| Patents for C02F 1 - Treatment of water, waste water, or sewage (145,124) |
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| 03/27/1990 | US4912070 Continuously porous absorbent material possessing far infrared electromagnetic field |
| 03/27/1990 | US4911923 Water insoluble polyoxymethylene glycol |
| 03/27/1990 | US4911843 Process for removal of dissolved hydrogen sulfide and reduction of sewage BOD in sewer or other waste systems |
| 03/27/1990 | US4911835 Seawater-dissolved metal collecting system |
| 03/27/1990 | US4911758 Washing with sodium hydroxide solution, adding calcium oxide or hydroxide; distillating; heating |
| 03/27/1990 | CA1266980A1 Automated systems for introducing chemicals into water or other liquid treatment systems |
| 03/22/1990 | WO1990002838A1 Apparatus and method of treating black liquor |
| 03/22/1990 | WO1990002794A1 Thermophilic alginate lyase from bacillus stearothermophilus nrrl b-18394 |
| 03/22/1990 | WO1990002709A1 Buffered electrolysis |
| 03/22/1990 | WO1990002708A1 Method for purification of waste aqueous medium |
| 03/22/1990 | WO1990002707A1 Water treatment system |
| 03/22/1990 | WO1990002606A1 Oxidation chamber |
| 03/22/1990 | WO1990002600A1 Process and installation for recovering ammonia from flue gases |
| 03/22/1990 | DE3831811A1 Process and apparatus for controlling the regeneration of water softening units |
| 03/21/1990 | EP0359509A1 Process for the production of high molecular weight copolymers of diallyl dimethyl ammonium chloride and acrylamide in solution |
| 03/21/1990 | EP0359074A1 Process, catalyst and equipment to remove the nitrite and/or nitrate content from water |
| 03/21/1990 | EP0359025A1 Process for the mesophilic or thermophilic aerobic-enzymatic conditioning of organic substances and biomasses |
| 03/21/1990 | EP0177543B1 Process and equipment for removal of suspended material, biogenetic nutrients and dissolved metal compounds from sewage contaminated with organic and/or inorganic substances |
| 03/21/1990 | CN1040567A Method for treating chsomium-containing sewage and sludges from electroplating |
| 03/21/1990 | CN1040566A Method of preparation of composite coagulating agent |
| 03/21/1990 | CN1040512A Method of coagulating sludge |
| 03/20/1990 | US4910325 Polymerizable quaternary ammonium methyl carbonates |
| 03/20/1990 | US4910015 Surface-active polysiloxanes and drug releasing materials thereof |
| 03/20/1990 | US4909948 Above ground waste water disposal system |
| 03/20/1990 | US4909947 Process for detoxifying high aqueous content hazardous waste streams |
| 03/20/1990 | US4909944 Removal of metal ions from aqueous solution |
| 03/20/1990 | US4909942 Process for removing pyrogens |
| 03/20/1990 | US4909939 Process for solvent extraction using phosphine oxide mixtures |
| 03/20/1990 | US4909934 Filtration unit; drain lines; reservoir; controlling means |
| 03/20/1990 | US4909932 Tubular container; movable and fixed filter |
| 03/20/1990 | US4909931 Water-purifier device |
| 03/20/1990 | US4909899 Method of concentrating sludges |
| 03/15/1990 | DE3915970A1 Electrolytic oxygen from windmill power improves fish environment - with hydrogen used in auxiliary energy supply motor |
| 03/15/1990 | DE3831013A1 Process and apparatus for separating off ammonia from waste waters |
| 03/15/1990 | DE3830999A1 Bathing water treatment plant for the ozonisation of bathing water |
| 03/15/1990 | DE3830332A1 Process for removing nitrate ions from untreated water for drinking water treatment |
| 03/14/1990 | EP0358006A1 Method and apparatus for purifying waste gases from dryers |
| 03/14/1990 | EP0357761A1 Devices for treating waste water |
| 03/14/1990 | EP0167569B1 Deoxygenation process and apparatus |
| 03/14/1990 | CN2054455U Magnetic partition method multilevel sea-water desalination device |
| 03/14/1990 | CN2054454U Magnetizing water purifier |
| 03/14/1990 | CN2054453U Health care purifier for domestic drinking water |
| 03/13/1990 | US4908137 Heavy metal removal process |
| 03/13/1990 | US4908109 Electrolytic purification system utilizing rapid reverse current plating electrodes |
| 03/12/1990 | EP0355109A4 System and method for the extraction of cyanide from tails liquor. |
| 03/08/1990 | WO1990001979A1 Pool chemical dispenser |
| 03/08/1990 | WO1990001978A1 Multistage fractional freezing for superpurifying crystallizable substances |
| 03/08/1990 | WO1990001977A1 A distillation apparatus |
| 03/08/1990 | DE3829515A1 Method for treating the surfaces of workpieces in aqueous liquids |
| 03/08/1990 | DE3828825A1 Apparatus for water treatment |
| 03/08/1990 | DE3827716A1 Water treatment in a plant for intensive fish culture |
| 03/07/1990 | EP0357520A1 Fountain with a constant supply for enriching the active matter in water drawn from a well |
| 03/07/1990 | EP0357519A1 Organopolysiloxane composition containing iodide for conversion by heat into an elastomer useful in water treatment |
| 03/07/1990 | EP0357170A1 A method of treating an aqueous processing waste solution of a non-silver halide light-sensitive material and a device therefor |
| 03/07/1990 | EP0357102A2 Apparatus for treating liquid to prevent and/or remove scale deposits |
| 03/07/1990 | EP0356870A1 Method and apparatus for the biotechnological treatment of liquids in a vertical fixed bulk bed |
| 03/07/1990 | EP0356605A1 Metal precipitation and neutralisation apparatus for metal pickles containing several metals |
| 03/07/1990 | EP0282476B1 Process and device for treating an aqueous liquid |
| 03/07/1990 | EP0251840B1 Process and individual apparatus for the filtration of a liquid |
| 03/07/1990 | CN2054035U Computer controlled complete equipment for water treatment by chlorine disinfection |
| 03/07/1990 | CN1040186A Process for catalytic treatment of wastewater |
| 03/07/1990 | CN1007041B Comprehensive processing method for cyanogen-contg. waste water and so2-contg. exhaust flue gas |
| 03/06/1990 | US4906465 Antithrombogenic devices containing polysiloxanes |
| 03/06/1990 | US4906387 Method for removing oxidizable contaminants in cooling water used in conjunction with a cooling tower |
| 03/06/1990 | US4906386 Flocculation of coal fines with polyelectrolytes and electrolyte |
| 03/06/1990 | US4906385 Method for controlling macroinvertebrates |
| 03/06/1990 | US4906361 Apparatus for treating fluids |
| 03/06/1990 | US4906358 Water ozonization system |
| 03/06/1990 | US4906337 Water supply system |
| 03/06/1990 | US4906330 Process for the disposal of hardening-shop wastewaters |
| 03/06/1990 | CA1266364A1 Method for neutralizing waste sulfuric acid by adding a silicate |
| 03/01/1990 | DE3927291A1 Reverse osmosis membrane for water purificn. - is flushed free of deposits by applying pressurised raw water with very short intervals |
| 03/01/1990 | DE3829464A1 Apparatus for solar production of fresh water |
| 03/01/1990 | DE3828775A1 Process and device for dewatering sludge, in particular mud from rivers, harbours or the like |
| 03/01/1990 | DE3828755A1 Antimicrobial compounds for controlling undesired microbial growth and/or corrosion caused by microbes in water-bearing devices |
| 02/28/1990 | EP0355886A1 A process for chemical softening of water with the crystallization method in a grain reactor |
| 02/28/1990 | EP0355837A2 Transition metal recovery |
| 02/28/1990 | EP0355667A1 Process and installation for the treatment of waste water, especially originating from flue gas desulfurization |
| 02/28/1990 | EP0355452A1 Pickling acid for high-grade steel, and process for treating the spent pickling acid |
| 02/28/1990 | EP0355418A1 Process for the treatment of effluents containing cyanide and toxid metals, using hydrogen peroxide and trimercaptotriazine |
| 02/28/1990 | EP0355417A1 Process for the treatment of effluents containing cyanide and/or other oxidizable substances |
| 02/28/1990 | EP0355189A1 Process for thickening/dewatering sewage sludge |
| 02/28/1990 | EP0355113A1 Apparatus and method for separating liquids |
| 02/28/1990 | EP0355109A1 System and method for the extraction of cyanide from tails liquor |
| 02/28/1990 | CN2053625U Multifunction water purifying device |
| 02/28/1990 | CN1040016A Method and apparatus for treating waste liquor of plating |
| 02/28/1990 | CN1006981B Water purification system |
| 02/27/1990 | US4904874 Apparatus for irradiating fluids |
| 02/27/1990 | US4904393 Method for controlling overspray in paint spray booths |
| 02/27/1990 | US4904390 Cleaning the coolant of the primary loop of a pressurized water reactor by adding a redox substance to change the valence of antimony |
| 02/27/1990 | US4904388 Process for sludge thickening |
| 02/27/1990 | US4904381 Magnetization treatment apparatus of fluid |
| 02/22/1990 | WO1990001609A1 In-situ remediation system for contaminated groundwater |
| 02/22/1990 | WO1990001572A1 Waste metal extraction apparatus |
| 02/22/1990 | WO1990001464A1 Process for the catalytic treatment of wastewater |
| 02/22/1990 | WO1990001463A1 Rapidly mounted magnetic device for treating water |
| 02/22/1990 | DE3926829A1 Capsule holds chemically active materials under water - until progressive discharge enables float to overcome residual wt. |
| 02/22/1990 | DE3828229A1 Means for cleaning, disinfection and maintaining drinking water plants and beverage industry plants |
| 02/22/1990 | DE3828201A1 Apparatus for adding chemicals, preferably flocculant aids, to a main liquid stream |
| 02/22/1990 | DE3828185A1 Method and device for the germicidal treatment of aqueous or granular goods |