| Patents for C02F 9 - Multistep treatment of water, waste water or sewage (41,429) |
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| 10/28/1993 | CA2133707A1 Method of reducing the level of contaminant materials in produced subterranean reservoir fluids |
| 10/28/1993 | CA2117804A1 Method for automatic washing of vehicles |
| 10/27/1993 | EP0413813B1 Devices for treating human or animal dejections by means of micro-waves |
| 10/27/1993 | CN1077698A Process and apparatus for treating marsh gas digest |
| 10/27/1993 | CN1077697A Process for sewage disposal from wool dyeing and printing by electrolyzation-catalytic oxidation |
| 10/26/1993 | US5256313 System and process for treatment of cyanide-containing waste |
| 10/26/1993 | US5256308 Curing catalyst selected from sulfonic acids, phosphoric acid esters, acetic acid; crosslinking paint, filtering cured particles |
| 10/26/1993 | US5256307 Adding flocculating agent and halide which reduces ozone, while continuously measuring redox potential |
| 10/26/1993 | US5256306 Continuous treatment of chromium bearing waste water |
| 10/26/1993 | US5256299 Method and apparatus for liquid treatment |
| 10/26/1993 | US5256263 A boat comprising electrolyzing device including electrode plates, a cage and coagulant pouring device including a pipe with pouring nozzles, a tank; water pollution control |
| 10/20/1993 | EP0566122A2 In-situ restoration of contaminated soils and groundwater |
| 10/20/1993 | EP0514453B1 Treatment of wastewater |
| 10/20/1993 | EP0486578B1 Process for purifying and processing contaminated materials |
| 10/19/1993 | US5254246 Water reclamation system |
| 10/19/1993 | US5254245 Multi-stage anaerobic packed column reactor with fixed-film column filter |
| 10/18/1993 | CA2072835A1 Water treatment method and apparatus therefor |
| 10/17/1993 | CA2094092A1 In-situ restoration of contaminated soils and groundwater |
| 10/14/1993 | WO1993020013A1 Water compositions |
| 10/14/1993 | WO1993020011A1 Removal of mercury from han solutions |
| 10/14/1993 | CA2110066A1 Water compositions |
| 10/13/1993 | EP0474754B1 A method for the forced anaerobic decomposition of waste material |
| 10/13/1993 | EP0377603B1 Clarification process |
| 10/13/1993 | CN1077179A Alkaline straw pulp paper black liquid and middle section treatment of sewage technology thereof |
| 10/12/1993 | US5252202 Muddy and waste water treatment device and method |
| 10/11/1993 | EP0575359A4 Purification of waste streams. |
| 10/06/1993 | EP0564443A1 Treatment of bleach plant filtrates |
| 10/06/1993 | EP0563669A1 A method of treatment of a fluid containing volatile organic halogenated compounds |
| 10/06/1993 | EP0563097A1 Processing waste solidification. |
| 10/05/1993 | US5250183 Degassing, evaporation of carbon dioxide, then reverse osmosis for removal of scale forming ions |
| 10/05/1993 | US5250177 Water purifier with an ozone generating device |
| 10/01/1993 | CA2064402A1 Flat bed reactor for biological cleaning of solids contaminated with toxic substances |
| 09/30/1993 | WO1993019011A1 A method of treating liquid effluents containing organic compounds |
| 09/30/1993 | WO1993019009A1 Method and apparatus for purifying waste water |
| 09/29/1993 | EP0563027A2 Water treatment apparatus |
| 09/29/1993 | EP0562321A1 Oil separator with integrated micro-filtration device |
| 09/28/1993 | CA1322519C Method of cleaning exhaust gas of drying plants and an apparatus for implementing such method |
| 09/26/1993 | CA2091740A1 A method of treatment of a fluid containing volatile organic halogenated compounds |
| 09/23/1993 | DE4209180A1 Heavy metal recovery - by adding organic degrading reduction agent to contaminated watery waste, for redn. into free metal for physical sepn. |
| 09/22/1993 | EP0561458A1 Process and apparatus for the purification of water |
| 09/22/1993 | EP0560877A1 Method and apparatus to detoxify aqueous based hazardous waste |
| 09/21/1993 | US5246598 Destruction of cyanide and other pollutants in aqueous solutions |
| 09/21/1993 | US5246586 Apparatus and method for producing ultrapure water and method of controlling the apparatus |
| 09/16/1993 | WO1993017725A1 Treatment of liquid on demand |
| 09/16/1993 | DE4207560A1 Simultaneous removal of carbonate and denitrification of water - using calcium hydroxide as precipitant and biomass, supported on pptd. calcium carbonate, as denitrifying agent |
| 09/14/1993 | US5245111 Method and apparatus for treatment of liquid photographic processing wastes |
| 09/14/1993 | US5244579 Transportable reverse osmosis water purification unit |
| 09/08/1993 | EP0558568A1 A method for treating an organic substance |
| 09/07/1993 | US5242503 Method of restoring contaminated solids using ion exchange powder contact |
| 09/07/1993 | CA1321955C Water repurification method of city water and its equipment |
| 09/07/1993 | CA1321954C Water treatment apparatus |
| 09/02/1993 | WO1993016962A1 Apparatus for the purification of cyanide-containing waste water |
| 09/02/1993 | DE4206206A1 Waste paper recycling - uses electrolyte and foaming to develop a flocculant to remove dirt as a scum from the surface of processing water |
| 09/02/1993 | DE4205905A1 Problem liq. waste disposal - by pretreatment using flocking or precipitation or adsorption before micro-or ultra-filtration |
| 09/02/1993 | CA2157035A1 Apparatus for the purification of cyanide containing waste water |
| 08/31/1993 | US5241045 Process for the precipitation of aqueous plastics dispersions containing polyvinyl alcohol |
| 08/31/1993 | US5240597 Waste water treatment equipment |
| 08/25/1993 | EP0557112A1 Chlorine free bleaching and pulping process |
| 08/25/1993 | CN2140901Y Series combined device for treatment of waste water |
| 08/24/1993 | US5238663 Nickel recovery process |
| 08/24/1993 | US5238581 Oxidative removal of cyanide from aqueous streams abetted by ultraviolet irradiation |
| 08/24/1993 | US5238580 Method for treating landfill leachate |
| 08/24/1993 | US5238578 Combining liquid containing solvent and nonvolatile impurities with vapor to produce precipitaed sludge |
| 08/22/1993 | CA2089516A1 Chlorine free pulping and bleaching sequence |
| 08/19/1993 | WO1993016001A1 Ozone generator having an electrode formed of a mass of helical windings and associated method |
| 08/19/1993 | DE4204870A1 Disposing of soil or water loaded with arsenic - by passing soln. through anion exchange resin, eluting resin to recover arsenic, sepg. arsenic from eluate and regenerating resin |
| 08/19/1993 | CA2129848A1 Ozone generator having an electrode formed of a mass of helical windings and associated method |
| 08/18/1993 | EP0555996A2 Methods and apparatus for treating aqueous indutrial effluent |
| 08/17/1993 | US5236595 Method and apparatus for filtration with plural ultraviolet treatment stages |
| 08/17/1993 | US5236583 High-pressure/vacuum operated apparatus for sewage and mud disposal |
| 08/17/1993 | US5236557 Acidifying, stripping, alkalinzing, stripping again |
| 08/17/1993 | CA1321429C Process for the removal of cyanide and other impurities from solution |
| 08/10/1993 | US5234545 Process for regenerating wastepaper in the presence of hydroxysulfonate salts |
| 08/10/1993 | US5234483 Negative pressure sanitary installation equipped with a purifier of gaseous fluids |
| 08/05/1993 | WO1993015025A1 Granulating method by aerobic biological treatment of organic waste water and aerobic biological treatment method for organic waste water |
| 08/05/1993 | WO1993015022A1 Apparatus for generating electrolytic water |
| 08/05/1993 | WO1993015021A1 Dissolved air flotation |
| 08/04/1993 | EP0553149A1 Apparatus and method for hydrolysis of cyanide-containing liquids. |
| 08/04/1993 | EP0553138A1 Use of polyether-chain-containing compounds produced from epoxidised carboxylic acid derivatives for removing printing inks from waste paper and/or paper circuit water. |
| 08/04/1993 | EP0534985A4 Water purification system with filter cleaning mechanism |
| 08/04/1993 | EP0478583B1 Process and device for treating polluted fluids |
| 08/04/1993 | CN1074886A Process for recovery of high concentration salts-contg. waste water |
| 07/29/1993 | DE4135368A1 Incinerator filter dust - is sieved to give a coarse fraction with low neutral salts and heavy metal cpd. content to reduce vol. for special disposal |
| 07/27/1993 | US5230808 Liquid suspension of polyethylene oxide for use in treating paper and pulp wastewater |
| 07/27/1993 | US5230803 Biodegradation, membrane separation, adsorption |
| 07/22/1993 | DE4201166A1 Simultaneous treatment of organic waste prods., e.g. sewage - by subjecting streams of coarse prod. free waste to hydrolysing rotting, densifying and composting |
| 07/22/1993 | DE4200849A1 Conditioning of rinse water from chemical and/or electrolytic surface treatment - includes passing rinse water from 1st tank of multistage rinse to electrodialysis unit and concentrate to treatment bath via selective ion exchanger and/or evaporator |
| 07/21/1993 | EP0551978A2 Ground contamination remediation process and apparatus |
| 07/21/1993 | EP0551761A1 Effluent treatment apparatus |
| 07/14/1993 | EP0550967A1 Removal of mercury from waste streams |
| 07/14/1993 | EP0550948A1 Process for treatment of wastewater containing ammonium compounds |
| 07/14/1993 | CN1074199A Circulating sludge method for integrating water supply with drainage channels |
| 07/14/1993 | CN1074198A Permanent magnet separation facility for treating waste water of iron and steel plant |
| 07/13/1993 | US5227136 Bioslurry reactor for treatment of slurries containing minerals, soils and sludges |
| 07/13/1993 | US5227053 Water purification system |
| 07/13/1993 | CA1320288C Detoxification of waste water from dithiocarbamate manufacture |
| 07/07/1993 | CA2070363A1 Process for treatment of wastewater containing inorganic ammonium salts |
| 07/06/1993 | US5225054 Method for the recovery of cyanide from solutions |
| 06/30/1993 | EP0548757A1 Multi-cell transportable bioslurry reactor |
| 06/30/1993 | EP0548107A1 Effluent treatment. |