| Patents for C02F 9 - Multistep treatment of water, waste water or sewage (41,429) |
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| 10/09/2002 | CN2515196Y Domestic purified mineralized magnetized drinker |
| 10/08/2002 | US6462250 Method for decomposing halogenated aliphatic hydrocarbon compounds having adsorption process and apparatus for decomposition having adsorption means |
| 10/08/2002 | US6461524 Method of filtering a fluid |
| 10/08/2002 | US6461520 User-activated ultra-violet water treatment unit |
| 10/08/2002 | US6461519 Process for producing ultra-pure water, and configuration for carrying out a process of this nature |
| 10/08/2002 | US6461514 High water recovery single stage membrane process |
| 10/08/2002 | US6461512 Method of disinfecting a deionized water producing apparatus and method of producing deionized water |
| 10/03/2002 | US20020139750 Bromine biocide removal |
| 10/02/2002 | EP1244601A1 Waste treatment process |
| 10/02/2002 | EP1129032B1 Method for reducing metal ion concentration in brine solution |
| 10/02/2002 | EP0886599B1 Off-shore sewage treating and handling apparatus and method |
| 10/02/2002 | CN2513990Y Device for safe reliably removing pyrogen |
| 10/02/2002 | CN1371875A Complete set waste water treatment technology and automatic controller thereof |
| 10/02/2002 | CN1371594A Stereo greening method and pant cultivating bed for storied building |
| 09/26/2002 | WO2002058452A3 Device for plasma chemical treatment of water in a medium of electric non-self-maintained glow discharge |
| 09/26/2002 | US20020134722 Ultrapure water producing apparatus |
| 09/26/2002 | US20020134674 Electrochemical apparatus with retractable electrode |
| 09/25/2002 | EP1242502A1 Method and apparatus for the production of polycarbonates with brine recycling |
| 09/25/2002 | EP1242312A2 Device and method for treating water with ozone generated by water electrolysis |
| 09/25/2002 | CN1370749A Completely recovering cyanide containing effluent treating method and treater |
| 09/25/2002 | CN1370748A Treatment process of ferric oxide pigments |
| 09/24/2002 | US6454952 Potable water or other fluids with radiant energy from an ultraviolet lamp; pressure is relatively low |
| 09/19/2002 | WO2002072228A1 Combined filter manifold and shut-off valve for a water purification system |
| 09/19/2002 | CA2439700A1 Combined filter manifold and shut-off valve for a water purification system |
| 09/18/2002 | CN1370134A Point-of-use water treatment system |
| 09/18/2002 | CN1369444A Waste water treatment process and treatment appts. |
| 09/18/2002 | CN1369443A Waste water treatment process and treatment appts. |
| 09/18/2002 | CN1369442A Process for treating acidic sewage with high-density mud |
| 09/18/2002 | CN1091078C Film process and its equipment for reuse of oil refining sewage |
| 09/17/2002 | US6451211 On premise water treatment method for use in a post mix beverage dispenser |
| 09/17/2002 | US6451209 Filtration using membrane filters and exposure to radiation from lamps to remove chloroamines and impurities from chlorinated water of sports equipment |
| 09/17/2002 | US6451202 Point-of-use water treatment system |
| 09/12/2002 | US20020125191 Method and apparatus for high efficiency reverse osmosis operation |
| 09/12/2002 | US20020125186 In-line filtration system for treatment of septic tank effluent |
| 09/12/2002 | US20020125183 Combined filter manifold and shut-off valve for a water purification system |
| 09/12/2002 | US20020125182 Filter element for water treatment |
| 09/12/2002 | US20020125137 Method and apparatus for electrodeionization of water |
| 09/11/2002 | EP1237820A1 Process and system for treatment of waste streams containing water-soluble polymers |
| 09/11/2002 | CN2510491Y Three-stage water purifying device |
| 09/11/2002 | CN1368483A Biological intensified process for treating sewage generated in preparing gas from oil |
| 09/11/2002 | CN1368482A Automatized energy-saving technology and apparatus running intermittently for treating sewage |
| 09/11/2002 | CN1368481A Process for treating waste saponifying alkali solution by chemical method |
| 09/06/2002 | WO2002068343A1 Wastewater treatment system |
| 09/06/2002 | WO2002068340A1 Drain treating method, drain treating device and drain treating system |
| 09/06/2002 | WO2002068339A1 Method and system for treating nitrogen-containing compound |
| 09/06/2002 | WO2002042216A3 Ozone generator |
| 09/05/2002 | US20020121479 Method and apparatus for treatment of drinking water |
| 09/05/2002 | US20020121475 Intergranular etching; immersing in plating solution con-taining hydrogen peroxide, sulfuric acid or a sulfonic acid, five membered nitrogen heterocyclic compound and such as triphenyl sulfonium chloride |
| 09/04/2002 | EP1236684A1 Water purifier |
| 09/04/2002 | EP1236683A1 Water purifier |
| 09/04/2002 | EP1235752A1 Process for recovering organic hydroxides from waste solutions |
| 09/04/2002 | EP1235750A1 Water purifying system |
| 09/04/2002 | EP1235613A2 Fluid processing systems and methods using extracorporeal fluid flow panels oriented within a cartridge |
| 09/04/2002 | EP1235507A1 Mobile waste treatment system |
| 09/04/2002 | CN2509184Y Electrolytic magnetizing mineral spring functional water making machine |
| 09/04/2002 | CN2509183Y Integrated sewage treatment equipment |
| 09/04/2002 | CN1367759A Hybrid chemical and biological process for decontaminating sludge from municipal sewage |
| 09/04/2002 | CN1367148A High-effective energy-saving sewage treatment method |
| 09/04/2002 | CN1367147A High-concentration ammonia nitrogen waste water treatment method |
| 09/04/2002 | CN1367146A Method for controlling oil-bearing waste water |
| 09/04/2002 | CN1367145A Water-cleaning machine |
| 09/04/2002 | CN1367137A Method for purifying ferrous salt solution |
| 09/03/2002 | US6444131 Bubbling oxidizing gas |
| 09/03/2002 | US6444015 Apparatus for treating gas containing substance to be decomposed and method of treating its gas |
| 08/29/2002 | WO2002066382A1 High efficiency electrolysis cell for generating oxidants in solutions |
| 08/29/2002 | US20020117458 Ozone is dissolved in treated wastewater and used for separation and oxidation; for use on marine vessels |
| 08/28/2002 | EP1234802A1 Improved method and apparatus for water treatment |
| 08/28/2002 | CN2507858Y Integral sewage treating device |
| 08/28/2002 | CN2507857Y Domestic waste water circulation treating device |
| 08/27/2002 | US6440307 Retaining filter, plant and method for treating effluents |
| 08/27/2002 | US6440304 Removal filter; containing lightweight particles; water pollution control |
| 08/27/2002 | US6440300 Water treatment system for swimming pool water |
| 08/27/2002 | CA2086523C Process for the purification of water |
| 08/22/2002 | WO2002064513A1 Water treatment plant with ballasted flocs and degreasing |
| 08/22/2002 | WO2002064512A1 Method and plant for thickening sludge derived from water treatment by flocculation-decantation with ballasted floc |
| 08/22/2002 | WO2002064511A1 Buoyant electrolysis device for treating a reservoir of water |
| 08/22/2002 | US20020113022 Method and apparatus for low cost water disinfection |
| 08/22/2002 | US20020112952 Object plating method and system |
| 08/22/2002 | CA2445652A1 Buoyant electrolysis device for treating a reservoir of water |
| 08/21/2002 | EP1233004A1 Desalting aqueous streams via filled cell electrodialysis |
| 08/21/2002 | CN1364733A Waste water treating and resource recovering method for 1,2-diazo-oxy-naphthalene-4-sulfonic acid production |
| 08/21/2002 | CN1364732A Method and device for purifying slightly polluted water source by using air floated biological active carbon |
| 08/21/2002 | CN1089318C Ozone disinfecting drinking water system for use in building and its control method |
| 08/20/2002 | US6436299 Generation of electromagnetic radiation using electrical signals from controllers, which monitors emitters and filters using radio frequency |
| 08/20/2002 | US6436289 Vertical membrane storage system and method of storing liquids using the same |
| 08/20/2002 | US6436283 Portable rainwater collecting and purifying system |
| 08/15/2002 | WO2002062711A1 Free atom aqueous solution producing apparatus, free-atom aqueous solution producing method, and free-atom aqueous solution |
| 08/15/2002 | WO2002062710A1 Filter equipment and process for the treatment of waste water containing inorganic, organic pollution and/or pathogens |
| 08/14/2002 | EP1230174A1 Method for treating aqueous effluents containing peroxidized compounds |
| 08/14/2002 | EP1230169A1 Process for the purification of industrial waste water from a propylene oxide production process |
| 08/14/2002 | EP1230165A1 Method and apparatus for multistage liquid filtration |
| 08/14/2002 | EP1229980A2 Method and apparatus for treating of water/wastewater |
| 08/14/2002 | EP0766648B1 Process for treatment of a fluid and apparatus therefor |
| 08/14/2002 | CN1363527A Combined treating process and equipment under background of circulating water leakage |
| 08/13/2002 | US6432312 Closed system for rearing aquatic life |
| 08/13/2002 | US6432233 Composite filter element |
| 08/08/2002 | US20020104803 Carbon adsorption column removes hydrogen peroxide in the wastewater feed containing high solids. A ion exchange unit removes the metal ions from solution. |
| 08/07/2002 | EP1228003A2 On premise water treatment system with temperature control water release and method |
| 08/07/2002 | CN1362379A Ozone oxidizing method of processing water |
| 08/06/2002 | US6428709 Supplying fluid including removables to first filter, depositing removables on filter surface to form second filter, filtering removables by supplying fluid to filter, applying external force to constituents of second filter to refresh it |