| Patents for C02F 3 - Biological treatment of water, waste water, or sewage (46,453) |
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| 09/17/1997 | EP0743926B1 Water treatment method and apparatus |
| 09/17/1997 | EP0696260B1 Microbial degradation of chemical pollutants |
| 09/17/1997 | EP0632790B1 Method for activation of a digesting agent |
| 09/17/1997 | CN1159429A Sewage treating method |
| 09/16/1997 | US5667689 Method of augmenting flow in a wastewater treatment plant |
| 09/16/1997 | US5667688 Process for the purification of polluted water |
| 09/16/1997 | US5667673 Microbial mediated water treatment |
| 09/16/1997 | CA2073305C Oxidation ditch velocity control system |
| 09/12/1997 | WO1997032969A1 Method of composite fermentation of aerobic and anaerobic microorganisms |
| 09/12/1997 | WO1997032960A1 Enzymatic detergent composition and method for degrading and removing bacterial cellulose |
| 09/12/1997 | WO1997032820A1 System for removing nutrients from wastewater |
| 09/12/1997 | WO1997032819A1 Capillary fixed-bed reactor for treating a liquid |
| 09/12/1997 | WO1997032818A1 Apparatus and method for biological purification of wastes |
| 09/12/1997 | CA2248763A1 Apparatus and method for biological purification of wastes |
| 09/11/1997 | DE19608474A1 Treatment vessel for liquid effluents |
| 09/10/1997 | EP0793623A1 Multi-channel denitrification system |
| 09/10/1997 | EP0793622A1 A carrier medium to retain a biofilm for cleaning waste water and a process for the production of this carrier medium |
| 09/10/1997 | EP0644858B1 System and process for purifying waste water which contains nitrogenous compounds |
| 09/10/1997 | EP0644857B1 Method for treating water |
| 09/10/1997 | EP0589896B1 Blowing a gas into a granular filter bed |
| 09/10/1997 | EP0587807B1 A process for de-pollution by means of biodegradation and means for performing the same |
| 09/10/1997 | CN1158825A Alternative integral biological treater and treatment method |
| 09/09/1997 | US5665597 Pseudomonas alcaligenes, bioremediation |
| 09/09/1997 | US5665236 Purification of liquids |
| 09/04/1997 | WO1997031682A1 Process for microbial decomposition of harmful substances in media charged with harmful substances, and micro-organisms suitable for this purpose |
| 09/03/1997 | EP0792196A1 Method of decontaminating contaminated material and devices therefor |
| 09/03/1997 | EP0633866B1 Method and apparatus for batchwise biological and chemical purification of soil water |
| 08/28/1997 | WO1997030758A1 BACTERIUM SPECIES COMAMONAS ACIDOVORANS P4a AND PROCESS FOR THE MICROBIAL DECONTAMINATION OF MATERIALS POLLUTED WITH PHENOXYACETIC ACID HERBICIDES |
| 08/28/1997 | DE19604689A1 Verfahren zum Behandeln einer sauren Lösung A method for treating an acidic solution |
| 08/28/1997 | DE19603959C1 Domestic water effluent treatment process |
| 08/27/1997 | EP0791561A2 Structure for multistage biological purification of waste water |
| 08/27/1997 | EP0790960A1 Wastewater treatment method and plant |
| 08/27/1997 | EP0790851A1 Activated sludge degassing process and device |
| 08/27/1997 | EP0637264B1 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 |
| 08/26/1997 | US5660766 Aerator |
| 08/26/1997 | US5660732 Method of separating oleophilic-hydrophobic material from wash water |
| 08/26/1997 | US5660730 Inertization of liquid waste, mud and solid waste containing heavy metals by sulphate-reducing bacteria |
| 08/26/1997 | US5660724 Multi-pressure head tank for use with vertical shaft bioreactors |
| 08/26/1997 | US5660142 Closed loop; settling tanks |
| 08/21/1997 | WO1997029998A1 Reactor for biologically removing organic pollutants from water |
| 08/21/1997 | WO1997029832A1 Odor control system |
| 08/21/1997 | DE19606004A1 Purifying river water to give bathing quality water |
| 08/21/1997 | DE19605624A1 Caustic floor cleaning wastes containing tensides pre-cleaned by centrifuge |
| 08/21/1997 | DE19602217C1 Process for treatment of waste water with denitrification |
| 08/20/1997 | EP0789672A1 Apparatus for producing air saturated water |
| 08/20/1997 | EP0691938B1 Silage-microbial mat system and method |
| 08/19/1997 | US5658795 Method for biodegradation of polluting substance |
| 08/19/1997 | US5658458 Apparatus for removing suspended inert solids from a waste stream |
| 08/14/1997 | WO1997029056A1 Process and plant for sewage treatment |
| 08/14/1997 | WO1997029055A1 Process for the treatment of water containing heavy metal ions |
| 08/14/1997 | WO1997029054A1 Method of treating an acid solution |
| 08/14/1997 | WO1997029052A1 Process and apparatus for effecting a biological aerobic pretreatment of dairy industry effluent |
| 08/14/1997 | WO1997029051A1 Construction of material for carrier structure for group of effective microorganisms and group of products |
| 08/14/1997 | CA2248358A1 Process and plant for sewage treatment |
| 08/13/1997 | EP0789001A2 Apparatus for the biological purification of water |
| 08/13/1997 | EP0788394A1 Process for the treatment of contaminated material |
| 08/13/1997 | EP0734288B1 Gas-introduction device |
| 08/13/1997 | EP0732964B1 Process and agent for the decontamination by means of micro-organisms |
| 08/13/1997 | EP0620756B1 Gas particle formation |
| 08/13/1997 | EP0528901B1 Improved method for solute transfer between solid and liquid phases |
| 08/13/1997 | CN2259400Y Vertical limited aeration sewage treatment equipment |
| 08/13/1997 | CN2259399Y Cage type elastic stereoscopic suspension packing |
| 08/13/1997 | CN1156694A Comprehensive draining treating technique for black liquor and midcourse water from caustic soda process straw pulp paper mill |
| 08/13/1997 | CN1156693A Circulation filter for bathing water |
| 08/12/1997 | US5656169 Biodegradation process for de-toxifying liquid streams |
| 08/12/1997 | US5656155 Thermophilic aerobic waste treatment system |
| 08/07/1997 | WO1997028257A1 Bacterial polyphenol oxidase from bacillus for use in oxidation of colored substances |
| 08/07/1997 | WO1997028101A1 Method for treating aqueous liquid effluents containing organic and inorganic materials to enable recycling thereof |
| 08/07/1997 | WO1997028094A1 Process for the thoroughgoing aerobic biological purification of waste water |
| 08/07/1997 | WO1997028093A1 Small-scale biological sewage treatment plant |
| 08/07/1997 | WO1997028092A1 Composition and method for the clarification of swimming pool and spa water |
| 08/07/1997 | WO1997027941A1 Composition for accelerating the decomposition of hydrocarbons |
| 08/07/1997 | DE19603690A1 Verfahren zur aeroben, weitergehenden biologischen Reinigung von Abwässern A method for aerobic, further biological purification of waste waters |
| 08/07/1997 | CA2254711A1 Method for treating aqueous liquid effluents containing organic and inorganic materials to enable recycling thereof |
| 08/06/1997 | EP0787108A1 Process and circulation tank or channel for long-term aeration of waste water cleaned in an activated sludge process |
| 08/06/1997 | EP0750590A4 Waste treatment plant and process |
| 08/06/1997 | EP0738238B1 Process for the wet-oxidising treatment of organic pollutants in waste water |
| 08/06/1997 | EP0610176B1 Degradation of ferric chelates by a pure culture of agrobacterium sp. |
| 08/06/1997 | CN1156126A Treating method for black liquor of pape-making |
| 08/05/1997 | US5654192 Composition containing a surface active compound and glycolipids and decontamination process for a porous medium polluted by hydrocarbons |
| 08/05/1997 | US5653883 Continuous processing |
| 08/05/1997 | US5653675 Applying a substance to eliminate microorganisms which eat pollutant-degrading microorganisms |
| 08/05/1997 | US5653255 Dosing device for a septic treatment system |
| 07/31/1997 | WO1997027146A1 Oxygenating apparatus, method for oxygenating water therewith, and applications thereof |
| 07/31/1997 | DE19613294C1 Small sewage processing plant |
| 07/31/1997 | DE19602947A1 Removal of organic contaminants, e.g. pesticides from effluent |
| 07/30/1997 | EP0786435A2 Process and device for waste water treatment |
| 07/30/1997 | EP0785911A1 Biological waste fluid cleaner |
| 07/30/1997 | EP0696261B1 Method of treating waste water containing organic and inorganic compounds arising from the manufacture of epichlorohydrin |
| 07/30/1997 | EP0611364B1 Method and apparatus for removing manganese from water |
| 07/30/1997 | CN1155849A Zero waste effluent water desalination system |
| 07/30/1997 | CN1155521A Method for treating exhaust gases and foul water |
| 07/30/1997 | CN1155520A Granular carrier for treating sewage or waste water, method for producing same and apparatus for treating sewage or waste water by using granular carriers |
| 07/29/1997 | US5651939 Perforate baffle |
| 07/29/1997 | US5651892 Biodegradeable effluent nutrient removal |
| 07/29/1997 | US5651891 Wastewater treatment process |
| 07/29/1997 | US5651890 Use of propane as stripper gas in anaerobic digestion of wastewaters |
| 07/29/1997 | US5651889 Sludge treatment membrane apparatus |
| 07/24/1997 | WO1997026525A1 Method for monitoring biological activity in fluids |
| 07/24/1997 | WO1997026218A1 Wastewater gas reduction method |