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Class Information
Number: 210/621
Name: Liquid purification or separation > Processes > Treatment by living organism > Aerobic treatment > Recirculating to prior step
Description: Process wherein a portion of the stream is withdrawn subsequent to the aerobic treatment step and returned thereto.
Sub-classes under this class:
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7618537 |
Membrane biofilm reactor method for reducing the concentration of oxidized contaminants in ground water |
Nov. 17, 2009 |
| 7560027 |
Method for treating wastewater and sludge |
Jul. 14, 2009 |
| 7527736 |
Method for generating fracturing water |
May. 5, 2009 |
| 7513997 |
Recirculating wastewater evapotranspiration and disinfection system |
Apr. 7, 2009 |
| 7510656 |
Waste water treatment method |
Mar. 31, 2009 |
| 7481935 |
Waste water treatment process |
Jan. 27, 2009 |
| 7462285 |
Wastewater purification method and apparatus |
Dec. 9, 2008 |
| 7452469 |
Apparatus having rotary activated Baccillus contractor for purifying sewage and wastewater and method using the same |
Nov. 18, 2008 |
| 7439054 |
Bioreactor system for biological degradation of oily sludge |
Oct. 21, 2008 |
| 7429328 |
Apparatus and methods for control of waste treatment processes |
Sep. 30, 2008 |
| 7326344 |
Process for the removal of metals by biosorption from mining or industrial effluents |
Feb. 5, 2008 |
| 7318895 |
Biodestruction of blended residual oxidants |
Jan. 15, 2008 |
| 7314563 |
Membrane coupled activated sludge method and apparatus operating anoxic/anaerobic process alternately for removal of nitrogen and phosphorous |
Jan. 1, 2008 |
| 7309435 |
Biological process for waste treatment and energy production |
Dec. 18, 2007 |
| 7309433 |
Fluid bed expansion and fluidisation |
Dec. 18, 2007 |
| 7252766 |
Wastewater treatment system and method |
Aug. 7, 2007 |
| 7169306 |
Versatile pre-thickened aerobic digester system |
Jan. 30, 2007 |
| 7163632 |
System and method for oxygenation for wastewater treatment |
Jan. 16, 2007 |
| 7163631 |
Process for treating wastewater containing peracetic acid |
Jan. 16, 2007 |
| 7160458 |
Method for purification of process water from a kerosene desulfurization plant |
Jan. 9, 2007 |
| 7147776 |
Method for treating an effluent in three biological steps |
Dec. 12, 2006 |
| 7147780 |
Process for reducing sludge derived from the treatment of wastewater by oxygenation and mechanical action |
Dec. 12, 2006 |
| 7056438 |
Flood and drain wastewater treatment system and associated methods |
Jun. 6, 2006 |
| 7011757 |
Process for recycling mixed liquor with dual-use jet recirculation pumps to provide highly efficient wastewater treatment |
Mar. 14, 2006 |
| 6984325 |
Water and aqueous mix treatment using venturi discharge oxygen |
Jan. 10, 2006 |
| 6890429 |
Systems and methods for treating waste water |
May. 10, 2005 |
| 6805806 |
Method and apparatus for treatment of wastewater employing membrane bioreactors |
Oct. 19, 2004 |
| 6802975 |
Method for biological effluent treatment |
Oct. 12, 2004 |
| 6787035 |
Bioreactor for treating wastewater |
Sep. 7, 2004 |
| 6780318 |
Method for recovering a disposal trench with a biomat slime, and method for operating a waste treatment vessel |
Aug. 24, 2004 |
| 6752926 |
Method and apparatus for treatment of wastewater |
Jun. 22, 2004 |
| 6692642 |
Organic slurry treatment process |
Feb. 17, 2004 |
| 6461510 |
High-efficiency processes for destruction of contaminants |
Oct. 8, 2002 |
| 6413427 |
Nitrogen reduction wastewater treatment system |
Jul. 2, 2002 |
| 6406629 |
Biological process for removing phosphorous involving a membrane filter |
Jun. 18, 2002 |
| 6372138 |
Wastewater treatment method for removing organic matter and nitrogen, carrier used thereof and method for manufacturing the carrier |
Apr. 16, 2002 |
| 6365048 |
Method for treatment of organic matter contaminated drinking water |
Apr. 2, 2002 |
| 6361695 |
Shipboard wastewater treatment system |
Mar. 26, 2002 |
| 6328892 |
Liquid effluent treatment process and plant |
Dec. 11, 2001 |
| 6312599 |
Method of using wastewater flow equalization basins for multiple biological treatments |
Nov. 6, 2001 |
| 6299775 |
Waste and wastewater treatment and recycling system |
Oct. 9, 2001 |
| 6290857 |
Method for oxygenation of waste water |
Sep. 18, 2001 |
| 6290850 |
Method for controlling aeration systems of biological tanks treating waste water |
Sep. 18, 2001 |
| 6228266 |
Water treatment apparatus using plasma reactor and method thereof |
May. 8, 2001 |
| 6217766 |
Sulphur reducing bacterium and its use in biological desulphurization processes |
Apr. 17, 2001 |
| 6214228 |
Liquid effluent treatment plant and process |
Apr. 10, 2001 |
| 6207054 |
Method of biologically cleaning polluted water |
Mar. 27, 2001 |
| 6168642 |
Industrial utilization of garbage with effective recycling and with optimization in energy production |
Jan. 2, 2001 |
| 6153099 |
Biological waste treatment process and apparatus |
Nov. 28, 2000 |
| 6136194 |
Method and device for treating wastewater |
Oct. 24, 2000 |
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