| Patents for C02F 9 - Multistep treatment of water, waste water or sewage (41,429) |
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| 08/06/2002 | US6428697 System for processing waste water |
| 08/06/2002 | US6428689 Water purifying and dispensing apparatus, and method of purifying chlorine-containing water |
| 08/06/2002 | CA2301012C Bacteriostatic filter cartridge |
| 08/01/2002 | WO2002058452A2 Device for plasma chemical treatment of water in a medium of electric non-self-maintained glow discharge |
| 08/01/2002 | WO2002036499A3 Treatment of waste water and apparatus therefor |
| 08/01/2002 | US20020100729 Purification of produced water from coal seam natural gas wells using ion exchange and reverse osmosis |
| 08/01/2002 | US20020100718 Introducing waste water into anaerobic tank and aerobic tank, comprising calcium carbonate mineral placed in anaerobic tank; biologically treated water of another system introduced into aerobic tank; calcium carbonate mineral placed in aerobic tank |
| 08/01/2002 | DE10102700A1 Verfahren zur Reinigung ölhaltiger Abwässer Methods for cleaning oily wastewater |
| 07/31/2002 | CN2503065Y Integral deep treatment purifier for domestic sewage |
| 07/31/2002 | CN2503064Y Inverse circulation water purifier |
| 07/31/2002 | CN1361312A Object electroplating method and system |
| 07/31/2002 | CN1361073A Dry Nitrilon waste water treating process |
| 07/31/2002 | CN1361072A Drinking water purifying and activating treatment method |
| 07/31/2002 | CN1361071A Equivalent self-neutralizing process for regenerating effluent after water desalting treatment |
| 07/30/2002 | US6426056 Apparatus and method for preparation of a peritoneal dialysis solution |
| 07/30/2002 | US6426005 Sequential descending bed filters with reject/washwater containing impurities being fed to a separate unit for elimination of impurities |
| 07/30/2002 | US6425975 Process for concentrating soluble and colloidal substances in process waters |
| 07/30/2002 | US6425974 Process for treating wastewater from a bleach plant |
| 07/25/2002 | WO2001009041A9 System for protection of building water supplies against chemical and biological warfare agents |
| 07/25/2002 | US20020096456 Wastewater treatment system using cavitating waterjet |
| 07/25/2002 | DE10101510A1 Treatment of high sulfate content waste water involves addition of calcium chloride, alkali treatment, precipitation/flocculation, gravity separation and sludge dewatering |
| 07/24/2002 | EP1224032A1 Centrifugal pressurized separators and methods of controlling same |
| 07/24/2002 | EP1224026A1 Process for the purification of wash water from the production of aromatic acids |
| 07/24/2002 | CN2501878Y Multiple-element mineralized drinker |
| 07/24/2002 | CN1359863A Pysicochemical-biochemical process for treating ammonia-nitrogen sewage from catalytic cracking catalyst production |
| 07/24/2002 | CN1359862A Ferric-optical catalyst oxidizing process for removing microcapsule phycohepatotoxin from water |
| 07/23/2002 | US6423236 Method for treating waste water |
| 07/23/2002 | US6423228 Using calcium carbonate |
| 07/23/2002 | US6423223 Multi-element, reverse osmosis, liquid filter system with flushing and filtering circuits |
| 07/23/2002 | US6423219 System and method for controlling microorganisms and biofilms |
| 07/17/2002 | EP1222954A1 Method and apparatus for electrodeionization of water |
| 07/17/2002 | EP1080045B1 Method for treating fluid liquid containing a volatile fraction |
| 07/17/2002 | CN1359357A Method for disinfecting and purifying liquids and gasses |
| 07/17/2002 | CN1358900A Method and equipment for treating black liquor of pulp making |
| 07/17/2002 | CN1358678A Method for treating waste water in dinaphthyl phenol production |
| 07/17/2002 | CN1358676A Bow shape penetrating flow type separator and bow shape penetrating flow type film biological reactor |
| 07/17/2002 | CN1358675A Split type film biological reactor and water treatment method |
| 07/17/2002 | CN1358674A Integral type film biological reactor |
| 07/17/2002 | CN1087716C Ultraviolet disinfecting drinking-water system |
| 07/16/2002 | US6419821 Apparatus for low cost water disinfection |
| 07/10/2002 | EP1220963A1 Method for minimising the new water use in the water circulation system of a treatment plant |
| 07/10/2002 | CN2499398Y Purifier for running water and drinking water |
| 07/10/2002 | CN1357498A Micro-organism eliminating method for contaminated underground water |
| 07/09/2002 | US6416673 On premise water treatment system and method |
| 07/04/2002 | WO2002051754A1 Method of separating a surfactant from a liquid |
| 07/03/2002 | EP1218294A1 Water treatment apparatus |
| 07/03/2002 | EP1218293A1 On premise water treatment system and method |
| 07/03/2002 | EP1017637A4 Apparatus and method for oxidizing undigested wastewater sludges |
| 07/03/2002 | CN2498154Y Multifunctional household water purifier |
| 07/03/2002 | CN2498153Y Household water purifier by photocatalysis |
| 07/03/2002 | CN1356429A Process for treating intermediate waste papermaking water by use of waste |
| 07/03/2002 | CN1356275A Integrated treating system and process for cleaning sewage |
| 07/03/2002 | CN1356274A Process and equipment for purifying water by air |
| 07/03/2002 | CN1356273A Full-automatic purifying pool |
| 07/03/2002 | CN1356272A Process for preparing concentrated Se-contained natural mineral water |
| 07/02/2002 | US6412121 Thermo-evaporation type toilet system |
| 07/02/2002 | CA2108982C System for cleaning contaminated water |
| 06/27/2002 | WO2002026642A3 Water purification system |
| 06/27/2002 | WO2002004354A8 Method and device for treating waste water from launderettes |
| 06/27/2002 | WO2002000557A3 Water treatment compositions |
| 06/27/2002 | US20020079272 Method of improving the quality of diesel fuel |
| 06/27/2002 | US20020079269 Removing metal ions from wastewater |
| 06/26/2002 | EP1216210A2 Water treatment systems and methods |
| 06/26/2002 | EP1216209A1 An iron powder and sand filtration process for treatment of water contaminated with heavy metals and organic compounds |
| 06/26/2002 | CN2496866Y Activated water generation apparatus |
| 06/26/2002 | CN2496865Y Small-sized circulating water regeneration treatment machine |
| 06/26/2002 | CN2496864Y Sewage treatment apparatus |
| 06/26/2002 | CN2496863Y Water purifier |
| 06/26/2002 | CN2496862Y Water purifier especially for mineralized drinking-water machine |
| 06/26/2002 | CN2496861Y Connecting-type running-mater purifying hot-cold water drinking machine |
| 06/26/2002 | CN1355145A Floating bed equipment for cleaning sewage |
| 06/26/2002 | CN1355144A Integrated process for treating sewage by use of wind energy and biologic float bed |
| 06/26/2002 | CN1355143A Process and equipment for treating sewage in oil field |
| 06/26/2002 | CN1086663C Off-shore sewage treating and transport apparatus and method thereof |
| 06/25/2002 | US6409920 Filter device having a simplified configuration |
| 06/25/2002 | US6409889 Method for the removal and recovery of inorganic pollutants from waste aqueous solutions and waste primary air sources |
| 06/20/2002 | WO2002048431A2 Electrochemical apparatus with retractable electrode |
| 06/20/2002 | WO2002048054A1 Device and method for generating and applying ozonated water |
| 06/20/2002 | WO2002014228A3 Under the counter water treatment system |
| 06/20/2002 | US20020074287 Method for treating high-concentrated organic wastewater using bio-maker |
| 06/20/2002 | US20020074284 Treating with nitrifying microorganisms in presence of high surface area suspended carrier; preventing release of multi-valent cations |
| 06/20/2002 | US20020074243 Wherein there is no deterioration or breakage of the electrodes or deformation of the plastic case due to heat; for use in swimming pools, bathtubs, pond, farming tanks, air conditioning units |
| 06/20/2002 | DE10060478A1 Method for obtaining water free from bacteria and smells, comprises treatment of water with ozone in container filled with active carbon and/or substances containing zeolite |
| 06/19/2002 | EP1214133A2 System filter for pond water or the like |
| 06/19/2002 | CN2495642Y Precasted sewage treatment apparatus |
| 06/19/2002 | CN1354165A Control of waste water produced in furfural industry and preparation process of butyl acetate |
| 06/19/2002 | CN1354148A Comprehensive treatment process of waste liquor produced by chemical plating in nickel-phosphorus alloy acidic bath |
| 06/19/2002 | CN1354139A Method and device for treating waste water containing acetic acid |
| 06/19/2002 | CN1086366C Treatment of water containing heavy metal ions |
| 06/18/2002 | US6406622 Apparatus for filtering a fluid |
| 06/13/2002 | WO2002046107A1 Method for the recovery of iron from acidic, metal-contaminated water |
| 06/13/2002 | WO2002045816A2 Double-cartridge filter medium housing |
| 06/13/2002 | US20020070184 Multiple stages of filtration or treatment with intermediate storage; inter-stage liquid is split off to intermediate storage and then subsequently returned to a later stage of processing |
| 06/13/2002 | US20020070178 Cooling tower water cleaning system |
| 06/13/2002 | US20020070107 Water purification system and process for treating potable water for at source use |
| 06/13/2002 | US20020069664 Method and apparatus for disinfecting a water cooler reservoir |
| 06/13/2002 | US20020069653 Water producing and dispensing machine |
| 06/13/2002 | DE19900805C2 Verfahren und Vorrichtung zur Erzeugung von Reinstwasser Method and apparatus for production of ultrapure water |
| 06/12/2002 | CN2494829Y Water purifier |
| 06/12/2002 | CN2494828Y Comprehensive water purifier |