| Patents for C02F 9 - Multistep treatment of water, waste water or sewage (41,429) |
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| 09/11/1998 | WO1998039258A1 Process for treating wastewater |
| 09/11/1998 | CA2199682A1 Wastewater treatment apparatus |
| 09/09/1998 | EP0863113A1 Process for treating wastewater |
| 09/09/1998 | EP0863111A1 Process for the decoloration of an effluent containing aromatic amines |
| 09/09/1998 | EP0862539A1 Method for pretreating raw water |
| 09/09/1998 | EP0862538A2 Process and device for treating water contaminated with micro-organisms and/or harmful pollutants |
| 09/08/1998 | US5804076 Method for treatment of waste water and/or exhaust gases containing flourine and surface active agents |
| 09/08/1998 | US5803139 System for supplying readily available potable water |
| 09/02/1998 | EP0861810A2 Process for the treatment of liquid residues from photographic processes |
| 09/02/1998 | EP0861807A2 Process for the treatment of liquid residues from photographic processes |
| 09/02/1998 | EP0715607B1 Device for purifying waste water or ground water |
| 09/02/1998 | CN2289788Y Unpowered biological septic-tank |
| 09/02/1998 | CN2289787Y Water storage household purifier |
| 09/01/1998 | US5800716 Processes for the treatment of acidic liquors and for the production of commercial products thereby |
| 08/27/1998 | WO1998037028A1 Apparatus and method for treating waste water from a residential home |
| 08/27/1998 | DE19706580A1 Small-scale continual process and assembly to soften and sterilise water |
| 08/26/1998 | EP0721428B1 Process for making paper and cardboard |
| 08/26/1998 | EP0637570B1 Treatment of solid and liquid effluents from tan-yards for removing and recovering the chromium contained in the effluents |
| 08/26/1998 | CN1191206A Method and system for physical purifying of industrial sewage |
| 08/25/1998 | US5798046 Enhanced removal of hydrophobic contaminants from water clarification systems |
| 08/20/1998 | WO1998035748A1 Process for recovering organic hydroxides from waste solutions |
| 08/20/1998 | DE19707339A1 Treating red sludge from mining operations, by mixing with chalk and water |
| 08/19/1998 | CN2288178Y Super efficient water purifier |
| 08/19/1998 | CN2288177Y Submerged filter |
| 08/11/1998 | US5792364 Wastewater treatment process for vacuum degasser effluent |
| 08/06/1998 | DE19650191C1 Process and assembly to filter water provided especially for domestic drinking purposes |
| 08/05/1998 | CN1189463A Method for extracting chromium from chroming waste water and waste slag |
| 08/04/1998 | US5788858 Transportable; reverse osmosis filtration |
| 08/04/1998 | US5788838 Ultrapure water production system having pretreatment system for performing both anaerobic and aerobic organism treatments |
| 08/04/1998 | US5787537 Method of washing laundry and recycling wash water |
| 07/29/1998 | CN1188743A Comprehensive effluent disposal technology for wet spinning acrylic fibers industry |
| 07/28/1998 | US5785863 Removing metals from aqueous waste streams |
| 07/23/1998 | WO1998031779A1 Separation of heavy metals and materials for use in this |
| 07/23/1998 | WO1998031636A1 System and method for the electronic treatment of cooling tower water |
| 07/23/1998 | CA2277156A1 Separation of heavy metals and materials for use in this |
| 07/22/1998 | EP0853986A1 Separation of heavy metals and materials for use in this |
| 07/22/1998 | EP0853651A1 Cleaning compositions for oil and gas wells, lines, casings, formations and equipment and methods of use |
| 07/22/1998 | CN2286478Y Back washing and separated drum type high effect domestic water purifying apparatus |
| 07/21/1998 | US5783374 Process for processing photographic baths from color processes |
| 07/21/1998 | US5783084 Treating and separating impurities and contaminants; neutralizing sulfuric acid to produce clean sodium sulfate brine; heating to obtain sodium sulfate salt and distilled water |
| 07/21/1998 | US5783061 Method of removing iron compounds and chromium compounds from an aqueous electrolytic solution as well as the use of this method in electrochemical machining |
| 07/16/1998 | WO1998020910A3 Flowable waste sanitizing process and system |
| 07/15/1998 | CN1187472A Technique for treating high-concentration gourmet powder waste water |
| 07/14/1998 | US5779908 Adding oxidizing agent and passing through magnetic field; flocculation, flotation, defoaming |
| 07/14/1998 | CA2120989C Method for purifying industrial sewage water |
| 07/09/1998 | WO1998013301A3 Apparatus and method for removal of radionuclides and heavy metal ions by ferrite formation and co-precipitation |
| 07/08/1998 | EP0852222A1 Processes and devices for disinfecting and recycling an aqueous effluent |
| 07/08/1998 | CN2285771Y Purifying water supply apparatus |
| 07/07/1998 | US5776339 Water purifier having purified water storage tank and valve for discharging purified water before reaching the tank |
| 07/07/1998 | US5776333 On premise water treatment apparatus |
| 07/07/1998 | CA2108023C Transportable reverse osmosis water purification unit |
| 07/07/1998 | CA2062204C System for treating contaminated groundwater |
| 07/01/1998 | CN2285290Y Domestic mineral water generator |
| 06/30/1998 | US5772891 Water treating method for treating waste water by using ion exchange resin |
| 06/30/1998 | US5772887 Decontamination of liquids with flowing streams in chemical reactors |
| 06/30/1998 | US5772776 Process for the recovery of heavy metals such as lead from metal contaminated soil |
| 06/30/1998 | US5772119 Dehalogenation |
| 06/25/1998 | DE19755396A1 Purification of waste water from production of polymer dispersions |
| 06/25/1998 | DE19653415A1 Treatment of steam generated during mash and wort cooking in brewing process |
| 06/24/1998 | CN2284783Y Improved structure of side filter for large water-circulating system |
| 06/24/1998 | CN2284779Y Structure-improved water sterilizer |
| 06/23/1998 | US5770090 Method for recovery of heavy metal from waste water |
| 06/23/1998 | US5770071 Sand filter for a wastewater effluent management system |
| 06/23/1998 | US5770056 Sewage dewatering equipment |
| 06/18/1998 | WO1998025858A1 Closed-loop wastewater treatment system |
| 06/17/1998 | EP0847374A1 Process for water treatment in a closed circuit with a reactor |
| 06/17/1998 | CN2284239Y Filter element of water purifier |
| 06/17/1998 | CN2284238Y Drink tube sterilizing and purifying filter element |
| 06/17/1998 | CN2284237Y Water filling sterilizing and purifying filter element |
| 06/17/1998 | CN1184796A High effect green organic fertilizer, and method for making same |
| 06/17/1998 | CN1184785A Method and equipment for quickly treating waste water for paper mill |
| 06/16/1998 | US5766485 Color removal from effluent waters |
| 06/11/1998 | WO1998025126A1 Method for monitoring the oxidation of organic compounds in an aqueous medium and implementing device |
| 06/10/1998 | EP0784600B1 Method for oxidation of organic waste liquors |
| 06/10/1998 | EP0749403B1 Process for purifying and reusing surfactant-containing waste waters |
| 06/10/1998 | CN2283651Y 净水器 Water Purifier |
| 06/10/1998 | CN2283650Y Multifunction water purifier |
| 06/09/1998 | US5762808 Destruction of electron affinic contaminants during water treatment using free radical processes |
| 06/09/1998 | US5762807 Demetallization by reacting water dissolved sulfur with alkali metal or alkaline earth metal hydroxide to reduce hydrogen sulfide emission |
| 06/09/1998 | US5762802 Dilute acid oxidation of dinitrotoluene alkaline wash water |
| 06/04/1998 | WO1998023545A1 Water strainer/purifier and method of using same |
| 06/04/1998 | CA2267941A1 Water strainer/purifier and method of using same |
| 06/03/1998 | EP0844981A1 Magnetic separation |
| 06/03/1998 | CN1183387A Three-stage high-quality water purifier |
| 06/03/1998 | CN1183386A Apparatus specially adapted for treatment of straw papermaking waste water |
| 06/02/1998 | US5759401 Process for removing phosphate from waste water |
| 05/28/1998 | WO1998022393A1 Method for separating organic waste |
| 05/27/1998 | EP0844216A2 A method for treating polluted material by wet oxidation |
| 05/27/1998 | EP0844031A1 System for treating and discharging groundwater from a polluted site isolated from the environment by an impervious wall in the soil |
| 05/26/1998 | US5755973 Portable wastewater treatment method |
| 05/26/1998 | US5755957 Water supply shut-off device for water purifier |
| 05/22/1998 | WO1998021153A1 Device for cleaning polluted water |
| 05/22/1998 | WO1998020910A2 Flowable waste sanitizing process and system |
| 05/22/1998 | CA2221862A1 Dosing counter |
| 05/20/1998 | EP0842123A1 Process for the biological decontamination of contaminated material |
| 05/20/1998 | EP0799161B1 Process for treating waste water containing thallium |
| 05/20/1998 | DE19647512A1 Mobile waste water treatment assembly |
| 05/20/1998 | CN1182055A Water purification system capable of efficiently and reliably removing various pollutants different in size |
| 05/20/1998 | CN1182054A Water purifying and activating method |
| 05/19/1998 | US5753125 Method for recovering and separating metals from waste streams |