| Patents for C02F 9 - Multistep treatment of water, waste water or sewage (41,429) |
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| 06/11/1997 | CN2255978Y Waste water treating and purifying tank for restaurant |
| 06/11/1997 | CN2255977Y Multifunctional iodine supplying water purifier |
| 06/10/1997 | US5637221 Removing contaminants by combination of settling, flotation, flocculation, biological conversion to produce treated wastewater which can be recycled or safely disposed of in municipal sewer |
| 06/10/1997 | US5637212 Dry cleaning waste water treatment machine having recirculating arrangement |
| 06/05/1997 | WO1997019896A1 Liquid sterilisation apparatus |
| 06/05/1997 | CA2226294A1 Liquid sterilisation apparatus |
| 06/04/1997 | EP0586645B1 A method of treating liquid effluents containing organic compounds |
| 06/03/1997 | US5635076 Treatment process for acrylonitrile plant wastewater streams |
| 06/03/1997 | US5635053 Method and apparatus for cleaning electronic parts |
| 05/28/1997 | EP0775514A1 Method for treating exhaust gases and foul water |
| 05/28/1997 | EP0775165A1 Dadmac/vinyl trialkoxysilane copolymers and their use in wastewater treatment |
| 05/28/1997 | CN1150578A Process for recovering alkali by red mud waste liquid film method |
| 05/27/1997 | US5633423 Iron, cobalt and aluminum containing alloy |
| 05/27/1997 | US5632901 Process for the elimination of heavy metals |
| 05/27/1997 | CA2031997C Water treatment installation for a tangential filtration loop |
| 05/22/1997 | DE19542858A1 Solid separation in absorbent circuits |
| 05/21/1997 | EP0651730B1 Method and apparatus for controlling microorganisms |
| 05/21/1997 | CN1150128A Paper-mill waste water treatment technique |
| 05/21/1997 | CN1150126A Method of and system for disposing sewage and waste water through thermal oxidation |
| 05/15/1997 | WO1997017297A1 An apparatus for cleaning water |
| 05/15/1997 | DE19542360A1 Precipitating free and complex bonded silver from waste and photographic processing solutions |
| 05/15/1997 | DE19541950A1 Waste collection pump tanker vehicle |
| 05/14/1997 | EP0773192A1 Selenium containing sewage treatment process and apparatus |
| 05/14/1997 | CN2254080Y Terminal purifying water saver |
| 05/13/1997 | US5628897 Heated filter chamber with supporting collection chamber |
| 05/13/1997 | US5628895 Closed circuit for treating drinking water with UV treatment and filtering |
| 05/07/1997 | CN2253740Y High-efficient water purifier |
| 05/06/1997 | US5626748 Liquid separator |
| 05/02/1997 | EP0770039A1 Decontamination system with improved components |
| 05/02/1997 | EP0770038A1 Transportable device for preparing drinking water |
| 05/02/1997 | EP0700365A4 Method for recovering metals from solutions |
| 05/01/1997 | CA2161864A1 Regeneration of used cleaning solution |
| 04/29/1997 | US5624569 Recycled paper, using silicon-containing polyelectrolyte polymer coagulant |
| 04/29/1997 | US5624552 In-ground water treatment system |
| 04/24/1997 | WO1997014659A1 Method for pretreating raw water |
| 04/24/1997 | WO1997014658A1 Cyanide containing effluent purification process |
| 04/24/1997 | WO1997011908A3 Process and device for treating water contaminated with micro-organisms and/or harmful pollutants |
| 04/16/1997 | EP0767825A1 Alkaline diamine track lubricants |
| 04/16/1997 | EP0739312A4 Bottle water disinfection system |
| 04/16/1997 | EP0656966B1 Method of treating process water |
| 04/15/1997 | US5620893 Microbial mediated method for soil and water treatment |
| 04/10/1997 | WO1997013042A1 Sanitary water apparatus with filtering apparatus for fibers, in particular asbestos fibers |
| 04/10/1997 | WO1997012947A1 Cleaning compositions for oil and gas wells, lines, casings, formations and equipment and methods of use |
| 04/10/1997 | DE19545660C1 Removing heavy metals from waste water using ferri- or ferromagnetic particles |
| 04/10/1997 | DE19536585A1 Removal of heavy metal ions from effluent water generated by e.g. galvanising plant |
| 04/09/1997 | EP0766648A1 Process for treatment of a fluid and apparatus therefor |
| 04/09/1997 | CN1146977A Water treatment method and apparatus for treating waste water by using ion exchange resin |
| 04/08/1997 | US5618439 Method for purifying industrial sewage water |
| 04/03/1997 | WO1997011908A2 Process and device for treating water contaminated with micro-organisms and/or harmful pollutants |
| 04/01/1997 | US5616240 Device for sewage clarification |
| 04/01/1997 | US5616221 Electrolytic ionized water producing apparatus |
| 03/27/1997 | DE19638414A1 Treating waste water |
| 03/26/1997 | EP0764613A2 Process and plant for purification of municipal and domestic waste water |
| 03/26/1997 | EP0696259A4 Process and apparatus for the treatment of waste water |
| 03/26/1997 | CN2250355Y Portable pure water supply device |
| 03/26/1997 | CN2250354Y Household water purifying device |
| 03/26/1997 | CN2250353Y Pressure water supply tank |
| 03/25/1997 | US5614411 Self contained decontamination system |
| 03/25/1997 | US5614102 Method for purifying sewage |
| 03/25/1997 | US5614088 Cleaning water production system |
| 03/25/1997 | US5614068 Water purifier |
| 03/20/1997 | DE19603884C1 Water treatment unit to produce filtered potable water |
| 03/19/1997 | CN1145612A Process for the treatment of wast water containing organic and inorganic compunds |
| 03/18/1997 | US5613239 Method and apparatus for decomposing organic solutions composed of chelating solutions and/or organic acids containing radioactive metal ions and collection method and apparatus using the same |
| 03/18/1997 | US5611921 Sewage dewatering process and equipment |
| 03/18/1997 | US5611920 Biocide treatment system and method |
| 03/12/1997 | EP0761610A2 Process and plant for the production of industrial water from waste water |
| 03/12/1997 | EP0761603A1 Method and apparatus for waste water treatment after polishing semiconductor wafers |
| 03/12/1997 | CN1144781A Harnessing method for papermaking waste water |
| 03/11/1997 | US5609769 Water treatment methods |
| 03/06/1997 | DE19630370A1 Recovering metals from biodegradable organic material e.g. oil-contaminated grinding wastes |
| 03/05/1997 | EP0759889A1 Process for valorizing a liquid acid effluent containing heavy metals |
| 03/05/1997 | CN1144198A Life waste water recovery purifying water supply method and process for converting sewage, refuse into fertilizer |
| 03/05/1997 | CN1144196A Biological cell purifying equipment and method |
| 03/04/1997 | US5607593 Installation for making water potable with submerged filtering membranes |
| 02/27/1997 | WO1997007064A1 Magnetic separation |
| 02/27/1997 | CA2229584A1 Magnetic separation |
| 02/26/1997 | CN2248190Y High grade treating device for drinking water |
| 02/26/1997 | CN1143614A Micro-eddy low-impulse small water supplying purifying technique and equipment |
| 02/25/1997 | US5605634 Insertion nutrients |
| 02/20/1997 | WO1997006108A1 Portable water sterilizer |
| 02/20/1997 | DE19530086A1 Treatment of surface or waste water |
| 02/20/1997 | CA2201706A1 Portable water sterilizer |
| 02/19/1997 | EP0758627A2 Water treating method and apparatus treating waste water by using ion exchange resin |
| 02/18/1997 | CA2089097C Removal of aox from bleach plant mill effluents by ph shift using the alkalinity/acidity sources available at the mill |
| 02/13/1997 | WO1997005071A1 Process for the biological decontamination of contaminated material |
| 02/13/1997 | WO1997005068A1 Method for removing heavy metals from liquid effluents |
| 02/13/1997 | WO1997005066A1 Water purification system |
| 02/12/1997 | EP0757586A1 Improvements in electrodialysis including filled cell electrodialysis (electrodeionization) |
| 02/12/1997 | CN1142468A Production of rich oxygen content drinking water |
| 02/05/1997 | EP0756582A1 Destroying metal cyanide complexes by combined chemical oxidation and electrolysis |
| 02/05/1997 | CN1141888A Method for treatment of waste acid liquid containing copper production of gluside and sodium saccharin |
| 02/04/1997 | US5599455 Passing hard water through an ion exchange resin and a powder mixture of tourmaline and a metal; laundering; waste water treatment; water supply systems |
| 02/04/1997 | US5599454 Water purification by exposure to fines of copper-zinc alloys to kill or inhibit bacteria |
| 01/30/1997 | WO1997002906A1 Process for the recovery of heavy metals such as lead from metal contaminated soil |
| 01/30/1997 | CA2223052A1 Process for the recovery of heavy metals such as lead from metal contaminated soil |
| 01/29/1997 | EP0755730A1 Method for decontaminating soils and waste containing iron oxides and heavy metals |
| 01/29/1997 | EP0664771B1 Process for treating industrial waste waters with low concentrations of toxic organic pollutants |
| 01/28/1997 | US5597490 Flocculation |
| 01/28/1997 | US5597482 Water purification apparatus |