| Patents for C02F 9 - Multistep treatment of water, waste water or sewage (41,429) |
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| 02/09/1993 | CA1313503C Full water treatment apparatus for use in soft drink dispensing system |
| 02/04/1993 | WO1993002391A1 Treatment of photographic effluent |
| 02/04/1993 | DE4225210A1 Ultra-pure water appts. - has vigorous gas mixture with water at feed to the reaction vessel with separate outlets for gas and water |
| 02/04/1993 | DE4125910C1 Recovery of chromium from waste water - comprises adding base to waste water contg. trivalent chromium and organic solvent to ppte. chromium hydroxide |
| 02/02/1993 | US5183577 Process for treatment of wastewater containing inorganic ammonium salts |
| 01/27/1993 | EP0524917A1 A process and system for clarifying wash-up waters |
| 01/26/1993 | US5182023 Process for removing arsenic from water |
| 01/20/1993 | CN1068090A Method for treatment of waste sacrose liquid |
| 01/20/1993 | CN1068089A Method for treatment of waste printing water and special apparatus thereof |
| 01/19/1993 | US5180497 Method for decolorization of waste water |
| 01/19/1993 | US5180013 Method for in situ removal of a spilled fluid from soil |
| 01/13/1993 | CN1067871A Surface water treating method and device |
| 01/13/1993 | CN1067870A System and method for removing ammonia and nitrogen in waste water |
| 01/12/1993 | US5178775 Hydrogen peroxide, sulfur dioxide, sulfites of group 1a or 2a |
| 01/12/1993 | US5178758 Biochemical water filter |
| 01/12/1993 | US5178755 UV-enhanced ozone wastewater treatment system |
| 01/07/1993 | EP0521308A1 Process for joint treatment of NH3 and/or H2S containing process waste waters as well as sodium sulfide containing caustic soda |
| 01/07/1993 | DE4121181A1 Decontamination of polluted soil, etc. - by washing in fluidised bed, rinsing with water and recycling |
| 01/05/1993 | CA1312198C Treatment of waste and a rotary kiln therefor |
| 12/30/1992 | EP0520793A1 Method of treating waste solution of non-silver halide light-sensitive material |
| 12/29/1992 | US5174901 Pretreatment with sand and carbon filter; then cationic reverse osmosis membranes |
| 12/29/1992 | US5174879 Apparatus for simultaneous disinfection and removal of nitrate/nitrite ions and other adsorbable chemicals from drinking water |
| 12/24/1992 | DE4120519A1 Reducing loading of waste water esp. from cellulose@ industry - by physico-chemical flocculation before biological purificn. |
| 12/24/1992 | DE4120068A1 Reducing heavy metal content of waste water esp. in dentistry - by use of agent contg. substances absorbing heavy metals by ion-exchange or chemical bonding |
| 12/23/1992 | WO1992022506A1 Process and device for purifying sewage |
| 12/23/1992 | EP0383765B1 Sewage treatment plant |
| 12/23/1992 | CN1067230A Process for treatment of waste water and recycle water containing ammonia from nitrogen fertilizer plant |
| 12/22/1992 | US5173208 Flocculating agent of polyoxyethylene glycol, a carrier of a mixture of a glycol and glycerine and a suspension agent of a polymeric fatty acid ester and a dispersant |
| 12/22/1992 | US5173190 Reconditioning and reuse of chilled water for poultry and food processing |
| 12/22/1992 | US5173184 Wastewater treatment apparatus |
| 12/22/1992 | US5173180 Domestic water conservation system |
| 12/22/1992 | US5173179 Removal of contaminants and recovery of metals from waste solutions |
| 12/22/1992 | US5173178 Water purifying apparatus with timed discharge after non-use periods |
| 12/22/1992 | US5173157 Method for processing residual fixing-baths |
| 12/22/1992 | CA1311717C Effluent treatment |
| 12/18/1992 | CA2058745A1 Liquid suspension of polyethylene oxide for use in treating paper and pulp wastewater |
| 12/17/1992 | DE4119718A1 Portable sewage treatment assembly - has pre-flotation section and two=stage treatment section with aerobic and anaerobic biological actions |
| 12/17/1992 | DE4119144A1 Biological, chemical and physical processing of contaminated water - involves pre-treatment with oxidising agents including hydrogen peroxide and catalysts |
| 12/15/1992 | US5171451 Simultaneous use of water soluble polymers with ozone in cooling water systems |
| 12/15/1992 | US5171442 Water purification apparatus |
| 12/15/1992 | US5171334 Diffused air stripping system |
| 12/12/1992 | WO1992022504A1 Treatment of waste water |
| 12/12/1992 | CA2103247A1 Treatment of waste water |
| 12/09/1992 | EP0238639B1 Method of treating fluids |
| 12/09/1992 | CN2124235U Multifunction water purifying device for town and country |
| 12/08/1992 | US5169532 Method for biological removal of cyanides, thiocyanate and toxic heavy metals from highly alkaline environments |
| 12/08/1992 | US5169004 Method of and apparatus for treating building rubble |
| 12/02/1992 | EP0516305A1 Simultaneous use of water soluble polymers with ozone in cooling water systems |
| 12/02/1992 | EP0515686A1 Method of water purification |
| 12/02/1992 | EP0515627A1 Process and device for biologically purifying substances |
| 12/02/1992 | EP0402406B1 Portable water-purifying devices |
| 12/02/1992 | CN1019291B Process for treating the efflvent from cyanogenation in the polymethylmethacrylate plant |
| 11/26/1992 | WO1992020627A1 Liquid treatment |
| 11/26/1992 | WO1992020625A1 Water purification process and system |
| 11/26/1992 | WO1992020624A1 Methods and apparatus for producing potable water |
| 11/26/1992 | DE4116557A1 Processing of waste paper - using recycled water from paper machine with waste water treatment system |
| 11/25/1992 | EP0514543A1 Sewage purification apparatus |
| 11/25/1992 | EP0514453A1 Treatment of wastewater. |
| 11/25/1992 | EP0514443A1 Method and apparatus for removing silver in the form of silver salts from a liquid. |
| 11/25/1992 | EP0486588A4 Process and apparatus for recycling food processing water |
| 11/24/1992 | CA2062476A1 Reduction of organic pesticide content in agricultural waste water |
| 11/19/1992 | EP0513352A1 Method of cleaning soil water |
| 11/12/1992 | WO1992019556A1 System for cleaning contaminated soil |
| 11/12/1992 | DE4114667A1 Animal waste processing - by collecting methane gas from manure container as fuel and manure is spun and drying while steam is condensed and returned to water supply |
| 11/11/1992 | CA2068101A1 Secondary treatment of an integrated paper mill effluent |
| 11/03/1992 | US5160637 Apparatus and method for hydrolysis of cyanide-containing liquids |
| 11/03/1992 | US5160632 Cyanide removal from coke oven wash waters |
| 11/03/1992 | US5160631 Method for treating chelant solutions to remove metals in solution |
| 11/03/1992 | US5160628 Method of making a filler from automotive paint sludge, filler, and sealant containing a filler |
| 11/03/1992 | US5160606 Gray water recovery system with ozone treatment |
| 11/03/1992 | US5160443 Filter loop pump, flow control valve, centrifuge, holding tank, suction T-joint; hazardous wastes; truck houses |
| 11/03/1992 | US5160417 Electrolytic process for treatment of photographic wastewater effluent |
| 11/03/1992 | US5160038 Water purifying apparatus |
| 10/29/1992 | DE4113813A1 Cleaning waste water from printing operations - in which desorption air is purified in activated carbon@ filter before venting, and desorbed water is further filtered |
| 10/27/1992 | US5158686 Impurity removal process and apparatus |
| 10/22/1992 | DE4131905A1 Purifying waste water in dentists surgery - by passing water through holding tank in which impurities are sedimented and drained at intervals into removable container for disposal |
| 10/21/1992 | CN1018729B Method for treating waste liquid from gourmet powder plant and products thereof |
| 10/20/1992 | US5156739 Eductor to reduce pressure |
| 10/14/1992 | EP0508953A1 Method for scale, corrosion and microbiological control in aqueous systems |
| 10/14/1992 | CN1018662B Improvement of water purification system |
| 10/13/1992 | US5154833 Removal of mercury from waste streams |
| 10/13/1992 | US5154830 Process of removing phosphorus and suspended matter from waste water |
| 10/09/1992 | CA2065201A1 Method for scale, corrosion and microbiological control in aqueous systems |
| 10/07/1992 | EP0507073A1 Installation for biological elimination of noxious substances from polluted waste waters |
| 10/07/1992 | CN2118074U Permanent-magnet separating apparatus for treating waste water of iron and steel plant |
| 10/06/1992 | US5152074 Raw sewage drying apparatus |
| 10/06/1992 | CA1308379C Process for lubricating and cleaning of bottle conveyor belts in the beverage industry |
| 10/01/1992 | DE4109872A1 Removal of oxidisable nitrogen cpds. from water - by treatment with peroxy-di:sulphate and ultraviolet light |
| 09/30/1992 | EP0505752A1 Process for detoxifying cyanides containing aqueous solutions |
| 09/29/1992 | US5151252 Ultraviolet radiation of fluids for photochemical reactions |
| 09/29/1992 | CA1307879C A method for purifying resin-containing waste liquor in the manufacture of cellulose pulps |
| 09/24/1992 | DE4109017A1 Handling rinsing water in surface treatment units - where water from different tanks or groups of tanks is separately circulated and treated and is mixed with water from other tanks as appropriate |
| 09/23/1992 | EP0505125A2 Water purifying apparatus |
| 09/23/1992 | CN2116690U Counter type quick and high efficiency water purifier |
| 09/22/1992 | US5149441 Method of treating wastewater containing heat-curable (meth) acrylic monomer compositions |
| 09/22/1992 | US5149437 Water filter |
| 09/22/1992 | CA1307717C Method and apparatus for cleaning freight containers as well as for treating and circulating the fluids used |
| 09/17/1992 | WO1992015528A1 Method for removing and/or recovering mercury |
| 09/16/1992 | EP0504065A1 Process and installation for biological waste water purification |
| 09/16/1992 | EP0503649A1 Process and apparatus for biological purification of waste waters polluted with non biodegradable or hardly biodegradable substances |