| Patents for C02F 9 - Multistep treatment of water, waste water or sewage (41,429) |
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| 01/05/2000 | DE19829827A1 Separation of heavy metal ions from aqueous solution involves a polyelectrolyte complex comprising a polycation and a phosphone compound such as diethylenetriamine-pentamethylene phosphonic acid |
| 01/05/2000 | DE19829673A1 Verfahren und Anlage zur Behandlung von Abwasser aus der Ölfrüchte- und Getreideverarbeitung Method and apparatus for treating wastewater from oil and grain processing |
| 01/05/2000 | CN2357004Y Dual-purpose water purifier for family and outdoor |
| 01/05/2000 | CN2357003Y Dual-purpose water purifier for family and outdoor |
| 01/05/2000 | CN1240198A Closed type water washing reuse system for nickel-ceramic compound plating technology of aluminium alloy cylinder inner wall |
| 01/05/2000 | CN1240196A Desalting aqueous streams via filled cell electrodialysis |
| 12/29/1999 | WO1999067011A1 Bacteriostatic filter cartridge |
| 12/29/1999 | WO1999057067A3 Method for cleaning waste water from the production of agar-agar |
| 12/29/1999 | EP0966405A1 Treatment of effluent streams containing organic acids |
| 12/29/1999 | EP0696259B1 Apparatus for the treatment of waste water |
| 12/29/1999 | CN2356030Y Purifying ion water treatment device |
| 12/28/1999 | US6007719 For treatment of high concentrated waste water from animal husbandry, human excretion and other high organic waste; process includes warming, anaerobic digestion, separation with ultrafiltration reversed osmosis membranes |
| 12/23/1999 | WO1999066084A1 Process for separation of heavy metals from residues by use of ethylene-diamine-disuccinic acid (edds) complexant |
| 12/23/1999 | WO1999065832A1 Filter cartridge assembly |
| 12/23/1999 | WO1999065824A1 Method for separating trivalent lanthanide cations by selective complexing |
| 12/23/1999 | CA2332050A1 Process for separation of heavy metals from residues by use of ethylene-diamine-disuccinic acid (edds) complexant |
| 12/22/1999 | CN2354950Y Multifunctional personal water purifier |
| 12/22/1999 | CN2354949Y Movable container with water purifier |
| 12/21/1999 | US6004451 Electrochemical decomposition of soil and water contaminants in situ |
| 12/16/1999 | WO1999046205A3 Water recycling system for laundry or dish washing |
| 12/15/1999 | CN2353746Y Filter for water tank of high storied building |
| 12/15/1999 | CN2353745Y Domestic drinking-water purifier |
| 12/15/1999 | CN1047369C Multifunction domestic water purifying apparatus |
| 12/14/1999 | US6001246 Converting sulfuric acid based process wastewater generated in industry into sodium sulfate salt and clean water for reuse as process water by precipitation, adsorption, filtration, ultraviolet radiation treatment, evaporation etc. |
| 12/14/1999 | US6001244 Performance water purification system |
| 12/09/1999 | WO1999062831A1 Hydrogen sulfide removal methods and apparatus |
| 12/09/1999 | WO1999062826A1 Method for absorbing heavy metals |
| 12/09/1999 | CA2334262A1 Hydrogen sulfide removal methods and apparatus |
| 12/08/1999 | EP0962582A1 Metal chelate forming fiber, process for preparing the same, and method of metal ion sequestration using said fiber |
| 12/08/1999 | EP0962446A1 Dilute acid oxidation of dinitrotoluene alkaline wash water |
| 12/08/1999 | CN2352525Y Integrated water treatment equipment |
| 12/08/1999 | CN2352524Y Equipment for treating wastewater for leather processing plant |
| 12/08/1999 | CN1047157C Process for filtering, purifying, oxygenation and activating treatment of drinking water |
| 12/07/1999 | US5997812 Methods and apparatus for the application of combined fields to disinfect fluids |
| 12/07/1999 | US5997752 Water treating apparatus for raising oxygen solubility |
| 12/07/1999 | US5997750 Community drinking water purification system |
| 12/07/1999 | US5997748 System for extracting soluble heavy metals from liquid solutions |
| 12/07/1999 | US5997738 Reverse osmosis water fountain machine with water saving device |
| 12/07/1999 | US5997737 Portable skid mounted desalination apparatus |
| 12/07/1999 | US5997735 Septic tank with downstream trickling filter |
| 12/02/1999 | WO1999060838A1 Organism and method for metal recovery, remediation and separation |
| 12/02/1999 | DE19824379A1 Verfahren zur Absorption von Schwermetallen A process for absorbing heavy metals |
| 12/01/1999 | CN1237109A Flowable waste sanitizing process and system |
| 12/01/1999 | CN1046924C Component of material for purifying and mineralizing drinking water |
| 11/30/1999 | US5993749 MISE fluid treatment device |
| 11/30/1999 | US5993673 A propylene oxide/styrene monomer aqueous purge stream is contacted with a solid iron promoted alumina catalyst at conditions effective to decompose peroxides contained therein. |
| 11/30/1999 | US5993668 Method for removing metal ions and/or complexes containing metal ions from a solution |
| 11/30/1999 | US5993667 Adding an aqueous ferric salt containing solution to form a first stream containing ferric hydroxide and ferric oxyhydroxide; adding an aqueous permanganate salt containing solution to oxidize the selenium to selenite ion and manganese |
| 11/30/1999 | US5993663 Liquid filtering system in machine tools |
| 11/30/1999 | US5993659 Method and plant for waste water treatment |
| 11/25/1999 | DE19821973A1 Process and assembly to produce water of potable quality |
| 11/24/1999 | EP0958723A1 Installation for the purification of liquid manures and the like |
| 11/24/1999 | CN2350388Y Defluorinating ultrafiltering water purifier |
| 11/24/1999 | CN2350387Y Water treating device for electric water-boiling vacuum bottle |
| 11/24/1999 | CN1236330A Method and apparatus for high efficiency reverse osmosis operation |
| 11/23/1999 | US5989439 Contacting gaseous mixture of ozone and oxygen from air with a supply of water by means of venturi injection to dissolve the gas into water for eliminating odors and water pollution, feeding to swine |
| 11/23/1999 | US5989416 Wastewater treatment system |
| 11/18/1999 | WO1999058457A1 Method for treating waters, soils, sediments and/or sludges |
| 11/18/1999 | WO1999058453A1 Ultraviolet treatment for aqueous liquids |
| 11/18/1999 | DE19913609A1 Production of lime chitin useful in composite or food-preserving jelly or as chelant or dyeing reserve |
| 11/18/1999 | DE19821609A1 Precipitation of phosphate and heavy metals from water or sediment using alkaline earth metal peroxide, giving high level of phosphate removal |
| 11/17/1999 | EP0957066A1 Process for precipitating or flocculating substances from solutions |
| 11/16/1999 | CA2139934C Method and apparatus for controlling microorganisms |
| 11/13/1999 | CA2255563A1 Ultraviolet treatment for aqueous liquids |
| 11/11/1999 | WO1999057069A1 Method for treating fluid liquid containing a volatile fraction |
| 11/11/1999 | WO1999057067A2 Method for cleaning waste water from the production of agar-agar |
| 11/11/1999 | WO1999057066A1 Method for the intensive desalination of water containing non-dissolved silicon |
| 11/11/1999 | WO1999056861A1 Device for introducing gas into liquids |
| 11/11/1999 | WO1999056850A1 Chelate-forming filter, process for producing the same, and method of purifying liquid with the filter |
| 11/11/1999 | DE19835592A1 Waste liquor treatment with Fenton reagent, useful for highly concentrated waste liquor purification |
| 11/11/1999 | DE19819281A1 Verfahren zur Reinigung von Abwässern aus der Agar-Agar Produktion A process for purifying waste water from the agar-agar production |
| 11/11/1999 | DE19810976A1 Verfahren und Vorrichtung zum Reinigen von industriellem Abwasser aus Druckereien Method and apparatus for cleaning of industrial waste water from printing |
| 11/11/1999 | CA2330495A1 Method for treating fluid liquid containing a volatile fraction |
| 11/10/1999 | EP0955270A1 A method of disposing of effluents containing formaldehyde or formaldehyde precursors such as hexamine |
| 11/10/1999 | CN2347969Y Drinking water purifier |
| 11/10/1999 | CN2347968Y Multi-functional efficient water deep purifier |
| 11/09/1999 | US5980750 Process for the purification of waste wash water |
| 11/09/1999 | US5980736 Apparatus and process for processing rain and/or surface water |
| 11/09/1999 | US5980716 For purification of water by continuously removing dissolved carbon dioxide, iron oxides; for low conductivity watercooling of fuel cells |
| 11/09/1999 | US5980703 Electrolytic cell for producing acidic water and alkaline water |
| 11/09/1999 | US5979012 Mobile apparatus for dispensing and recovering water and removing waste therefrom |
| 11/04/1999 | WO1999055625A1 Use of polymer dispersions for paper mill color removal |
| 11/04/1999 | WO1999055622A1 Apparatus and process for removing strong oxidizing agents from liquids |
| 11/04/1999 | CA2330130A1 Use of polymer dispersions for paper mill color removal |
| 11/03/1999 | CN2346787Y Marine seawater desalter |
| 11/03/1999 | CN2346786Y Purified water drinking machine |
| 11/03/1999 | CN2346785Y Hyperfilevation water purifier without waste water and with automatic cleaning filtering core |
| 11/03/1999 | CN1233470A Electrolysis of water resulting in reduction of fat content in human liver |
| 11/02/1999 | US5976383 Recycle process for removing dissolved heavy metals from water with aluminum particles |
| 11/02/1999 | US5976377 System and method for the reduction of the biological oxygen demand level of a flowable waste water |
| 11/02/1999 | US5976376 Sewage treatment process |
| 11/02/1999 | US5976375 Conditioning of the recycled activated sludge (ras) prior to its return into the aeration tank. the conditioning is typically performed within the sludge return line and involves ras exposure to a waste acidic effluents |
| 11/02/1999 | US5976366 System for treating desalter effluent water |
| 10/27/1999 | EP0952115A1 Process for preparing alcohol beverages with reduced negative effects to the human liver |
| 10/27/1999 | CN2345539Y Multifunction purification and sterilization device for running water |
| 10/27/1999 | CN1233301A Metal chelate forming fiber, process for preparing the same, and method of metal ion sequestration using said fiber |
| 10/27/1999 | CN1232796A Normal temperature decomposition process of waste molasses ethanol liquid into clear water |
| 10/27/1999 | CN1232793A Film process and its equipment for reuse of oil refining sewage |
| 10/27/1999 | CN1045940C Method for treating yellow phosphorus industry waste water |
| 10/26/1999 | US5972216 For water purification needs of military forces during troop deployment, training and maneuver, disaster relief and pollution control |