公开(公告)号：US10683162B2

公开(公告)日：2020-06-16

申请号：US15979660

申请日：2018-05-15

Applicant: Evoqua Water Technologies LLC

Inventor： Matthew P. Bronk ,  Douglas N. Muller ,  Thomas Mangione

IPC: B65D88/40 ,  C02F11/04 ,  C12M1/107 ,  C02F3/28 ,  C12M1/00

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.

公开(公告)号：US10654735B2

公开(公告)日：2020-05-19

申请号：US16309976

申请日：2017-06-06

Applicant: EVOQUA WATER TECHNOLOGIES LLC

Inventor： George W. Smith

IPC: C02F9/00 ,  C02F1/24 ,  C02F3/30 ,  C02F11/04 ,  C02F11/12 ,  C02F3/12 ,  C02F1/52 ,  C02F1/28 ,  C02F11/123 ,  C02F1/00

Abstract: A wastewater treatment system includes a contact tank having a first inlet configured to receive wastewater to be treated, a second inlet configured to receive activated sludge, and an outlet, a dissolved air flotation unit having an inlet in fluid communication with the outlet of the contact tank, a biological treatment unit having a first inlet in fluid communication with an effluent outlet of the dissolved air flotation unit and an outlet, an anaerobic digester having an inlet and an outlet, a floated solids conduit providing fluid communication between the solids outlet of the dissolved air flotation unit and the inlet of the anaerobic digester, and a thickener having an inlet in fluid communication with the outlet of the anaerobic digester, a first outlet in fluid communication with the inlet of the anaerobic digester, and a second outlet.

公开(公告)号：US20190263697A1

公开(公告)日：2019-08-29

申请号：US16287203

申请日：2019-02-27

Applicant: Evoqua Water Technologies LLC

Inventor： Gary C. Ganzi ,  Joahua Griffis ,  Simon Dukes ,  Li-Shiang Liang ,  Darren Adrian Dale ,  Michael Shaw ,  Paul Beddoes ,  George Gu

IPC: C02F9/00

Abstract: A water treatment system for producing potable water and water for irrigation from saline water, the system includes an electrodialysis apparatus including one or more monovalent selective membranes and having an inlet fluidly connectable to a source of water to be treated, a diluate outlet, and a concentrate outlet, a nanofiltration apparatus positioned downstream of the electrodialysis apparatus and having an inlet fluidly connectable to the diluate outlet of the electrodialysis apparatus, a permeate outlet, and a retentate outlet, and an electrolyzer in fluid communication with one of the concentrate outlet and the retentate outlet, and configured to generate a product stream including one or more of chlorine gas, hypochlorite ion, sodium hydroxide, sulfuric acid, hydrochloric acid, or sodium hypochlorite.

公开(公告)号：US20190210891A1

公开(公告)日：2019-07-11

申请号：US16309981

申请日：2017-06-14

Applicant: Evoqua Water Technologies LLC

Inventor： Nathan Antonneau

IPC: C02F1/24 ,  C02F3/00 ,  C02F3/12 ,  C02F3/30

Abstract: A wastewater treatment system includes a first sub-system having a biological treatment unit and a second sub-system having a dissolved air flotation unit. A method of treating wastewater includes directing a first stream of wastewater to a biological treatment unit and directing an overflow stream of wastewater to a dissolved air flotation unit. A method of facilitating treatment of overflow wastewater in a biological treatment system includes connecting an overflow treatment system in a parallel configuration with the biological treatment system, the overflow treatment system having a dissolved air flotation unit, and directing a fraction of activated sludge from the biological treatment system to the overflow treatment system.

公开(公告)号：US20190194049A1

公开(公告)日：2019-06-27

申请号：US16307671

申请日：2017-06-07

Applicant: Evoqua Water Technologies, LLC

Inventor： Timothy Lindemann ,  Michael Casey Whittier

IPC: C02F9/00

Abstract: Disclosed are apparatus and methods for treating wastewater. In one example a system for treating wastewater treatment is provided. The system comprises a biological reactor having an inlet in fluid communication with a source of wastewater and an outlet, the biological reactor configured to treat wastewater from the source of wastewater and output a biologically treated wastewater from the outlet, a solids-liquid separation system having an inlet in fluid communication with the outlet of the biological reactor and configured to separate the biologically treated wastewater into a solids-lean effluent and a solids-rich waste activated sludge (WAS), a treatment subsystem comprising a digester, an inlet in fluid communication with a WAS outlet of the solids-liquid separation system, and an outlet for providing ballasted and digested WAS, and a ballast feed system configured to deliver ballast to one of the biological reactor and the treatment subsystem.

公开(公告)号：US10322953B2

公开(公告)日：2019-06-18

申请号：US15681542

申请日：2017-08-21

Applicant: EVOQUA WATER TECHNOLOGIES LLC

Inventor： Gary C. Ganzi ,  Frederick C. Wilkins

IPC: C02F1/469 ,  C02F9/06 ,  B01D61/44 ,  B01D61/46 ,  C02F1/44 ,  B01D61/48 ,  C02F9/00 ,  C02F103/08

Abstract: Water treatment systems including electrically-driven and pressure-driven separation apparatus configured to produce a first treated water suitable for use as irrigation water and a second treated water suitable for use as potable water from brackish water and methods of operation of same.

公开(公告)号：US10322375B2

公开(公告)日：2019-06-18

申请号：US15744134

申请日：2016-05-16

Applicant: Evoqua Water Technologies LLC

Inventor： Tomasz Swiatek ,  Zhiyi Cao ,  Bruce Gregory Biltoft ,  Lisa Kathleen Leckie ,  Huw Alexander Lazaredes

IPC: B01D65/08 ,  B01D61/20 ,  B01D63/04

Abstract: An aeration device configured to be fitted to a membrane filtration module having membranes mounted therein. The aeration device comprises a sleeve configured to at least partially surround the membrane filtration module. The sleeve has one end adapted to engage with the membrane filtration module and another end adapted to engage with a filtrate collection conduit or manifold.

公开(公告)号：US20190084853A1

公开(公告)日：2019-03-21

申请号：US15760006

申请日：2016-09-01

Applicant: Evoqua Water Technologies, LLC

Inventor： Timothy Lee Lindemann ,  Michael Casey Whittier

IPC: C02F3/00 ,  C02F3/12

Abstract: A sequencing batch reactor includes a liquid level sensor configured to measure a level of liquid in the vessel and provide an indication of the level of the liquid to a controller and a sludge detector configured to measure a position of an interface between sludge and solids-lean supernatant in the vessel and to provide an indication of the position of the interface to the controller. The controller is configured to perform a comparison between the level of the liquid and the position of the interface and control an amount of solids-lean supernatant removed from the vessel during the decant stage based on the comparison.

公开(公告)号：US10207210B2

公开(公告)日：2019-02-19

申请号：US15074031

申请日：2016-03-18

Applicant: EVOQUA WATER TECHNOLOGIES LLC

Inventor： Peter J. Petit ,  William E. Davis

IPC: C02F1/00 ,  B01D29/01 ,  B01D29/07 ,  B01D33/00 ,  B01D33/11 ,  B01D33/21 ,  B01D33/23 ,  B01D33/50

Abstract: A filter device is configured to filter a liquid. The filter device includes a drum sized to receive the liquid and a plurality of filter panels coupled to the drum to define a plurality of discs. The liquid passes through at least a portion of one of the discs. Each filter panel includes a perimeter frame that defines a panel normal flow area and a filter media coupled to the perimeter frame. The filter media may be adapted to include a plurality of pleats.

公开(公告)号：US20180272285A1

公开(公告)日：2018-09-27

申请号：US15901547

申请日：2018-02-21

Applicant: Evoqua Water Technologies LLC

Inventor： Michael Collignon ,  Wahl Khit NG

IPC: B01D65/10 ,  B01D65/00 ,  B01D63/02

CPC classification number: B01D65/10 ,  B01D63/02 ,  B01D65/00 ,  B01D2313/18 ,  B01D2313/21

Abstract: Systems and methods for isolating a filtration module are provided. The systems and methods may utilize a removable end cap comprising an isolation valve. In certain systems and methods, the isolation valve may be configured to selectively allow fluid communication between a port and a filtrate passageway of one filtration module in a plurality of filtration modules.