| Patents for C02F 9 - Multistep treatment of water, waste water or sewage (41,429) |
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| 09/16/1992 | EP0503115A1 Process and apparatus for biological purification of waste waters polluted with non-biodegradable or hardly biodegradable substances |
| 09/15/1992 | US5147532 Domestic grey water purifier using diverter and UV filter treater with preheater |
| 09/15/1992 | US5147530 Well water removal and treatment system |
| 09/09/1992 | WO1992015529A1 Purification of waste streams |
| 09/09/1992 | EP0502460A2 System for treating contaminated groundwater |
| 09/09/1992 | EP0417185B1 A process for removing nitrogen compounds from raw water |
| 09/08/1992 | US5145585 Method and apparatus for treating water in a cooling system |
| 09/08/1992 | US5145576 Devices for treating human or animal dejections by means of microwaves |
| 09/03/1992 | DE4106138A1 Treating water contg. particles of concrete - by pumping water collecting tank via flocculant dosing point into settling tank having overflow weir and conical floor with outlet valve |
| 09/02/1992 | EP0500559A1 Method of processing used paper in the presence of hydroxysulphonate salts |
| 09/01/1992 | US5143619 Separate activated sludge treatment, biodegradation, adsorption of organic halogens, circulation; water pollution control |
| 08/26/1992 | CN1017987B Method for treatment of phenolic and aldehyde-contg. wastewater |
| 08/25/1992 | US5142002 Compositions for germ removal from water |
| 08/25/1992 | US5141653 Apparatus and method for treating a fluid |
| 08/20/1992 | DE4105036A1 Treatment of effluent water contg. cement or concrete solids - by incorporating an antisticking agent for the cement, removing coarse solids and pumping the water contg. the fine solids to a filter unit |
| 08/19/1992 | EP0375683B1 Method and apparatus for cleaning freight containers as well as for treating and circulating the fluids used |
| 08/18/1992 | US5139676 Bacteriostatic water and method for producing the same |
| 08/13/1992 | DE4135724A1 Appts. for adsorption of contaminants in waste water - comprises adsorbent suspension of lignite coke or activated carbon dust mixed with water and later removed by flocculation or filtration |
| 08/13/1992 | DE4104094A1 Procedure and device for pre-clearing waste liq. such as pig slurry - after removal of coarse solid material, water undergoes ozonisation and electrolysis in prepn. for biological treatment |
| 08/12/1992 | EP0498337A1 Process for liquid manure disposal |
| 08/12/1992 | EP0313633B1 Method and apparatus for treating water, water treated thus obtained and its utilization |
| 08/06/1992 | WO1992012944A1 A method of and an apparatus for separating liquid manure into a thick slurry phase with high dry matter content and an aqueous phase with desired - high, moderate or low - n-content |
| 08/06/1992 | DE4103165A1 Purifying contaminated effluent waters - by liq. liq. extraction followed by treatment in adsorption reactor |
| 08/05/1992 | EP0486574A4 Improved sewage treatment process |
| 08/05/1992 | EP0471784A4 Method and composition for treating waste water |
| 08/04/1992 | US5135663 Adding base, reducing agent, cationic flocculant, separating formed polymer |
| 08/04/1992 | US5135659 Agricultural waste water treatment |
| 08/04/1992 | US5135654 Method for treating fluids |
| 08/04/1992 | US5135648 Universal liquid reduction and treatment system |
| 07/31/1992 | CA2060251A1 Waste water treatment equipment |
| 07/30/1992 | DE4102238A1 Clarifying aq. polymeric dispersions - by electrolytically treating so polymeric particles accumulate on electrode before discharge |
| 07/22/1992 | CN1017521B Full water treatment apparatus for use in soft drink dispensing system |
| 07/15/1992 | EP0494399A1 Process to direct and treat production waters in a paper factory with installation for treatment of waste paper |
| 07/15/1992 | EP0333796B1 Process and device for processing hydroxide sludges |
| 07/09/1992 | WO1992008675A3 Method of detoxyfying cyanide waste |
| 07/08/1992 | EP0493869A1 Apparatus for treating water |
| 07/08/1992 | EP0139002B1 Mobile fluid purification unit |
| 07/08/1992 | CN2109391U Water purifying and softening sterilizer |
| 07/08/1992 | CN1062517A Comprehensive treatment technology for waste sizing liquid |
| 07/07/1992 | US5128047 Sequential separation of metals by controlled pH precipitation |
| 07/01/1992 | EP0492329A1 Process for the treatment of hydrogen sulfide, hydrogen cyanide and ammonia containing aqueous solutions |
| 07/01/1992 | EP0492121A1 Process of treating sludge from paper production effluents and use of this sludge |
| 06/30/1992 | US5126049 Precipitation of formed ammonium ions as struvite |
| 06/30/1992 | US5126048 Removing iron and manganese by oxidation; forming regenerative membrane by control of pH |
| 06/25/1992 | WO1992010427A1 Method of water purification |
| 06/25/1992 | DE4142890A1 Biological cleaning by homogenising and filtering - is useful for treating waste waters, fats and oils etc., and reduces cleaning time with no residue formation |
| 06/24/1992 | EP0491533A2 A method of restoring contaminated solids using ion exchange powder contact |
| 06/22/1992 | WO1992011212A1 Process and device for biologically purifying substances |
| 06/22/1992 | CA2074804A1 Process and apparatus for the biological purification of substances |
| 06/18/1992 | CA2057728A1 Cost effective process for detoxification of cyanide containing effluents |
| 06/18/1992 | CA2057703A1 Method of restoring contaminated solids using ion exchange powder contact |
| 06/17/1992 | DE4040007A1 Dismantlable self-service car wash unit - with integral wash water cleaning and recycling system |
| 06/16/1992 | CA1303325C Water treating apparatus |
| 06/11/1992 | DE4138431A1 Filter for processing liquids, esp. water - in compact arrangement using replaceable filter elements, coarse filter contains ion separating electrodes and its outlet connects to fine filter |
| 06/11/1992 | DE4039068A1 Processing filters contg. e.g. heavy metals - by submerging filter and mechanically or ultrasonically treating while contaminants are removed by suitable precipitating agent |
| 06/10/1992 | EP0489080A1 Treatment method for emulsified petroleum wastes. |
| 06/09/1992 | US5120453 Oxidative removal of cyanide from aqueous streams |
| 06/09/1992 | US5120451 Process for reducing the cyanide content of a solution |
| 06/09/1992 | US5120448 Removal of aox frm bleach plant mill effluents by ph shift using the alkalinity/acidity sources available at the mill |
| 06/09/1992 | US5120447 Method for removing heavy metals from wastewater |
| 06/09/1992 | US5120435 Pre-treatment sewer discharge system |
| 06/09/1992 | CA1303259C System and method for treating pulp and paper mill waste water |
| 06/08/1992 | WO1992010263A1 Method and apparatus to detoxify aqueous based hazardous waste |
| 06/08/1992 | CA2097520A1 Method and apparatus to detoxify aqueous based hazardous waste |
| 06/03/1992 | EP0488665A1 Adsorbents for the removal of volatile substances from aqueous systems |
| 06/02/1992 | US5118422 Photocatalytic treatment of water |
| 05/31/1992 | CA2056020A1 Adsorbents for the removal of volatile substances from aqueous systems |
| 05/29/1992 | WO1992008825A1 Method for purifying concentrated, aqueous and used solutions of chromic acid, and solutions thereby purified |
| 05/29/1992 | WO1992008677A1 Water filters |
| 05/29/1992 | WO1992008675A2 Method of detoxyfying cyanide waste |
| 05/29/1992 | WO1992008674A1 A method for treating an organic substance |
| 05/27/1992 | EP0486656A1 Composition for inhibiting stress cracks in plastic articles and methods of use therefor. |
| 05/27/1992 | EP0486588A1 Process and apparatus for recycling food processing water |
| 05/27/1992 | EP0486574A1 Improved sewage treatment process. |
| 05/26/1992 | US5116509 Oxidation of organics, continuous processing |
| 05/26/1992 | US5116507 Treatment for reducing impurities in aqueous liquor |
| 05/20/1992 | CN2104862U Salt water desalter |
| 05/20/1992 | CN1061201A Comprehensive processing method of tannery waste water |
| 05/19/1992 | US5114576 Prevention of contaminants buildup in captured and recirculated water systems |
| 05/19/1992 | US5114571 Controlling scale, corrosion, bacteria and algae |
| 05/14/1992 | WO1992007799A1 Method to detoxify sewage sludge |
| 05/14/1992 | DE4035433A1 Sepg. oil and soiling agent contg. water from laundries - by heating and mixing with per:chloroethylene, sepg. oil and water phases by ultrafiltration and distilling to separate agent and solvent |
| 05/13/1992 | EP0484352A1 Process, installation and reactor for biological treatment of waste water |
| 05/13/1992 | CN1061013A Double layer cyclic 4-belts filtered well |
| 05/13/1992 | CN1061012A Method to detoxigy sewage sludge |
| 05/12/1992 | US5112494 Adsorption on porous solid, metal sulfide promoter, oxidation |
| 05/12/1992 | US5112477 Vending, filters, reverse osmosis membrane |
| 05/06/1992 | EP0484268A1 Method to detoxify sewage sludge |
| 05/06/1992 | EP0483738A1 Apparatus and process for water conditioning |
| 05/05/1992 | US5110482 Water repurification method of city water and its equipment |
| 05/05/1992 | US5110481 Method for separation of polyvinyl alcohol from aqueous solutions thereof using peroxodisulfates |
| 05/05/1992 | US5110479 Water purification systems |
| 05/05/1992 | US5110468 Fresh water generator |
| 05/01/1992 | CA2041039A1 Method to detoxify sewage sludge |
| 04/28/1992 | US5108621 Method of neutralizing hazardous products |
| 04/28/1992 | US5108620 Removal of zinc as contaminant by reacting with sodium salt of dimethyldithiocarbamic/or diethyldithiocarbamic acid |
| 04/28/1992 | US5108590 Water dispenser |
| 04/23/1992 | DE4122113A1 Removing mercury from sewage sludge - by drying in two stages and use of dried sludge as fuel, esp. with fossil fuel in rotating cement furnace |
| 04/22/1992 | CN1060452A Removal of cyanide from aqueous streams |
| 04/21/1992 | US5106508 Integrated process for cyanide and heavy metal removal from plating process waste streams |