| Patents for C02F 9 - Multistep treatment of water, waste water or sewage (41,429) |
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| 02/21/1991 | DE3927467A1 Sepn. and detection of mixts. - by temp. gradient gel electrophoresis using either a spatial or temporal temp. gradient |
| 02/20/1991 | EP0413356A1 Process for treating waste water |
| 02/17/1991 | WO1991002698A1 Improved sewage treatment process |
| 02/17/1991 | CA2064809A1 Sewage treatment process |
| 02/14/1991 | DE3926586A1 Cleaning waste water from glass industry - using type I or II anion exchangers to remove arsenic and antimony fluoride complex ions |
| 02/13/1991 | EP0412377A2 Mobile self-contained system for on-site recovery of solvents |
| 02/13/1991 | CN1049143A Environmentally safe method for the removal of residual polyethers from aqueous waste streams |
| 02/12/1991 | US4992644 Device for sterilization, storage and dispensing of liquids |
| 02/09/1991 | WO1991001823A1 Method for treating residual lime sludge |
| 02/09/1991 | CA2060187A1 Method for treating residual lime sludge |
| 02/07/1991 | WO1991001275A1 Water treatment apparatus |
| 02/07/1991 | WO1991001172A1 Method for treatment of pulp which contains cyanides |
| 02/05/1991 | US4990260 Radiation ionization of water to produce hydroxy free radicals; decomposes organic impurities |
| 02/05/1991 | US4990031 Treatment of mine tailings |
| 01/30/1991 | EP0398968A4 Water purification system |
| 01/29/1991 | WO1991001948A1 Process, installation and reactor for biological treatment of waste water |
| 01/29/1991 | US4988448 Method for removing substances from a solution |
| 01/29/1991 | CA2059638A1 Process, installation and reactor for biological treatment of waste water |
| 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 | CN1048689A 便携式水净化系统 Portable water purification system |
| 01/22/1991 | US4986977 Recovery of useful products from by-products of phosphate conversion coating process |
| 01/20/1991 | CA2020834A1 Treatment for reducing inpurities in aqueous liquor |
| 01/18/1991 | CA2021364A1 Method and system for removing hexavalent chromium from water |
| 01/16/1991 | EP0408229A1 Apparatus producing continuously electrolyzed water |
| 01/15/1991 | WO1991001278A1 Wastewater treatment |
| 01/15/1991 | US4984593 Method and apparatus for cleaning freight containers as well as for treating and circulating the fluids used |
| 01/15/1991 | CA2036392A1 Wastewater treatment |
| 01/10/1991 | WO1991000246A1 Method for treatment of sewage containing cyanides |
| 01/10/1991 | DE4007351A1 Separate water circuits for domestic buildings - for wide range of consumption and therapeutic demands |
| 01/09/1991 | EP0406846A2 Environmentally safe method for the removal of residual polyethers from aqueous waste streams |
| 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 | US4983267 Water deionization and contaminants removal or degradation |
| 01/08/1991 | US4983265 Water treating apparatus |
| 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 |
| 01/03/1991 | 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. |
| 01/02/1991 | EP0406105A1 Method for treating waste water containing water-soluble ink |
| 01/01/1991 | US4981593 Sewage treatment |
| 12/30/1990 | CA2020069A1 Treatment process and apparatus of water-ink containing affluents |
| 12/27/1990 | EP0404276A1 Mixer reactor |
| 12/20/1990 | WO1990015778A1 Process and device for treating polluted fluids |
| 12/20/1990 | DE3919885A1 Verfahren und anlage zur behandlung von mit schadstoffen belasteten fluessigkeiten Liquids method and system for treatment of contaminated with pollutants |
| 12/19/1990 | EP0402737A2 Process and apparatus for the treatment of sludges containing heavy metals |
| 12/19/1990 | EP0402406A1 Portable water-purifying devices. |
| 12/18/1990 | US4978508 Blending with water and surfactant, reacting with ozone, illuminating with ultraviolet radiation, screening, flocculation and segmentation |
| 12/13/1990 | WO1990015031A1 A method for the forced anaerobic decomposition of waste material |
| 12/13/1990 | WO1990015027A2 Methods for removing substances from aqueous solutions |
| 12/13/1990 | WO1990015026A1 Process for reduction of hexavalent chromium |
| 12/13/1990 | DE3842226A1 Sanitary therapy device to improve vision, hearing, breathing and drinking |
| 12/13/1990 | DE3840364A1 Apparatus for water treatment in the public health area in health + environmental protection - to improve the quality of life for connection to conventional pressurised water lines containing mains water, spring water or solids-free wastewaters or in the separation of solids in food production or the like and contains a process in the public health area |
| 12/12/1990 | EP0290488A4 Treatment of waste and a rotary kiln therefor |
| 12/12/1990 | CN1047662A Method of variable constant water-cycle purification |
| 12/11/1990 | US4976870 Wash water reservoiring method |
| 12/11/1990 | US4976864 Anaerobic digestion of hydrolysed effluents |
| 12/11/1990 | US4976863 Wastewater treatment process |
| 12/05/1990 | EP0401048A1 Aqueous solution for waste water treatment |
| 12/04/1990 | US4975203 Alkaline solution; demetallization |
| 12/04/1990 | US4975193 Method for removing cyanide from a fluid |
| 12/04/1990 | US4975185 Portable water purification system |
| 11/28/1990 | EP0399035A1 Method of removing arsenic and/or other amphoteric elements from sludge and solid waste materials. |
| 11/28/1990 | EP0398968A1 Water purification system |
| 11/28/1990 | CN1010555B Management of photoresist materials containing waste solution |
| 11/23/1990 | CA2057872A1 Effluent treatment |
| 11/22/1990 | EP0398863A1 Process for recovery of metals or metal oxides and acids from salt solutions, in particular from pickling acids or pickling acid mixtures |
| 11/22/1990 | EP0397742A1 Porous article impregnation resin composition, and system for treating impregnation process waste water. |
| 11/21/1990 | CN1010472B Decolorization method of steam cooking black liquor of paper-making, ramie and refining cotton |
| 11/20/1990 | US4971775 Process for removal of nickel from effluent containing EDTA |
| 11/20/1990 | US4971703 Treatment method for emulsified petroleum wastes |
| 11/20/1990 | US4971687 Apparatus for water treatment |
| 11/15/1990 | WO1990013521A1 Method for the simultaneous transport and pasteurization of sewage sludge |
| 11/15/1990 | WO1990013520A1 Method of processing water, in particular bath water |
| 11/14/1990 | EP0396928A2 Portable water purification system |
| 11/13/1990 | US4970005 Catalysis, oxidation, purification |
| 11/13/1990 | US4969995 Removal of metal ions from aqueous solution |
| 11/13/1990 | US4969991 Water purifying and dispensing system |
| 11/10/1990 | WO1990013519A1 Method and composition for treating waste water |
| 11/10/1990 | WO1990013518A1 Water purification process |
| 11/10/1990 | CA2055480A1 Water purification process |
| 11/10/1990 | CA2054721A1 Method and composition for treating waste water |
| 11/08/1990 | CA2016176A1 Portable water purification system |
| 11/06/1990 | US4968427 Process for the biological degradation of complex, non-readily degradable organic wastewater constituents |
| 11/01/1990 | WO1990012759A1 Method of electrolytic treatment and unit therefor |
| 10/30/1990 | US4966714 Flocculation, separation of latex or synthetic resins with mixture of calcium oxide, magnesium oxides and silica |
| 10/30/1990 | US4966692 Filtration system having flow control means and tank adapter with selective venting |
| 10/25/1990 | DE3912820A1 Cleaning water - contaminated with halogenated hydrocarbon(s), esp. per-chloroethylene, by passing through sedimentation tank and activated carbon filter |
| 10/24/1990 | CN1010095B Process of treating acidic water |
| 10/23/1990 | US4964885 Reducing dew point; washing, condensating exhaust gases; continuous cycles |
| 10/23/1990 | CA1275510C Integrated biological-adsorption process for treating wastewater |
| 10/18/1990 | DE3904452A1 Mobile arrangement for treating waters, such as well water or surface water, waste water or liquid manure, ... |
| 10/17/1990 | EP0392727A1 Process for the destruction of organic waste material |
| 10/10/1990 | CN1045960A Treatment method for phenolic wastewater |
| 10/09/1990 | US4961859 Method of treating an aqueous processing waste solution of a non-silver halide light-sensitive material and a device therefor |
| 10/03/1990 | EP0390265A1 Process for purifying waste waters constituted by civil, industrial, agroalimentary, and zootechnical waste waters, and facility for practicing it |
| 10/02/1990 | US4960511 Apparatus for depleted chemical milling solutions |
| 09/25/1990 | US4959142 Water treating apparatus |
| 09/18/1990 | US4957624 Method of and arrangement for purifying contaminated water |