| Patents for C02F 1 - Treatment of water, waste water, or sewage (145,124) |
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| 03/20/1991 | EP0417506A1 Electrodeionization and ultraviolet light treatment method for purifying water |
| 03/20/1991 | EP0417367A1 Buoyant coarse media flocculator |
| 03/20/1991 | EP0417342A1 De-aeration of water |
| 03/20/1991 | EP0417185A1 A process for removing nitrogen compounds from raw water. |
| 03/20/1991 | EP0417144A1 Biocidal composition |
| 03/20/1991 | EP0417098A1 Method of sewage treatment. |
| 03/20/1991 | CN2073410U Water magnetizing device |
| 03/20/1991 | CN1050015A Technology of recovery of acetic acid from industrial organic waste water containing acetic acid |
| 03/20/1991 | CN1050012A Process for treating waste water |
| 03/19/1991 | US5000860 Method for dewatering alum sludge |
| 03/19/1991 | US5000859 Process for sodium sulfide/ferrous sulfate treatment of hexavalent chromium and other heavy metals |
| 03/19/1991 | US5000858 Method for removing hexavalent chromium from water |
| 03/19/1991 | US5000853 Process for the improved separation of clarified liquid from biomass in the biological treatment of sewage |
| 03/19/1991 | US5000852 Removal of metal ions from solutions |
| 03/19/1991 | US5000844 Device for injecting additive products into a liquid |
| 03/19/1991 | US5000843 Culture fluid concentrator |
| 03/19/1991 | US5000821 Apparatus for controlling solid particle flow in an evaporator |
| 03/19/1991 | US4999857 Toilet sewage treatment unit |
| 03/19/1991 | CA2023006A1 Biofilm control |
| 03/14/1991 | DE4026320A1 Verfahren zur reinigung und aufbereitung von verunreinigtem gut Process for cleaning and treatment of contaminated well |
| 03/14/1991 | DE3929634A1 Removing hydrocyanic acid and cyanide(s) from water - by introduction of aldehyde, conversion to nitrile and oxidn. to acid |
| 03/13/1991 | EP0416969A1 New water-in-oil emulsions and their use for removing hydrogen sulfide |
| 03/13/1991 | EP0416312A2 Method of continuously removing and obtaining ethylene diamine tetraacetic acid (EDTA) from the process water of electroless copper plating |
| 03/13/1991 | EP0416272A1 Formed organosiloxanaminpolycondensates, process for their preparation and their use |
| 03/13/1991 | EP0416271A2 Aminoalkyl substituted organopolysiloxane-thiourea derivatives, process for preparing these and their use |
| 03/13/1991 | EP0415921A1 Water treatment aggregate |
| 03/13/1991 | EP0375739A4 Water clarification system adapted for removing particulate matter of greater than a predetermined size |
| 03/13/1991 | CN2072970U Reciperocating high efficiency magnetized water funnel |
| 03/13/1991 | CN2072969U Water-magnetizing apparatus |
| 03/13/1991 | CN1049832A Device and method for removing nitrogen compounds from liquid |
| 03/13/1991 | CA2021099A1 Treated silica for oil absorption |
| 03/12/1991 | US4999202 Humic acid derived from oxidized coal |
| 03/12/1991 | US4999116 Waste water treatment method |
| 03/12/1991 | US4999115 Treating waste from coal processing, flocculation, clarification |
| 03/12/1991 | US4999114 Method of treating spent dryfilm stripping and developing solutions with a chemical mixture |
| 03/12/1991 | US4999109 Filtering lid with separate inlet and outlet compartments |
| 03/12/1991 | US4999106 Apparatus for magnetically conditioning a liquid |
| 03/12/1991 | US4998417 Icemaker system with wide range condensing temperatures |
| 03/12/1991 | CA2024994A1 Method for removal of dioxin generated in waste combustion |
| 03/12/1991 | CA2024939A1 Device for the continuous release of vitamin a in drinking water |
| 03/12/1991 | CA1281442C Process for water treatment |
| 03/12/1991 | CA1281296C Filtering system |
| 03/12/1991 | CA1281251C Composition for precipitating dirt and other contaminants from wash water and method of cleaning |
| 03/07/1991 | WO1991002964A1 Treatment of alkaline streams |
| 03/07/1991 | WO1991002935A1 Improvements in disinfecting evaporative air conditioning plant |
| 03/07/1991 | WO1991002701A1 Photoenhanced anaerobic digestion of organic acids |
| 03/07/1991 | WO1991002699A1 Microwave method |
| 03/07/1991 | WO1991002565A1 Process for purifying and processing contaminated materials |
| 03/07/1991 | DE4025740A1 Improving mechanical sepn. of solids in communal waste water treatment - by treating water with flocculating agent in an agitated pressure vessel and conveying by pressurised gas supply to filter press separator |
| 03/07/1991 | DE3929271A1 Device for further purificn. of treated waste water - water from isolated sewage treatment units is cleaned in a biological reaction vessel with internal post-clarifying buffer |
| 03/06/1991 | EP0415482A1 Membrane electrolysis apparatus and method of removing metal ions using such apparatus |
| 03/06/1991 | EP0415403A1 Improved sewage sludge treatment with gas injection |
| 03/06/1991 | EP0415127A1 Process for the treatment of turbid waste waters |
| 03/06/1991 | EP0415119A2 Process for continuously removing and recovering complexing compounds from process water |
| 03/06/1991 | EP0415079A1 Formed organosiloxanaminpolycondensates, process for their preparation and their use |
| 03/06/1991 | EP0245406B1 Process and device for distilling fresh water from sea-water |
| 03/06/1991 | CN2072534U Electronic water treatment unit |
| 03/06/1991 | CN1049643A Method and equipment for desalination of sea water by natural energy |
| 03/06/1991 | CN1049615A Indoor water purification equipment |
| 03/06/1991 | CN1011885B Two-stage coagulation for wastewater treatment |
| 03/06/1991 | CN1011884B Flocculant for water treatment |
| 03/06/1991 | CA2024028A1 Water-in-oil emulsions and their use in the elimination of hydrogen sulphide |
| 03/05/1991 | US4998228 Drinking water filter |
| 03/05/1991 | US4997576 Materials and methods for photocatalyzing oxidation of organic compounds on water |
| 03/05/1991 | US4997573 Flocculation |
| 03/05/1991 | US4997572 High rate method for alkaline stabilization, beneficiating and pelletizing of wastewater treatment plant sludges |
| 03/05/1991 | US4997571 Method of treating water |
| 03/05/1991 | US4997563 Water treatment cartridge with foam and granular material |
| 03/05/1991 | US4997540 In-pool convection saltwater chlorinator |
| 02/28/1991 | DE3937593C1 Aerobic microbial purificn. of contaminated underground water - by drawing up through boreholes, super-saturating with oxygen and additives, feeding to bio-reactor, etc. |
| 02/28/1991 | DE3928074A1 Storage system reducing risk of legionella in hot water systems - in which water circulates continuously from storage tank to water heater and mixing of waters of different temps. is prevented |
| 02/28/1991 | DE3927346A1 Mobile system for treatment of liq. waste e.g. animal slurry, etc. - in which slurry is treated by vortex-forming nozzles in arrangement of small tanks connected to form treatment units |
| 02/27/1991 | EP0414653A1 Method of disposing of wastes containing heavy metal compounds |
| 02/27/1991 | EP0414382A1 Oil spill cleanup compositions |
| 02/27/1991 | EP0413981A1 Dinatriumsalt of the trimercapto-s-triazine-hexahydrate, method for its preparation and its use |
| 02/27/1991 | EP0413858A1 Method of treating dilute aqueous solution |
| 02/27/1991 | EP0413813A1 Devices for treating human or animal dejections by means of micro-waves. |
| 02/26/1991 | US4996232 Composition of ascorbic acid, maleic/tartaric acid, sodium/ calcium saccharin and sodium benzoate or benzoic acid |
| 02/26/1991 | US4995987 Enhancement of the efficacy of antimicrobials by the addition of anions capable of interfering with microbial electrochemical reactions |
| 02/26/1991 | US4995986 Wastewater treatment using magnesium silicate |
| 02/26/1991 | US4995984 Supported heteropolycyclic compounds in the separation and removal of late transition metals |
| 02/26/1991 | US4995983 Membrane separation process |
| 02/26/1991 | US4995981 Process for anaerobically degrading highly loaded process waste waters |
| 02/26/1991 | US4995976 Water purification straw |
| 02/26/1991 | US4995975 Apparatus used for water treatment and improvement of drinking water |
| 02/26/1991 | US4995916 Solubilizing phenolic filter in aqueous solution of nitric acid, separating filter from housing |
| 02/26/1991 | US4995425 Magnetic fluid conditioner |
| 02/26/1991 | US4995123 For sanitizing swimming pool water |
| 02/26/1991 | CA1280584C Compositions and method for neutralization and solidification of hazardous acid spills |
| 02/26/1991 | CA1280583C Compositions and method for neutralization and solidification of hazardous alkali spills |
| 02/22/1991 | WO1991003041A1 Treatment method for emulsified petroleum wastes |
| 02/22/1991 | CA2023597A1 Method of disposing of wastes containing heavy metal compounds |
| 02/21/1991 | WO1991002041A1 Sheetlike oil-adsorbent material and production thereof |
| 02/21/1991 | WO1991002011A1 Phosphonomethylated polyvinyl amines, process for preparing them and their use |
| 02/21/1991 | WO1991001944A1 Process and apparatus for recycling food processing water |
| 02/21/1991 | WO1991001943A1 Combined structure for drainage and/or partial or complete purification of flowing liquids, in particular waste water and/or rain water, and waste water clarification reactor |
| 02/21/1991 | WO1991001794A1 Process for removing volatile organic compounds from air streams |
| 02/21/1991 | WO1991001786A1 Leak-proof water processing unit |
| 02/21/1991 | WO1990015027A3 Methods for removing substances from aqueous solutions |
| 02/21/1991 | DE4024191A1 Concrete oil-water sepn. container with end bulges - holding integral inlet and outlet bores respectively for raw and treated water |