| Patents for C02F 9 - Multistep treatment of water, waste water or sewage (41,429) |
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| 05/20/1980 | US4203836 Absorption of the metal hydroxides |
| 05/20/1980 | US4203835 Waste water treatment method using activated carbon |
| 05/14/1980 | EP0010713A1 Process for the purification of waste water containing organic compounds of sulfur and phosphor |
| 05/13/1980 | US4202371 System for pollution suppression |
| 05/13/1980 | CA1077435A1 Chlorine-based bleachery effluent treatment |
| 05/06/1980 | US4201666 Treating pulp-and-paper mill streams |
| 05/06/1980 | US4201636 Recovering group 8 metal hydroxides and hydrated oxides from effluents; adjust ph, filtration, heating, and electrolysis |
| 05/01/1980 | WO1980000832A1 Treatment of sea discharged sewage |
| 04/30/1980 | EP0010337A1 A plant for gathering and purifying water and waste water |
| 04/29/1980 | US4200526 Process for treating waste water |
| 04/29/1980 | CA1076363A1 Method for the removal of mercury from sludges containing same |
| 04/22/1980 | CA1076276A1 Process for reducing the mercury content of industrial waste waters |
| 04/15/1980 | US4198296 Process and apparatus for treating drinking water |
| 04/15/1980 | CA1075440A1 Process for removing heavy metals from fluid media |
| 04/15/1980 | CA1075410A1 Chemical recovery utilizing evaporation steam and exchangers in steam stripping system |
| 04/08/1980 | US4197200 Shipboard blackwater physical/chemical treatment system |
| 04/08/1980 | US4197195 Divinylbenzene-styrene copolymer as absorbent |
| 04/01/1980 | US4196081 Apparatus for emergency water purification |
| 03/18/1980 | US4193869 Wastewater and wastewater solid processing system |
| 03/18/1980 | US4193859 Selective multiple electrode waste water treating system |
| 03/18/1980 | US4193854 Heavy metal removal from wastewater sludge |
| 03/11/1980 | CA1073333A1 Apparatus for tensioning and locking hooping bands |
| 03/04/1980 | CA1073126A1 Treatment of pulp and paper effluents |
| 03/04/1980 | CA1072725A1 System for pollution suppression |
| 02/26/1980 | US4190539 Apparatus for on-site renovation of sanitary waters |
| 02/26/1980 | CA1072412A1 Chrome removal and recovery |
| 02/20/1980 | EP0008074A1 Process for the chemical and biological treatment of waste water |
| 02/19/1980 | US4189381 Ion exchanging to remove molybdenum, froth flotation by electrolysis, oxidation of cyanide |
| 02/19/1980 | CA1072018A1 Ship waste water treating with flotation and membrane permeation |
| 02/19/1980 | CA1071839A1 Process for the treatment of acidic waste liquid containing dissolved ferrous salts |
| 02/12/1980 | US4188292 Ion exchanging, reaction with nitric oxide, nitrous acid or nitrite salt |
| 02/12/1980 | US4188291 Treatment of industrial waste water |
| 02/12/1980 | CA1071358A1 Method of reducing waste stream pollutants by the control and separation of waste contaminants from a multi-stage cellulosic bleaching sequence |
| 02/06/1980 | EP0007325A1 Process and assembly for removing a dissolved or suspended contaminant from a polar liquid as a solid substance |
| 02/05/1980 | US4187195 Method for reactivating carbon |
| 01/29/1980 | US4186088 Aqueous ferrous waste conversion process |
| 01/15/1980 | CA1069943A1 Aqueous stream treatment in chlorinated hydrocarbon production |
| 01/08/1980 | US4182676 Method and system for purifying liquid |
| 01/08/1980 | CA1069302A1 Method and device for sludge treatment |
| 12/25/1979 | CA1068833A Vortex coagulation means and method for wastewater clarification |
| 12/18/1979 | US4179365 Process for treating waste water |
| 12/12/1979 | EP0005827A1 Method of removing contaminants from water |
| 12/12/1979 | EP0005703A1 Process for the preparation of fuel and nutritive substances from wastes |
| 12/04/1979 | CA1067251A1 Self-contained recirculating toilet system |
| 11/27/1979 | US4176060 Process for soluble cyanide removal from wastewater streams |
| 11/27/1979 | US4176057 Method and apparatus for recovering liquid and solid constituents of water solutions containing sparingly soluble solids |
| 11/14/1979 | EP0005262A2 Process for separating mercury from aqueous solutions |
| 11/14/1979 | EP0005203A2 Process for treating waste waters containing aromatic nitro-hydroxy compounds |
| 11/06/1979 | US4173532 Containing starches and sugars; continuous circulation, hydrolysis, flocculation, clarification |
| 10/23/1979 | US4172034 Method and apparatus for integrated local treatment of biologically degradable waste |
| 10/17/1979 | EP0004841A2 Integrated process for treating waste water from anodisation plants |
| 10/16/1979 | US4171265 Suppression of pollution in mineral fiber manufacture |
| 10/16/1979 | CA1064630A1 Process and apparatus for treating drinking water |
| 10/16/1979 | CA1064629A1 Apparatus for removal of materials from fluids |
| 10/09/1979 | US4170554 Wastewater treatment method |
| 10/02/1979 | CA1063522A1 Chemical concentration by sequential activated carbon adsorption and fractionation |
| 10/02/1979 | CA1063317A1 Apparatus and method of disinfection of drinking water |
| 09/25/1979 | CA1063062A1 Method and apparatus for electrosanitizing waste water |
| 09/25/1979 | CA1063036A1 Chemical concentration by activated carbon adsorption |
| 09/18/1979 | US4168228 Waste water purification |
| 09/18/1979 | CA1062648A1 Liquid waste processing system |
| 09/05/1979 | EP0003862A1 Process for the removal of heavy metals from aqueous liquids |
| 08/28/1979 | US4166037 Water treatment |
| 08/28/1979 | US4166033 Process for the separation of polyvinyl alcohol from aqueous solutions |
| 08/28/1979 | CA1061260A1 Process and treating equipment of polluted effluent by means of colloidal emulsions |
| 08/28/1979 | CA1061189A1 Method of disposing of waste water containing emulsified oil |
| 08/21/1979 | US4165401 Recovery of suspended particulate metal from quench water |
| 08/21/1979 | US4165289 Self-sufficient heat treatment |
| 08/21/1979 | US4165288 Filtration; reverse osmosis |
| 08/07/1979 | US4163716 Process for the purification of contaminated water |
| 07/31/1979 | CA1059663A1 Metal cyanide complex compound disposal |
| 07/24/1979 | US4162218 Incorporating a gray water storage tank |
| 07/11/1979 | EP0002858A1 Sanitation process and apparatus for continually overloaded water treatment plants |
| 07/10/1979 | US4160738 Households |
| 07/10/1979 | US4160734 For removing liquid, solid and semi-solid wastes |
| 07/10/1979 | US4160730 Adding hypochlorite, reduction, entrainment in a gas |
| 07/10/1979 | US4160594 Method and arrangement for the development of latent images particularly latent photographic images |
| 07/03/1979 | US4159944 Chelation of heavy metals from fertilizers |
| 07/03/1979 | CA1057866A1 Microbiological method for removing pathogenic microbes and dissolved organic materials from liquids |
| 06/26/1979 | US4159309 Process for the catalytic reduction of reducible compounds in solution |
| 06/26/1979 | US4159248 Denatering, sewage treatment |
| 06/19/1979 | CA1056738A1 Esterification process waste water purification |
| 06/12/1979 | US4157961 Combined waste water clarification and trash disposal system |
| 06/12/1979 | US4157942 Method for recovery of metals from metal plating baths and neutralizing toxic effluents therefrom |
| 06/05/1979 | US4157300 Oxidation of phenol with chlorine dioxide formed in situ by reaction of formaldehyde with a group 1a or 2a chlorite |
| 06/05/1979 | CA1056075A1 Degerminating bath water contaminated by the bacteria pseudomonas pyocanea |
| 05/29/1979 | US4156648 Flotation device with pretreatment |
| 05/29/1979 | CA1055420A Photooxidative destruction of organic wastes |
| 05/22/1979 | US4155845 Flocculation |
| 05/15/1979 | US4154673 Ion exchanging dithionic acid anions |
| 05/08/1979 | US4153669 Removal of metals from waste materials that contain bimetallic salt complexes |
| 05/08/1979 | US4153452 Recovery of metals from bimetallic salt complexes |
| 05/01/1979 | US4152238 Softening and regulating ph of drinking water |
| 05/01/1979 | US4152229 Apparatus and method for removal of soluble metal ions from aqueous effluent |
| 05/01/1979 | US4152113 System for dyeing hosiery goods |
| 05/01/1979 | CA1053812A1 Device for purifying sewer water in small sewer systems |
| 05/01/1979 | CA1053513A1 Treatment of waste liquid and apparatus therefor and a fertilizer composition obtained thereby |
| 04/24/1979 | US4151085 Water purification system |
| 04/24/1979 | US4151077 Forming mercury mercaptide salt, acidification |
| 04/18/1979 | EP0001470A1 A process for enzymatic treatment of waste water of wheat starch plants |