| Patents for C02F 3 - Biological treatment of water, waste water, or sewage (46,453) |
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| 07/14/1999 | EP0854843A4 Controlling wastewater treatment by monitoring oxygen utilisation rates |
| 07/14/1999 | CN2328655Y Purifying device for waste water |
| 07/14/1999 | CN1222490A Small-scale efficient sewage treatment installation |
| 07/13/1999 | US5922745 A synergistic microbiocide comprising a mixture of 5-chloro-2-methyl 4-isothiazolin-3-one and 2-methyl-4-isothiazolin-3-one treating industrial aqueous systems including cooling water systems, pulp and paper mill |
| 07/13/1999 | US5922204 Method and apparatus for bioremediation of mixed hazardous wastes |
| 07/08/1999 | WO1999033585A1 Method for treating a material contaminated by resistant polluting compounds |
| 07/08/1999 | DE19800335A1 Preparing dehydrated products especially food and pharmaceuticals, with reuse of waste water |
| 07/07/1999 | EP0927702A2 Composition, method and apparatus for safe disposal of oil contaminated filter media |
| 07/07/1999 | EP0837039B1 Construction of material for carrier structure for group of effective microorganisms and group of products |
| 07/07/1999 | EP0820335B1 Settling device for a fluid containing liquid, gas and particulate material, as well as a cleaning device provided herewith and a method for cleaning waste water |
| 07/07/1999 | EP0750591B1 Use of biofilm carrier for water and waste water purification |
| 07/07/1999 | EP0700476B1 Improvements in bioremediation of hydrocarbon contaminated soils and water |
| 07/07/1999 | EP0579603B1 Treatment of wastes |
| 07/07/1999 | CN1221791A Solistate photosynthetic germ |
| 07/06/1999 | US5919367 Biological-abiotic waste treatment |
| 07/06/1999 | US5919366 Effluent treatment system |
| 07/01/1999 | WO1999032636A1 Biodegradation of explosives |
| 07/01/1999 | WO1999032408A1 Apparatus and process for water treatment |
| 07/01/1999 | WO1999032406A2 Improved effluent treatment system |
| 07/01/1999 | DE19757022A1 Sewage basin gassing system useful for distribution of gas in sewage purification basin |
| 07/01/1999 | DE19753707A1 Microorganism growth body useful for biological cleaning in sewage purification |
| 07/01/1999 | DE19752542A1 Verfahren zur Reduzierung der Konzentration von Inhaltsstoffen in einem Gas und in einer Flüssigkeit und Vorrichtung zur Durchführung dieses Verfahrens A process for reducing the concentration of constituents in a gas and a liquid and a device for carrying out this method |
| 06/30/1999 | EP0925258A1 Method for purifying carbon-containing pollution and denitrifying waste water in oxygenic medium |
| 06/30/1999 | CN2326595Y Solid net-shape microorganism carrier filler |
| 06/30/1999 | CN1220975A Sewage treatment device |
| 06/30/1999 | CN1220974A Sewage treatment device |
| 06/30/1999 | CN1220972A Treatment method for waste water |
| 06/29/1999 | US5917117 Inducing hyperaccumulation of metals in plant shoots |
| 06/29/1999 | US5916491 Gas-liquid vortex mixer and method |
| 06/29/1999 | US5916444 Promoting growth of biomass or algae until the nitrates, the main nutrient for algae have been depleted to an acceptable level and removed from the water without oxidizing or destroying the algae; water treatment of swimming pools |
| 06/24/1999 | WO1999031020A1 Slime control in industrial waters |
| 06/24/1999 | WO1999031019A1 Device and method for creating spherical particles of uniform size |
| 06/24/1999 | WO1999030812A1 Device and method for aeration of fluids |
| 06/24/1999 | DE19755527A1 Waste water treated by sedimentation and filtration using aquatic plants |
| 06/24/1999 | CA2315048A1 Device and method for creating spherical particles of uniform size |
| 06/24/1999 | CA2314919A1 Device and method for aeration of fluids |
| 06/23/1999 | EP0924184A2 A method for treating an effluent containing sorbic acid and/or a salt thereof and an effluent disposal device |
| 06/23/1999 | EP0924168A1 Method and apparatus for sludge reduction in an aerobic waste water treatment system |
| 06/23/1999 | EP0923505A1 Method and equipment for off-shore treatment of communal sewage water |
| 06/23/1999 | CN2325380Y Dynamic aeration equipment |
| 06/23/1999 | CN2325379Y Biochemical rotating drum type wastewater treatment equipment having packings |
| 06/23/1999 | CN1220243A Method for integral treatment of domestic and chemical industrial sewage |
| 06/17/1999 | WO1999029633A1 Method for liberating, in an aqueous phase, substance(s) which is/are impossible, or difficult, to biodegrade, from a compounded material which is not soluble in water |
| 06/17/1999 | DE19755447A1 Waste water treatment basin having spiral-walled channel |
| 06/17/1999 | CA2256218A1 Composition, method and apparatus for safe disposal of oil contaminated filter media |
| 06/16/1999 | EP0921722A1 Automated closed recirculating aquaculture filtration system |
| 06/16/1999 | EP0527959B1 Biological system for degrading nitroaromatics in water and soils |
| 06/16/1999 | CN2324149Y 沼气自动提升循环厌氧塔 Anaerobic methane cycle automatically upgrade tower |
| 06/16/1999 | CN1219920A Thermophilic methanotrophs for high-temp. oxidations |
| 06/15/1999 | US5911877 Device for maintaining bacterial levels within an organic waste collection container |
| 06/15/1999 | CA2056797C Biological reduction and oxidation reactor, filtration and washing processes used therein |
| 06/10/1999 | WO1999028514A1 Bioremediation of waste streams containing dissolved metals such as neptunium by two-stage bio-reduction/extraction |
| 06/10/1999 | WO1999028245A2 An apparatus for applying alternating anaerobic contact processing for the treatment of wastewater |
| 06/10/1999 | WO1999028244A1 Curtain assembly for waste treatment |
| 06/10/1999 | WO1999028243A1 ALKALINITY AND pH CONTROL IN BIOLOGICAL PROCESSES |
| 06/10/1999 | WO1999028018A1 Method and device for reducing the concentration of ingredients in a gas and in a liquid |
| 06/10/1999 | DE19851141A1 Treatment of biological waste or contaminated soil |
| 06/09/1999 | EP0920493A1 Biodegradation of explosives |
| 06/09/1999 | EP0866774B1 Single-tank sewage treatment plant |
| 06/09/1999 | EP0858357B1 Methods for decomposing quinolones and naphthyridones |
| 06/09/1999 | CN1219158A Oxygenating apparatus, method for oxygenating water therewith and applications thereof |
| 06/09/1999 | CN1218772A Technology for purifying waste water by using flower plants |
| 06/08/1999 | US5910511 Alternative to aspirin which has lesser undesirable side effects |
| 06/08/1999 | US5910249 Screening raw sewage; filtering the screened effluent through a microfiltration membrane for removal of suspended solids without an intermediate long term biological treatment stage; efficiency |
| 06/08/1999 | US5910248 Water filtration |
| 06/08/1999 | US5910245 In situ anaerobic and aerobic treatment of hydrocarbon contaminated ground water |
| 06/03/1999 | WO1999026882A2 Method and device for purifying waste water |
| 06/03/1999 | WO1999026736A1 Bacterium capable of biodegradation of wastes |
| 06/03/1999 | CA2255216A1 Water dissolvable bioremediation device and the method of use |
| 06/02/1999 | EP0919524A1 Savety valve for aerators |
| 06/02/1999 | CN1218421A Purification of gases containing hydrogen sulphide |
| 06/01/1999 | US5908555 Removing nitrate from water is provided comprising a closed tank having an inlet port and an outlet port, and containing therein particulate matter which forms a fixed porous bed on which microorganisms form a biofilm. |
| 06/01/1999 | US5908554 Method and plant for the purification of waste water by the activated sludge method |
| 06/01/1999 | US5908550 Water reclamation system for a vehicle wash system |
| 06/01/1999 | CA2096660C Process for the removal of sulphur compounds from gases |
| 06/01/1999 | CA2068283C Treatment of contaminated agricultural run-off |
| 05/27/1999 | WO1999025657A2 Well-mixed flow bioreactor for aerobic treatment of aqueous wastes at high organic and solids loadings |
| 05/27/1999 | CA2315838A1 Well-mixed flow bioreactor for aerobic treatment of aqueous wastes at high organic and solids loadings |
| 05/27/1999 | CA2222394A1 A mixing and aeration unit |
| 05/26/1999 | EP0917522A1 Biodegradation process for de-toxifying liquid streams |
| 05/26/1999 | EP0917521A1 Method for in-situ immobilisation of heavy metals and/or sulphate in water-containing zones |
| 05/25/1999 | US5906931 Method and device for digestion of sludge |
| 05/25/1999 | US5906774 Submerged diffuser lifting arrangement |
| 05/25/1999 | US5906746 Method for the control of biodegradation |
| 05/25/1999 | US5906745 Jetting at spaced intervals fine bubbles of oxygen-containing gas upwardly into polluted water stream flowing through container filled with fluid permeable purifying material to create aerobic and nonaerobic treatment zones |
| 05/20/1999 | WO1999024370A1 Method for the control of biodegradation |
| 05/20/1999 | WO1999024367A1 Polylactate release compounds and methods of using same |
| 05/20/1999 | WO1999024140A1 Filter bed differential pressure monitoring system |
| 05/19/1999 | CN2319400Y Ribbon type water treatment filler |
| 05/18/1999 | US5905037 Liquid septic tank treatment composition |
| 05/18/1999 | US5904850 Multicompartment device for settling particles |
| 05/18/1999 | US5904847 Septic tank waste water filter |
| 05/18/1999 | CA2221476A1 Method and system for bioremediation of hydrocarbon contaminated water |
| 05/18/1999 | CA2221407A1 Aerobic bioreactor for treating aqueous wastes at high organic and solids loadings |
| 05/14/1999 | WO1999023039A2 Method for treating process waste waters highly charged with ammonium in waste water systems |
| 05/14/1999 | WO1999023038A1 Method for denitrifying waste water |
| 05/14/1999 | WO1999023036A1 Method for removing hydrophobic impurities using cleavable nonionic surfactants |
| 05/14/1999 | WO1999022885A1 Method of using pelargonium sp. as hyperaccumulators for remediating contaminated soil |
| 05/14/1999 | WO1999022581A1 Installation for the purification of liquid manures and the like |
| 05/14/1999 | CA2308445A1 Method of using pelargonium sp. as hyperaccumulators for remediating contaminated soil |