  Sevang Doung

IPC: C02F9/00 ,  C02F1/00 ,  C02F1/32 ,  C02F1/72 ,  C02F1/76 ,  C02F1/44 ,  C02F1/42 ,  C02F101/34 ,  C02F101/36 ,  C02F101/38 ,  C02F101/30 ,  C02F103/06 ,  C02F101/20

Abstract: Methods of treating contaminated groundwater having recalcitrant organic contaminants are disclosed. The methods include pretreating the contaminated groundwater to remove iron, introducing a persulfate to the contaminated groundwater, and exposing the contaminated groundwater to irradiation. The methods may also include extracting the contaminated groundwater from a feed stream. The methods may also include preparing the persulfate with high purity water. Systems for treating contaminated groundwater having recalcitrant organic contaminants are also disclosed. The systems include a pretreatment subsystem, a source of persulfate, and an irradiation source.

公开(公告)号：US11104411B2

公开(公告)日：2021-08-31

申请号：US16335431

申请日：2017-09-25

Applicant: EVOQUA WATER TECHNOLOGIES LLC

Inventor： Vadim Zolotarsky

IPC: B63J4/00 ,  C02F1/00 ,  C02F1/467 ,  C02F1/68 ,  B63B13/00 ,  C02F103/00

Abstract: Techniques and systems for neutralizing discharge waters from ballast and/or cooling water biocidal treatment and disinfection systems are provided. The systems utilize oxidation reduction potential control to regulate the dechlorination of a biocidal agent to allowable discharge levels in ship buoyancy systems and ship cooling water systems.

公开(公告)号：US20210245149A1

公开(公告)日：2021-08-12

申请号：US17241240

申请日：2021-04-27

Applicant: Evoqua Water Technologies LLC

Inventor： James Buckner ,  Gregory Bachman

IPC: B01J49/60 ,  B01J39/18 ,  C02F1/42 ,  B01J39/04 ,  B01J47/022 ,  B01J47/016 ,  B01J47/04 ,  B01J47/14

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.

公开(公告)号：US20210230033A1

公开(公告)日：2021-07-29

申请号：US17173515

申请日：2021-02-11

Applicant: Evoqua Water Technologies LLC

Inventor： Nathan Antonneau ,  Timothy Lindemann ,  Todd Schwingle ,  Michael Casey Whittier ,  Steven E. Woodard ,  Robert Backman ,  Andrew G. Bishop

IPC: C02F3/04 ,  C02F11/02 ,  C02F3/10 ,  C02F1/52 ,  C02F3/08 ,  C02F9/00 ,  B01D21/01

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.

公开(公告)号：US20210162347A1

公开(公告)日：2021-06-03

申请号：US17263006

申请日：2019-07-25

Applicant: EVOQUA WATER TECHNOLOGIES LLC

Inventor： Scott Waugh ,  Li-Shiang Liang ,  Frederick C. Wilkins ,  Charles P. Buzzel

IPC: B01D61/52 ,  B01D61/46 ,  B01D61/54 ,  B01D65/02 ,  C02F1/469 ,  C02F1/00

Abstract: Methods of operating an electrochemical separation device is disclosed. The methods include operating the electrochemical separation device in an active mode until the resistance reaches a predetermined threshold, regenerating the electrochemical separation device in a passive mode until the resistance reaches a predetermined threshold, and resuming operation of the electrochemical separation device in the active mode. The methods also include operating the electrochemical separation device in an active mode for a predetermined period of time, regenerating the electrochemical separation device in a passive mode for a predetermined period of time, and resuming operation of the electrochemical separation device in the active mode. Water treatment systems include the electrochemical separation device and a control module are also disclosed. Methods of facilitating operation of the electrochemical separation device by providing a control sequence are also disclosed.

公开(公告)号：US20210139351A1

公开(公告)日：2021-05-13

申请号：US16491753

申请日：2018-03-06

Applicant: Evoqua Water Technologies LLC

Inventor： George Gu ,  Simon Paul Dukes ,  Joshua Griffis ,  Michael Shaw

IPC: C02F1/467 ,  C02F1/461 ,  C25B1/30 ,  C25B9/17 ,  C25B15/031 ,  C25B15/029

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.

公开(公告)号：US20210130966A1

公开(公告)日：2021-05-06

申请号：US16491728

申请日：2018-03-06

Applicant: Evoqua Water Technologies LLC

Inventor： Joshua Griffis ,  George Gu ,  Simon P. Dukes

IPC: C25B9/23 ,  C25B1/26 ,  C25B15/02 ,  C02F1/467

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.