| Patents for C02F 9 - Multistep treatment of water, waste water or sewage (41,429) |
|---|
| 09/18/1990 | US4957200 Water distillation apparatus |
| 09/11/1990 | US4956154 Selective removal of chromium, nickel, cobalt, copper and lead cations from aqueous effluent solutions |
| 09/11/1990 | US4956098 Oxidation and photoxidation process |
| 09/10/1990 | WO1990010760A1 Method for treating human or animal dejections by means of micro-waves and devices for implementing such method |
| 09/10/1990 | CA2028099A1 Process for the microwave treatment of human or animal feces, and device for implementing said process |
| 09/05/1990 | EP0385968A2 Process for separating and recovering dissolved and precipitable metals, in particular heavy metals, from aqueous solutions |
| 09/05/1990 | EP0377603A4 Clarification process |
| 09/04/1990 | US4954265 Removal of nickel and copper |
| 09/04/1990 | US4954230 Removal of heavy metals and oxidizable contaminants electrolysis, adsorption |
| 08/29/1990 | EP0384282A1 Use of secundary and tertiary amines as Lubricant for chain Use of secondary and tertiay amines as lubricant for conveyor. |
| 08/29/1990 | EP0383765A1 Sewage treatment plant. |
| 08/24/1990 | WO1990010053A1 Lubricant and use thereof |
| 08/16/1990 | EP0382340A1 Two-stage anaerobic/aerobic wastewater treatment process |
| 08/14/1990 | US4948516 Method of disposing of wastes containing heavy metal compounds |
| 08/14/1990 | US4948489 Precipitation of heavy metal oxides; controlling water pollution |
| 08/14/1990 | US4948297 Correction method for contaminated sites |
| 08/09/1990 | WO1990008741A1 Wastewater treatment process and apparatus for wastewater treatment |
| 08/08/1990 | EP0381601A1 Flue gas purification process |
| 08/07/1990 | US4946600 Water repurification method of city water and its equipment |
| 08/07/1990 | US4946599 Apparatus and method for converting bottled water dispensers to continuous supply systems |
| 08/07/1990 | US4946574 Electrolytic cells |
| 08/06/1990 | CA2007024A1 Two-stage anaerobic/aerobic treatment process |
| 08/02/1990 | DE4002014A1 Purifying waste water, esp. from dye synthesis - by ozonisation at alkaline pH, blowing through air at acid pH, and pptn. with alkaline earth salt |
| 08/01/1990 | CA2008396A1 Processes for the purification of flue gases |
| 07/31/1990 | US4944875 Plural filter tube sequential distribution apparatus |
| 07/31/1990 | CA2007800A1 Method for removing toxic metals from agricultural drain water |
| 07/31/1990 | CA1272309A1 Process for the decolorization of pulp mill process streams |
| 07/26/1990 | WO1990007974A1 Filter apparatus |
| 07/26/1990 | DE3901812A1 Process for the waste water-free disposal of the scrubbing liquid arising in exhaust gas purification and laden with pollutants and apparatus for carrying out this process |
| 07/25/1990 | EP0379261A1 A process for cleaning soil |
| 07/25/1990 | EP0379040A1 Apparatus and process for waste water purification |
| 07/25/1990 | EP0378994A1 Process for the purification of waste waters containing aromatic nitro compounds |
| 07/24/1990 | US4943377 Method for removing dissolved heavy metals from waste oils, industrial wastewaters, or any polar solvent |
| 07/18/1990 | EP0377832A2 Process for the treatment of biomasses, e.g. sewage sludge, manure, etc. |
| 07/18/1990 | EP0377766A1 Process for avoiding special heavy metal refuse during the decontamination of natural and technical sludges, thermal residues and soils |
| 07/18/1990 | EP0377603A1 Clarification process. |
| 07/12/1990 | DE3919350C1 Appts. for clarifying clear slurry - comprises heating and de-watering slurry, evaporating filtrate and adding concentrate to de-watering stage |
| 07/10/1990 | US4940549 Method for removing toxic metals from agricultural drain water |
| 07/04/1990 | EP0376126A2 Improvements in water purification systems |
| 07/04/1990 | CN1008625B Aerobic process for two-stages treating of high loading waste water |
| 07/04/1990 | CN1008622B Method and installations for purification of bath water |
| 07/03/1990 | CA1271274A1 System to remove contaminants from water |
| 06/29/1990 | CA2006895A1 Water purification systems |
| 06/28/1990 | WO1990006820A1 Method of removing arsenic and/or other amphoteric elements from sludge and solid waste materials |
| 06/21/1990 | DE3842740A1 Process for removing impurities from groundwater and a well for carrying out the process |
| 06/21/1990 | DE3842071A1 Process and plant for treating surface water polluted with deicing compositions |
| 06/12/1990 | US4933087 Acidifying wasterwater, mixing in activated sludge and lime, coagulating and flocculating |
| 06/06/1990 | EP0371308A1 Method and agent of disinfecting water |
| 06/06/1990 | EP0371187A1 Process for removing substances for plant treatment from raw water |
| 06/05/1990 | US4931187 Cooling tower system |
| 05/31/1990 | DE3840276A1 Device for treating drinking water |
| 05/29/1990 | US4929375 Conveyor lubricant containing alkyl amine coupling agents |
| 05/29/1990 | US4929359 Treatment of concentrated industrial wastewaters originating from oil shale and the like by electrolysis polyurethane foam interaction |
| 05/29/1990 | CA1269767A1 Waste water treatment process |
| 05/23/1990 | DE3839232A1 Process for the recovery of copper from the effluent of poly(phenylene ether) synthesis |
| 05/22/1990 | US4927533 Water deionizing apparatus |
| 05/15/1990 | US4925571 Heating |
| 05/15/1990 | US4925551 Portable water purification system including electronic memory panel assembly |
| 05/08/1990 | US4923599 Waste water treatment apparatus |
| 05/08/1990 | CA1268867A1 Water-deionizing system |
| 05/02/1990 | EP0366429A2 Improvements in apparatus and process to separate and remove extraneous matter from a liquid stream |
| 05/01/1990 | US4921613 Method for purifying resin-containing waste liquor in the manufacture of cellulose pulps |
| 04/26/1990 | DE3835938A1 Plant for the continuous treatment of contaminated water |
| 04/24/1990 | US4919815 Treatment with powdered adsorbers reduces chemical oxygen demand; also generation and separation of fuel gas |
| 04/24/1990 | CA2001216A1 Apparatus and process to separate and remove extraneous matter from a liquid stream |
| 04/19/1990 | WO1990003950A1 Waste-water purification installation |
| 04/19/1990 | DE3918468A1 Legionella filter - comprises plastic material with specified max. pore size |
| 04/18/1990 | EP0364111A1 Water purifier |
| 04/17/1990 | US4917782 Electrolytic liquid purification process and apparatus |
| 04/11/1990 | EP0362934A1 Treatment of the effluents from the production of epoxy resins |
| 04/11/1990 | EP0250410B1 A method of removing macromolecular organic dissolved and colloidal material from wood processing industry effluents |
| 04/10/1990 | US4915842 Simple system to decompose pesticide waste water |
| 04/05/1990 | DE3932979A1 Disposal of waste water from cellulose pulp factory - by precipitating organic chlorine cpds. as lime sludge, biologically clearing water, and burning combined sludges |
| 04/04/1990 | EP0361581A1 Process for the purification of aqueous acid effluents containing halogenated compounds |
| 04/04/1990 | EP0360834A1 Method of and arrangement for purifying contaminated water |
| 04/04/1990 | CN1040971A Treatment of waste water from distillers' grains |
| 03/27/1990 | US4912032 Methods for selectively reacting ligands immobilized within a temperature-sensitive polymer gel |
| 03/27/1990 | US4911758 Washing with sodium hydroxide solution, adding calcium oxide or hydroxide; distillating; heating |
| 03/21/1990 | EP0359145A1 Soap-free lubricant preparation soluble in clear water |
| 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 |
| 03/20/1990 | US4909944 Removal of metal ions from aqueous solution |
| 03/20/1990 | US4909931 Water-purifier device |
| 03/15/1990 | DE3915970A1 Electrolytic oxygen from windmill power improves fish environment - with hydrogen used in auxiliary energy supply motor |
| 03/14/1990 | EP0358006A1 Method and apparatus for purifying waste gases from dryers |
| 03/14/1990 | EP0357761A1 Devices for treating waste water |
| 03/12/1990 | EP0355109A4 System and method for the extraction of cyanide from tails liquor. |
| 03/08/1990 | DE3827716A1 Water treatment in a plant for intensive fish culture |
| 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 | EP0356605A1 Metal precipitation and neutralisation apparatus for metal pickles containing several metals |
| 03/06/1990 | US4906387 Method for removing oxidizable contaminants in cooling water used in conjunction with a cooling tower |
| 03/06/1990 | US4906330 Process for the disposal of hardening-shop wastewaters |
| 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 | EP0355109A1 System and method for the extraction of cyanide from tails liquor |
| 02/20/1990 | US4902411 Drinking water purifier |
| 02/15/1990 | DE3826247A1 Method of processing liquid animal excrement, and the resulting spreadable fertiliser |
| 02/14/1990 | EP0354349A1 Mobile device for the treatment of polluted waters, especially pit waters |
| 02/06/1990 | US4898678 Multicompartment tanks for deleading purification; dual water flow |
| 02/01/1990 | DE3825319A1 Process and apparatus for the separation and selective degradation of ionic and nonionic constituents from aqueous and nonaqueous solutions |
| 01/31/1990 | EP0353034A2 Method and apparatus for draining waste pits |