Evoqua Water Technologies Pte. Ltd.

Siemens Industry, Inc.

United States Filter Corporation

Siemens Water Technologies Pte. Ltd.

George W Smith

Wenjun Liu

Edward John Jordan

Joseph Edward Zuback

Michael L Doyle

Charles Stark Applegate

Dennis J Barnes

Marc E Roehl

Christopher K Waul

Mark F Pamperin

Colin M McKean

Mark Franklin Pamperin

Christopher S Waul

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.

Method of combining recuperative digestion with a contact tank and dissolved air flotation

Aeration discs used in water treatment and methods of using same are disclosed. According to one or more embodiments, an aeration disc may comprise projections and depressions located on at least one of its surfaces. The aeration discs may be incorporated into aeration devices and water treatment systems.

Aeration discs and methods for using same

A hybrid method and system of treating wastewater with reduced energy usage is disclosed. The treatment system has a sorption system, an anaerobic digester that digests or converts at least a portion of the solids or sludge from the sorption system, and an aerobic treatment tank that partially reduces oxygen demand of a portion of the sludge from the sorption tank.

Hybrid aerobic and anaerobic wastewater and sludge treatment systems and methods

A hybrid method and system of treating wastewater with reduced energy usage is disclosed. The treatment system has a sorption system and an anaerobic digester that digests or converts at least a portion of the solids or sludge from the sorption system.

Systems and methods for treating wastewater including a dissolved air flotation operation performed upon a portion of a mixed liquor output from a contact tank prior to the mixed liquor entering a biological treatment tank.

Contact-stabilization/prime-float hybrid

A wastewater treatment system comprising: a first treatment zone () fluidly connected to one or more further treatment zones (-), a membrane module () comprising a filter membrane is positioned in or fluidly connected to the further treatment zone; and a gravity settling device () fluidly connected to the first treatment zone () to receive overflow therefrom. A method of treating wastewater comprising flowing wastewater through one or more treatment zones (-) to produce a fluid product which is passed through a filter membrane () to produce a concentrated mixed liquor and a filtrate; returning at least a portion of the concentrated mixed liquor to at least one of the treatment zones (); when the flow of wastewater water exceeds a predetermined level, flowing a portion of the returned mixed liquor to a gravity settling device () and clarifying the mixed liquor within the gravity settling device ().

Infiltration/inflow control for membrane bioreactor

A process for treating BOD, nitrogen and phosphorus containing wastewater. The process includes introducing wastewater influent into an anaerobic zone having activated sludge and mixing the wastewater influent with the activated sludge in the anaerobic zone to form a mixed liquor. The mixed liquor is introduced into an oxygen-deficit aeration zone, and denitrified mixed liquor from the oxygen-deficit aeration zone is recycled to the anaerobic zone for mixing therein with wastewater. The process also includes transferring the mixed liquor from the oxygen-deficit aeration zone to an oxygen-surplus aeration zone, transferring a portion of the mixed liquor from the oxygen-surplus aeration zone to a settling zone wherein a supernatant is separated from settled sludge and recycling at least a portion of the settled sludge to the oxygen-deficit aeration zone as recycled activated sludge.

Growing community of inventors

Pewaukee, WI, United States of America

George W Smith