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Class Information
Number: 210/622
Name: Liquid purification or separation > Processes > Treatment by living organism > Aerobic treatment > Recirculating to prior step > Of separated liquid
Description: Process and wherein supernatant or filtrate is recirculated.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7413656 |
Aerobic sewage system |
Aug. 19, 2008 |
| 7402247 |
System for wastewater treatment and digestion having aerobic and anaerobic treatment zones |
Jul. 22, 2008 |
| 7378021 |
Tidal vertical flow wastewater treatment system and method |
May. 27, 2008 |
| 7347940 |
Nitrogen removal system and method for wastewater treatment lagoons |
Mar. 25, 2008 |
| 7318895 |
Biodestruction of blended residual oxidants |
Jan. 15, 2008 |
| 7309435 |
Biological process for waste treatment and energy production |
Dec. 18, 2007 |
| 7214317 |
Tidal vertical flow wastewater treatment system and method |
May. 8, 2007 |
| 7198720 |
Method of sludge recycling |
Apr. 3, 2007 |
| 7169306 |
Versatile pre-thickened aerobic digester system |
Jan. 30, 2007 |
| 7166219 |
Method of purifying fischer-tropsch derived water |
Jan. 23, 2007 |
| 7163631 |
Process for treating wastewater containing peracetic acid |
Jan. 16, 2007 |
| 7156998 |
Phased activated sludge system |
Jan. 2, 2007 |
| 7153431 |
Method and system for utilizing activated sludge in a ballasted flocculation process to remove BOD and suspended solids |
Dec. 26, 2006 |
| 7153393 |
Method of purifying Fischer-Tropsch derived water |
Dec. 26, 2006 |
| 7118674 |
Energy-efficient biological treatment with membrane filtration |
Oct. 10, 2006 |
| 7101482 |
Method and facility for treatment of sludge derive from biological water purification facilities |
Sep. 5, 2006 |
| 7094350 |
Method of sludge recycling |
Aug. 22, 2006 |
| 7087169 |
Combined tidal vertical flow and horizontal flow wastewater treatment system and method |
Aug. 8, 2006 |
| 7060185 |
Sewage treatment apparatus using self-granulated activated sludge and sewage treatment method thereof |
Jun. 13, 2006 |
| 7052607 |
Bioreactor processing method within a tank internally chambered to sequentially perform biological treatment and membrane filtration |
May. 30, 2006 |
| 7037429 |
Water treatment unit |
May. 2, 2006 |
| 7033503 |
Municipal wastewater treatment apparatus and process with a continuous feed and cyclic aeration |
Apr. 25, 2006 |
| 7029586 |
Integrated tidal wastewater treatment system and method |
Apr. 18, 2006 |
| 7022237 |
Aerobic wastewater management system, apparatus, and method |
Apr. 4, 2006 |
| 7022233 |
Biologically active reactor system and method for treating wastewater |
Apr. 4, 2006 |
| 7018536 |
Aerobic wastewater management system, apparatus, and method |
Mar. 28, 2006 |
| 6998048 |
Method and apparatus for cleaning effluent |
Feb. 14, 2006 |
| 6946074 |
Method for biological cleaning of wastewater |
Sep. 20, 2005 |
| 6942801 |
Apparatus and process for aerobic digestion of organic sludge |
Sep. 13, 2005 |
| 6908554 |
Organic waste treatment method |
Jun. 21, 2005 |
| 6896805 |
Tidal vertical flow wastewater treatment system and method |
May. 24, 2005 |
| 6881338 |
Integrated tidal wastewater treatment system and method |
Apr. 19, 2005 |
| 6872313 |
Domestic wastewater treatment system |
Mar. 29, 2005 |
| 6863817 |
Membrane bioreactor, process and aerator |
Mar. 8, 2005 |
| 6863816 |
Tidal vertical flow wastewater treatment system and method |
Mar. 8, 2005 |
| 6858142 |
Polluted water treatment system |
Feb. 22, 2005 |
| 6833074 |
Waste treatment with control over biological solids |
Dec. 21, 2004 |
| 6808631 |
Aerobic wastewater treatment apparatus |
Oct. 26, 2004 |
| 6790347 |
Batch style wastewater treatment apparatus using biological filtering process and wastewater treatment method using the same |
Sep. 14, 2004 |
| 6787035 |
Bioreactor for treating wastewater |
Sep. 7, 2004 |
| 6773594 |
Waste-water purification in cattle-breeding systems |
Aug. 10, 2004 |
| 6755972 |
Biological purification of water to any degree up to and drinking water |
Jun. 29, 2004 |
| 6743361 |
Method for bacterially treating tank toilet systems and apparatus for using same |
Jun. 1, 2004 |
| 6709594 |
Method for treating waste-activated sludge using electroporation |
Mar. 23, 2004 |
| 6676836 |
Surge anoxic mix sequencing batch reactor systems |
Jan. 13, 2004 |
| 6660163 |
Waste treatment with control over biological solids |
Dec. 9, 2003 |
| 6656249 |
Method for desulphurization of gases |
Dec. 2, 2003 |
| 6632365 |
Method for treating an effluent using simultaneous nitrification/denitrification in a biological filter |
Oct. 14, 2003 |
| 6605219 |
Wastewater treatment apparatus and method |
Aug. 12, 2003 |
| 6555002 |
Apparatus and method for wastewater treatment with enhanced solids reduction (ESR) |
Apr. 29, 2003 |
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