| Patents for C02F 3 - Biological treatment of water, waste water, or sewage (46,453) |
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| 09/17/1992 | DE4108149A1 Procedure for cleaning liquids and gases using biological filter - gas gives up contaminant to absorber, clean gas picks up contaminant in greater concentration before entering biological filter |
| 09/17/1992 | DE4108031A1 Prodn. of floatable materials for absorption beds - by carbonising pre-expanded grain, esp. useful in anaerobic waste water treatment plants |
| 09/17/1992 | DE4108017A1 Low cost denitrification of water in fish breeding plants - comprises fermenting slime contg. fish food residues and faeces to give water soluble carbon-source which is added to water |
| 09/17/1992 | CA2105674A1 Method for cleaning of heat exchangers |
| 09/16/1992 | EP0504065A1 Process and installation for biological waste water purification |
| 09/16/1992 | EP0504019A1 Process for biological purification of water by nitrification and denitrification |
| 09/16/1992 | EP0503676A1 Device for enrichment of water with oxygen |
| 09/16/1992 | EP0503649A1 Process and apparatus for biological purification of waste waters polluted with non biodegradable or hardly biodegradable substances |
| 09/16/1992 | EP0503546A1 Process for biological purification of water |
| 09/16/1992 | EP0503438A2 Process for preparing agglomerates containing live and biologically active microorganisms |
| 09/16/1992 | EP0503115A1 Process and apparatus for biological purification of waste waters polluted with non-biodegradable or hardly biodegradable substances |
| 09/16/1992 | EP0417098B1 Method of sewage treatment |
| 09/16/1992 | CN2116007U Oxidation channel aeration turntable |
| 09/16/1992 | CA2062843A1 Process for the production of living agglomerates containing biologically active microorganisms |
| 09/15/1992 | WO1992016461A1 Method for the treatment of the sewages and respective plant |
| 09/15/1992 | US5147563 Sewage sludge treatment with gas injection |
| 09/15/1992 | US5147547 Oxidation and biological reduction reactor, biofiltration method and washing methods used in this reactor |
| 09/15/1992 | CA2099383A1 Method for the treatment of the sewages and respective plant |
| 09/10/1992 | DE4207077A1 Compact clarification plant for complete biological purificn. of waste water - has horizontal gap above line along which post-clarification chamber base meets second partition |
| 09/10/1992 | DE4107406A1 Packing material arrangement, e.g. for waste water treatment - in which vertical packing plates or paths are held together by distance pieces and tensioning system to form self-supporting unit |
| 09/10/1992 | DE4106781A1 Reducing acid and sulphate content of water in overburden deposits - by introducing nutrients into overburden from lignite mines to promote growth of bacteria which reduce sulphate(s) to hydrogen sulphide and insoluble sulphide(s) |
| 09/10/1992 | DE4102685A1 Biological purificn. of waste water |
| 09/09/1992 | EP0502232A1 Process for disposal of organic sludge, especially of paint sludge, originating from a coating installation |
| 09/09/1992 | EP0417185B1 A process for removing nitrogen compounds from raw water |
| 09/09/1992 | CN2115337U Disc microporosity aeration unit |
| 09/09/1992 | CN2114961U Photosynthetic bacteria applicator in use for pond |
| 09/09/1992 | CA2105670A1 Biological reaction processes |
| 09/08/1992 | US5145582 Method for stabilizing sludge |
| 09/08/1992 | CA1307362C Spiral tube aerator for waste water aeration |
| 09/08/1992 | CA1307361C Method for purifying waste water |
| 09/03/1992 | WO1992014682A1 Bacterial leaching process |
| 09/03/1992 | DE4206136A1 Aeration device consisting of base to which membrane is sealed - where membrane is held to rectangular baseplate by surrounding frame sleeve on base projects into air pipe and carries sealing ring |
| 09/02/1992 | EP0501355A1 Anaerobic water treatment process, in particular for the microbial elimination of nitrate from drinking water |
| 09/02/1992 | EP0501161A1 Device for introducing gas into waste waters |
| 09/02/1992 | EP0231275B1 Use of ligninolytic enzymes in paper pulp production |
| 09/01/1992 | US5143835 Alkalophilic methanogen and fast methane fermentation method |
| 09/01/1992 | US5143619 Separate activated sludge treatment, biodegradation, adsorption of organic halogens, circulation; water pollution control |
| 09/01/1992 | US5143618 Process for the treatment of organic wastewater |
| 09/01/1992 | US5143606 Arrangement for cleaning contaminated ground water |
| 09/01/1992 | CA1307059C Method of treating waste water and equipment therefor |
| 08/27/1992 | DE4105987A1 In-situ treatment of contaminated ground water - by forming slit shaped zones free from solids and treating water flowing through zones |
| 08/27/1992 | DE4102781A1 Converting small sewage treatment units to fixed bed process - by diverting biomass recirculation pipe to pre-clarification tank, extending aeration below fixed bed installed in aeration chamber |
| 08/26/1992 | WO1992014544A1 Ionotropic gel lacking a gelling ionic entity, process for the preparation of such a gel and use thereof especially in a process for producing a sparkling wine |
| 08/26/1992 | CA2081314A1 Ionotropic gel lacking a gelling ionic entity, process for the preparation of such a gel and use thereof especially in a process for producing a sparkling wine |
| 08/25/1992 | US5141653 Apparatus and method for treating a fluid |
| 08/25/1992 | US5141646 Process for sludge and/or organic waste reduction |
| 08/25/1992 | US5140855 Monitoring tank modules and array for use with biological sensors |
| 08/20/1992 | WO1992013960A1 Solid state culture of white rot fungi |
| 08/20/1992 | WO1992013953A1 Microbial transformation of recalcitrant pcb compounds |
| 08/20/1992 | WO1992013807A1 Composition and methods for removing or preventing biofilm |
| 08/20/1992 | WO1992013446A1 Water treatment unit in a fish pond for the intensive raising of fish |
| 08/20/1992 | DE4104756A1 Purificn. of water contg. chlorinated or halogenated hydrocarbon(s) - comprises extn. of hydrocarbon(s) by bubbling air through water and air is then purified using a biological treatment procedure |
| 08/20/1992 | DE4104287A1 Long-plate liq. aerator - comprises vessel and aeration plate rounded at narrow ends, seal resting on shoulder near rim of vessel and surface of plate is not obstructed |
| 08/20/1992 | CA2101057A1 Solid state culture of white rot fungi |
| 08/19/1992 | EP0499502A1 Process for controlling an apparatus for waste water purification |
| 08/19/1992 | EP0499302A1 Method and device for the determination of aerobic biodegradability |
| 08/19/1992 | CN2113271U Water turbine type adjustable distribution device |
| 08/18/1992 | US5139682 Absorption of impurities onto zeolites, then incubation of zeolites in bacterial cultures for biodegradation of impurities |
| 08/18/1992 | US5139657 Multiple-gas-phase settling tank |
| 08/18/1992 | CA1306433C Microorganisms and processes for degrading plant cell walls and halogenated hydrocarbons |
| 08/13/1992 | DE4104094A1 Procedure and device for pre-clearing waste liq. such as pig slurry - after removal of coarse solid material, water undergoes ozonisation and electrolysis in prepn. for biological treatment |
| 08/13/1992 | CA2041769A1 Artificial open water structures |
| 08/12/1992 | EP0498750A1 Plant for mixing two fluid phases by mechanical stirring, particularly for water treating by transfer of oxidizing gas and use of the same |
| 08/12/1992 | EP0498397A1 Water treatment system in a fish tank for intensive fish farming |
| 08/12/1992 | EP0498337A1 Process for liquid manure disposal |
| 08/12/1992 | CN2112631U Float biochemical ball |
| 08/12/1992 | CN1017795B Carriers used as biology growing surface |
| 08/12/1992 | CA2060960A1 Process for the control of a waste water treatment device |
| 08/11/1992 | US5137636 Process for the biological purification of waste water |
| 08/11/1992 | US5137625 Aquatic plant/microbial water purification system |
| 08/11/1992 | US5137608 Electrochemical decontamination of soils or slurries |
| 08/06/1992 | WO1992013130A1 Method for avoiding pitch troubles by use of thermostable lipase |
| 08/06/1992 | WO1992012938A1 Waste handling method |
| 08/06/1992 | WO1992012936A1 Waste water biological treatment device |
| 08/06/1992 | WO1992012932A1 Process and container for waste water purification |
| 08/06/1992 | WO1992012930A1 A sewage well or a small sewage purification plant |
| 08/06/1992 | DE4103246A1 Anaerobic purificn. of waste water in bio-gas reactor - involves flowing water vertically in lower part of reactor with microorganism support in upper part |
| 08/06/1992 | DE4103126A1 Diffuser for introducing or removing gas in rivers, lakes, etc. - in which gas is diffused through silicon@ rubber hose which is woven into fabric in which it acts as weft or warp |
| 08/06/1992 | CA2100087A1 Waste handling method |
| 08/05/1992 | EP0497419A1 Improved process for water purification |
| 08/05/1992 | EP0497414A1 Method and device for determining in an accelerated manner the anaerobic biodegradability of a product |
| 08/05/1992 | EP0497114A1 Process for purifying waste water containing phosphates and nitrogen compounds |
| 08/05/1992 | EP0448613B1 Process for the continuous monitoring of waste water |
| 08/05/1992 | EP0357753B1 Process and device for biological purification of water contaminated with nitrogen and phosphor compounds and organic carbon |
| 08/05/1992 | CA2060089A1 Installation for the mixing of two fluid phases by mechanical stirring, notably for the treatment of water by transfer of oxidizing gas, and use of such an installation |
| 08/01/1992 | WO1992013806A1 Improvements in fermentation apparatus |
| 08/01/1992 | CA2060479A1 Cover structure for a fermentation container |
| 08/01/1992 | CA2060365A1 Process for water purification |
| 07/31/1992 | CA2060252A1 Garbage treatment equipment |
| 07/31/1992 | CA2060251A1 Waste water treatment equipment |
| 07/30/1992 | DE4120143C1 Biologically treating organically contaminated liq. - by feeding from pipes at vessel base up through central pipe into chambers contg. many pivoting plates |
| 07/29/1992 | EP0496099A2 Flotation device |
| 07/29/1992 | CN2111288U Aeration and precipitating integrated water purifying device |
| 07/28/1992 | US5134078 Withdrawal of ground water from soil, anaerobic, then aerobic biodegradation, slow filtration, returning it to flush the soil |
| 07/28/1992 | US5133876 Method and apparatus for aerating wastewater using sequential aeration of different zones |
| 07/28/1992 | US5133875 Saponification, acidification, basification |
| 07/28/1992 | US5133862 Flexible membrane diffuser |
| 07/23/1992 | WO1992012248A1 Biological remediation of creosote and similarly-contaminated sites |
| 07/23/1992 | DE4101336A1 Inactivation of bactericidal sanitary chemical contg. quat. ammonium cpd. - by addn. of anionic cpd. before release into biological sewage treatment plant |
| 07/22/1992 | CN2110634U High-efficient oxygen-mixed reactor |