| Patents for C02F 3 - Biological treatment of water, waste water, or sewage (46,453) |
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| 07/24/1997 | DE19641247A1 Use of humic acid and its salts as catalyst or sorbent |
| 07/24/1997 | DE19604012A1 Treatment and valorisation of used natural thermal and mineral waters and sols e.g. after use in remedial baths |
| 07/24/1997 | DE19601714A1 High capacity biological purification of liquid, especially water or sewage |
| 07/24/1997 | DE19536930C1 Bio:filtration drum of perforated polyethylene discs with captive spheres and underwater aeration drive |
| 07/23/1997 | EP0785172A2 Horizontal axis aerator for surface aeration of water and waste water |
| 07/23/1997 | EP0785171A1 Biomass carrier for waste water purification processes |
| 07/23/1997 | EP0784598A1 Treatment of nutrient-rich water |
| 07/23/1997 | EP0784597A2 Process and arrangement for biodegrading pollutants in water |
| 07/23/1997 | EP0784518A2 Microbiological parts washer |
| 07/23/1997 | EP0715608B1 Method of incinerating sludge resulting from waste-water treatment |
| 07/23/1997 | EP0516744B1 Method and apparatus for recirculation of liquids |
| 07/23/1997 | CN2258164Y High-efficiency treatment device of industrial waste water and sanitary sewage |
| 07/23/1997 | CN2258163Y Cross-flow biological treatment device of sewage |
| 07/23/1997 | CN1154949A Method for treating waste water |
| 07/22/1997 | US5650070 Waste treatment, thermophilic bacteria, mixing air stream and waste steam, biooxidation |
| 07/22/1997 | US5650069 Activated sludge |
| 07/17/1997 | WO1997025280A1 Biological denitrification of water |
| 07/17/1997 | DE19600759A1 Modular device for modification of existing waste water treatment plants |
| 07/17/1997 | CA2242706A1 Biological denitrification of water |
| 07/16/1997 | EP0730562B1 Water filtration |
| 07/16/1997 | EP0722555A4 Diffuser conduit joint |
| 07/16/1997 | EP0706500A4 Method for increasing the capacity of sewage treatment plant |
| 07/16/1997 | EP0526590B1 Process and apparatus for biological treatment of effluent |
| 07/16/1997 | CN1154343A Biochemical method for fixation of manganese and then removing manganese |
| 07/15/1997 | US5648264 Clostridium |
| 07/15/1997 | US5648084 Multiple dosage medicine drop bottle |
| 07/15/1997 | US5647986 Apparatus and process for distributed treatment of wastewater |
| 07/15/1997 | US5647983 Aquarium system |
| 07/10/1997 | WO1997024292A1 Method and system for the treatment of livestock wastewater |
| 07/10/1997 | WO1997024291A1 Air charger |
| 07/10/1997 | DE19600356A1 Waste water treatment process and assembly incorporates spiral ultra-violet emitter |
| 07/10/1997 | DE19546674C1 Effluent water gas aeration pipe end-fitting incorporates circumferential groove |
| 07/09/1997 | CN2257551Y Oxygenation, mixing device |
| 07/09/1997 | CN1154096A Controlled denitrification process and system |
| 07/09/1997 | CN1153745A Biological purifying treatment method for sewage |
| 07/08/1997 | US5646270 Culturing aureobasidium; waste treatment |
| 07/08/1997 | US5645797 Method and apparatus for gas/liquid contact |
| 07/08/1997 | US5645732 Septic system filter assembly, filter arrangement and method of using |
| 07/08/1997 | US5645726 Treatment of waste liquor in a vertical shaft bioreactor |
| 07/08/1997 | US5645725 Process and device for the biological treatment of organically polluted waste water and organic waste |
| 07/08/1997 | US5645703 Treatment of process streams from production of acrylonitrile, caprolactam, methacrylates, polycarbonates, salicylic acid |
| 07/03/1997 | WO1997023417A1 Lipid material biodecomposition device and method |
| 07/03/1997 | WO1997023416A1 Fungal degradation of high molecular weight hydrocarbons |
| 07/02/1997 | EP0695345B1 MICROORGANISM OF GENUS $i(BACILLUS CEREUS) AND USE THEREOF |
| 07/02/1997 | CN1153145A Shaft water-collecting return type oxidation pond-land percolation field sewage disposal system |
| 07/01/1997 | US5643503 Immersed turbine for dissolving gas in liquid |
| 07/01/1997 | US5643454 Sewage respiration inhibition |
| 07/01/1997 | US5643453 Injection of inert material for flocculation |
| 06/26/1997 | WO1997022562A1 An aeration device |
| 06/26/1997 | WO1997022561A2 Single-tank sewage treatment plant |
| 06/26/1997 | WO1997022560A1 Fat and oil removal installation |
| 06/26/1997 | WO1997022559A1 Method for biological purification of water |
| 06/26/1997 | DE19604082C1 Elimination of toxic organic matter from liquids |
| 06/26/1997 | DE19547364A1 Treatment of waste water to remove nitrogen and phosphorus compounds |
| 06/25/1997 | CN1152553A Elastic corrugation stereo filler |
| 06/24/1997 | CA2084714C Bioleaching method for the extraction of metals from coal fly ash using thiobacillus |
| 06/19/1997 | DE19621447A1 Single tank sewage treatment tank for waste water from range of sources |
| 06/18/1997 | EP0639163B1 Turbo oxidation system (tos) for "wet combustion" of cod-containing liquids and for cod-reduction by enzymes |
| 06/18/1997 | CN1151973A Deep treating and reusing technology of waste water in wire producing process |
| 06/18/1997 | CN1035194C Method for preparation of polyvinyl alcohol microbe or enzyme immobilization carrier |
| 06/17/1997 | US5639371 Passing wastewater to first and second aeration cells containing active sludge, then to clarifier, discharging supernatant, detecting change in flow rate, isolating first aeration cell to retain active sludge during surges |
| 06/12/1997 | WO1997020778A1 Method for treating effluents by anaerobic fermentation to remove sulphates therefrom |
| 06/12/1997 | DE19545687A1 Bio-processing unit cleans and recycles industrial- or service water for e.g. a car wash plant |
| 06/11/1997 | EP0777632A1 Combined screw for water processing apparatuses |
| 06/11/1997 | EP0777520A1 Zero waste effluent water desalination system |
| 06/11/1997 | CN2255978Y Waste water treating and purifying tank for restaurant |
| 06/11/1997 | CN1151379A Dynamic biological ball filling |
| 06/10/1997 | US5637498 Method for biological cleaning of a contaminated gas flow |
| 06/10/1997 | US5637221 Removing contaminants by combination of settling, flotation, flocculation, biological conversion to produce treated wastewater which can be recycled or safely disposed of in municipal sewer |
| 06/10/1997 | US5637220 Oxidizing sulfides to sulfur using sulfide-oxidizing bacteria |
| 06/10/1997 | US5637219 Means for continuous digestion of organic matter |
| 06/10/1997 | US5637218 Buffer reservoir and pump |
| 06/10/1997 | US5637210 System for treating aqueous solutions containing industrial wastes |
| 06/05/1997 | DE19544455A1 Biological treatment of waste water |
| 06/04/1997 | EP0776864A1 Process for the aerobic biological purification of water |
| 06/04/1997 | EP0776863A1 Activated sludge treatment process and apparatus |
| 06/04/1997 | CN1035052C Micro porous aeration head and its making method |
| 06/03/1997 | US5635393 Method for dechlorinating polychlorinated biphenyls and granules for use in method |
| 06/03/1997 | US5635392 Nutrient mixtures for the bioremediation of polluted soils and waters |
| 05/29/1997 | WO1997019176A1 Malathion carboxylesterase |
| 05/29/1997 | WO1997019026A1 Self-regulated biological scrubber for the treatment of fluids streams |
| 05/28/1997 | EP0775514A1 Method for treating exhaust gases and foul water |
| 05/28/1997 | EP0775093A1 Method and apparatus for the biochemical purification of a liquid medium |
| 05/28/1997 | DE19543694A1 Microbiological treatment of effluent waters |
| 05/28/1997 | CN1150792A Anaerobic removal of sulphur compounds from waste water |
| 05/27/1997 | US5633163 Applying wastewater and solid organic waste to upper layer of filter bed to confine wastewater, maintaining in an aerobic condition, removing wastewater from bottom of filter bed, removing solid waste in decomposed state |
| 05/27/1997 | US5632896 Diffusion, aeration, filtration |
| 05/27/1997 | US5632887 Fluidized bed aquarium filter |
| 05/27/1997 | US5632886 Providing suitable aerobic environment for remediating cultured aerobic bacteria which break down hazardous organic waste products of anaerobic bacteria |
| 05/21/1997 | EP0773908A1 Method and device for purifying waste water, in particular for fully biological domestic sewage treatment systems |
| 05/21/1997 | CN1150415A Rotating contactor including cross flow media for biological treatment of waste water |
| 05/21/1997 | CN1150128A Paper-mill waste water treatment technique |
| 05/21/1997 | CN1150127A Process for aerobic biological purification of water |
| 05/20/1997 | US5630942 Methane production |
| 05/20/1997 | US5630936 Vertical drainage drying bed for waste sludge and an intensified method of treating wastewater |
| 05/15/1997 | WO1997017301A1 Process for the degradation of chlorite |
| 05/15/1997 | WO1997011033A3 Small plant for the treatment of waste water, especially domestic waste water |
| 05/15/1997 | DE19542146A1 Waste water process and assembly for activated sludge |
| 05/15/1997 | DE19542009A1 Biological washing unit for air from stables |
| 05/15/1997 | DE19541940A1 Water treatment aeration and settlement basins |