| Patents for C02F 9 - Multistep treatment of water, waste water or sewage (41,429) |
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| 05/13/1998 | EP0799160B1 Process for the continuous treatment of waste water containing dissolved metals |
| 05/13/1998 | CN2281349Y Water purifier with fan body |
| 05/13/1998 | CN1181358A Deep purifying and reclaiming appts. and method for industrial organic sewage |
| 05/12/1998 | US5750034 Hydrophilic dispersion polymers for the clarification of deinking process waters |
| 05/12/1998 | US5750033 Method of treating waste water to remove harmful ion by coagulating sedimentation |
| 05/12/1998 | US5750006 Process for making paper and cardboard |
| 05/07/1998 | WO1998018726A1 Process and plant for treating an aqueous waste stream containing at least one alkali metal carboxylate |
| 05/07/1998 | WO1998018725A1 Multi-chamber water purification device and method of using the same |
| 05/06/1998 | EP0839767A2 Hydrophilic dispersion polymers for the clarification of deinking process waters |
| 05/06/1998 | CN2280712Y Multi-pole water treatment device |
| 05/05/1998 | US5746920 Process for purifying dairy wastewater |
| 05/01/1998 | CA2219868A1 Hydrophilic dispersion polymers for the clarification of deinking process waters |
| 04/30/1998 | DE19642839A1 Removal of radioactive contaminants from aqueous mining effluent |
| 04/29/1998 | EP0838435A1 Process and plant for treating an aqueous waste stream containing alkali metal carboxylates |
| 04/29/1998 | CN2280098Y Wastewater treatment equipment |
| 04/29/1998 | CN1180050A Method for treating wastewater containing hazardous matter using electron beam irradiation |
| 04/28/1998 | US5744028 Water treating apparatus |
| 04/28/1998 | CA2058972C Process and installation for treating liquids charged with pollutants |
| 04/23/1998 | WO1998016680A1 Metal chelate forming fiber, process for preparing the same, and method of metal ion sequestration using said fiber |
| 04/23/1998 | WO1998016476A1 Process for the removal of dissolved metals and/or metalloids from an aqueous medium containing same and having a high content of salt |
| 04/23/1998 | DE19646414C1 Small-scale municipal waste water treatment plant combines filtration with electrical treatment |
| 04/22/1998 | CN1179286A Process for preparing beverage by fermenting waste liquid |
| 04/21/1998 | US5741398 Heating at alkalinine ph |
| 04/16/1998 | DE19641018A1 Treating waste water, e.g. from gas pipe washing |
| 04/15/1998 | CN2278690Y Continuous strong oxidation ion water producer |
| 04/15/1998 | CN2278689Y Ion water producer |
| 04/15/1998 | CN2278688Y Direct water purifier with mineral filter material and Chinese medicine layer in pipeline |
| 04/15/1998 | CN1178776A Technology for treating waste water of paper making |
| 04/15/1998 | CN1178773A Super grade high efficiency water purifier |
| 04/08/1998 | CN2277989Y Domestic water purifying, magnetizing and mineralizing device |
| 04/08/1998 | CN2277988Y Device for cleaning and purifying running-water |
| 04/08/1998 | CN1178513A Process for high concentrated waste water treatment using membrane separation |
| 04/08/1998 | CN1178198A Process and apparatus for producing superpurified water |
| 04/02/1998 | WO1998013308A1 Process for the treatment and decontamination of acid waters which contain dissolved metals and their conversion into fertilizers (pidra process) |
| 04/02/1998 | WO1998013303A1 Method and apparatus for producing a sterilising solution |
| 04/02/1998 | WO1998013301A2 Apparatus and method for removal of radionuclides and heavy metal ions by ferrite formation and co-precipitation |
| 04/02/1998 | DE19625985A1 Processing recirculated water from separation stage in treatment plant |
| 04/01/1998 | EP0832850A1 Method and apparatus for producing a sterilising solution |
| 04/01/1998 | EP0832042A2 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 |
| 04/01/1998 | EP0729439B1 Method for purifying process water from pulp manufacture |
| 03/26/1998 | WO1998012489A1 Purified water supply apparatus |
| 03/25/1998 | EP0830207A1 Process and device for the treatment of waste water from the wet dedusting of shredders |
| 03/25/1998 | CN2276938Y Separating equipment for papermaking white water |
| 03/25/1998 | CN1176940A Method for treatment of organic sewerage |
| 03/25/1998 | CN1176938A Electrolytic hydrogen dissolved water, and method and apparatus of production thereof |
| 03/24/1998 | US5730884 Method of removing selenate ion from selenate ion-containing aqueous waste liquid |
| 03/24/1998 | US5730879 Process for conditioning recirculated evaporative cooling water |
| 03/24/1998 | US5730873 From a low ph metal salt solution by adding a substrate and enzyme which will cause rise in ph; groundwater treatment |
| 03/24/1998 | US5730856 Method for treating waste liquid with electrolytic oxidation and apparatus for carrying out the same |
| 03/19/1998 | WO1998010851A1 Separation and purification of fluoride from industrial waste |
| 03/18/1998 | EP0829456A2 Sewage Treatment Plant |
| 03/17/1998 | US5728295 Apparatus for removing metal ions and/or complexes containing metal ions from a solution |
| 03/11/1998 | CN2276021Y Improved biological contact filler |
| 03/11/1998 | CN2276020Y 净水器 Water Purifier |
| 03/11/1998 | CN2276019Y Ultrafiltration water purifier |
| 03/11/1998 | CN1175625A Process for producing fresh wiping solution and for treating used solution and apparatus for carrying out the process |
| 03/11/1998 | CN1175556A Facilities for treating waste water on large scale |
| 03/11/1998 | CN1175555A Method and apparatus for treating sewage from oil refinery in two steps |
| 03/10/1998 | US5725766 Sewage dewatering equipment |
| 03/10/1998 | US5725762 Separation treatment system |
| 03/05/1998 | DE19634208A1 Waste water treatment treated by low-voltage oxidative-electrochemical process on stainless steel cathode electrode |
| 03/04/1998 | EP0826636A1 Water containing dissolved electrolytic hydrogen, and method and apparatus of production thereof |
| 03/04/1998 | EP0826502A1 Method and means for realising a fresh cleaning solution and for treating the used solution |
| 03/04/1998 | CN2275580Y Tower plate type sewage treater |
| 03/04/1998 | CN1174818A No sewage discharge treatinent method for black liquor in paper making |
| 03/04/1998 | CN1174816A Sewage treating device |
| 02/25/1998 | EP0825293A1 Enhanced removal of hydrophobic contaminants from water clarification systems |
| 02/25/1998 | EP0824504A1 Improved destruction of electron affinic contaminants during water treatment using free radical processes |
| 02/25/1998 | EP0824503A1 Waste water treatment process for producing high yields of drinking water |
| 02/25/1998 | CN2275093Y 多功能自动净水器 Multi-functional automatic water purifier |
| 02/25/1998 | CN2275092Y Household water purifier |
| 02/25/1998 | CN1174541A Purifying apparatus |
| 02/25/1998 | CN1174178A Comprehensive treatment process for waste papermaking straw pulp liquor |
| 02/24/1998 | US5720885 Portable |
| 02/24/1998 | US5720882 Treatment method for waste water sludge comprising phoshorous, heavy metals and at least one metal |
| 02/24/1998 | US5720869 Removing suspended solids, deionization, ion exchanging, electrolysis |
| 02/20/1998 | CA2213367A1 Enhanced removal of hydrophobic contaminants from water clarification systems |
| 02/19/1998 | WO1998006483A1 Method and apparatus for high efficiency reverse osmosis operation |
| 02/19/1998 | WO1998001065A3 Device for treatment of possibly contaminated sludge occurring in sanitary facilities |
| 02/18/1998 | EP0824089A1 Process for drying galvanic sludge |
| 02/13/1998 | CA2183146A1 Method and apparatus for management wastewater effluent from various wastewater effluent sources |
| 02/12/1998 | WO1998005595A1 Methods and apparatus for the application of combined fields to disinfect fluids |
| 02/12/1998 | WO1998005594A1 A portable water purification system |
| 02/10/1998 | US5715699 Refrigerator water filter |
| 02/05/1998 | WO1998004501A1 Wastewater treatment system and method |
| 02/05/1998 | DE19726269A1 Removal of e.g. heavy metal or fluoride ions from effluent |
| 02/04/1998 | EP0648193B1 Process and system for purifying waste water |
| 02/04/1998 | CN2273703Y Filtering apparatus for drinking water |
| 01/29/1998 | WO1998003715A1 Apparatus and method for washing laundry |
| 01/28/1998 | EP0770039A4 Decontamination system with improved components |
| 01/28/1998 | CN2273309Y Filtering water purifying machine |
| 01/28/1998 | CN1171272A Sterilizer for cold/hot water purifier and controlling method thereof |
| 01/27/1998 | US5711887 Treatment of river, lake, and well water with ozone to produce potable water |
| 01/22/1998 | DE19730937A1 Water treatment system for rain and surface water |
| 01/21/1998 | EP0819651A1 Cationic polymer composition for sludge dewatering |
| 01/21/1998 | EP0819457A1 Process and apparatus for the filtration of sewage |
| 01/21/1998 | EP0819099A1 A process for high concentrated waste water treatment using membrane separation |
| 01/19/1998 | CA2210865A1 Cationic polymer composition for sludge dewatering |
| 01/15/1998 | WO1998001065A2 Device for treatment of possibly contaminated sludge occurring in sanitary facilities |
| 01/14/1998 | EP0818421A2 Process and apparatus for treatment of water and for keeping it clean |