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US Patent 9670083 Method and apparatus for wastewater treatment using external selection

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Patent abstractTimelineTable: Further ResourcesReferences
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Patent
Patent

Patent attributes

Patent Jurisdiction
United States Patent and Trademark Office
United States Patent and Trademark Office
Patent Number
9670083
Patent Inventor Names
Sudhir Murthy5
Charles Bott5
Haydee De Clippeleir5
Bernhard Wett5
Date of Patent
June 6, 2017
Patent Application Number
14788039
Date Filed
June 30, 2015
Patent Citations Received
‌
US Patent 12077460 Apparatus and method for biofilm management
1
‌
US Patent 11685675 Reduction of substances in contaminated fluids using a naturally occurring biological growth media
2
‌
US Patent 11851355 Methods and systems for digesting biosolids and recovering phosphorus
3
‌
US Patent 11999641 Method and apparatus for multi-deselection in wastewater treatment
4
Patent Primary Examiner
‌
Fred Prince, Jr.
Patent abstract

A method and an apparatus for biological wastewater treatment that includes a biological selector and a physical selector. The apparatus comprises an internal biological reactor where wastewater and recycled biomass are combined to provide a high substrate and high electron acceptor gradient for generating morphological biomass features that favor granule formation over floc and filament formation, and an external gravimetric or external screen selector operating on the biomass waste stream for collecting and retaining densified biomass aggregates including dense granule selection and for wasting lighter filaments and flocs. In the method and apparatus, particles may be added to provide cores to promote the formation of aggregates encapsulating the seeded particles. The particles may be added as various materials, for example, in the bioreactor, to initiate or seed the formation of a granule, that could then be separated by or integrated with either the external gravimetric or external screen selector. Further, organisms may be selected for biological phosphorus removal, denitrifying methane oxidizers, biological sulfur or sulfide oxidation, methanogenesis.

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