| Patents for C02F 1 - Treatment of water, waste water, or sewage (145,124) |
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| 01/25/1991 | CA2021780A1 Spirogyra controlling and deodorant composition |
| 01/24/1991 | WO1991000849A1 Process for treatment of water and apparatus therefor |
| 01/24/1991 | DE3923514A1 Rotary reactor for two insol. liq. phases - with inner and outer chambers and jacket of porous material |
| 01/24/1991 | DE3923299A1 Water purification to remove organic contaminants - by filtering using rubber particles as filtration medium |
| 01/23/1991 | EP0409491A2 Magnetic treatment of water used for agricultural purposes |
| 01/23/1991 | EP0409423A1 Treatment for reducing impurities in aqueous liquor |
| 01/23/1991 | EP0409140A1 Method for removing hexavalent chromium from water |
| 01/23/1991 | EP0408984A1 Method of and apparatus for the physical treatment of streaming hard water |
| 01/23/1991 | EP0408937A1 Process for removing heavy metals from waste water |
| 01/23/1991 | EP0408878A1 Enhanced phosphate removal in an activated sludge wastewater treatment process |
| 01/23/1991 | EP0323482B1 Process for purifying polluted materials and use of the product thus obtained |
| 01/23/1991 | CN2069863U Chlorine dioxide codisinfectant generator |
| 01/23/1991 | CN2069855U Remover for incrustation scale |
| 01/23/1991 | CN2069854U Fixed oil suction |
| 01/23/1991 | CN2069853U Multi-functional direct treater of drinking water |
| 01/23/1991 | CN2069852U Free-flowing seawater desalter |
| 01/23/1991 | CN1048692A Process for treatment of waste electroplating solution |
| 01/23/1991 | CN1048691A Electronic device for fertilizing fresh water |
| 01/23/1991 | CN1048690A Removal of trace contamination from water |
| 01/23/1991 | CN1048689A 便携式水净化系统 Portable water purification system |
| 01/23/1991 | CN1048664A Process for preparation of chlorine-resistant polyester semipermeable membranes |
| 01/22/1991 | WO1991001392A1 Method of removing ions |
| 01/22/1991 | US4986917 Selective recovery of a nitrophenolic by-product from nitration waste water by extraction |
| 01/22/1991 | US4986906 Erodible copper anode, microbiocides |
| 01/22/1991 | US4986903 Induced static single flotation cell |
| 01/22/1991 | US4986902 Chlorination system for a water to be treated |
| 01/22/1991 | US4986901 Bottled water cap with indicator and adaptor |
| 01/22/1991 | US4986296 Prevention of freezing of liquid stream |
| 01/22/1991 | CA2064224A1 Method of removing ions |
| 01/22/1991 | CA1279412C Water clarification |
| 01/22/1991 | CA1279292C Helical flow effluent weir |
| 01/22/1991 | CA1279271C Cross-flow filtration |
| 01/21/1991 | WO1991001356A1 Method for cleaning up liquids, absorbent pellets for use in such method, and method for making such pellets |
| 01/21/1991 | CA2064251A1 Method for cleaning up liquids, absorbent pellets for use in such method, and method for making such pellets |
| 01/20/1991 | CA2020834A1 Treatment for reducing inpurities in aqueous liquor |
| 01/18/1991 | CA2021364A1 Method and system for removing hexavalent chromium from water |
| 01/17/1991 | DE4019630A1 Device for removing or preventing formation of scale in pipe systems |
| 01/17/1991 | DE3922298A1 Dewatering municipal or industrial sewage sludge - with addn. of sludge from cellulose or paper mfr. and synthetic organic flocculant |
| 01/16/1991 | EP0408366A2 Wastewater treatment process with an ozone contactor |
| 01/16/1991 | EP0408360A2 Apparatus for dissolving particulate solids in liquids |
| 01/16/1991 | EP0408292A2 Vinyl copolymer and adsorbent for microorganisms |
| 01/16/1991 | EP0408229A1 Apparatus producing continuously electrolyzed water |
| 01/16/1991 | EP0407597A1 Treatment of activated sludge |
| 01/16/1991 | EP0407495A1 A device for irradiating flowing liquids and/or gases with ultraviolet light. |
| 01/16/1991 | CN2069412U Drinking water purifier by use of paramagnetic high-gradient magnetic separation |
| 01/16/1991 | CN2069411U Soft water treatment device with saline liquid jetting device |
| 01/16/1991 | CN2069230U Healthy cup tray |
| 01/16/1991 | CN1048566A Disposal method of tailings water contained cn for a chlorinated gold extracting shop |
| 01/16/1991 | CN1048533A Water treatment process |
| 01/16/1991 | CN1048532A Method for treating low turbidity waste sewage |
| 01/15/1991 | US4985150 Removal of metal ions and microorganisms |
| 01/15/1991 | US4985122 Vacuum distillation apparatus and method with pretreatment |
| 01/15/1991 | US4985118 Method for treating photographic process waste liquor through concentration by evaporation |
| 01/15/1991 | US4984593 Method and apparatus for cleaning freight containers as well as for treating and circulating the fluids used |
| 01/15/1991 | CA1279131C Oxidation process for substances dissolved or suspended in an aqueous medium |
| 01/14/1991 | CA2020949A1 Wastewater treatment process with an ozone contactor |
| 01/10/1991 | WO1991000250A1 Device for flotation treatment of sewage |
| 01/10/1991 | WO1991000247A1 Fluid treater and method of stopping the same |
| 01/10/1991 | WO1991000138A1 Cleaning composition, oil dispersant and use thereof |
| 01/10/1991 | WO1991000130A1 Water distilling method and apparatus |
| 01/10/1991 | WO1991000011A1 Anti-microbial method and article |
| 01/10/1991 | DE4007351A1 Separate water circuits for domestic buildings - for wide range of consumption and therapeutic demands |
| 01/09/1991 | EP0406999A1 Method of treating low-concentration turbid water |
| 01/09/1991 | EP0406846A2 Environmentally safe method for the removal of residual polyethers from aqueous waste streams |
| 01/09/1991 | EP0406733A2 Method for removing halogenated organic compounds from waste water |
| 01/09/1991 | EP0406674A1 Ion exchange device for water treatment, process for its fabrication and its use for removing nitrites and/or nitrates from water |
| 01/09/1991 | EP0406622A2 Scale removal and prevention device |
| 01/09/1991 | EP0406406A1 Process for preparing basic aluminum compounds. |
| 01/09/1991 | EP0406389A1 Method and device for separating mercury from an aqueous medium |
| 01/09/1991 | CN2068965U Intensive magnetizing cup of narrow whirlpool |
| 01/09/1991 | CN1048399A Highly concentrated aqeous suspension of minerals and/or fillers and/or pigments |
| 01/09/1991 | CN1048371A Process of removing fluorine from water of high fluorine content |
| 01/08/1991 | WO1991000778A1 Ion exchange device for purifying water, process for manufacturing it and its use for removing nitrates and/or nitrites from water |
| 01/08/1991 | US4983698 Flocculants; produced from acrylamide, quaternary dialkylaminoalkyl acrylate monomers, and a waste stream which is the result of the transesterification reaction used to produce the cationic monomer |
| 01/08/1991 | US4983409 Ion water for production of foods and beverages |
| 01/08/1991 | US4983307 Method for sterilizing liquids by ultraviolet radiation |
| 01/08/1991 | US4983306 Method of treating waste water |
| 01/08/1991 | US4983302 Boric acid and alkali nitrates, separating processes |
| 01/08/1991 | US4983297 Waste water treating process scheme |
| 01/08/1991 | US4983286 Multicompartment plastic bag, sterilization and filtration materials in upper compartment, funnel, lower collection compartment, portable |
| 01/08/1991 | US4983284 Heated sump assembly for a grease/oil separator |
| 01/08/1991 | US4983267 Water deionization and contaminants removal or degradation |
| 01/08/1991 | US4983265 Water treating apparatus |
| 01/08/1991 | US4983157 Centrifugation system using static layer |
| 01/08/1991 | US4982782 Method and apparatus for simultaneous heat and mass transfer |
| 01/08/1991 | CA2039147A1 Ion exchange device for purifying water, process for manufacturing it and its use for removing nitrates and/or nitrites from water |
| 01/08/1991 | CA1278687C Process for rendering harmless, dangerous chemical waste material |
| 01/06/1991 | WO1991000248A1 Process for reducing the cyanide content of a solution |
| 01/06/1991 | CA2035880A1 Process for reducing the cyanide content of a solution |
| 01/06/1991 | CA2020452A1 Environmentally safe method for the removal of residual polyethers from aqueous waste streams |
| 01/04/1991 | WO1991000249A1 Method of concentrating and dehydrating slurried sludge |
| 01/03/1991 | DE4019580A1 Device for electrochemically sepg. and removing ions from liq. - uses two electrodes to apply an electric potential across an ion exchange material, causing ions to be pptd. |
| 01/03/1991 | DE3921436A1 Oxidative removal of harmful substances from effluent water - by subjecting to biological pretreatment, oxidative treatment with air etc. and treating with ozone to cause ozone oxidn. |
| 01/03/1991 | DE3921114A1 Water distribution system for scrubbers - built into the floors of spray-painting cubicles has water inlet system which minimise sedimentation |
| 01/03/1991 | DE3920551A1 Device for cleaning heavily contaminated water - divides water flow into a number of streams so that the flow rate through and the problems involved with using larger vessels are avoided |
| 01/03/1991 | DE3920487A1 Removing mercury ion from aq. solns. - by pptn. with formamidine:sulphinic acid followed by filtration |
| 01/03/1991 | CA2014303A1 Method of treating low-concentration turbid water |
| 01/03/1991 | CA2002012A1 Method and apparatus for absorbing petroleum based products |
| 01/02/1991 | EP0406105A1 Method for treating waste water containing water-soluble ink |
| 01/02/1991 | EP0406048A1 Method and device for the injection of fluids into a flotation tank |