| Patents for C02F 103 - Nature of the water, waste water, sewage or sludge to be treated (11,124) |
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| 01/20/1994 | WO1994001368A1 Process and system for purifying waste water |
| 01/20/1994 | CA2139412A1 Process and system for purifying waste water |
| 01/18/1994 | US5279740 Ground contamination remediation process |
| 12/15/1993 | CN1079449A Nethod for removing sulphur compounds from water |
| 12/09/1993 | WO1993024199A1 Method for removing alkaline sulfate scale |
| 11/25/1993 | WO1993023335A1 Water clarifier with first filtrate isolation, improved backwashing and improved bubble generation |
| 11/18/1993 | EP0569372A1 Waste handling method. |
| 11/03/1993 | CN1078014A Ground contamination remediation process and apparatus |
| 10/28/1993 | WO1993021111A1 Device for removing purified water from circular settling tanks |
| 10/19/1993 | CA1323311C Water purifying system |
| 10/14/1993 | DE4223863A1 Vorrichtung zur Entnahme von geklärtem Abwasser aus Rundbecken Device for removal of clarified wastewater from circular tanks |
| 09/30/1993 | WO1993018854A1 Electrolytic cell for generating sterilization solutions having increased ozone content |
| 09/21/1993 | US5246599 Method and arrangement for treatment of sewage sludge |
| 09/02/1993 | WO1993016962A1 Apparatus for the purification of cyanide-containing waste water |
| 09/02/1993 | CA2157035A1 Apparatus for the purification of cyanide containing waste water |
| 08/19/1993 | WO1993016005A1 Process, machine and plant for extraction by evaporation of the solid residues of a fluid substance |
| 07/21/1993 | EP0551978A2 Ground contamination remediation process and apparatus |
| 07/21/1993 | CN1021657C Transition metal recovery |
| 07/13/1993 | CA1320151C Process for separating substances from a liquid and device for carrying out the process |
| 06/29/1993 | CA2015879C Process for treatment of water and apparatus therefor |
| 06/29/1993 | CA1319606C Control of biofouling in aqueous systems by non-polymeric quaternary ammonium polyhalides |
| 06/22/1993 | US5221486 Aqueous phase removal of nitrogen from nitrogen compounds |
| 04/21/1993 | CN1071146A Method for control of biofouling |
| 04/14/1993 | EP0536963A1 Process for enhancing the dewaterability of waste sludge from microbiological digestion |
| 04/12/1993 | CA2079400A1 Process for enhancing the dewaterability of waste sludge from microbiological digestion |
| 04/07/1993 | EP0535301A1 Method for the control of biofouling |
| 03/17/1993 | EP0524245A4 Process and apparatus for pathogen reduction in waste |
| 02/16/1993 | US5186837 Method for biological purification of wastewater with no excess sludge |
| 01/27/1993 | EP0524674A1 Method for removing hydrocarbon products from the surface of an acqueous medium |
| 01/27/1993 | EP0524245A1 Process and apparatus for pathogen reduction in waste. |
| 01/13/1993 | EP0522856A1 Purification of solutions |
| 01/05/1993 | US5177305 Waste incineration process |
| 12/23/1992 | WO1992022506A1 Process and device for purifying sewage |
| 11/25/1992 | EP0514543A1 Sewage purification apparatus |
| 11/19/1992 | EP0513352A1 Method of cleaning soil water |
| 11/17/1992 | US5164094 Ultrasonic energy for precipitation, flocculation, coagulation |
| 11/12/1992 | WO1992019543A1 Method and device for purification of wastewater |
| 10/29/1992 | WO1992018426A1 Aqueous phase removal of nitrogen from nitrogen compounds |
| 10/05/1992 | WO1992017410A1 Method for removing sulphur compounds from water |
| 09/08/1992 | CA1307361C Method for purifying waste water |
| 08/06/1992 | WO1992012938A1 Waste handling method |
| 08/06/1992 | CA2100087A1 Waste handling method |
| 08/05/1992 | EP0471784A4 Method and composition for treating waste water |
| 08/04/1992 | US5135655 Process for treating refinery slurries |
| 07/22/1992 | EP0494866A1 Process and device for treating, in particular cleaning, water containing halogenated ethylenes. |
| 07/22/1992 | EP0494861A1 Process for treatment of water and apparatus therefor. |
| 07/21/1992 | CA1305569C Method and apparatus for use in separating solids from liquids |
| 07/15/1992 | EP0283509B1 The control of biofouling in aqueous systems by non-polymeric quaternary ammonium polyhalides |
| 07/07/1992 | US5128051 Method for the control of biofouling |
| 07/01/1992 | EP0492188A2 Polyelectrolyte complexes |
| 06/16/1992 | US5122263 Continuously and automatically functioning device for the drainage of sludge, especially of sewage sludge |
| 05/19/1992 | US5114473 Transition metal recovery |
| 05/14/1992 | WO1992007799A1 Method to detoxify sewage sludge |
| 05/13/1992 | CN1061012A Method to detoxigy sewage sludge |
| 05/12/1992 | US5112501 Acidification, basification to reduce chemical oxygen demand |
| 05/06/1992 | EP0484268A1 Method to detoxify sewage sludge |
| 05/01/1992 | CA2041039A1 Method to detoxify sewage sludge |
| 04/22/1992 | EP0481541A1 Process for treating refinery slurries |
| 04/06/1992 | CA2052655A1 Process for treating refinery slurries |
| 03/18/1992 | EP0474890A1 Process and apparatus for sewage sludge treatment |
| 03/17/1992 | US5096599 Process for purifying the effluent from urea production plants |
| 02/26/1992 | EP0471784A1 Method and composition for treating waste water. |
| 02/11/1992 | US5087378 Process for enhancing the dewaterability of waste sludge from microbiological digestion |
| 02/11/1992 | US5087354 Pressure sensors monitor algae population by measuring associate head loss; triggering device for washing sequence |
| 12/11/1991 | EP0460814A1 Process for enhancing the dewaterability of waste sludge from microbiological digestion |
| 12/01/1991 | CA2043585A1 Process for enhancing the dewaterability of waste sludge from microbiological digestion |
| 10/09/1991 | EP0451006A1 Process for incinerating waste |
| 10/07/1991 | WO1991015432A1 Process and apparatus for pathogen reduction in waste |
| 09/24/1991 | US5051191 Method to detoxify sewage sludge |
| 08/28/1991 | EP0193565B1 Apparatus for clarification of water |
| 08/13/1991 | US5039414 Process for separating and/or recovering hydrocarbon oils from water using biodegradable absorbent sponges |
| 08/08/1991 | WO1991011392A1 Method of cleaning soil water |
| 08/08/1991 | WO1991011243A1 Device for purifying sewage |
| 08/07/1991 | CN1053598A Method and solid material body for purification of fluids such as water, aqueous fluids and liquid fuels |
| 08/06/1991 | US5037550 Biological contactor for purifying water to produce drinking water and associated control method |
| 07/30/1991 | CA2074840A1 Sewage purification apparatus |
| 07/30/1991 | CA2074829A1 Method for purifying sewage |
| 07/10/1991 | EP0435944A1 Water purifying system |
| 05/29/1991 | EP0428868A2 Materials for removing suspended impurities |
| 05/15/1991 | CN1051336A Adsorbent for removing suspended impurities and use thereof |
| 05/07/1991 | US5013458 Heating sludge by exothermic hydration of calcium oxide |
| 05/07/1991 | US5013449 Process for solute recovery utilizing recycle liquids having a stored concentration profile |
| 04/30/1991 | US5012110 Substrate and process and apparatus for the production therefor |
| 03/27/1991 | CN1050171A Process for purifying effluent from urea production plants |
| 03/20/1991 | EP0417829A1 Process for purifying the effluent from urea production plants |
| 02/27/1991 | EP0413940A2 Device for continuous and automatic draining sludge, especially sewage sludge |
| 02/20/1991 | EP0413244A2 Process for separation and recycling of by-products from the wastewater of the synthesis of 5-amino-4-chloro-2-phenyl-3(2H)-pyridazinone |
| 02/09/1991 | WO1991001946A1 Process and device for treating, in particular cleaning, water containing halogenated ethylenes |
| 02/09/1991 | CA2066212A1 Process and device for treating, in particular cleaning, water containing halogenated ethylenes |
| 02/02/1991 | WO1991001945A1 Process for separating and/or recovering hydrocarbon oils from water using biodegradable absorbent sponges |
| 02/02/1991 | CA2037925A1 Process for separating and/or recovering hydrocarbon oils from water using biodegradable absorbent sponges |
| 01/24/1991 | WO1991000849A1 Process for treatment of water and apparatus therefor |
| 11/28/1990 | EP0399809A1 Process for solute recovery utilizing recycle liquids having a stored concentration profile |
| 11/26/1990 | CA2017538A1 Process for solute recovery utilizing recycle liquids having a stored concentration profile |
| 11/13/1990 | CA1276325C Two-stage clarification process and device for liquids containing solids |
| 11/10/1990 | WO1990013519A1 Method and composition for treating waste water |
| 09/26/1990 | EP0388836A1 Composition for treating water or aqueous systems |
| 09/21/1990 | CA2012501A1 Composition for treating water or aqueous systems |
| 09/12/1990 | EP0386838A1 Method for reducing industrial or urban effluent COD |
| 09/10/1990 | CA2011869A1 Method for reducing industrial or urban effluent cod |