| Patents for C02F 3 - Biological treatment of water, waste water, or sewage (46,453) |
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| 01/28/1988 | DE3623931A1 Activation plant having a floating aeration bridge |
| 01/28/1988 | DE3623431A1 Multiple stage bioreactor |
| 01/26/1988 | US4721585 Process for the biological treatment of sewage |
| 01/26/1988 | US4721570 Sewage treatment, rotating biological contactor tanks |
| 01/26/1988 | US4721569 Phosphorus treatment process |
| 01/26/1988 | CA1232090A1 Method and apparatus for treating organic waste water |
| 01/26/1988 | CA1232056A1 Automatic observation system for microorganisms and the like |
| 01/21/1988 | DE3622750A1 Process and apparatus for sanitising sludge |
| 01/19/1988 | US4720360 Diffused aeration system |
| 01/19/1988 | US4720344 Nitrification process in waste water treatment |
| 01/14/1988 | WO1988000173A1 System for feeding gases to liquids, especially for aerating waste waters |
| 01/14/1988 | DE3621313A1 Process for the microbial degradation of contaminants |
| 01/14/1988 | DE3620980A1 Continuous multiple-stage process for treating the bleaching waste waters from wood pulp production |
| 01/07/1988 | EP0252070A2 Apparatus for aerobic waste water purification |
| 01/07/1988 | EP0252069A2 Apparatus for waste sludge treatment |
| 01/07/1988 | EP0251320A2 Microorganisms for degrading toxic waste materials |
| 01/07/1988 | EP0250998A2 Apparatus and process for the culture of immobilized micro-organisms |
| 01/07/1988 | EP0250475A1 Method and plant for the recovery of energy from waste and residues. |
| 01/07/1988 | DE3622721A1 Process for denitrifying water |
| 01/07/1988 | DE3621333A1 Process for the degradation of waste gypsum and apparatus for carrying out the process |
| 01/05/1988 | US4717519 Multiple fiber loops on narrow curled strips of thermoplastic cloth |
| 01/05/1988 | CA1231184A1 Method at anaerobic wastewater treatment |
| 12/30/1987 | WO1987007886A1 A method and a device for introducing a gas into a liquid |
| 12/29/1987 | US4715966 Septic tank sludge level indicator |
| 12/29/1987 | US4715958 Carrier for nutrients for denitrifying bacteria |
| 12/23/1987 | EP0250316A1 Gas transfer and flotation process for the treatment of water |
| 12/23/1987 | EP0249861A2 Process for the biological purification of exhaust air and waste water |
| 12/22/1987 | US4714548 Device for purification of waste water |
| 12/17/1987 | WO1987007590A1 Process and device for large surface-area fine-bubble gasification of liquids |
| 12/17/1987 | WO1987007475A1 Fish basin for intensive fish-fattening and process for operating such a fish basin |
| 12/16/1987 | EP0249433A1 Improvements in rotating biological contactors, and a method for their manufacture |
| 12/16/1987 | EP0249172A1 Process for biological waste water purification |
| 12/16/1987 | EP0249014A1 Media aerator |
| 12/16/1987 | EP0248959A1 Turbulence control system of an intra-channel clarifier |
| 12/16/1987 | EP0248900A1 Process for supplying oxygen from fermentation plant and device for implementation of the process |
| 12/15/1987 | USRE32562 Draft member conically flared; efficiency |
| 12/15/1987 | US4713343 Water purification using microorganisms capable of aerobic degradation of low molecular weight alkanes |
| 12/15/1987 | US4713340 Using a flavobacterium species |
| 12/15/1987 | US4713173 Three element aquarium filter cartridge |
| 12/15/1987 | US4713172 Apparatus for improved aeration of liquids |
| 12/10/1987 | DE3619247A1 Apparatus for the biological purification of waste water |
| 12/10/1987 | DE3619229A1 Multiple-stage process for substantial waste water purification by biological oxidation of organic hydrocarbon compounds (BOD removal), a biological nitrogen elimination without external H donors and subsequent filtration and plant for carrying out the process |
| 12/09/1987 | EP0248709A1 Biological activator for septic tanks |
| 12/09/1987 | EP0185705B1 Liquid multisolid fluidized bed processing |
| 12/08/1987 | US4711721 Waste water sludge thickener with odor control |
| 12/03/1987 | WO1987007316A1 Bacterial composition and method for purifying water and soil of oil pollution |
| 12/02/1987 | EP0247519A1 Method for sewage purification |
| 12/02/1987 | EP0247505A1 Air-driven contact filter |
| 12/02/1987 | EP0247212A2 Process for the biological purification of water or waste water to remove organic nitrogen-contaning impurities |
| 12/02/1987 | EP0247162A1 Centrifugal oxygenator for treatment of waste water and system. |
| 12/01/1987 | US4710356 Apparatus to accelerate the transfer of material between two media reacting in a fluidized bed |
| 12/01/1987 | US4710301 Wastewater purification process |
| 12/01/1987 | US4710300 Method for processing of organic materials containing nitrogen compounds |
| 12/01/1987 | US4710295 Septic tank filters |
| 12/01/1987 | US4710292 Digester tank with foam control cover |
| 12/01/1987 | CA1229807A1 Process for biological conversion of substrates |
| 11/26/1987 | DE3716782A1 Process and apparatus for purifying waste waters containing organic substances, in particular for the effective removal of phosphorus and nitrogen |
| 11/25/1987 | EP0246695A1 Plastic profile for rotating biological contactors |
| 11/25/1987 | CN87206301U Mixing air blaster with jet-pipe |
| 11/25/1987 | CN87102714A Purification method for the waste water produced from hardboard wet process |
| 11/24/1987 | US4708792 Filter medium |
| 11/24/1987 | CA1229686A1 Process and apparatus for the removal of heavy metals contained in wastewater |
| 11/19/1987 | WO1987003615A3 Process for supplying oxygen from fermentation plant and device for implementation of the process |
| 11/19/1987 | EP0245910A1 A process for purifying waste water |
| 11/19/1987 | EP0245775A2 Method and apparatus for treating polluted fluids |
| 11/19/1987 | DE3715249A1 Growth support for increasing biomass concentration in shaft-type vertical reactors |
| 11/19/1987 | DE3615971A1 Process and plant for the treatment of sludge |
| 11/17/1987 | US4707254 Upflow type with sludge blanket; anaerobic |
| 11/17/1987 | US4707252 Fluid bed reactor for the biological treatment of water |
| 11/11/1987 | EP0245062A2 Water treatment apparatus |
| 11/11/1987 | EP0244954A1 Method and system for enriching oxygen content of water |
| 11/11/1987 | EP0244695A1 Use of polymer carriers in biochemical conversion processes in the aqueous phase |
| 11/11/1987 | EP0244593A1 Apparatus for biological waste water purification in ponds |
| 11/10/1987 | US4705634 Process and apparatus for the biological purification of wastewater |
| 11/10/1987 | US4705633 Nitrification with sludge reaeration and ammonia enrichment |
| 11/05/1987 | WO1987006572A1 Improvements in rbc waste-water treatment plant |
| 11/05/1987 | DE3714591A1 Process and apparatus for treating digested sewage sludge |
| 11/05/1987 | DE3712115A1 Apparatus for deep flow aeration for waste water treatment |
| 11/05/1987 | DE3614865A1 Device for sludge treatment |
| 11/04/1987 | EP0244029A1 Equipment for the anaerobic purification of waste water |
| 11/04/1987 | EP0243764A2 Device for introducing gases |
| 11/04/1987 | EP0243678A2 Process and installation for liquid purification employing a controlled-flow filter bed containing plants |
| 11/03/1987 | US4704204 Installation for injecting oxygen into liquid media |
| 11/03/1987 | CA1228939A1 Split feed for the anaerobic biological purification of wastewater |
| 11/03/1987 | CA1228938A1 Biological flocculation of mineral slimes |
| 10/29/1987 | DE3613625A1 Process and apparatus for aerating a liquid, in particular waste waters (effluents) |
| 10/29/1987 | DE3613575A1 Method for immobilising microorganisms and/or enzymes |
| 10/27/1987 | US4702830 Water aeration apparatus |
| 10/27/1987 | CA1228685A1 Digester for the continuous production of biomethane from organic substances |
| 10/21/1987 | EP0241999A1 Anaerobic purification of waste water containing sulphate and organic material |
| 10/21/1987 | EP0241746A2 Microbial degradation of hydrocarbons |
| 10/21/1987 | EP0241602A1 Anaerobic purification of wastewater, containing sulphate and organic material |
| 10/21/1987 | CN87101969A Method for treating waste water from catalytic cracking unit |
| 10/20/1987 | US4701287 Apparatus for the exchange of material and/or heat between and/or for mixing of gaseous and/or liquid substances |
| 10/20/1987 | CA1228434A1 Treatment of wastewater containing phosphorus compounds |
| 10/20/1987 | CA1228433A1 Removal of phosphates and bod from wastewaters |
| 10/20/1987 | CA1228432A1 Nitrogen and phosphorous removal from wastewater |
| 10/20/1987 | CA1228431A1 Enzymatic removal of aromatic hydroxy compounds and aromatic amines from waste waters |
| 10/15/1987 | DE3709316A1 Process for purifying waste water and for sludge treatment |
| 10/14/1987 | EP0240929A2 Carrier for the immobilization of micro-organisms |