| Patents for C02F 9 - Multistep treatment of water, waste water or sewage (41,429) |
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| 10/08/1997 | CN2264182Y Household high pureness drinking water generating appts. |
| 10/02/1997 | WO1997035810A2 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 |
| 10/01/1997 | EP0797543A1 Process for the treatment of metal-containing water and recovery of metals therefrom |
| 10/01/1997 | CN1160683A Method and apparatus for producing mineral water |
| 09/30/1997 | US5672328 Method and apparatus for removing silver in the form of silver salts from a liquid |
| 09/30/1997 | US5672253 Apparatus for making hexagonal and pentagonal molecular structure water |
| 09/25/1997 | WO1997035067A1 Antifoam compositions containing polymers and methods of use thereof |
| 09/25/1997 | WO1997034837A1 Method and apparatus for treating selenium-containing waste water |
| 09/25/1997 | WO1997034832A1 Water treatment device with drinking water filter, regeneration device and process for treatment of drinking water |
| 09/25/1997 | CA2249433A1 Method for treating selenium-containing wastewater and apparatus for carrying out the method |
| 09/24/1997 | CN1160024A Method for disposal of high concentration organic sewage |
| 09/23/1997 | US5670020 Foam separation method for reducing AOX, COD, and color bodies of kraft pulp bleach plant effluents |
| 09/23/1997 | US5669221 Portable, potable water recovery and dispensing apparatus |
| 09/18/1997 | WO1997033789A1 Off-shore sewage treating and handling apparatus and method |
| 09/18/1997 | WO1997033676A1 Gray water reclamation system |
| 09/18/1997 | DE19610172A1 Wasseraufbereitungsgerät mit Trinkwasserfilter, Regeneriervorrichtung und Verfahren zum Aufbereiten von Trinkwasser Water treatment device with drinking water filters, regenerating and method for producing drinking water |
| 09/18/1997 | DE19608818A1 Funnel and gate subsoil contamination barrier |
| 09/17/1997 | CN1159430A Comprehensive utilization system for restaurant three-waste treatment |
| 09/16/1997 | US5667689 Method of augmenting flow in a wastewater treatment plant |
| 09/16/1997 | US5667673 Microbial mediated water treatment |
| 09/16/1997 | US5667670 Wastewater effluent management system using a sand filter |
| 09/10/1997 | EP0794156A1 Process for the treatment of industrial waste water containing dissolved organic matters, especially starch or cellulose |
| 09/09/1997 | US5665245 By negative pressure generated by jet pump; water treatment |
| 09/09/1997 | US5665243 Method for removing metal contained in solution using surfactant having chelating ability |
| 09/09/1997 | US5665240 Point-of-use removal of lead in drinking water using phosphate and carbonate minerals |
| 09/03/1997 | EP0792196A1 Method of decontaminating contaminated material and devices therefor |
| 08/28/1997 | WO1997030938A1 Modular water-treatment apparatus |
| 08/28/1997 | WO1997030770A1 Retaining filter, plant and method for treating effluents |
| 08/28/1997 | DE19606947A1 Highly effective reaction barriers for purifying ground water, earth etc. |
| 08/28/1997 | CA2247519A1 Retaining filter, plant and method for treating effluents |
| 08/27/1997 | CN2260803Y Water magnetizing-filtering device |
| 08/26/1997 | US5660733 Sewage dewatering process |
| 08/26/1997 | US5660723 Water conserving cooling tower system |
| 08/21/1997 | WO1997029997A1 Method and plant for purification of contaminated water |
| 08/21/1997 | WO1997029996A1 Method of treating drinking water for consumption |
| 08/21/1997 | WO1997029995A1 Plant for production of drinking water from unfiltered water |
| 08/21/1997 | WO1997029994A1 Plant for purification of contaminated water |
| 08/21/1997 | WO1997029828A1 Endless bandpass filter for micro filtration |
| 08/21/1997 | DE19605422A1 Verfahren zur Aufbereitung von Trinkwasser für den Verbrauch Process for the preparation of drinking water for consumption |
| 08/20/1997 | EP0789673A1 Methods of coagulating and decolorizing waste streams |
| 08/20/1997 | CN1157267A Discharge apparatus for concentration water of water purifier |
| 08/20/1997 | CN1157264A Draining control apparatus of coldness and warmth water purifier and method thereof |
| 08/19/1997 | CA2070087C Recovery of cyanide from precious metal tailings |
| 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 | CA2248358A1 Process and plant for sewage treatment |
| 08/14/1997 | CA2197525A1 Plating waste water treatment and metals recovery method |
| 08/13/1997 | EP0789000A1 Process for treating polluted alkaline aqueous cleaning solutions |
| 08/13/1997 | EP0588820B1 Liquid treatment |
| 08/13/1997 | CN2259401Y Magnetic mineralized cup made of wood fish stone |
| 08/13/1997 | CN2259400Y Vertical limited aeration sewage treatment equipment |
| 08/13/1997 | CN1156694A Comprehensive draining treating technique for black liquor and midcourse water from caustic soda process straw pulp paper mill |
| 08/12/1997 | US5656159 Filter cartridge with integral bactericide |
| 08/07/1997 | WO1997028101A1 Method for treating aqueous liquid effluents containing organic and inorganic materials to enable recycling thereof |
| 08/07/1997 | WO1997028088A1 Water treatment device with immersion filter |
| 08/07/1997 | DE19642999A1 Industrial electro-floatation waste water treatment process |
| 08/07/1997 | DE19603494A1 Water softening process |
| 08/07/1997 | CA2254711A1 Method for treating aqueous liquid effluents containing organic and inorganic materials to enable recycling thereof |
| 08/06/1997 | EP0787109A1 Process for treating aqueous media containing metal ions |
| 08/06/1997 | EP0738238B1 Process for the wet-oxidising treatment of organic pollutants in waste water |
| 08/06/1997 | CN1156438A Process for treatment of liquid and apparatus thereof |
| 07/30/1997 | EP0785912A1 Water reuse system |
| 07/30/1997 | EP0696261B1 Method of treating waste water containing organic and inorganic compounds arising from the manufacture of epichlorohydrin |
| 07/30/1997 | EP0643673B1 Removal of cyanide from water |
| 07/30/1997 | CN1155521A Method for treating exhaust gases and foul water |
| 07/30/1997 | CN1155519A Process for treating arsenic-containing waste water |
| 07/24/1997 | WO1997026066A1 Refrigerator water filter |
| 07/24/1997 | DE19604012A1 Treatment and valorisation of used natural thermal and mineral waters and sols e.g. after use in remedial baths |
| 07/23/1997 | EP0784600A2 Method for oxidation of organic waste liquors |
| 07/23/1997 | EP0715608B1 Method of incinerating sludge resulting from waste-water treatment |
| 07/23/1997 | CN2258166Y 便携式水净化器 Portable water purifiers |
| 07/23/1997 | CN2258165Y Tap water purifier for automatically preparing cold and hot pure water |
| 07/23/1997 | CN2258158Y New water sterilizing device |
| 07/23/1997 | CN1154950A Spare-data device of cold-hot water purifying device |
| 07/22/1997 | US5650056 Uses a surfactant having hydrophilic, hydrophobic and chelation groups |
| 07/22/1997 | CA2093019E Apparatus and method for hydrolysis of cyanide-containing liquids |
| 07/17/1997 | WO1997025277A1 Cyanide removal from process water |
| 07/17/1997 | DE19600774A1 Cyanidentfernung aus Prozeßwasser Decyanidation of process water |
| 07/16/1997 | CN2257821Y Purifying mineralizing water feeder |
| 07/15/1997 | US5647996 Precipitation, iron sulfate, acid, lime |
| 07/15/1997 | US5647991 Method and apparatus for treatment of contaminated water using waste shot blast fines |
| 07/15/1997 | US5647980 Coarse and fine filters; backwashing; disinfectant chamber; settling and pump chambers |
| 07/15/1997 | US5647977 Aeration, mixing, flocculation, removal solids |
| 07/13/1997 | CA2167127A1 Water distillation apparatus |
| 07/09/1997 | EP0478583B2 Process and device for treating polluted fluids |
| 07/08/1997 | US5645725 Process and device for the biological treatment of organically polluted waste water and organic waste |
| 07/08/1997 | US5645719 Filter clamping device for water purifiers |
| 06/26/1997 | WO1997022556A1 Thermal plasma reactor and wastewater treatment method |
| 06/26/1997 | DE19703579A1 Adsorption and filtering unit with mobile adsorption layer |
| 06/25/1997 | EP0700315A4 Multi-stage water treatment system |
| 06/25/1997 | CN2256880Y Two-way pipeline type water purifier |
| 06/25/1997 | CN2256879Y Domestic water purifier |
| 06/25/1997 | CN2256878Y Domestic health water purifier |
| 06/19/1997 | WO1997021631A1 Process for the purification of effluent from 1,2-dichloroethane preparation |
| 06/18/1997 | EP0778813A1 Method for dewatering sludges |
| 06/18/1997 | CN1151974A Treating method and equipment of waste liquor from gourmet powder production |
| 06/18/1997 | CN1151973A Deep treating and reusing technology of waste water in wire producing process |
| 06/17/1997 | US5639347 Method of controlling of metals in a bleach plant, using oxidation |
| 06/12/1997 | DE19546070A1 Verfahren zur Reinigung von Abwasser aus der 1,2-Dichlorethan-Herstellung A process for purifying waste water from the manufacture of 1,2-dichloroethane- |
| 06/11/1997 | EP0778245A1 Method for removing heavy metals form waste water |