US Patent No: 7,455,765

Number of patents in Portfolio can not be more than 2000

Wastewater treatment system and method

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ALSO PUBLISHED AS: 20070170112
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Abstract

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The invention is directed to a wastewater treatment system having an anoxic biological treatment zone, an aerobic biological treatment zone and a separator. The concentration of oxygen in streams within the system is strategically managed for improved removal of nutrient from the wastewater. A source of biodegradable carbon may be introduced to reduce the concentration of oxygen within the system. An effective treatment time under anoxic or aerobic conditions may further be varied.

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Patent Owner(s)

Patent OwnerAddressTotal Patents
EVOQUA WATER TECHNOLOGIES LLCALPHARETTA, GA261

International Classification(s)

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  • [Patents Count]

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Elefritz, Robert A Ormond Beach, FL 4 20
Liu, Wenjun King of Prussia, PA 24 122

Cited Art Landscape

Patent Info (Count) # Cites Year
 
EVOQUA WATER TECHNOLOGIES LLC (30)
5,895,570 Modular filtering system 46 1996
6,159,373 Cleaning of hollow fibre membranes 49 1997
6,077,435 Filtration monitoring and control system 80 1998
6,156,200 Gas-scrubbed hollow fiber membrane module 96 1998
6,254,773 Microporous membrane filtration assembly 55 1999
6,555,005 Scouring method 69 1999
6,202,475 Predicting logarithmic reduction values 50 1999
D478913 Manifold header 40 2000
D462699 Manifold header cap 47 2000
6,524,481 Apparatus and method for cleaning membrane filtration modules 64 2001
6,969,465 Scouring method 39 2002
6,783,008 Hollow fibre restraining system 37 2002
6,955,762 Method of cleaning membranes 28 2002
6,641,733 Apparatus and method for cleaning membrane filtration modules 50 2002
6,872,305 Membrane filtration system 36 2003
6,821,420 Apparatus and method for cleaning membrane filtration modules 38 2003
6,884,350 Modified membranes 41 2003
7,083,733 Water treatment system and method 37 2003
7,264,716 Membrane filtration manifold system 29 2003
2007/0007,214 Mixing chamber 32 2003
7,226,541 Membrane polymer compositions 34 2003
7,018,533 High solids module 30 2004
6,841,070 Apparatus and method for cleaning membrane filtration modules 32 2004
6,962,258 Hollow fiber restraining system 27 2004
7,300,022 Modified membranes 36 2004
7,247,238 Poly(ethylene chlorotrifluoroethylene) membranes 33 2004
2007/0075,021 Module cleaning method 28 2004
7,160,463 Methods of minimizing the effect of integrity loss in hollow fibre membrane modules 29 2004
2007/0227,973 Reduction of Backwash liquid Waste 28 2005
2006/0131,234 Scouring method 28 2005
 
ZENON TECHNOLOGY PARTNERSHIP (28)
5,639,373 Vertical skein of hollow fiber membranes and method of maintaining clean fiber surfaces while filtering a substrate to withdraw a permeate 139 1995
5,783,083 Vertical cylindrical skein of hollow fiber membranes and method of maintaining clean fiber surfaces 130 1996
6,120,688 Portable reverse osmosis unit for producing drinking water 44 1998
6,042,677 Potted header for hollow fiber membranes and method for making it 81 1999
RE37549 Vertical skein of hollow fiber membranes and method of maintaining clean fiber surfaces while filtering a substrate to withdraw a permeate 71 1999
6,354,444 Hollow fiber membrane and braided tubular support therefor 72 1999
6,193,890 System for maintaining a clean skein of hollow fibers while filtering suspended solids 92 1999
6,303,035 Immersed membrane filtration process 53 1999
6,375,848 Water filtration using immersed membranes 59 1999
6,245,239 Cyclic aeration system for submerged membrane modules 73 2000
6,325,928 Immersed membrane element and module 68 2000
6,294,039 Potted header for hollow fiber membranes 66 2000
6,893,568 Immersed membrane filtration system and overflow process 45 2000
6,406,629 Biological process for removing phosphorous involving a membrane filter 57 2000
6,550,747 Cyclic aeration system for submerged membrane modules 58 2001
6,656,356 Aerated immersed membrane system 56 2001
6,620,319 Apparatus for withdrawing permeate using an immersed vertical skein of hollow fibre membranes 61 2001
6,899,812 Water filtration using immersed membranes 34 2002
6,708,957 Moving aerator for immersed membranes 40 2002
6,685,832 Method of potting hollow fiber membranes 53 2002
6,863,823 Inverted air box aerator and aeration method for immersed membrane 36 2002
6,682,652 Apparatus for withdrawing permeate using an immersed vertical skein of hollow fiber membranes 46 2002
6,814,861 Ultrafiltration and microfiltration module and system 32 2002
6,706,189 Cyclic aeration system for submerged membrane modules 56 2003
2003/0146,153 Chemical cleaning backwash for normally immersed membranes 29 2003
2004/0007,525 Maintenance cleaning for membranes 29 2003
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7,052,610 Immersed membrane filtration system and overflow process 31 2005
 
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5,403,479 In situ cleaning system for fouled membranes 92 1993
5,501,798 Microfiltration enhanced reverse osmosis for water treatment 66 1994
5,670,053 Purification of gases from water using reverse osmosis 81 1995
5,766,479 Production of high purity water using reverse osmosis 86 1995
5,958,243 Apparatus and method for membrane filtration with enhanced net flux 60 1997
5,910,250 Baffle for conversion of fine bubbles to coarse while filtering with a vertical skein of hollow fibers 98 1997
5,914,039 Filtration membrane with calcined .alpha.-alumina particles therein 70 1997
5,944,997 System for maintaining a clean skein of hollow fibers while filtering suspended solids 111 1998
5,997,745 Method for producing high purity water using triple pass reverse osmosis (TPRO) 53 1998
6,045,698 Method for cleaning a filtration installation of the type with immersed membranes 69 1998
6,024,872 Method of making a dope comprising hydrophilized PVDF and .alpha.-alumina, and a membrane made therefrom 64 1999
6,214,231 System for operation of multiple membrane filtration assemblies 68 1999
6,361,695 Shipboard wastewater treatment system 61 2000
6,485,645 Biological process for removing phosphorus involving a membrane filter 54 2002
6,645,374 Membrane module for gas transfer and membrane supported biofilm process 57 2003
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2005/0115,899 Membrane bioreactor having single header membrane module 32 2004
2005/0194,315 Membrane batch filtration process 29 2005
 
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6,039,872 Hydrophilic membrane 57 1998
6,770,202 Porous membrane 52 2002
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6,884,375 Hydrophobic membrane materials for filter venting applications 43 2004
 
U.S. FILTER WASTEWATER GROUP, INC. (10)
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4,767,539 Cleaning of hollow fiber filters utilized in lumenal gas flow 66 1987
4,876,012 Hollow fibre filter cartridge and header 54 1988
5,024,762 Concentration of solids in a suspension 56 1990
2002/0148,767 Membrane filtration manifold system 46 2001
2003/0178,365 Scouring method 46 2003
2003/0226,797 Fibre membrane arrangement 43 2003
2004/0084,369 Scouring method 37 2003
2004/0178,154 Scouring method 29 2004
7,223,340 Hollow fibre restraining system 29 2005
 
SIEMENS WATER TECHNOLOGIES CORP. (7)
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5,094,750 Hollow fibre filter cartridge and header 49 1989
5,194,149 Filter cartridge manifold 53 1991
5,192,442 Multiple zone batch treatment process 67 1991
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2004/0217,053 Method of cleaning membrane modules 39 2004
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The Dow Chemical Company (7)
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5,221,478 Chromatographic separation using ion-exchange resins 49 1992
 
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6,277,512 Polymer electrolyte membranes from mixed dispersions 80 1999
6,423,784 Acid functional fluoropolymer membranes and method of manufacture 56 1999
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6,861,466 Fluoropolymer dispersion containing no or little low molecular weight fluorinated surfactant 75 2004
7,041,728 Aqueous dispersions of polytetrafluoroethylene having a low amount of fluorinated surfactant 58 2004
 
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Memtec Limited (5)
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4,793,932 Variable volume filter or concentrator 62 1986
4,935,143 Cleaning of filters 61 1988
4,921,610 Cleaning of hollow fibre filters 85 1988
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SIEMENS INDUSTRY, INC. (4)
5,401,405 Combined air/water backwash in a travelling bridge filter 44 1993
5,643,455 Concentration of solids in a suspension using hollow fibre membranes 99 1995
2006/0261,007 Methods of cleaning membrane modules 29 2004
2006/0000,775 Scouring method 29 2005
 
ASAHI KASEI KABUSHIKI KAISHA (3)
6,299,773 Porous polyvinylidene fluoride resin film and process for producing the same 48 1999
6,322,703 Method for purifying aqueous suspension 40 2000
7,160,455 Hollow fiber membrane module 37 2002
 
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6,495,041 Method for purifying aqueous suspension 40 2001
 
Baxter Travenol Laboratories, Inc. (3)
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EBARA CORPORATION (3)
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4,876,006 Hollow fiber filter device 110 1988
5,744,037 Method of treating foul water 40 1996
 
Japan Organo Co., Ltd. (3)
4,886,601 Column filter using bundles of long fibers 57 1989
5,209,852 Process for scrubbing porous hollow fiber membranes in hollow fiber membrane module 88 1991
5,151,191 Filtration process using hollow fiber membrane module 70 1991
 
KUBOTA CORPORATION (3)
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5,451,317 Solid-liquid separator 57 1994
5,647,988 Method of back-washing submerged-type ceramic membrane separation apparatus 71 1994
 
MEDIVATORS INC. (3)
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MILLIPORE CORPORATION (3)
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5,211,823 Process for purifying resins utilizing bipolar interface 82 1991
5,158,721 Porous membrane formed from interpenetrating polymer network having hydrophilic surface 60 1991
 
MITSUBISHI RAYON CO., LTD. (3)
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5,677,360 Hydrophilic polymer alloy, fiber and porous membrane comprising this polymer alloy, and methods for preparing them 39 1995
6,280,626 Membrane separator assembly and method of cleaning the assembly utilizing gas diffuser underneath the assembly 68 1999
 
Mobil Oil Corporation (3)
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TEIJIN LIMITED (3)
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4,353,802 Semipermeable composite membrane 56 1979
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Akzona Incorporated (2)
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BASF AKTIENGESELLSCHAFT (2)
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6,264,839 Phosphonomethylated polyvinylamines and preparation and use thereof 41 1993
 
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5,490,939 Process for reconcentrating overspray from one-component coating compositions 42 1995
 
CELGARD LLC (2)
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CORNING INCORPORATED (2)
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PBI-DANSENSOR A/S (1)
5,138,870 Apparatus for measuring water vapor permeability through sheet materials 57 1991
 
PPG INDUSTRIES, INC. (1)
4,610,789 Filtration cartridge and reactor 36 1985
 
Rhone-Poulenc Recherches (1)
4,810,384 Hydrophilic PVDF semipermeable membrane 71 1987
 
ROCHEM ULTRAFILTRATIONS SYSTEME GESELLSCHAFT FUR ABWASSERREINIGUNG MBH (1)
6,126,819 Apparatus for the treatment of liquids contaminated by foreign substances 40 1998
 
ROTEM INDUSTRIES LTD. (1)
5,575,963 Selective clogging of failed fibers 31 1994
 
Sartorius GmbH (1)
4,969,997 Fluid-impermeable areas on porous membrane filters and their application 37 1989
 
SCIMAT LIMITED (1)
5,198,162 Microporous films 50 1989
 
SECURTIY STATE BANK OF PINE ISLAND (1)
5,361,625 Method and device for the measurement of barrier properties of films against gases 62 1993
 
SEVERN TRENT SERVICES-WATER PURIFICATION SOLUTIONS, INC. (1)
7,022,233 Biologically active reactor system and method for treating wastewater 26 2004
 
SIEMENS WATER TECHNOLOGIES HOLDING CORP. (1)
5,104,546 Pyrogens separations by ceramic ultrafiltration 70 1990
 
SMARTFLOW TECHNOLOGIES, INC. (1)
6,017,451 Spider fitting for multi-module filter system, and motive cart assembly comprising same 31 1997
 
SNECMA (1)
5,477,731 Method and apparatus for detecting a fouled fluid filter 62 1994
 
STANADYNE CORPORATION (1)
6,048,455 Filter assembly with conformal cartridge support structure 48 1997
 
Standard Oil Company (Indiana) (1)
4,188,817 Method for detecting membrane leakage 56 1978
 
Stay Fresh, Inc. (1)
4,476,112 Food preservative composition 62 1983
 
STORK FRIESLAND B.V. (1)
6,576,136 Method and apparatus for removing floating substances and salts from a liquid by means of a membrane filtration 28 2001
 
STUDIECENTRUM VOOR KERNENERGIE, SCK (1)
4,253,936 Method of preparing a membrane consisting of polyantimonic acid powder and an organic binder 39 1980
 
Syrinx Research Pty. Ltd. (1)
4,749,487 High flux membrane 38 1985
 
TECHNOLOGIES AVANCEES & MEMBRANES INDUSTRIELLES (1)
6,780,466 Cross-flow filter membrane and method of manufacturing it 31 2002
 
TERUMO CARDIOVASCULAR SYSTEMS CORPORATION (1)
6,113,782 Potting of tubular bundles in housing 55 1998
 
TERUMO KABUSHIKI KAISHA (1)
5,552,047 Hollow filament blood processing apparatus 36 1995
 
The B. F. Goodrich Company (1)
4,496,470 Cleaning composition 49 1982
 
THERMA-WAVE, INC. (1)
6,952,258 Wafer chuck with integrated reference sample 29 2004
 
TOSHIBA AMERICA RESEARCH, INC. (1)
2002/0191,558 Distributed soft handoff among IP-based base stations 2 2001
 
TOYO BOSEKI KABUSHIKI KAISHA (1)
4,451,369 Fluid separation apparatus 102 1981
 
TOYOTA JIDOSHA KABUSHIKI KAISHA (1)
6,524,733 Fuel cell system with humidity determination 50 2000
 
U.S. FILTER/IONPURE, INC. (1)
4,687,561 Process and apparatus for treatment of fluids, particularly demineralization of aqueous solutions 99 1985
 
Union Camp Corporation (1)
5,888,401 Method and apparatus for reducing membrane fouling 49 1996
 
UNITED PET GROUP, INC. (1)
5,401,401 Hang on tank canister filter 69 1993
 
UNITED STATES FILTER CORPORATION (1)
4,636,296 Process and apparatus for treatment of fluids, particularly desalinization of aqueous solutions 97 1985
 
UNIVERSITY OF ARIZONA (1)
5,531,900 Modification of polyvinylidene fluoride membrane and method of filtering 63 1994
 
VEOLIA WATER SOLUTIONS & TECHNOLOGIES SUPPORT (1)
7,172,701 Water treatment method using an inorganic powder reagent with high specific surface area including a step of recycling said reagent 39 2003
 
Voith Sulzer Paper Technology North America, Inc. (1)
5,968,357 Screen basket having a removable and replaceable cylindrical mesh liner 36 1998
 
VOST ENVIRONMENTAL TECHNOLOGIES, INC. (1)
7,018,530 Apparatus for biological treatment of waste waters 32 2004
 
W. L. GORE & ASSOCIATES, INC. (1)
5,843,069 Implantable containment apparatus for a therapeutical device and method for loading and reloading the device therein 132 1997
 
WATER PURE INC. (1)
4,784,771 Method and apparatus for purifying fluids 74 1987
 
WATER RECOVERY, INC. (1)
5,364,529 Wastewater treatment system 51 1992
 
X-FLOW B.V. (1)
5,076,925 Process for preparing a microporous membrane and such a membrane 76 1990
 
YAMAHA HATSUDOKI KABUSHIKI KAISHA (1)
4,763,612 Intake system for internal combustion engine 56 1987
 
ZAO STC "VALDIPOR" (1)
5,988,400 Pourous fluorocarbon membrane, method for producing thereof and cartridge filter based on said membrane 47 1997
 
ZENON TECHNOLOGY PARTNESHIP (1)
6,863,817 Membrane bioreactor, process and aerator 43 2002
 
Other [Check patent profile for assignment information] (24)
4,230,583 Supported anisotropic reverse osmosis membranes based on synthetic polyamides and processes for their preparation 49 1978
4,204,961 Filter apparatus with cleaning function 47 1979
4,350,592 Cartridge filter 45 1980
4,642,182 Multiple-disc type filter with extensible support 69 1985
4,999,038 Filter unit 89 1989
H1045 Air bubble leak detection test device 43 1990
5,364,527 Apparatus and process for treating water 48 1992
5,316,671 Submersible aeration train and aeration apparatus for biological purification of sewage 46 1993
5,374,353 Aeration train and aeration apparatus for biological purification of wastewater 34 1993
5,584,786 Abdominal exercise device 47 1994
5,597,732 Composting apparatus 42 1995
6,048,454 Oil filter pack and assembly 70 1997
5,942,113 Solid-liquid separating filter medium for sewage, waste water, etc 50 1997
5,989,428 Controlling wastewater treatment by monitoring oxygen utilization rates 47 1997
6,303,026 Wastewater treatment tank with influent gates and pre-react zone with an outwardly flared lower portion 28 1999
6,444,124 System and method for improved treatment of wastewater 43 2000
6,423,214 Device for decanting supernatant 29 2001
6,562,237 Biological nutrient removal using the olaopa process 26 2002
6,758,972 Method and system for sustainable treatment of municipal and industrial waste water 35 2002
2004/0145,076 Scouring method 37 2004
2004/0168,979 Scouring method 29 2004
2004/0232,076 Scouring method 34 2004
2005/0032,982 Modified membranes 34 2004
2006/0273,038 Chemical cleaning for membranes 29 2006

Patent Citation Ranking

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Patent Info (Count) # Cites Year
 
EVOQUA WATER TECHNOLOGIES LLC (19)
7,938,966 Backwash method 16 2003
8,268,176 Backwash 0 2004
8,506,806 Methods and apparatus for removing solids from a membrane module 0 2005
8,377,305 Continuously variable aeration 0 2005
8,496,828 Cleaning in membrane filtration systems 0 2005
8,048,306 Scouring method 2 2005
8,293,098 Infiltration/inflow control for membrane bioreactor 0 2007
8,182,687 Methods of minimising the effect of integrity loss in hollow fibre membrane modules 0 2008
8,318,028 Infiltration/inflow control for membrane bioreactor 0 2008
7,722,769 Method for treating wastewater 18 2008
8,622,222 Membrane cleaning with pulsed airlift pump 0 2008
7,718,057 Wastewater treatment system 17 2008
8,512,568 Method of cleaning membrane modules 0 2009
8,382,981 Frame system for membrane filtration modules 0 2009
8,652,331 Membrane system backwash energy efficiency 0 2009
8,287,743 Membrane cleaning with pulsed airlift pump 1 2010
8,518,256 Membrane module 0 2011
8,372,276 Membrane cleaning with pulsed airlift pump 0 2011
8,623,202 Infiltration/inflow control for membrane bioreactor 0 2012

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