C02F - Treatment of water, waste water, sewage, or sludge

More topics under "C02F - Treatment of water, waste water, sewage, or sludge" (284,577)
C02F 1 - Treatment of water, waste water, or sewage (145,124)
C02F 101 - Nature of the contaminant (7,129)
C02F 103 - Nature of the water, waste water, sewage or sludge to be treated (11,124)
C02F 11 - Treatment of sludge; Devices therefor (21,423)
C02F 3 - Biological treatment of water, waste water, or sewage (46,453)
C02F 5 - Softening water; Preventing scale; Adding scale preventatives or scale removers to water, e.g. adding sequestering agents (8,632)
C02F 7 - Aeration of stretches of water (3,263)
C02F 9 - Multistep treatment of water, waste water or sewage (41,429)

Patents for C02F - Treatment of water, waste water, sewage, or sludge (726)
10/2001
10/04/2001	EP1137600A1 Hydrophilic dispersion polymers of diallyldimethyl ammonium chloride and acrylamide for the clarification of deinking process waters
10/02/2001	CA2076011C Purification of aqueous liquor
09/2001
09/12/2001	CN1312775A Activated carbon filter, ceramic filter element and water purification system
07/2001
07/31/2001	US6267885 Liquid sterilization apparatus
07/11/2001	CN1302769A Biochemical method for synchronously treating discharged sewage
06/2001
06/06/2001	CN1297791A Raw refuse decomposing and disposaling apparatus
05/2001
05/02/2001	EP1094986A1 Activated carbon filter, ceramic filter element and water purification system comprising both filters
04/2001
04/26/2001	WO2001028939A1 A process for dewatering of sludge
04/17/2001	US6217743 Process for recovering organic hydroxides from waste solutions
03/2001
03/28/2001	CN2425085Y Improved aeration rotary disk with oxidation channel
02/2001
02/15/2001	WO2001010785A1 Process for recovering organic hydroxides from waste solutions
02/15/2001	CA2380839A1 Process for recovering organic hydroxides from waste solutions
01/2001
01/31/2001	EP1072304A1 Vapor/liquid mixer and polluted water purification apparatus using the mixer
01/25/2001	WO2000061498A3 System for electrochemically processing a workpiece
12/2000
12/12/2000	CA2029073C Scale control in aqueous systems
10/2000
10/31/2000	CA2004817C Method and apparatus for treating water
10/19/2000	WO2000061837A1 Workpiece processor having processing chamber with improved processing fluid flow
10/19/2000	WO2000061498A2 System for electrochemically processing a workpiece
09/2000
09/20/2000	CN1267232A Process for preparation of vesicles
08/2000
08/09/2000	CN1262236A Desulfurization waste water treating method
07/2000
07/19/2000	EP0781255B1 Water treatment process
06/2000
06/08/2000	CA2351855A1 Hydrophilic dispersion polymers of diallyldimethyl ammonium chloride and acrylamide for the clarification of deinking process waters
06/07/2000	EP1005391A1 Process for preparation of vesicles
03/2000
03/15/2000	EP0794926B1 Flock separating apparatus
03/15/2000	CN1247481A Process for recovering organic hydroxides from waste solutions
01/2000
01/20/2000	WO2000002816A1 Activated carbon filter, ceramic filter element and water purification system comprising both filters
09/1999
09/14/1999	US5951845 Demetallization by metal scavenger, electrochemical machining by passing a current through the cell, regenerating the organic hydroxide, recovering from cell; waste recycling
07/1999
07/15/1999	WO1999024362A3 Drinking water formulation and method of making same
07/08/1999	WO1999033552A1 Vapor/liquid mixer and polluted water purification apparatus using the mixer
06/1999
06/08/1999	US5910237 Process for recovering organic hydroxides from waste solutions
05/1999
05/20/1999	WO1999024362A2 Drinking water formulation and method of making same
05/12/1999	CN1216290A Process for treatment of flue gas desulfurization waste water
05/11/1999	CA2074470C Method and reactor for purification of water
04/1999
04/21/1999	EP0876299A4 Liquid sterilisation apparatus
04/07/1999	CN1212898A Processes for treatment of flue gas desulfurization waste water
03/1999
03/30/1999	US5888359 Flock separating apparatus
02/1999
02/25/1999	WO1999008782A1 Process for preparation of vesicles
02/09/1999	US5868916 Process for recovering organic hydroxides from waste solutions
01/1999
01/06/1999	CN1204303A Water desalination
12/1998
12/23/1998	CN1202875A Liquid sterilisation apparatus
11/1998
11/11/1998	EP0876299A1 Liquid sterilisation apparatus
08/1998
08/20/1998	WO1998035748A1 Process for recovering organic hydroxides from waste solutions
07/1998
07/01/1998	CN1038907C Transporting element of a reciprocable scraper
05/1998
05/06/1998	EP0781255A4 Water treatment process
09/1997
09/17/1997	EP0794926A1 Flock separating apparatus
09/10/1997	EP0793987A2 A method of removing dispersed oil from an oil in water emulsion employing aerated solutions within a coalescing media
09/10/1997	CN1159177A Water treatment process
09/05/1997	CA2198325A1 A method of removing dispersed oil from an oil in water emulsion employing aerated solutions within a coalescing media
08/1997
08/12/1997	US5656173 Method of removing dispersed oil from an oil in water emulsion employing aerated solutions within a coalescing media
07/1997
07/02/1997	EP0781255A1 Water treatment process
07/01/1997	CA2108202C Reducing pulp mill liquid discharge
06/1997
06/05/1997	WO1997019896A1 Liquid sterilisation apparatus
06/05/1997	CA2226294A1 Liquid sterilisation apparatus
03/1997
03/11/1997	US5609768 Process for separating and/or recovering hydrocarbon oils from water using biodegradable absorbent sponges
10/1996
10/23/1996	EP0641295B1 Device for the purification of waste water
08/1996
08/06/1996	US5543039 Reactor for purification of water
07/1996
07/17/1996	EP0471784B1 Method and composition for treating waste water
07/03/1996	CN1125694A Apparatus for the production of drinking water
05/1996
05/30/1996	WO1996015989A1 Flock separating apparatus
03/1996
03/14/1996	WO1996007615A1 Water treatment process
10/1995
10/17/1995	US5458779 Biodegradation
07/1995
07/11/1995	US5431818 Transporting element of a reciprocable scraper for moving sludge in settling basins and similar objects at water purification plants
07/04/1995	US5429740 Device for the purification of waste water
06/1995
06/28/1995	EP0659893A1 Process for extracting and concentrating of cadmium from concentrated sulfuric effluents with a low or medium content of cadmium
05/1995
05/31/1995	EP0647209A4 Process for the removal of phosphorous.
04/1995
04/12/1995	EP0647209A1 Process for the removal of phosphorous
03/1995
03/29/1995	CN1100702A Method and apparatus for purifying waste water
03/08/1995	EP0641295A1 Device for the purification of waste water.
02/1995
02/15/1995	EP0536194B1 Purification of aqueous liquor
01/1995
01/10/1995	US5380443 Reducing concentration of zinc, copper and silver ions therein by adjusting pH to 11-12, mixing water with mixture of alkali or alkaline earth ferrate and zirconium oxychloride to form precipitate, separating purified supernatant
01/10/1995	US5380439 Water treatment with holders and perforated conduits
10/1994
10/12/1994	EP0575314B1 Method and reactor for purification of water
10/12/1994	EP0436715B1 Process for separating and/or recovering hydrocarbon oils from water using biodegradable absorbent sponges
06/1994
06/29/1994	CN1088615A Process for intensification of fermentations
05/1994
05/25/1994	EP0597950A1 Dewatering of aqueous suspensions
04/1994
04/20/1994	CN1085463A Transporting element of a reciprocable scraper for moving sludge in settling basins and similar objects at water purification plants
03/1994
03/29/1994	CA1328099C Small-pored crystalline titanium molecular sieve zeolites
03/16/1994	EP0448597B1 Method and apparatus for treating water
02/1994
02/08/1994	CA1326840C Method and apparatus for electrolytic treatment of liquids, especially waste water
01/1994
01/11/1994	CA1326006C Particulate material suitable for selectively separating metal cations from aqueous solutions, process for its production, and use thereof
01/06/1994	WO1994000391A1 Process for the removal of phosphorous
01/06/1994	CA2138259A1 Process for the removal of phosphorous
12/1993
12/29/1993	EP0575314A1 Method and reactor for purification of water.
12/29/1993	EP0483290B1 Immersible biological filter for the purification of waste water
12/08/1993	EP0572698A1 Method for treating aqueous streams containing undesired amounts of cyanide
12/04/1993	CA2070364A1 Method for treating aqueous streams containing undesired amounts of cyanide
10/1993
10/19/1993	CA1323311C Water purifying system
08/1993
08/24/1993	US5238581 Oxidative removal of cyanide from aqueous streams abetted by ultraviolet irradiation
08/18/1993	EP0410961B1 A method and an apparatus for separating solid particles from a liquid
08/03/1993	CA1320911C Purification of effluent from wood pulp bleach plant
07/1993
07/13/1993	CA1320029C Process for cleaning chlorinated water and an apparatus for carrying out the process
06/1993
06/29/1993	CA1319606C Control of biofouling in aqueous systems by non-polymeric quaternary ammonium polyhalides
04/1993
04/25/1993	CA2074609A1 Inhibition of scale formation by polyepoxysuccinic acid
04/14/1993	EP0325596B1 Hazardous waste reactor system
03/1993
03/17/1993	EP0532484A1 Transporting element of a reciprocable scraper for moving sludge in settling basins and similar objects at water purification plants
02/1993
02/18/1993	WO1993002966A1 Dewatering of aqueous suspensions
02/18/1993	CA2114437A1 Dewatering of aqueous suspensions
02/14/1993	CA2072690A1 Transporting element of a reciprocable scraper for moving sludge in settling basins and similar objects at water purification plants
01/1993
01/21/1993	WO1993001137A1 Device for the purification of waste water
01/21/1993	CA2112481A1 Device for the purification of waste water

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