| Patents for C02F 3 - Biological treatment of water, waste water, or sewage (46,453) |
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| 04/06/1993 | US5200081 Secondary sewage treatment system |
| 04/06/1993 | US5200080 Waste treatment oxidation operations |
| 04/06/1993 | US5200065 Tertiary waste treatment and disposal system |
| 04/01/1993 | WO1993006234A1 Method of cleaning soil polluted with oil and petroleum products |
| 04/01/1993 | WO1993006051A1 Improved nutrient mixtures for use in the bioremediation of polluted soil or water |
| 04/01/1993 | WO1993006050A1 Waste-water treatment system |
| 04/01/1993 | WO1993006049A1 Biological wastewater treatment process |
| 04/01/1993 | WO1993006045A1 Treatment of aqueous media containing organic material |
| 04/01/1993 | WO1993005876A1 Support for liner elements consisting of the assembly of a plurality of strands, threads or filaments, and plant for treating fluid made from such supports |
| 04/01/1993 | CA2119891A1 Biological wastewater treatment process |
| 04/01/1993 | CA2119383A1 Treatment of aqueous media containing organic material |
| 04/01/1993 | CA2119266A1 Waste-water treatment system |
| 03/31/1993 | EP0534351A2 Process and plant for the treatment of highly concentrated ammoniacal waste water |
| 03/31/1993 | EP0533754A1 Filtration apparatus and method |
| 03/30/1993 | US5198114 Dolomitic activated carbon filter |
| 03/30/1993 | US5198113 A filter in a casing above the depth of liquid to filter solids |
| 03/30/1993 | US5198105 Device for solids recycle in longitudinal-flow fluid-bed reactors for effluent treatment with carrier particles |
| 03/30/1993 | US5198073 Methods for treating the surface of a solid body |
| 03/24/1993 | EP0533471A2 Treatment of contaminated substances |
| 03/24/1993 | EP0533277A2 Process for the microbial oxidation of sulphidic wastes |
| 03/24/1993 | EP0516744A4 Method and apparatus for recirculation of liquids |
| 03/23/1993 | US5196339 Biooxidation |
| 03/23/1993 | US5196176 Sulfur reducing bacteria and sulfur oxidizing bacteria |
| 03/23/1993 | US5196125 Underground effluent disposal-delivery system |
| 03/23/1993 | US5196121 Decomposition of halogenated aliphatic hydrocarbons in a bioreactor |
| 03/23/1993 | US5196114 Aerobic septic system |
| 03/23/1993 | US5196111 Tanks, aerobic, anaerobic, nitrification, denitrification |
| 03/18/1993 | WO1993005187A1 Method of separating oleophilic-hydrophobic material from wash water |
| 03/18/1993 | WO1993005142A1 Apparatus for monitoring liquids |
| 03/18/1993 | WO1993004990A1 Method and system for biologically removing nitrogen from wastewater |
| 03/18/1993 | WO1993004989A1 Method of exhausting dissolved oxygen in a nitrogen removal wastewater treatment process |
| 03/18/1993 | WO1993004988A1 Process for degrading organic matter |
| 03/18/1993 | DE4130424A1 Appts. and process for biological elimination of nitrogen - using microorganisms immobilising on carrier contg. iron turnings |
| 03/18/1993 | CA2117084A1 Method and system for biologically removing nitrogen from wastewater |
| 03/18/1993 | CA2116550A1 Process for degrading organic matter |
| 03/17/1993 | EP0531955A2 Method and apparatus for the determination of nitrification activity in a waste water stream or basin and its application |
| 03/17/1993 | EP0531954A2 Process and apparatus for controlling the metering of carbon source in the denitrification step of a waste water purification plant |
| 03/17/1993 | EP0531864A1 Process for the treatment of waste water containing salts |
| 03/17/1993 | EP0531587A1 Method and system for separating lipophilic substances |
| 03/17/1993 | EP0531586A1 Method and system for processing organic waste liquid |
| 03/17/1993 | CA2078280A1 Process for the microbial oxidation of sulphidic wastes |
| 03/16/1993 | US5194231 Packing in or for a vessel |
| 03/16/1993 | US5194147 Decontamination system |
| 03/16/1993 | US5194144 Apparatus for aeration of septic tanks |
| 03/11/1993 | DE4129859A1 Anaerobic biological cleaning appts. for organically contaminated water - comprises fixed bed reactor using packing material heavier than water and supported on perforated plate |
| 03/11/1993 | DE4129586A1 Device for recovering albuminous nutrients from waste water - comprises bio-reactor and floatation cell combined in single unit and part of outlet sludge from floatation cell is passed via weir directly back into reactor |
| 03/11/1993 | DE4123354C1 Mobile water-aerating or oxygenating equipment - includes delivery pipe with distribution having vertical pipe rotatable about bearing by water streams |
| 03/10/1993 | EP0531255A2 Packing elements for mass- and/or heaterexchange |
| 03/10/1993 | EP0530672A1 Washable filter |
| 03/09/1993 | US5192456 Apparatus for treating activated sludge and method of cleaning it |
| 03/09/1993 | US5192442 Multiple zone batch treatment process |
| 03/09/1993 | US5192441 Process and installation for biological treatment, e.g. by nitrification and/or denitrification, of an effluent including nitrated pollution |
| 03/09/1993 | US5192428 Portable system for treating human waste |
| 03/04/1993 | DE4235540A1 Simple and domestic sewage clarification system - contains clarification and oxidn. shafts in single tank and feed and discharge pipes |
| 03/04/1993 | DE4228690A1 Waste water clarification appts. |
| 03/03/1993 | EP0529422A1 Filling element |
| 03/03/1993 | EP0528901A1 Improved method for solute transfer between solid and liquid phases. |
| 03/03/1993 | EP0367764B1 Process for disposal, and in particular hygienic treatment, of the sludge formed in a clarification plant |
| 03/03/1993 | CN1069446A Fabricating technology for sleeve of sleeve-type micropprous aeration device |
| 03/02/1993 | US5190670 Process and system for separating and condensing contaminants from a liquid |
| 03/02/1993 | US5190655 Water purification process 2 |
| 03/02/1993 | US5190646 Hollow vertical column, water supply means, continuous pore ceramic element, air bubble supply means, overflow outlet, sludge drain outlet, treated water outlet |
| 03/02/1993 | US5190644 Motion controller for wastewater treatment trickling filter |
| 03/01/1993 | WO1993004770A2 Aerator for a liquid-filled basin |
| 03/01/1993 | WO1993004760A1 Method and device for the filtration of a liquid containing suspension particles |
| 03/01/1993 | CA2095040A1 Process and device for filtering a liquid with suspensions |
| 02/24/1993 | EP0528786A1 Biological waste water purification plant |
| 02/24/1993 | EP0528110A1 Process for the biological purification of exhaust air |
| 02/24/1993 | EP0527959A1 Biological system for degrading nitroaromatics in water and soils |
| 02/24/1993 | EP0527751A1 Modular clarifier with integral flocculator |
| 02/24/1993 | CN1069308A Portable system for treating human maste |
| 02/24/1993 | CN1069248A Agitated shell breaking-up device coupled with methane-generating pit |
| 02/18/1993 | WO1993002972A1 Activated sludge process for sewage purification |
| 02/18/1993 | WO1993002971A1 Process for removal of organic pollutants from wastewater |
| 02/18/1993 | WO1993002970A1 A process of and apparatus for treating a fluid |
| 02/18/1993 | WO1993002763A1 Soil and sludge treatment apparatus and method including agitation, aeration and recirculation |
| 02/18/1993 | DE4229960A1 Increasing clarification plant treatment capacity - by heating waste water feed using e.g. waste heat |
| 02/18/1993 | DE4126736A1 Single stage waste water purificn. plant - has aeration tank with rotary aeration bridge having turbulator propeller, for increased purificn. capacity e.g. denitrification |
| 02/18/1993 | CA2115035A1 Activated sludge process for sewage purification |
| 02/18/1993 | CA2114003A1 A process and apparatus for treating a fluid |
| 02/17/1993 | EP0527614A1 Purification of oxidatively labile organic compouds by selectively removing cyanide using a cyanide reacting enzyme |
| 02/16/1993 | US5186842 Method for removing low molecular weight contaminants |
| 02/16/1993 | US5186837 Method for biological purification of wastewater with no excess sludge |
| 02/16/1993 | US5186821 Wastewater treatment process with cooperating velocity equalization, aeration and decanting means |
| 02/10/1993 | EP0527123A1 Activated sludge wastewater treating process |
| 02/10/1993 | EP0526864A1 Process and apparatus for eliminating odours from waste water treatment |
| 02/10/1993 | EP0526853A1 Oxidation ditch velocity control system |
| 02/10/1993 | EP0526823A1 A gas diffusion article |
| 02/09/1993 | US5185415 Cationic vinylpyridine copolymers insoluble in water on surface of substrate; germicides; water, sewage treatment |
| 02/09/1993 | US5185080 Process for the on-site removal of nitrates from wastewater |
| 02/09/1993 | US5185079 Anaerobic sequencing batch reactor |
| 02/07/1993 | CA2075450A1 Method and device for filtering waste gases of waste water treatment plants |
| 02/04/1993 | WO1993002015A1 A device for the treatment/purification of sewage-effluent |
| 02/04/1993 | WO1993001711A1 Method and installation for processing pig manure into protein forage and biohumus |
| 02/04/1993 | DE4225210A1 Ultra-pure water appts. - has vigorous gas mixture with water at feed to the reaction vessel with separate outlets for gas and water |
| 02/04/1993 | DE4125471A1 Exhaust gas cleaning in which solvent is sepd. from washing fluid - has separate stages to separate activated sludge and solvent from washing fluid at absorption tower |
| 02/04/1993 | DE4119869C1 Removal of ammonia and ammonium from drinking or waste water etc. - using zeolite rings of specified dimensions as filler etc. in reactor or column |
| 02/03/1993 | EP0526328A1 Process for removal of organic nutrients containing carbon, nitrogen and phosphorus |
| 02/03/1993 | EP0525166A1 Composition and methods for removing or preventing biofilm. |
| 02/03/1993 | EP0368974B1 Process for producing silicon caoutchouc tube membranes with mechanical wall reinforcement, development of tube membranes with mechanical wall reinforcement and their use |