| Patents for C02F 3 - Biological treatment of water, waste water, or sewage (46,453) |
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| 03/23/1999 | US5885467 Flowing fluid gradually down along a series of trays within oxygen-pressurized mixing vessel |
| 03/23/1999 | US5885460 Anaerobic migrating blanket reactor |
| 03/23/1999 | US5885459 Process for purifying and reusing surfactant-containing waste waters |
| 03/23/1999 | US5885452 Effluent filtering apparatus |
| 03/23/1999 | US5885448 Thermophilic aerobic waste treatment process |
| 03/23/1999 | CA2033000C Sewage sludge treatment with gas injection |
| 03/19/1999 | CA2247779A1 Process for biodegradation of a xenobiotic |
| 03/17/1999 | EP0901987A2 Method for improving water quality of lake or the like and water quality improving shading means used therefor |
| 03/17/1999 | EP0876303A4 Composition for the treatment of municipal and industrial waste-water |
| 03/17/1999 | EP0807089B1 Centrifuge for thickening waste water sludge |
| 03/17/1999 | EP0669851B1 Frameless array of hollow fiber membranes and method of maintaining clean fiber surfaces while filtering a substrate to withdraw a permeate |
| 03/17/1999 | CN1210753A Composite spiral filling |
| 03/16/1999 | US5882510 Contact filter block of joined tube sections |
| 03/10/1999 | EP0900766A1 Fluid purifying apparatus |
| 03/10/1999 | EP0900178A1 Process and apparatus for the treatment of flowable waste |
| 03/10/1999 | EP0649338B1 Device for introducing a gas into a liquid |
| 03/10/1999 | CN2310067Y Self-cleaning domestic sewage purifier |
| 03/10/1999 | CN2310066Y Hollow fibre membrane biological reaction sewage treatment apparatus |
| 03/10/1999 | CN1210504A Process and plant for sewage treatment |
| 03/10/1999 | CN1210503A Treatment of water containing heavy metal ions |
| 03/09/1999 | US5879928 Mixture of enzymes from saccharomyces fermentation supernatant, imidazolidinyl urea, nonionic surfactant, diazolidinyl urea, sodium benzoate; enhances degradation, increases dissolved oxygen, deodorizes |
| 03/09/1999 | US5879567 Method of purifying aquarium water using a pressurized, tank mounted, fluidized bed filter |
| 03/09/1999 | US5879555 Electrochemical treatment of materials |
| 03/09/1999 | US5879550 Clip for the support of a clarifier and a dropline in an aerated wastewater treatment tank |
| 03/04/1999 | WO1999010739A1 Methanation activity measuring instrument |
| 03/04/1999 | DE19802957C1 Water de-nitrification process has two single batch reactors |
| 03/04/1999 | DE19738033A1 Small-scale aerobic water treatment plant |
| 03/03/1999 | EP0899241A1 Waste water treatment process and system for biological phosphorus elimination |
| 03/03/1999 | EP0899237A2 Apparatus for water treatment |
| 03/03/1999 | EP0836584B1 Microbiological degradation of alkylene amine acetates |
| 03/03/1999 | EP0487705B2 Process for the removal of hydrogensulphide (h2s) from biogas |
| 03/03/1999 | CN2309334Y Anaerobic reaction pond |
| 03/03/1999 | CN1209839A Bacterial polyphenol oxidase from bacillus for use in oxidation of colored substance |
| 03/03/1999 | CN1209791A Small-scale biological sewage treatment plant |
| 03/02/1999 | US5877113 To control organic pollutants and/or algae therein. |
| 03/02/1999 | US5876990 Water dispersable oxygen inducing compound in carrier, and oxygen releasing compound which reacts with oxygen inducer to release nascent oxygen; for oxygenation of aqueous environments, prevention of spoilage |
| 03/02/1999 | US5876606 Treatment of contaminated water |
| 03/02/1999 | US5876604 Amorphous copolymer of perfluoro-2,2-dimethyl-1,3-dioxole |
| 03/02/1999 | US5876603 Method of biologically removing nitrogen and system therefor |
| 03/02/1999 | US5876594 Turbo oxidation system,--TOS, for wet combustion of COD-containing liquids and for COD-reduction by enzymes |
| 03/02/1999 | US5876484 Method for removing soluble metals from an aqueous phase |
| 02/28/1999 | CA2245719A1 Anoxic biotreatment cell |
| 02/25/1999 | WO1999008782A1 Process for preparation of vesicles |
| 02/25/1999 | WO1999008780A1 Improved mixing and aerating apparatus |
| 02/25/1999 | DE19737452A1 Microbiological recovery of dissolved copper@ as pure metal |
| 02/25/1999 | DE19736531A1 Waste water biological treatment plant has cutting wheel pump on basin floor |
| 02/25/1999 | DE19734154A1 Process to choose treatment for municipal or industrial waste |
| 02/25/1999 | DE19580599C1 Purifying dairy waste water |
| 02/24/1999 | EP0897374A1 Apparatus and method for biological purification of wastes |
| 02/24/1999 | EP0836585B1 Treatment system for treating waste water |
| 02/24/1999 | EP0558568B1 A method for treating an organic substance |
| 02/24/1999 | CN2308595Y Sucking built-in film biological reactor |
| 02/23/1999 | US5874291 Degradation of environmental toxins by a filamentous bacterium |
| 02/23/1999 | US5874002 Enhanced oxygenation of sewage within multicompartment tank in which an inverted frustopyrimidal hopper defines aeration zones external to hopper and clarification zone internal to hopper whereby supplied air is compressed by incoming sewage |
| 02/23/1999 | CA2133154C Apparatus for aerating and/or anaerobically mixing liquids |
| 02/18/1999 | WO1999007643A1 Process and apparatus for decoloring liquids and water product thereof |
| 02/18/1999 | WO1999007460A1 Gas-liquid venturi mixer |
| 02/18/1999 | WO1998051139A3 Method for reducing moisture content |
| 02/17/1999 | EP0897000A1 Microorganism carrier and process for production thereof |
| 02/17/1999 | EP0794927B1 Method and apparatus for sewage water treatment |
| 02/17/1999 | EP0773908B1 Method and device for purifying waste water, in particular for fully biological domestic sewage treatment systems |
| 02/17/1999 | CN2307785Y Shear-type bladed-surface aeration turn table |
| 02/17/1999 | CN1208025A Continuous sewage treating process and system through intermittent aeration and by active sludge |
| 02/17/1999 | CN1208024A Preparation and use of fast sewer dredging powder |
| 02/16/1999 | US5871647 Wastewater treatment unit and method for treating wastewater |
| 02/16/1999 | US5871640 Filter and housing |
| 02/11/1999 | WO1999006328A1 Process for treatment of sulphates containing water |
| 02/11/1999 | WO1999006327A1 Method and device for purifying waste water comprising an additional sludge treatment by ozonation |
| 02/11/1999 | WO1999006326A1 Method for inhibiting biogenic sulfide generation |
| 02/11/1999 | DE19734389A1 Utilisation of waste liquor by converting high carbohydrate content to useful by-product |
| 02/10/1999 | EP0642471B1 Method for fermentation of especially highly viscous substrates and means for blending air into the substrate |
| 02/10/1999 | CN2306990Y Self-deformation elastic three-dimensional filler |
| 02/10/1999 | CN1207370A Oxidation tube |
| 02/10/1999 | CN1207368A Water treatment apparatus using plasma reactor and method thereof |
| 02/09/1999 | US5868972 Aerating device |
| 02/09/1999 | US5868971 Device for introducing gases into liquids in fine bubbles |
| 02/09/1999 | US5868934 Method and apparatus for organic wastewater treatment capable of preventing decrease in permeation efficiency of submerged membrane without dilution |
| 02/09/1999 | US5868926 Receptacle is located above a rotatable water absorbing body, so that water flows down onto one side of the rotating substrate, causing rotation, exposing nitrifying bacteria to air/water alternatively; detoxification of fish holding tanks |
| 02/09/1999 | US5868172 Flow augmenting device for a wastewater treatment plant |
| 02/04/1999 | WO1999005392A1 Method and apparatus for removing oil from oil-contaminated particulate material as e.g. waste drilling mud |
| 02/04/1999 | DE19732717A1 Arrangement for aeration of activation basins |
| 02/04/1999 | DE19732416A1 Sub-soil barrier gate for treating ground water |
| 02/04/1999 | CA2212304A1 Treatment of animal waste |
| 02/03/1999 | EP0784598A4 Treatment of nutrient-rich water |
| 02/03/1999 | EP0748298B1 Adsorbent biocatalyst porous beads |
| 02/02/1999 | US5866006 Coated single particles and their use in fluid bed chromatography |
| 02/02/1999 | US5866003 Pollution control using microorganisms |
| 02/02/1999 | US5866002 Apparatus for activation of a digesting agent and method of its use |
| 01/28/1999 | WO1999003785A1 Device for treatment and removal of aqueous liquids by controlled atmospheric action |
| 01/28/1999 | WO1999003569A1 Device and process for liquid treatment |
| 01/28/1999 | DE19732034A1 Retro-fit modernisation process for small-scale sewage treatment plant |
| 01/27/1999 | EP0893413A1 Process and device for the biological treatment of liquids, in particular for the complete biological clarification of waste water |
| 01/27/1999 | EP0892764A2 Processing of sewage sludge into humus |
| 01/27/1999 | EP0642472B1 Process for removing sulphur compounds from water |
| 01/27/1999 | CN1205988A Light anticorrosive aeration turn plate and its manufacture |
| 01/26/1999 | US5863750 Biodegradation by contacting with a pure culture of a multiply induced microorganism |
| 01/26/1999 | US5863472 Air-diffusion apparatus |
| 01/26/1999 | US5863435 Biological treatment of wastewater |
| 01/26/1999 | US5863434 Psychrophilic anaerobic treatment of waste in a sequencing semibatch/batch bioreactor |
| 01/26/1999 | US5863433 Reciprocating subsurface-flow constructed wetlands for improving wastewater treatment |