Itt Manufacturing Enterprises, Inc.

Xylem Water Solutions U.s.a., Inc.

Xylem IP Holdings, LLC

Joseph G Krall

David Patrick Rice

John Edward Koch, Iii

Michael A Dimitriou

Velupillai Yogendran

Roger J Byrne

Kenneth P George

James A Reilly

Thomas Casper

Mark A Schoenenberger

Brad D Laubenstein

Thomas J Casper

Jesse Jones

Neil Tischler

Scott Hatch

Brad Laubenstein

Mark Schoenenberger

Neil S Tischler

Neil S Tischier

Reilly James A A

Iii John E Koch

A method for cleaning and preventing diffuser membrane fouling of an aeration system can include: transporting a liquid acidic solution into a downcomer pipe or a purge line positioned in a reservoir of an aeration system containing a body of water such that the liquid acidic solution flows into a manifold and air distribution pipes; allowing the liquid acidic solution to vaporize; and blowing the vaporized acidic solution into a plurality of diffusers supported by the air distribution pipes. An aeration system that can implement the method is also included.

Diffused aeration systems and methods for cleaning fouled diffusers in aeration systems

A gas distribution assembly includes an outer pipe and an inner pipe, defining a gas supply chamber therebetween. Furthermore, the gas distribution assembly includes a unit for supplying compressed gas to the gas supply chamber, a first end connection connecting first ends of the outer pipe and of the inner pipe, and leaving an orifice of the first end of the inner pipe open outwards, a second end connection connecting second ends of the outer pipe and of the inner pipe, and leaving an orifice of the second end of the inner pipe open outwards. The inner pipe includes a first pipe member including the first end of the inner pipe and a second pipe member including the second end of the inner pipe, which pipe members are in telescopic engagement with each other.

Gas distribution assembly

Membrane strip diffusers are disclosed, useful for example in aerating wastewater in activated sludge plants. These diffusers have membranes, diffuser bodies comprising gas conduits and, in addition to the conduits, integral membrane supports elongated in the same general direction. Such conduits are for example co-extruded with the diffuser bodies. The supports are apertured to discharge gas into chambers formed beneath the membranes when they inflate, and the membranes have pores to discharge the gas. Ways to edge- and end-seal the membranes to the diffuser bodies and ways to support the diffusers are also disclosed.

Strip diffuser

A membrane filtration system comprising one or more submerged ultrafiltration or microfiltration membrane assemblies at ambient pressure, with mixed liquor is discharged underneath each membrane assembly. In a sequenced batch reactor system, a coarse bubble air diffuser for scouring each membrane assembly is supplied with air only during the backwash cycle of the filtration system and not during the filtration cycle. In a membrane bioreactor system, the biological treatment section is physically separated from the filtration section and fine bubble air diffusion is used in the biological treatment section.

Process and energy-efficient biological treatment system with filtration membrane

Membrane strip diffusers are disclosed, useful for example in aerating wastewater in activated sludge plants. These diffusers have membranes, diffuser bodies and gas conduits elongated in the same general direction. Such conduits may be attached to or formed integrally with the diffuser bodies. Gas chambers form beneath the membranes when they inflate, and these are separate from but communicate with the gas conduits, e.g., through passageways distributed along the lengths of the membrane supports. Preferably, the passageway flow cross-sections are small, thus tending toward uniform distribution of gas along the membrane's length. Ways to edge- and end-seal the membranes to the diffuser bodies are also disclosed.

A membrane filtration system comprising one or more submerged ultrafiltration or microfiltration membrane assemblies at ambient pressure, each membrane assembly positioned 100&#x2013;240 mm from a nearest wall, baffle, or adjacent membrane assembly and no more than 1 meter above a floor and at least 150 mm below the liquid level. Mixed liquor is discharged underneath each membrane assembly to create a vertical flow velocity in a range of 1&#x2013;8 mm/second along an entire length of the membrane assembly. In a sequenced batch reactor system, a coarse bubble air diffuser for scouring each membrane assembly is supplied with air only during the backwash cycle of the filtration system and not during the filtration cycle. In a membrane bioreactor system, the biological treatment section is physically separated from the filtration section and fine bubble air diffusion is used in the biological treatment section.

Energy-efficient biological treatment system with filtration membrane

Energy-efficient biological treatment with membrane filtration

Growing community of inventors

Grafton, WI, United States of America

Joseph G Krall