| Patents for C02F 9 - Multistep treatment of water, waste water or sewage (41,429) |
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| 01/14/1998 | EP0817678A1 Removal of lead from drinking water |
| 01/14/1998 | CN1169964A Process and system for sugar degradation biological dephosphorization and denitrogenation |
| 01/13/1998 | US5707532 Resulting from paper recycling, deinking, amino resin and polyamine from epichlorohydrin and dimethylamine |
| 01/13/1998 | US5707528 Water treatment by filtration, polishing, adsorption of organic compounds, treatment with ozone, decomposition of organic compounds, circulation of water |
| 01/13/1998 | US5707518 Refrigerator water filter |
| 01/13/1998 | US5707514 Water treating method and apparatus treating waste water by using ion exchange resin |
| 01/07/1998 | EP0724546B1 Processes for the treatment of acidic liquors and for the production of commercial products thereby |
| 01/06/1998 | US5705073 Papermaking |
| 01/06/1998 | US5705046 Reaction with limestone to form gypsum and coal fly ash, filtration, transferring the filtrate to electrodialyzer for ion exchanging with membranes |
| 01/02/1998 | DE19625346A1 Verfahren zur Wasseraufbereitung in einem geschlossenen Kreislauf mit Reaktor Water treatment process in a closed circuit with reactor |
| 12/31/1997 | WO1997049639A1 Process for water treatment in a closed circuit with a reactor |
| 12/31/1997 | WO1997049279A1 Automated closed recirculating aquaculture filtration system |
| 12/31/1997 | CN1168867A Group type integrated water purification equipment |
| 12/30/1997 | US5702614 Rotatable chamber containing treatment particles partially submerged in fluid reservoir, having openings at both ends so fluid to be treated can flow freely in and out |
| 12/30/1997 | US5702609 Water retrieval from aqueous mixture of organic phosphates |
| 12/30/1997 | US5702604 Water purification |
| 12/30/1997 | US5702594 Apparatus for treatment of waste water and/or exhaust gases containing fluorine and surface active agents |
| 12/30/1997 | US5702572 Method for treating exhaust gases and foul water |
| 12/30/1997 | CA2091315C Process and apparatus for the purification of water |
| 12/24/1997 | WO1997048647A1 Waste water treatment plant |
| 12/24/1997 | WO1997048421A2 Apparatus and methods for the disinfection of fluids |
| 12/24/1997 | CN2271173Y Tubular sewage treatment apparatus |
| 12/24/1997 | CN1168353A Metallic ion-linear condensed state magnetized mineral-dissolving water and its preparation method |
| 12/24/1997 | CA2258865A1 Apparatus and methods for the disinfection of fluids |
| 12/23/1997 | US5700371 Water treatment cartridge and base |
| 12/17/1997 | CN1167733A Method and apparatus for production of drink water and salt |
| 12/16/1997 | US5698107 Treatment for acid mine drainage |
| 12/16/1997 | US5698091 Pressed carbon block filter and source of radiant ultraviolet energy |
| 12/11/1997 | WO1997046331A1 Process and apparatus for the removal of aromatic amines from soil and water |
| 12/10/1997 | EP0811580A2 Method for removing heavy metal from sludge |
| 12/10/1997 | EP0633846B1 Method for automatic washing of vehicles |
| 12/10/1997 | CN1167090A Vertical retained aeration sewage treatment process and device |
| 12/09/1997 | US5695882 Reaction product of polyamine with short chain hydrocarbylsilane bonded to hydrated surface of extraction material |
| 12/09/1997 | US5695642 Method for purifying contaminated water |
| 12/07/1997 | CA2178377A1 Process and apparatus for the removal of aromatic amines from soil and water |
| 12/04/1997 | WO1997037941A3 Process for the biological purification of waste water |
| 12/03/1997 | EP0810183A1 Treatment process for acrylonitrile plant wastewater streams |
| 12/03/1997 | CN1166459A Direct use method of waste water as circular water |
| 11/26/1997 | EP0808179A1 Device and process for the sterilization of waste water |
| 11/26/1997 | CN2268701Y Sewage treating apparatus of building |
| 11/26/1997 | CN2268447Y Drinking water supplier with disinfector |
| 11/25/1997 | US5690827 Sewage treatment system using peat and a constructed wetland |
| 11/25/1997 | US5690817 Photographic effluent treatment apparatus |
| 11/20/1997 | WO1997043221A1 Process for treating the scrubbing water from the gas scrubbing process in an iron ore reduction plant |
| 11/20/1997 | WO1997043029A1 Method of reducing the number of pollutants in a gas flow and device for carrying out said method |
| 11/20/1997 | DE19717604A1 Verfahren und Vorrichtung zur Behandlung von Waschwasser bei der Gaswäsche von Prozeßgasen Method and apparatus for the treatment of wash water in gas scrubbing process gases |
| 11/20/1997 | DE19620006A1 Domestic waste water oxygenated using helical clay surface treatment assembly |
| 11/20/1997 | CA2255028A1 Method of reducing the number of pollutants in a gas flow and device for carrying out said method |
| 11/20/1997 | CA2249006A1 Process for treating the scrubbing water from the gas scrubbing process in an iron ore reduction plant |
| 11/19/1997 | EP0807607A1 Process for working up spent photographic processing baths |
| 11/19/1997 | EP0807606A1 Process for working up of photographic baths resulting from colour processing |
| 11/19/1997 | CN2268028Y Electric-heating type filtering water purifying machine |
| 11/18/1997 | US5688076 High-vacuum groundwater and soil remediation system and related method and apparatus |
| 11/18/1997 | CA2034746C Method of neutralizing hazardous products and composition therefor |
| 11/13/1997 | WO1997041960A1 Drinking water filtration system |
| 11/13/1997 | WO1997041949A1 Mobile water purification unit with modular dechlorination input stage |
| 11/13/1997 | DE19622159A1 Plant for passive treatment of contaminated ground water |
| 11/13/1997 | DE19620310A1 Verfahren zum Behandeln von Waschwasser aus der Gaswäsche einer Eisenerzreduktionsanlage A method of treating wash water from the gas scrubbing an iron ore reduction plant |
| 11/13/1997 | DE19618319A1 Drinking water dispenser has taste-improving water treatment process |
| 11/12/1997 | CN2267244Y Domestic water treatment apparatus by water circulation purification method |
| 11/11/1997 | US5685993 Recovering iron |
| 11/11/1997 | US5685980 Miniaturized handheld desalination field unit |
| 11/06/1997 | WO1997035810A3 A method of removing iron compounds and chromium compounds from an aqueous electrolytic solution as well as the use of this method in electrochemical machining |
| 11/06/1997 | DE19617714A1 Water treatment plant |
| 11/05/1997 | EP0693041B1 Process and device for processing and/or dewatering sludge liquor from waste water tanks, in particular small sewerage purification plants |
| 11/05/1997 | EP0639162B1 Process and device for destroying free and complex cyanides, aox, mineral oil, complexing agents, csb, nitrite, chromate, and for separating metals from waste waters |
| 11/05/1997 | CN2266595Y Apparatus for purifying and cleaning running water |
| 11/05/1997 | CN1163706A Process for extracting thallus protein from waste liquid of glutamic acid production |
| 11/04/1997 | US5683583 Sewage dewatering equipment |
| 11/04/1997 | US5683576 Water ozonation treatment apparatus |
| 10/30/1997 | WO1997039983A1 Method and apparatus for removing metal ions and/or complexes containing metal ions from a solution |
| 10/30/1997 | DE19713977A1 Electrodialysis process for removing ionic impurities from water |
| 10/29/1997 | EP0803476A1 Survival water supplier |
| 10/29/1997 | CN2265978Y High-efficiency sterilization purified water filter |
| 10/29/1997 | CN2265977Y Water purifying storage device |
| 10/29/1997 | CN2265976Y Magnetized water producer |
| 10/28/1997 | US5681480 Dewatering of aqueous suspensions |
| 10/28/1997 | US5681476 Process for the purification of groundwater |
| 10/22/1997 | EP0802165A1 Method of treating waste water to remove harmful ion by coagulating sedimentation |
| 10/22/1997 | CN2265370Y Domestic water-purifier with noval cleaning device |
| 10/22/1997 | CN1162821A Treating apparatus for radioactive waste liquid |
| 10/22/1997 | CN1162573A Pollutionless water treatment method with high availability of water and continous operation |
| 10/21/1997 | US5679261 Using diallyldimethylammonium chloride cationic polymer having vinyl alkoxysilane component as coagulant |
| 10/21/1997 | US5679259 Method for recovering metals from solutions |
| 10/21/1997 | US5679257 Industrial waste water treatment |
| 10/21/1997 | US5679243 Water purifier having a filter replacement indicator including a circuit board and lamps |
| 10/21/1997 | US5679229 Electrodialysis including filled cell electrodialysis (electrodeionization) |
| 10/21/1997 | US5679228 Removing silica from water by increasing ph, passing through diluting compartments of electrodialysis stack containing ion exchange granules, passing direct current through stack, recovering effluent |
| 10/16/1997 | WO1997038272A1 Portable/potable water recovery and dispensing apparatus |
| 10/16/1997 | WO1997037941A2 Process for the biological purification of waste water |
| 10/16/1997 | DE19615988A1 Agent for treating waste water contaminated with cyanide, chromate or heavy metals |
| 10/16/1997 | DE19614674A1 Laundry waste water treatment process decants fluid from sludge |
| 10/15/1997 | EP0800483A1 Method for treating waste water sludge |
| 10/15/1997 | CN1161940A Method for treating dinitro-diazo-phenol waste liquid and equipment thereof |
| 10/14/1997 | US5676846 Oxidation of cyanide with hydrogen peroxide and magnesium compound |
| 10/09/1997 | WO1997036825A1 Method and apparatus for purifying water |
| 10/09/1997 | DE19613397A1 Verfahren zum biologischen Reinigen von Abwasser A method for the biological purification of waste water |
| 10/08/1997 | EP0799161A1 Process for treating waste water containing metals |
| 10/08/1997 | EP0799160A1 Process for the continuous treatment of waste water containing dissolved metals |
| 10/08/1997 | CN2264183Y Super-pureness water preparing unit |