| Patents for C02F 9 - Multistep treatment of water, waste water or sewage (41,429) |
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| 06/06/2001 | CN1297844A Comprehensive treatment process of producing active carbon with papermaking effluent |
| 06/05/2001 | US6242650 By contacting with an agent like an alkali metal sulfite, an alkaline earth metal sulfite, an alkali metal hydrogensulfite, an alkaline earth metal hydrogensulfite or their mixtures;simple and efficent method, cost reduction |
| 05/31/2001 | WO2001038419A1 Method and apparatus for the production of polycarbonates with brine recycling |
| 05/31/2001 | DE19956726A1 Removing heavy metal, especially nickel, ions from waste water in the metal processing industries by further treating the hydroxide precipitate with an excess of sulfide and then filtering and oxidizing the sulfide |
| 05/31/2001 | DE19955459A1 Therapeutic drinking water oxygen-enriched and sterilized to individual requirements by array of pressurized mixer vessels |
| 05/31/2001 | DE10004590A1 Waste water treatment, especially for use in the paper industry, comprises pre-treatment, eg by filtration or complex-former addition, prior to multistage membrane filtration and combustion of residues |
| 05/30/2001 | EP1102724A2 Method and installation for treating waste water from oil seed and cereal processing |
| 05/30/2001 | EP1102621A1 Method for reducing scaling in electrodeionization systems |
| 05/30/2001 | CN1296925A Process for treating percolate from garbage filling field |
| 05/30/2001 | CN1296924A Sewage treating process in urban area |
| 05/29/2001 | US6238569 Flotation pile oil/water separator apparatus |
| 05/29/2001 | US6237352 Water producing and dispensing machine |
| 05/29/2001 | CA2182357C Method of treating waste water to remove harmful ion by coagulating sedimentation |
| 05/25/2001 | WO2001036338A1 Process and system for treatment of waste streams containing water-soluble polymers |
| 05/23/2001 | EP1101754A2 Method for the reduction of sulphur-containing, nitrification-inhibiting compounds |
| 05/23/2001 | EP0844981B1 Biomagnetic separation |
| 05/23/2001 | CN2431280Y Full-closed reverse osmosis mineralizing type cold/hot water purifier |
| 05/23/2001 | CN1295982A Running water purifier and making method thereof |
| 05/23/2001 | CN1295981A Method and apparatus for treating sewage from catering business |
| 05/23/2001 | CN1066128C Purifying reusing apparatus for industrial organic sewage |
| 05/23/2001 | CN1066127C Method for direct using waste water in circular water |
| 05/22/2001 | US6235204 Method and system for removal of selenium from FGD scrubber purge water |
| 05/22/2001 | US6235191 Water purifying apparatus capable of reliably preventing growth of bacteria during suspension of water supply by efficiently activating a sterilization unit |
| 05/22/2001 | US6235186 Apparatus for producing electrolytic water |
| 05/22/2001 | CA2324635A1 Process for reducing the amount of nitrification-inhibiting sulfur compounds |
| 05/17/2001 | WO2001034524A1 Method for treating water containing sulfates |
| 05/17/2001 | WO2001034523A1 Treatment of contaminated waste water |
| 05/17/2001 | WO2001034443A1 Method for cleaning and a vehicle cleaning system |
| 05/17/2001 | WO2001034012A1 Mobile waste treatment system |
| 05/17/2001 | WO2000078681A3 Point-of-use water treatment system |
| 05/17/2001 | DE19954437A1 Waste water treatment plant incorporates sludge settlement stages, oil separator, biological treatment and storage, being of prefabricated, partitioned construction |
| 05/17/2001 | DE19949265A1 Verfahren zum Minimieren des Neuwassereinsatzes im Wasserkreislauf bei einer Aufbereitungsanlage A method for minimizing the Neuwassereinsatzes in the water cycle at a treatment plant |
| 05/16/2001 | EP1099020A1 A process for concentrating soluble and colloidal substances in process waters |
| 05/16/2001 | CN2430443Y Storage tank for pure water |
| 05/16/2001 | CN1295034A Recovery and treatment method of waste water containing high-concentration benzene dicarboxylic acid |
| 05/15/2001 | US6231766 Water treatment process |
| 05/10/2001 | WO2001032567A1 Method for treating aqueous effluents containing peroxidized compounds |
| 05/10/2001 | WO2001032561A1 Process for the purification of industrial waste water from a propylene oxide production process |
| 05/10/2001 | DE19954680A1 Ship borne water effluent treated by high concentration bio-process for membrane separation and re-use under rapidly changing conditions |
| 05/10/2001 | DE19950064A1 Filteranlage für Wasser Filter system for water |
| 05/10/2001 | DE19949154A1 Water treatment apparatus for raising oxygen solubility in high purity drinking water comprises high-pressure pump, closed container, ozone injector, cooler, and supersonic vibrator |
| 05/10/2001 | CA2389696A1 Method for treating aqueous effluents containing peroxidized compounds |
| 05/09/2001 | EP1097908A1 Circuit purification for the papermaking industry |
| 05/09/2001 | EP1097906A1 Process for eliminating solid particles, especially silicon and /or aluminium particles, from aqueous effluents |
| 05/09/2001 | CN2429525Y Automatic energy saving domestic sewage treating apparatus |
| 05/09/2001 | CN2429524Y Apparatus for activating drinking water by electromagnetic field |
| 05/09/2001 | CN2429523Y Apparatus for recovering and purifying waste water and gasses from coke oven |
| 05/09/2001 | CN1294235A Toilet with chlorine remover |
| 05/09/2001 | CN1065514C Tandem waste stream treatment for removal of nitroaromatics and nitrophenolics compounds |
| 05/08/2001 | US6228263 Treatment of sulphate- and metal-containing water |
| 05/08/2001 | US6228259 Oxygenated water cooler |
| 05/08/2001 | US6228255 Portable water treatment facility |
| 05/03/2001 | WO2001030708A1 Clarification treatment apparatus and method for clarification treatment |
| 05/03/2001 | WO2001030706A1 Improved method and apparatus for water treatment |
| 05/03/2001 | WO2001030704A1 Improved process for water treatment |
| 05/03/2001 | WO2001030703A1 Improvements in water generating devices |
| 05/03/2001 | WO2001012559B1 On premise water treatment system and method |
| 05/02/2001 | EP1095912A1 Process for water treatment |
| 05/02/2001 | EP1095911A1 Method and device for treating manganese containing water |
| 05/02/2001 | EP1094986A1 Activated carbon filter, ceramic filter element and water purification system comprising both filters |
| 05/02/2001 | CN1293160A Biochemical process for treating sewage with microbes |
| 05/02/2001 | CN1293159A Biological process for treating sewage generated by dry production of acrylic fibres |
| 05/02/2001 | CN1065216C Method and system for physical purifying of industrial sewage |
| 05/02/2001 | CN1065148C Home water purification system |
| 04/26/2001 | WO2001028937A1 Water purifying apparatus having a plurality of purifying stages |
| 04/26/2001 | WO2001028931A1 Waste treatment process |
| 04/26/2001 | CA2292338A1 Method and apparatus for cleaning and/or processing municipal and/or industrial waste water |
| 04/25/2001 | EP1094038A1 A process for treating water containing copper |
| 04/25/2001 | EP1042233A4 METHOD AND APPARATUS FOR ADJUSTING THE pH OF A LIQUID |
| 04/25/2001 | CN1292768A Method and device for treating manganese containing water |
| 04/25/2001 | CN1064936C Water purifier |
| 04/24/2001 | US6221257 Apparatus and method for treatment of discharged water and other fluids |
| 04/19/2001 | WO2001027383A1 Method for minimising the new water use in the water circulation system of a treatment plant |
| 04/19/2001 | WO2001027035A1 Water purifying system |
| 04/19/2001 | CA2387140A1 Method for minimising the new water use in the water circulation system of a treatment plant |
| 04/18/2001 | EP1092684A2 Method and apparatus for the treatment of wiping solution |
| 04/18/2001 | EP1092682A1 Device for filtering and ultraviolet disinfection of water |
| 04/18/2001 | EP1092475A2 Waste water treatment apparatus |
| 04/18/2001 | EP1091910A1 Hydrogen sulfide removal methods and apparatus |
| 04/18/2001 | EP1091909A1 Method for absorbing heavy metals |
| 04/18/2001 | CN2426877Y 一体化压力式自动净水器 Integrated pressure automatic water purifier |
| 04/18/2001 | CN1292053A Method for treating process water |
| 04/18/2001 | CN1291593A Full-automatic water mineralizing pool |
| 04/18/2001 | CN1291589A Electrolytic reduction water and anti-cancer medicine and preparation method and equipment thereof |
| 04/17/2001 | US6217765 Waste water treatment method and waste water treatment equipment capable of treating fluorine waste water containing organic matter, phosphor and hydrogen peroxide |
| 04/17/2001 | US6217759 Installation for biochemical sewage treatment |
| 04/17/2001 | US6217753 Apparatus for regulating flow of water into water purifier responsive to downstream pressure sensor |
| 04/17/2001 | US6217743 Process for recovering organic hydroxides from waste solutions |
| 04/12/2001 | WO2001024604A1 Closed and energetically integrated process (cei process for the treatment of animal wastes (purines) |
| 04/12/2001 | WO2000048943A8 Reverse osmosis system with biological contamination prevention |
| 04/12/2001 | DE19949434A1 Fuzzy logic controlled ultra-violet and hydrogen peroxide waste water treatment process |
| 04/12/2001 | DE10022502A1 Biological adjustment of a neutral to basic pH liquid or solid, particularly waste water, involves decomposition using an organic acid by adding oxygen to immobilize metal ions |
| 04/11/2001 | EP1090885A1 Process for demineralizing water, particularly by electrodeionization |
| 04/11/2001 | EP1090880A1 Electrolytic ozone generating method, system and ozone water producing system |
| 04/11/2001 | EP1090668A1 Chelate-forming filter, process for producing the same, and method of purifying liquid with the filter |
| 04/11/2001 | EP1090151A1 Process for separation of heavy metals from residues by use of of ethylenediamine-disuccinic acid (edds) complexant |
| 04/11/2001 | EP1089943A1 Filter cartridge assembly |
| 04/11/2001 | CN1290663A Deep processing method for deodorizing waste water by soll microorganism |
| 04/11/2001 | CN1290662A Sterilizing system and method for high quality drinking water |
| 04/11/2001 | CN1290661A Fully automatic water purifying and mineralizing pool |