| Patents for C02F 3 - Biological treatment of water, waste water, or sewage (46,453) |
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| 08/16/1983 | US4399031 Biological sewage treatment apparatus of the rotary disc type |
| 08/16/1983 | CA1152240A1 Sewage treatment apparatus and method |
| 08/10/1983 | EP0085421A1 Process and apparatus for the biological treatment of sludge |
| 08/09/1983 | CA1151526A1 Draft device for a bubble column |
| 08/03/1983 | EP0084879A1 Method for the anaerobic digestion of rinse and wash waters and settled sludge transport waters containing calcium ions |
| 08/03/1983 | EP0084650A1 Contact aerator for biological sewage purification |
| 08/03/1983 | EP0024422B1 Water purification system employing ozone injection |
| 08/02/1983 | US4396507 For waste water treatment |
| 08/02/1983 | US4396402 Gas production by accelerated bioleaching of organic materials |
| 07/27/1983 | EP0084316A2 Process and device for mixing and circulating gases and liquids |
| 07/27/1983 | EP0084042A1 Anaerobic fermentation |
| 07/20/1983 | EP0083832A1 Process for separating carbonic acid gas from methane-rich gas |
| 07/20/1983 | EP0083586A1 Apparatus for fermentation of organic material. |
| 07/19/1983 | US4394268 Conversion of plug flow and complete mix aeration basins to barrier oxidation ditches |
| 07/19/1983 | US4394136 System for recovering methane gas from liquid waste |
| 07/19/1983 | CA1150175A1 Application of a process for separating oils or petroleum hydrocarbons |
| 07/12/1983 | US4392955 Sedimentation and clarification |
| 07/12/1983 | US4392954 Sewage ventilating basin |
| 07/05/1983 | US4391887 Preparations of micro-organisms |
| 07/05/1983 | US4391705 Ballasting digestor covers |
| 07/05/1983 | US4391704 Gas-extraction arrangement for wastewater settling tank |
| 07/05/1983 | US4391703 Marine sewage treatment with biological filter |
| 07/05/1983 | US4391002 Water-closet for vehicles, particularly motor coaches |
| 07/05/1983 | CA1149374A1 Diffuser system |
| 06/29/1983 | EP0082814A1 Microorganisms of the genus pseudomonas and method for the decomposition of compounds containing methyl groups in aqueous solutions |
| 06/28/1983 | US4390432 Treatment with ultraviolet radiation and microorganisms supported on synthetic resin bed; biooxidation |
| 06/28/1983 | US4390422 Apparatus for the biological purification of water |
| 06/22/1983 | EP0082114A1 Microorganisms of the genus Hyphomicrobium and method for the decomposition of compounds containing methyl groups in aqueous solutions |
| 06/21/1983 | US4389312 Variable venturi sewerage aerator |
| 06/21/1983 | CA1148673A1 Ring channel aeration apparatus and method |
| 06/14/1983 | US4388186 Sludge treating apparatus |
| 06/14/1983 | CA1148282A1 Anaerobic filter |
| 06/08/1983 | EP0080981A1 A method for producing an aqueous solution of high phosphorous content, recovering iron compounds constituting precipitating agents, and separating heavy metals in a sewage-water or raw-water purification plant |
| 06/07/1983 | US4387025 Purifying contaminated water |
| 06/07/1983 | US4387020 For waste water treatment system |
| 06/07/1983 | CA1147874A1 Biological filter and process |
| 05/31/1983 | US4385988 Packing element for a biological filter or for use in mass transfer |
| 05/31/1983 | US4385987 Rotating disc type |
| 05/31/1983 | CA1147483A1 Recovery of metals |
| 05/24/1983 | US4384956 Waste water purification |
| 05/24/1983 | US4384897 Hydrolysis with a second stage phase separation step |
| 05/24/1983 | CA1146884A1 Biotransformations using methane-utilizing bacteria |
| 05/24/1983 | CA1146883A1 Process for dissimilatory denitrification of tobacco materials |
| 05/24/1983 | CA1146813A1 Apparatus and method for treating sewage sludge |
| 05/18/1983 | EP0078919A1 Process and apparatus for the treatment of waste water sludge |
| 05/18/1983 | EP0078824A1 Water oxidation plant for waters, especially intended for fish ponds |
| 05/17/1983 | US4383922 Waste water clarifier |
| 05/11/1983 | WO1983001613A1 Lamellar construction for treating liquids |
| 05/11/1983 | EP0078660A2 Efficient axial flow impeller for mixing |
| 05/10/1983 | US4382873 Dispersant and biodegradant formulations for treating hydrocarbon-polluted waters |
| 05/10/1983 | CA1146101A1 Process and an agent for the removal of ascorbic acid from aqueous liquids |
| 05/04/1983 | EP0078033A1 Improved continuous process and plant for tertiary photobiological treatment of waste water |
| 05/04/1983 | EP0077856A1 Process for the preparation of an inoculum for the maintenance of septic tanks and the like, comprising dehydrated microorganisms and enzymes, and inoculums prepared by this process |
| 05/04/1983 | EP0077848A1 A fluid treatment packing and a method of treating fluid using the packing |
| 05/03/1983 | US4382044 Water purification system employing ozone injection |
| 05/03/1983 | CA1145867A1 Purification process for waste and/or industrial water containing hydrocarbons |
| 05/03/1983 | CA1145866A1 Sewage and waste water treatment |
| 04/27/1983 | EP0077654A1 A process and apparatus for promoting growth of biomass |
| 04/27/1983 | EP0077422A1 Bacterial strain for purifying hydrocarbons pollution, process for production thereof and purification process using said bacterial strain |
| 04/26/1983 | US4381268 Device for gassing liquids or suspensions |
| 04/26/1983 | CA1145268A1 Separation process and apparatus |
| 04/20/1983 | EP0077002A1 Process and installation for the anaerobic treatment of waste water and for the production of methane-containing biogas |
| 04/20/1983 | EP0076977A1 Apparatus for waste water purification |
| 04/20/1983 | EP0076976A1 Clarification device with at least one rotating contact aerator |
| 04/20/1983 | EP0076953A2 Pseudomonas compositions |
| 04/20/1983 | EP0076898A1 Installation for the biological purification of water or waste water |
| 04/19/1983 | CA1145073A1 Advanced means for biological treatment of water |
| 04/13/1983 | EP0076537A1 A method for the anaerobic fermentation of waste water |
| 04/12/1983 | CA1144666A1 Sewage treatment |
| 04/12/1983 | CA1144665A1 Waste-water treatment plant and method |
| 04/06/1983 | EP0075885A1 Microorganisms for the microbiol degradation of obnoxious organic wastes into innocuous materials |
| 04/05/1983 | US4379050 Granular fluid biofilter reversing |
| 03/31/1983 | WO1983001015A1 Improved packing element |
| 03/30/1983 | EP0075298A2 Process and apparatus for the biological purification of waste water |
| 03/30/1983 | EP0075297A2 Process for the biological denitrification of waste water |
| 03/29/1983 | US4378165 Draft tube apparatus |
| 03/29/1983 | EP0065983A4 Sewage treatment system. |
| 03/29/1983 | CA1143684A1 Downflow bioreactor |
| 03/23/1983 | EP0074375A1 Lamellar construction for treating liquids |
| 03/22/1983 | US4377395 Process and apparatus for gassing liquids |
| 03/22/1983 | CA1143487A1 Process for biological treatment of waste water |
| 03/22/1983 | CA1143486A1 Control of activated sludge wastewater treating process for enhanced phosphorous removal |
| 03/22/1983 | CA1143293A1 Apparatus and process for treating liquid material while subjected to a centrifugal force |
| 03/17/1983 | WO1983000856A1 Method for the biochemical digestion of organic substances |
| 03/16/1983 | EP0074290A1 Process and installation for realizing the degradation of organic products, by-products and wastes in an anaerobic medium |
| 03/16/1983 | EP0074100A1 Biochemically enhanced absorption system for volatile organic materials |
| 03/15/1983 | US4376702 Waste disposal apparatus |
| 03/15/1983 | US4376701 Waste water treating apparatus |
| 03/15/1983 | CA1143078A1 Apparatus and method for mixing gases with liquids |
| 03/15/1983 | CA1143076A1 Process for removing oils or petroleum hydrocarbons from the surface of the sea |
| 03/09/1983 | EP0073675A1 Continuous fermentation apparatus and process |
| 03/09/1983 | EP0073415A2 Apparatus for dispensing a second phase into a first phase |
| 03/09/1983 | EP0073266A1 Apparatus for biological waste water treatment and process of operating it |
| 03/03/1983 | WO1983000684A1 Method and device for the purification of waste waters |
| 03/01/1983 | US4375412 Methods for the treatment of organic material and particularly sewage sludge |
| 02/23/1983 | EP0072495A2 Process and installation for the biological purification of waste water |
| 02/23/1983 | EP0072427A1 Process and apparatus for waste water purification |
| 02/22/1983 | US4374735 Method for removal of oil from sorbents using glycolipids |
| 02/22/1983 | US4374730 Process and apparatus for the biological purification of sewage |
| 02/22/1983 | CA1141871A1 Liquid circulating device |