| Patents for C02F 9 - Multistep treatment of water, waste water or sewage (41,429) |
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| 06/28/1994 | US5324434 Water purifying apparatus |
| 06/28/1994 | US5324433 In-situ restoration of contaminated soils and groundwater |
| 06/28/1994 | US5324424 Membrane system for treating water using compressed air to pressurize reservoir |
| 06/28/1994 | CA1330458C Water treatment system |
| 06/23/1994 | DE4242520A1 Soiled brine cleaning and reprocessing for food industry |
| 06/23/1994 | CA2089243A1 Destruction of cyanide and other pollutants in aqueous solutions |
| 06/22/1994 | EP0589953A4 Treatment of waste water |
| 06/21/1994 | US5322623 Local reclamation system |
| 06/21/1994 | US5322600 Method and apparatus for removal of selenium from solution |
| 06/21/1994 | CA1330372C Combined membrane and sorption process for selective ion removal |
| 06/16/1994 | DE4341782A1 Sewage treatment and gas prodn. plant - has floating elements has plastics sandwich structure walls with ballast-fillable chambers |
| 06/15/1994 | EP0601614A1 Method and device for purifying a fluid flow |
| 06/14/1994 | US5320759 Pollution control |
| 06/14/1994 | US5320756 Method of treating aqueous alkaline effluents derived from cleaning electronic circuit assemblies |
| 06/09/1994 | WO1994012439A1 Methods and apparatus for treating electroless plating baths |
| 06/09/1994 | DE4240860A1 Appts. for physical-chemical treatment of used emulsions - esp. water-oil mixts. with cooling lubricants |
| 06/08/1994 | EP0600292A1 Process for producing a stabilised, aqueous solution of alkali metal tetrathiocarbonate and its use |
| 06/08/1994 | EP0600159A1 Retarding installation with pneumatic diaphragm pump and lift counter |
| 06/07/1994 | US5318708 Local reclamation process |
| 06/07/1994 | US5318703 Water filter module |
| 06/01/1994 | DE4240064A1 Waste water cleaning process and plant - by holding water in solid bed reactor with air flow, passing through adsorption tank, adding precipitant and sepg. pollutants by flotation and filtration |
| 05/31/1994 | US5316684 Process for reduction of hexavalent chromium |
| 05/31/1994 | US5316673 Spout assembly for self-service purified water dispenser |
| 05/31/1994 | US5316646 Controlling apparatus for continuous electrolytic ion water producing apparatus |
| 05/31/1994 | CA1329958C Process for removing nitrogen compounds from raw water |
| 05/26/1994 | DE4328569A1 Neutralisation of toxic materials - including using a number of chambers and peripheral systems for electro catalytic processing and recovery of material |
| 05/26/1994 | DE4238719A1 Paint and print shop waste water processing |
| 05/25/1994 | EP0597950A1 Dewatering of aqueous suspensions |
| 05/25/1994 | CN2166126Y Deironing & Demanganesing water purifier |
| 05/24/1994 | US5314629 Method and system for treating drinking water |
| 05/24/1994 | US5314623 Method for treating fluids |
| 05/24/1994 | US5314621 Method for the biological purification of wastewater |
| 05/24/1994 | US5314527 Treatment with acid, sodium chloride and sodium hypochlorite |
| 05/19/1994 | DE4238289A1 Pretreatment of waste water from gas scrubbing - by acid gas stripping, wet oxidn. and ammonia stripping |
| 05/17/1994 | US5312551 Treatment of septic tanks and mud dehydration |
| 05/11/1994 | EP0596559A1 Method for the elimination of arsenic-containing warfare agents |
| 05/11/1994 | CN1086498A Yellow phosphorus containing waste water treatment by multi-stage oxidizing and settling |
| 05/10/1994 | US5310486 Multi-stage water treatment system and method for operating the same |
| 05/10/1994 | US5310465 Electrodialytic oxydation-reduction of metals |
| 05/05/1994 | DE4237288A1 Thermal disposal of hazardous waste - esp. medical, laundry and chemcial cleaning waste, using pyrolysis combustion furnace |
| 05/04/1994 | EP0595789A1 Process for detoxifying cyanides containing aqueous solutions |
| 05/03/1994 | US5308501 Treatment system for alkaline or acidic solution containing heavy metals |
| 05/03/1994 | US5308492 Water treatment with membranes |
| 05/03/1994 | US5308482 Portable water-purifying devices |
| 04/28/1994 | WO1994008905A1 Process for treating industrial waste waters with low concentrations of toxic organic pollutants |
| 04/28/1994 | DE4335996A1 Cleaning lightly soiled water supplies - using reaction agent and coagulant together with compressed air to separate impurities with bubbles for removal |
| 04/28/1994 | DE4334945A1 Ultra pure water prodn - by distilling water with oxidising agent or reagent to destroy organic matter together with ultra violet light |
| 04/28/1994 | CA2147253A1 Process for treating industrial waste waters with low concentrations of toxic organic pollutants |
| 04/27/1994 | EP0593420A1 Lubricant and use thereof |
| 04/27/1994 | EP0523081B1 Process and installation for purifying waste water |
| 04/27/1994 | EP0460203B1 Method for recovering metals from waste liquors |
| 04/26/1994 | US5306425 Wastewater treatment mechanism |
| 04/13/1994 | EP0592372A2 Transportable reverse osmosis water purification unit |
| 04/13/1994 | CN1085191A Process for preparing deuterium-free water |
| 04/12/1994 | US5302298 Wet oxidation with ozone-containing gas and ultraviolet radiation |
| 04/12/1994 | US5302290 Method for removing toxic anions from water |
| 04/12/1994 | US5302288 Treatment of highly colored wastewaters |
| 04/12/1994 | US5302287 Breaking up soil, mixing with water, biodegradable detergent, separating floating contaminants, repeating, adding activator for microorganisms which remove remaining contaminants, separating, washing, returning, recycling decontaminated water |
| 04/06/1994 | EP0589953A1 Treatment of waste water |
| 04/06/1994 | CN1084827A Mineralization magnetic water device |
| 03/30/1994 | EP0588820A1 Liquid treatment. |
| 03/30/1994 | CN1084497A Apparatus and method for purifying high density organic sewage |
| 03/29/1994 | US5298169 Reaction of sulfuric acid with calcium material to form gypsum then mixing with a calcium substance, filtration and clarification |
| 03/24/1994 | DE4231292A1 Solidification of inorganic waste prods. from metal surface treatment - by treating aq. soln. of waste in reaction vessel with vacuum and introducing calcium oxide |
| 03/17/1994 | WO1994005850A1 Method of treating process water |
| 03/17/1994 | WO1994005603A1 Process for removing heavy metals, in particular mercury, from flue gas scrubber effluents |
| 03/17/1994 | DE4230798A1 Treatment appts. for machining coolant - includes multistage filter and UV irradiation unit |
| 03/17/1994 | DE4229662A1 Verfahren zur Entfernung von Schwermetallen, insbesondere von Quecksilber, aus aus Rauchgaswäschern stammenden Abwässern Process for the removal of heavy metals, especially mercury, from originating from flue gas scrubbers wastewater |
| 03/17/1994 | DE4227767A1 Domestic drinking water filter - has three filter stages and regeneration stage and compact plastic housing contg. filters in cartridge form |
| 03/17/1994 | CA2139566A1 Method of treating process water |
| 03/16/1994 | EP0586998A1 Process and device for the treatment of waste water containing organic matter, especially chlorinated organic compounds from the production of epichlorohydrine |
| 03/15/1994 | US5294417 Decomposing the nitrate in an alkaline aqueous solution with a hypochlorite; reducing the hypochlorite and adding a mercury precipitating agent |
| 03/15/1994 | US5294310 Surfactant recovery process |
| 03/10/1994 | DE4229356A1 Treating waste water esp. from epichlorohydrin mfr. - by two-stage dechlorination and dehydrochlorination, providing efficient and simple removal of adsorbable organo:halogen cpds. |
| 03/10/1994 | DE4229355A1 Process and appts for the removal of chlorinated organic cpds from effluent - esp. from epichlorohydrin prodn |
| 03/09/1994 | EP0586005A1 Method and apparatus for extracting a spilled fluid from a sub-surface of earth |
| 03/09/1994 | CN2158406Y Multi-function water purification equipment |
| 03/08/1994 | US5292456 Waste site reclamation with recovery of radionuclides and metals |
| 03/08/1994 | US5292435 Adding alkali sulfite, ferrous salt |
| 03/08/1994 | US5292412 Electrolytic cell having cathode of tin, copper, silver, or alloys thereof |
| 03/03/1994 | WO1994004242A1 Processing plant for waste water treatment |
| 03/03/1994 | DE4228860A1 Compact water treatment appts. - has integrated filter and steriliser at the water outlet, useful for campers, tourists, etc. |
| 03/03/1994 | DE4228460A1 Treating cyanide-contg. effluent, e.g. from electroplating industry - by preheating effluent and then mixing with hydrogen peroxide. |
| 03/03/1994 | CA2142268A1 Processing plant for waste water treatment |
| 03/02/1994 | EP0585036A1 Apparatus for producing ultra-pure water |
| 03/01/1994 | US5290528 Contacting with carbonated aqueous solution to leach arsenic |
| 03/01/1994 | US5290455 Removal of cyanide from aqueous streams |
| 03/01/1994 | US5290454 Filtration of pulps and sludge with resin particles and fatty acids |
| 03/01/1994 | US5290442 Self-contained, purified drinking water refrigerator storage apparatus |
| 02/23/1994 | EP0486574B1 Improved sewage treatment process |
| 02/22/1994 | US5288737 Wastewater treatment apparatus |
| 02/22/1994 | US5288412 Gray water processing system |
| 02/22/1994 | US5288373 Electrolysis, decomposition |
| 02/22/1994 | US5288330 Method and apparatus for removing contaminants from particulate material |
| 02/17/1994 | WO1994003402A1 Process and device for the biological treatment of organically polluted waste water and organic waste |
| 02/17/1994 | DE4226570A1 Aufbereitungsanlage für die Behandlung von Abwässern Treatment plant for waste water treatment |
| 02/16/1994 | EP0582600A1 System for cleaning contaminated water |
| 02/16/1994 | CN1082121A Method for treating pickle liquor |
| 02/15/1994 | CA1327027C Treatment of mine tailings |
| 02/09/1994 | EP0582539A1 Chemical pre-treatment and biological destruction of propylene carbonate waste effluent streams to reduce the biological oxygen demand thereof |