| Patents for C02F 9 - Multistep treatment of water, waste water or sewage (41,429) |
|---|
| 10/26/1994 | EP0621076A1 Method for the separation of solids |
| 10/25/1994 | US5358643 Using an iron salt, acid and oxidizer |
| 10/25/1994 | CA2025383C Arrangement to purify contaminated ground water |
| 10/20/1994 | DE4312351A1 Process for the decontamination of soils and building rubble contaminated with heavy metals and hydrocarbons |
| 10/19/1994 | EP0643673A4 Removal of cyanide from water. |
| 10/18/1994 | US5356539 Oxidizing nitrophenols with hydrogen peroxide and ferrous ion catalyst under acidic conditions, removing nitroaromatics with carbon adsorbent |
| 10/18/1994 | CA2079632C Method for the removal of chromium compounds from aqueous solutions |
| 10/13/1994 | WO1994022772A1 Oxidative method of purifying highly contaminated waste water |
| 10/13/1994 | CA2159198A1 Oxidative method of purifying highly contaminated waste water |
| 10/12/1994 | CN2179376Y Full automatic circulating water quality treatment unit |
| 10/12/1994 | CN1093343A Automatic and quick wastewater purification system by biological method |
| 10/11/1994 | US5354479 Adding high molecular weight polyethylene oxide and cellulose ether to process water to flocculate the resin |
| 10/11/1994 | US5354358 Dissolving in aqueous solution, organic solvent extraction, precipitation, separation |
| 10/06/1994 | DE4332762C1 Process and apparatus for the biological treatment of organically polluted waste water and organic waste |
| 10/05/1994 | EP0618176A1 Process for color reduction of dye wastewater |
| 10/05/1994 | EP0563097B1 Processing waste solidification |
| 09/29/1994 | WO1994021857A1 Treatment of bleach plant effluents |
| 09/29/1994 | WO1994021345A1 Removing toxic metals from solutions |
| 09/29/1994 | CA2157923A1 Process for the removal of toxic cyanide and heavy metal species from alkaline solutions |
| 09/29/1994 | CA2134882A1 Treatment of bleach plant effluents |
| 09/28/1994 | EP0616980A1 Tandem waste stream treatment for the removal of nitroaromatics and nitrophenolics |
| 09/28/1994 | EP0616975A2 Home water purification system |
| 09/27/1994 | US5350522 Treatment of effluents from photographic processes for pollution control |
| 09/27/1994 | US5350511 Sewage purification apparatus |
| 09/22/1994 | DE4308159A1 Process for decreasing the COD load in wastewater |
| 09/21/1994 | EP0615473A1 Method and device for removing one or more contaminations from a bulk material. |
| 09/21/1994 | CN1092477A Method and apparatus for wet treatment of solid surfaces |
| 09/21/1994 | CN1092386A Treatment of highly colored wastewaters |
| 09/20/1994 | US5348665 Method for the degradation of harmful substances in water by means of hydrogen peroxide under UV irradiation |
| 09/20/1994 | US5348662 Removal of heavy metals such as arsenic, tin and lead from water by precipitation and oxidation of organics and metals and separation |
| 09/20/1994 | US5348653 Process for the biological purification of effluent |
| 09/20/1994 | US5348588 Evaporative treatment of inorganic saponifier wash water |
| 09/15/1994 | DE4400982A1 Compositions for treating wastewater containing heavy metals |
| 09/15/1994 | DE4307468A1 Process for precipitation of heavy metals, uranium and toxic metals in the rehabilitation of mining installations, in particular from contaminated waters |
| 09/13/1994 | US5346620 Process for waste water treatment by removal of sodium sulfate |
| 09/13/1994 | US5346617 Method and apparatus for purifying waste water |
| 09/07/1994 | EP0613936A1 Process for reducing of sour water corrosiveness |
| 09/07/1994 | CN1091723A Method for treatment of waste water containing pentaerythritol |
| 09/06/1994 | US5344572 Method for treating waste pickle liquor |
| 09/06/1994 | US5344566 Dechlorination and demetallization of waste water |
| 09/06/1994 | CA1331896C Two-stage batch wastewater treatment |
| 09/06/1994 | CA1331895C System and method for the extraction of cyanide from tails liquor |
| 09/06/1994 | CA1331890C Process for treatment of water containing volatile and toxic compounds |
| 09/01/1994 | WO1994019285A1 Detergent-free cleansing water, process and apparatus for producing the cleansing water, and method of separating emulsion formed by using the cleansing water into water and oil |
| 09/01/1994 | WO1994019093A1 Water purification system and method |
| 09/01/1994 | DE4306844A1 Process for the combined physical/chemical cleaning of waters contaminated with the explosive substances 2,4,6-trinitrotoluene, hexahydro-1,3,5-trinitro-1,3,5-triazine and octahydro-1,3,5,7-tetranitro-1,3,5,7-tetrazine |
| 09/01/1994 | CA2156496A1 Water purification system and method |
| 08/31/1994 | EP0567601B1 Process and device for purifying sewage |
| 08/31/1994 | EP0518871B1 Waste water treatment process using a recycle of high density sludge |
| 08/30/1994 | US5342538 Liquid suspension of polyethylene oxide for use in treating paper and pulp wastewater |
| 08/30/1994 | US5341877 Method and apparatus for in situ removal of a spilled fluid from the earth's subsurface |
| 08/23/1994 | US5340483 Purification a mixture by enzymatical oxidation a phenolic compound with tyrosinas to a compound which can be adsorbed by chitosan |
| 08/23/1994 | US5340478 Dual chamber water filter |
| 08/18/1994 | WO1994018133A1 Treatment of solid and liquid effluents from tan-yards for removing and recovering the chromium contained in the effluents |
| 08/18/1994 | WO1994018127A1 Pure water manufacturing method |
| 08/16/1994 | US5338460 Sulfide precipitation of heavy metals from aqueous solutions |
| 08/16/1994 | US5338459 Muddy and waste water treatment method |
| 08/16/1994 | US5338456 Water purification system and method |
| 08/10/1994 | EP0609308A1 Installation for decontaminating soil |
| 08/10/1994 | EP0480055B1 Method of purifying lacustrine water and filthy water purification boat |
| 08/10/1994 | CN2173784Y Horizontal integrative sewage treatment device |
| 08/09/1994 | US5336413 Process and apparatus for the purification of water |
| 08/09/1994 | US5336398 Water treatment device |
| 08/09/1994 | CA1331407C Sewage treatment plant |
| 08/09/1994 | CA1331349C Apparatus and process to separate and remove extraneous matter from a liquid stream |
| 08/04/1994 | WO1994017225A1 Silver bath waste treatment apparatus and method |
| 08/04/1994 | DE4302306A1 Reducing content of adsorbable organic halogen in waste water |
| 08/02/1994 | US5334313 Reduction of acrylonitrile in wastewater from the production of ABS plastic |
| 08/02/1994 | CA1331227C Method and apparatus for treating bodies of water |
| 08/02/1994 | CA1331175C Soap free conveyor lubricant that gives clear solutions in water |
| 07/27/1994 | EP0608200A1 Wastewater treatment |
| 07/27/1994 | EP0489080B1 Treatment method for emulsified petroleum wastes |
| 07/27/1994 | CN2172671Y Water-purifying device |
| 07/27/1994 | CN1089924A Method for treatment of waste water |
| 07/26/1994 | US5332508 Reversible photodeposition and dissolution of metal ions |
| 07/23/1994 | CA2087893A1 Organic halide reduction process |
| 07/20/1994 | EP0607019A1 Systematic tertiary effluent polishing |
| 07/20/1994 | EP0606291A1 Process and device for recovering components from dyestuff dispersions. |
| 07/20/1994 | CN1089578A Method of treating process water |
| 07/20/1994 | CN1025490C Method and apparatus for the clarification of sewage and other impure waste water |
| 07/19/1994 | US5330658 Solution decontamination method using precipitation and flocculation techniques |
| 07/19/1994 | US5330657 System and method for removing asbestos particles from a slurry |
| 07/19/1994 | US5330639 Mobile water agitating and aerating apparatus |
| 07/13/1994 | EP0605882A1 Method and apparatus for wet treatment of solid surfaces |
| 07/12/1994 | US5328616 Methods and apparatus for treating electroless plating baths |
| 07/12/1994 | US5328599 System using sulfide ion-selective electrodes for control of chemical feed of organic sulfide products for metal ion precipitation from waste water |
| 07/12/1994 | CA2113155A1 Systematic tertiary effluent polishing |
| 07/07/1994 | WO1994015019A1 Method of disposing of excess sludge |
| 07/07/1994 | WO1994014520A1 System and process for treatment of cyanide-containing waste |
| 07/07/1994 | DE4306445C1 Reducing corrosivity of acid water contg. cyanide and ammonium and sulphide ions |
| 07/07/1994 | CA2152618A1 Method of disposing of excess sludge |
| 07/06/1994 | EP0604904A1 Process for the treatment of waste water by chemical oxydation |
| 07/05/1994 | US5326479 Treatment of pulp and paper wastewater with reducing agent and a polymer for color removal |
| 07/05/1994 | US5326468 Nozzles and throats for water treatment |
| 07/05/1994 | US5326439 In-situ chromate reduction and heavy metal immobilization |
| 07/05/1994 | US5325605 Method and apparatus for waste treatment |
| 06/30/1994 | DE4313425A1 Reducing the arsenate concn of water |
| 06/29/1994 | EP0603345A1 Water compositions |
| 06/29/1994 | CN2170302Y Treater for drinking water |
| 06/28/1994 | US5324439 Process for the recovery of metal from cyanide-containing liquid wastes |