| Patents for C02F 3 - Biological treatment of water, waste water, or sewage (46,453) |
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| 09/05/1989 | US4863872 Novel pseudomonas microorganism for biodegradation of liquid scintillation cocktails |
| 09/05/1989 | US4863644 Gas diffuser |
| 09/05/1989 | US4863606 Multicompartment anaerobic digestion |
| 09/05/1989 | US4863595 Apparatus for degrading biodegradable material |
| 09/05/1989 | CA1259044A1 Biological contact gas scrubber for waste gas purification |
| 08/31/1989 | DE3805615A1 Process and apparatus for decreasing the pollutant content of waste water |
| 08/30/1989 | EP0329703A1 High yield air diffuser for tanks used in the aerobic treatment of waste waters. |
| 08/30/1989 | CN1035100A Technique and installation of removing the iron and manganese in ground-water by the method of biological filtration basin |
| 08/29/1989 | US4861483 Apparatus and process to eliminate diffusional limitations in a membrane biological reactor by pressure cycling |
| 08/29/1989 | US4861482 Selenium detoxification |
| 08/29/1989 | US4861471 Activated sludge treatment apparatus |
| 08/23/1989 | EP0329404A1 Aeration equipment |
| 08/23/1989 | EP0328821A1 Two-stage wastewater treatment process |
| 08/23/1989 | EP0328758A1 Process and device for the biological cleaning of waste gas |
| 08/23/1989 | EP0328708A1 Process for cleaning exhaust air |
| 08/23/1989 | EP0328560A1 Mineral substance, process for its manufacture and use thereof. |
| 08/23/1989 | EP0205465B1 Dynamic anaerobic filter |
| 08/22/1989 | US4859594 Microorganisms for biodegrading toxic chemicals |
| 08/22/1989 | US4859341 Simultaneously monitoring turbidity level of waste water, and oxygen concentration in aeration tank |
| 08/22/1989 | US4859327 Means for water and wastewater treatment |
| 08/22/1989 | US4859325 Waste material treatment apparatus |
| 08/22/1989 | US4859321 Aeration type water treating device |
| 08/17/1989 | DE3804573A1 Process for treating a solution, in particular for wastewater purification |
| 08/17/1989 | DE3803841A1 Water activation device |
| 08/16/1989 | EP0328474A1 Process and apparatus for the biological purification of organic compounds and derivatives containing water by the diffusion and activity of aerobic and anaerobic microorganisms |
| 08/15/1989 | US4857458 Installation and plant for the recovery of energy from waste and residues |
| 08/15/1989 | US4857198 Process for treatment of water containing volatile and toxic compounds |
| 08/15/1989 | US4857185 Aerated facultative basin having a dual function aeration and sludge removal pump in adjacent well |
| 08/15/1989 | CA1258436A1 Mat structure for use in filtration devices |
| 08/10/1989 | WO1989007089A1 Anoxic ammonia oxidation |
| 08/10/1989 | WO1989007015A1 A process and apparatus for separating fine particles by microbubble flotation together with a process and apparatus for generation of microbubbles |
| 08/10/1989 | WO1989006992A1 Installation and device for purifying contaminated soils |
| 08/10/1989 | DE3802369A1 Plant for the purification of contaminated soils |
| 08/09/1989 | EP0327184A1 Anoxic ammonia oxidation |
| 08/09/1989 | EP0326731A1 Sewage treatment plant |
| 08/09/1989 | EP0323970A4 Sewage treatment. |
| 08/09/1989 | CN2042465U High efficiency dissoving oxygen in water device |
| 08/09/1989 | CN2042464U Aeration device for dissolving oxygen in water |
| 08/08/1989 | US4855052 Foam-containing polyurethane (urea) compositions and process for the preparation thereof |
| 08/08/1989 | US4855051 Bacillus coagulans, arthrobacter globiformis or pseudomonas stutzeri |
| 08/08/1989 | US4855040 Installation for purifying liquids using a through-flow-controlled aquatic plant-containing filter bed |
| 08/03/1989 | DE3901404A1 Process for the anaerobic fermentation of organic waste products |
| 08/03/1989 | DE3800713A1 Device for the purification of wastewaters having numerous chambers provided in at least one container |
| 08/02/1989 | EP0325938A1 Multiple stage gas absorber |
| 08/02/1989 | EP0325720A1 Method for treating a cyano-containing waste liquid |
| 08/02/1989 | EP0325643A1 Apparatus for anaerobic treatment of waste water |
| 08/01/1989 | US4853334 Method for the degradation of volatile chlorinated aliphatic hydrocarbons using pseudomonas fluorescens |
| 08/01/1989 | US4853136 Process for oxidizing substances dissolved or in suspension in an aqueous solution |
| 08/01/1989 | CA1258066A1 Gas diffuser with indefinite life and mixed bubble size capacity |
| 07/26/1989 | EP0325337A2 Process for reducing the hysteresis effect in a gaslift loop reactor with suspended solid particles |
| 07/26/1989 | CN1034186A Carrier and method for waste water treatment |
| 07/25/1989 | US4851163 Biofouling resistant apparatus for wastewater treatment |
| 07/25/1989 | US4850537 Method and apparatus for producing multivortex fluid flow |
| 07/20/1989 | DE3800613A1 Apparatus for treating water |
| 07/19/1989 | EP0324314A1 Carrier and reactor for biological treatment of liquids and use thereof |
| 07/19/1989 | EP0323970A1 Sewage treatment. |
| 07/18/1989 | US4849139 Device for aerating water |
| 07/18/1989 | US4849108 Process for purifying waste water |
| 07/18/1989 | US4849101 Aeration device with a protection skirt |
| 07/18/1989 | US4848749 Diffuser for aeration basin |
| 07/18/1989 | CA1257717A1 Anaerobic purification equipment for waste water |
| 07/13/1989 | DE3900153A1 Process and apparatus for the biological and physical purification of waste waters |
| 07/13/1989 | DE3843789A1 Process and apparatus for treating organic waste products made of solids and liquids, in particular slurry (liquid manure) |
| 07/13/1989 | DE3842809A1 Plant for the mechanical and biological purification of waste waters |
| 07/13/1989 | DE3744409A1 Process and apparatus for reducing gas emissions from flowing, fluid media with volatile contents |
| 07/12/1989 | EP0323705A1 Two-stage wastewater treatment process |
| 07/12/1989 | EP0323610A1 Process and device for thickening waste water sludges and/or other organic sludges by means of separating water from solids |
| 07/11/1989 | US4846969 Activated sludge device having movable perforated plates and a nozzle for the destruction of foam |
| 07/11/1989 | US4846965 Oxygen controlling wastewater treatment system |
| 07/11/1989 | CA1257410A1 Reaction vessel |
| 07/05/1989 | EP0322929A1 Product and process for the biological regeneration of an aquatic medium, especially aquarium water |
| 07/05/1989 | CN1033612A Apparatus for removing froth in active sludge |
| 07/04/1989 | US4844816 Method of aeration at specific depth and pressure conditions |
| 07/04/1989 | US4844813 System and process for treatment of biodegradable waste |
| 07/04/1989 | US4844802 Apparatus for contacting a gas with a liquid, in particular for aerating waste water |
| 07/04/1989 | US4844800 Apparatus for waste water treatment |
| 06/29/1989 | WO1989005578A1 Process and installation for treating the waste water from aquaculture installations by nitrification and oxygenation |
| 06/29/1989 | DE3742642A1 Verfahren zur behandlung des prozesswassers von aquakulturanlagen durch nitrifikation und sauerstoffanreicherung sowie anlage zur durchfuehrung des verfahrens Process for the treatment of process water from aquaculture facilities through nitrification and oxygen enrichment and plant for carrying out the method |
| 06/28/1989 | EP0321456A1 Process for decomposing mineral oil derivatives contained in washings and sludges. |
| 06/27/1989 | US4843105 Process for the preparation of filler-containing, antionically modified polyurethane (urea) compositions, the polyurethane (urea) compositions so-obtained, and the use thereof |
| 06/27/1989 | US4843009 Pseudomonas putide capable of degrading PCBs |
| 06/27/1989 | US4843007 Aerobic treatment |
| 06/27/1989 | US4842920 Plastics elements for inordinate film-flow packings |
| 06/27/1989 | US4842779 Device for aerating water |
| 06/27/1989 | US4842732 Apparatus for aerating and mixing waste water |
| 06/27/1989 | CA1256603A1 Methane fermentation process for treating evaporator condensate from pulp making system |
| 06/22/1989 | DE3741613A1 Process for microbial nitrate breakdown (denitrification) in water, and method for carrying out this process |
| 06/21/1989 | EP0321081A2 Air supply method whereby water is raised for aeration |
| 06/20/1989 | US4840751 Process for contacting gases with liquids |
| 06/20/1989 | CA1256089A1 High specific area material and use thereof for improving contact between phases or reactants implying physical and/or chemical and/or biological processes |
| 06/15/1989 | WO1989005341A1 Microorganism for use in industrial processes |
| 06/14/1989 | EP0320084A1 Chemical treatment for algae control in open water systems |
| 06/14/1989 | CN2039308U Biolosis sewage purifying arangement |
| 06/14/1989 | CN1033371A Method for biological treatment of sewage by multistage submerged trickling filters |
| 06/14/1989 | CN1033370A Biological method for treating waste water |
| 06/13/1989 | US4839053 Biomass growth process with separate aeration and media compartments |
| 06/13/1989 | US4839052 Containing calcium and sulfate ions; an aerobic sulfate removal to produce hydrogen sulfide |
| 06/13/1989 | US4839051 Waste water flows through sloping zone containing soil and plants; free of chemical additives |
| 06/13/1989 | CA1255820A1 Apparatus for purifying water, comprising an upflow reactor with an influent distributing system to be connected to a central water supply system |
| 06/13/1989 | CA1255817A1 Process for decreasing the nitrate content in water |