| Patents for C02F 3 - Biological treatment of water, waste water, or sewage (46,453) |
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| 01/21/1997 | US5595893 Immobilization of microorganisms on a support made of synthetic polymer and plant material |
| 01/21/1997 | US5595691 Air supply apparatus for pond fisheries |
| 01/15/1997 | EP0752909A1 Permeation and biological treatment of waste gas |
| 01/15/1997 | EP0664772B1 A method and a device for aerating waste water |
| 01/14/1997 | US5593592 Adding low concentration of aluminum hydroxide to raise bacteria to absorb and decompose unpleasant odor;flocculation |
| 01/14/1997 | US5593584 Septic tank filter |
| 01/14/1997 | US5593575 Floating cover and baffle system |
| 01/09/1997 | WO1997000834A1 Enzymatic method for the oxidative breakdown of fluorescent compounds |
| 01/09/1997 | WO1997000833A1 Sewage tank improvement |
| 01/09/1997 | WO1997000832A1 Controlling wastewater treatment by monitoring oxygen utilisation rates |
| 01/09/1997 | DE19523389A1 Enzymatische Methode zum oxidativen Abbau von fluoreszierenden Verbindungen Enzymatic method for the oxidative degradation of fluorescent compounds |
| 01/08/1997 | EP0752471A2 Hydrophobic bioremediants |
| 01/08/1997 | EP0751913A1 Process and device for simultaneous biological elimination of phosphorus and nitrogen from waste water |
| 01/08/1997 | EP0677024B1 Method for removing hydrogen sulphide from oil-containing water |
| 01/08/1997 | EP0556362B1 Method and device for the filtration of a liquid containing suspension particles |
| 01/08/1997 | CN2244557Y Elastic three-dimensional filling |
| 01/08/1997 | CN1139913A Water treatment method and apparatus |
| 01/08/1997 | CN1033747C Agitated shell breaking-up device coupled with methane-generating pit |
| 01/07/1997 | US5591634 Microbiological method for disposing of organic waste materials |
| 01/07/1997 | US5591342 Water treatment |
| 01/07/1997 | US5591328 Gas particle formation |
| 01/03/1997 | WO1997000123A1 Dual aeration and cooling system |
| 01/03/1997 | WO1996030306A3 Biological method of waste water treatment |
| 01/02/1997 | EP0751098A1 Method for purifying nitrogen-containing waste water streams |
| 01/02/1997 | EP0750591A1 Biofilm carrier for water and waste water purification |
| 01/02/1997 | EP0750590A1 Waste treatment plant and process |
| 01/02/1997 | DE19546921A1 Water treatment bio-reactor trap incorporates two particulate screens |
| 01/02/1997 | DE19523707A1 Waste water treatment incorporates anaerobic phosphate liberation stage |
| 01/02/1997 | DE19523263A1 Prodn. of biodegradable substances, esp. short-chain organic acids, by fermentation of raw sludge |
| 01/02/1997 | DE19522433A1 Combined domestic waste water and organic refuse treatment system |
| 01/01/1997 | CN1139078A Sewage treatment plant |
| 01/01/1997 | CN1139077A Biological soft stuffing |
| 12/31/1996 | US5589068 Water treatment and controllers |
| 12/31/1996 | CA2007974C Liquid oxidizing method and apparatus |
| 12/27/1996 | EP0749943A2 Process and device for purifying wastewater |
| 12/27/1996 | EP0749942A2 Installation for the biological treatment of waste water |
| 12/27/1996 | EP0749403A1 Process for purifying and reusing surfactant-containing waste waters |
| 12/27/1996 | EP0654015B1 Process and device for the biological treatment of organically polluted waste water and organic waste |
| 12/25/1996 | CN1138847A Method for cleaning contaminated water |
| 12/25/1996 | CN1138559A Method for treatment of waste water in wet fields for planting xylophyta |
| 12/24/1996 | US5587320 Solid organic waste processing apparatus |
| 12/24/1996 | US5587317 Chemical-biological process for dehalogenation of halogenated organic compounds |
| 12/24/1996 | US5587239 Ball-like structures and contacting materials for wastewater-treatment |
| 12/24/1996 | US5587114 Aeration system employing retrievable aeration modules |
| 12/24/1996 | US5587081 Water treatment; destroying pathogenic organisms |
| 12/24/1996 | US5587080 Gas impermeable cover; gas collection conduit; collection of emanating gases |
| 12/24/1996 | US5587079 Using bacteria |
| 12/22/1996 | CA2179449A1 Biofilter |
| 12/19/1996 | WO1996039823A1 Methods for reducing environmental contaminants |
| 12/19/1996 | DE19623502A1 Filter for removing harmful substances and algae nutrients from water for aquariums or fish ponds |
| 12/19/1996 | DE19539042C1 Biological treatment of waste water, e.g. from communal, industrial or agricultural sources |
| 12/19/1996 | DE19538499A1 Dyke bio-filter for removing, e.g. heavy metals or mineral oils from contaminated soil, sludge or water |
| 12/19/1996 | DE19521959A1 Treatment of effluent from showers of sinks used by personnel in nuclear power station |
| 12/18/1996 | EP0748373A1 Micro-organism culture method |
| 12/18/1996 | EP0748304A1 Improvements in bioremediation of hydrocarbon contaminated soils and water |
| 12/18/1996 | EP0748298A1 Adsorbent biocatalyst porous beads |
| 12/18/1996 | EP0748297A1 Processing water in a biologically activated and continuously operating granular filter bed |
| 12/18/1996 | CN1138011A Improved process for removing phosphate |
| 12/17/1996 | US5585226 Aqueous bleaching or bleach-fixing solution containing metal complex of polyamino monosuccinic acid or salt |
| 12/17/1996 | US5585005 Bubbling gas stream having sulfur-containing impurities into aqueous catalytic solution for oxidation to solid sulfur particles, then frothing and adsorption of more impurities before skimming |
| 12/17/1996 | US5585004 Permeability to organic compound(s) exceeds permeability to chloride ion |
| 12/17/1996 | US5585001 Measuring dissolved oxygen |
| 12/15/1996 | CA2179135A1 Treatment system |
| 12/11/1996 | EP0747117A1 Filler block and method of production |
| 12/10/1996 | US5583041 Degradation of polyhalogenated biphenyl compounds with white-rot fungus grown on sugar beet pulp |
| 12/10/1996 | US5582734 Ending non-aeration period when the oxygen-reduction potential nitrate depletion inflection point has been reached |
| 12/10/1996 | US5582733 Method and installation for purifying water using variably agitated denitrifying physical-chemical sludge |
| 12/10/1996 | US5582732 Biological method of waste water treatment |
| 12/05/1996 | WO1996038389A1 Use of the yeast yarrowia lipolytica for the industrial biodegradation of oils and fats in sewage and biodegradation process using it |
| 12/05/1996 | WO1996038388A1 Use of fluidized bed reactors for treatment of wastes containing organic nitrogen compounds |
| 12/05/1996 | WO1996038387A1 Method for biological cleaning of water, for the substrate culture of plants, and a filter and a filter unit therefor |
| 12/05/1996 | WO1996038386A1 Concentration technique |
| 12/05/1996 | WO1996038239A1 Water recovery from a septic tank |
| 12/05/1996 | DE19622217A1 Car wash appts. that recycles, treats and stores used water |
| 12/05/1996 | DE19609605A1 Waste water treatment method suitable for rural households based on natural methods |
| 12/05/1996 | DE19519209A1 Bathroom water and filtration assembly collects water for discharge to toilet |
| 12/05/1996 | DE19511159C1 Waste water treatment for small communities in plant with caged ball reactor |
| 12/05/1996 | CA2222729A1 Water recovery from a septic tank |
| 12/04/1996 | EP0745562A2 Purification system for groundwater or wastewater; biochemical reactor and liquid-transport stirring apparatus |
| 12/04/1996 | EP0745060A1 Stormwater treatment system/apparatus |
| 12/04/1996 | EP0745006A1 Process for the treatment of contaminated land |
| 12/04/1996 | EP0744982A1 Process for the treatment of contaminated material |
| 12/03/1996 | US5580770 Polymeric foam substrate bound to adsorber particles by latex binder |
| 12/03/1996 | US5580644 Cutting one or more pieces of fabric, joining to form a junction; excellent shape stability, utilized as a carrier for fixing or immobilizing microorganisms |
| 12/03/1996 | US5580458 Defluorination by flocculation |
| 12/03/1996 | US5580457 Waste handling method |
| 12/03/1996 | US5580453 Filter apparatus for waste water discharge system |
| 12/03/1996 | US5580449 Sewage treatment apparatus |
| 12/01/1996 | CA2173397A1 Biochemical reactor of liquid current type, groundwater and wastewater purifying system equipped therewith, and liquid transport-stirring apparatus that employs the transport means used in said reactor and system |
| 11/28/1996 | WO1996037444A1 Method of aerobically treating wastewater and treatment tank |
| 11/28/1996 | WO1996037443A1 Carrier-separating and water-collecting mechanism of wastewater treatment equipment |
| 11/28/1996 | DE19533632C1 Biological water treatment appts. sieve grains scoured by rotating suction pipe |
| 11/28/1996 | DE19519553A1 Immersed aerator |
| 11/28/1996 | DE19519325A1 Substrate material for a bio:reactor for treating effluent water |
| 11/28/1996 | DE19518191A1 Process and assembly expel foul gas from sludge |
| 11/28/1996 | CA2221923A1 Method of aerobically treating liquid-waste and treatment tank |
| 11/28/1996 | CA2221721A1 Carrier-separating and liquid-collecting mechanism for liquid-waste treatment apparatus |
| 11/27/1996 | EP0743927A1 Improved wastewater treatment process |
| 11/27/1996 | EP0743925A1 Novel compositions and methods for water treatment |
| 11/27/1996 | EP0689523B1 Process for the purification of waste water,in particular communal waste water |