| Patents for C02F 3 - Biological treatment of water, waste water, or sewage (46,453) |
|---|
| 07/22/1980 | US4214050 By intermittent immersion in a buffered bactericidal solution |
| 07/22/1980 | US4213871 Biological activators |
| 07/22/1980 | US4213864 Combination of a biological dry toilet and a biological waste water purifying plant |
| 07/22/1980 | US4213857 Anaerobic digestion process |
| 07/22/1980 | CA1082375A1 Method and system for aeration of waste liquids |
| 07/09/1980 | EP0013035A1 Apparatus for the biological purification of waste water |
| 07/09/1980 | EP0012745A1 Oxidation ditch with flow-control apparatus and use thereof in an activated sludge process. |
| 07/08/1980 | US4211733 Gas-liquid mixing process and apparatus |
| 07/08/1980 | US4211657 Means for biological treatment of water |
| 07/08/1980 | US4211655 Upflow filter construction |
| 07/08/1980 | US4211654 Apparatus for aerobic treatment of contaminated liquid |
| 07/08/1980 | US4211647 Anaerobic method of treating high-strength waste-water |
| 07/08/1980 | US4211646 Waste water process |
| 07/08/1980 | US4211645 Foam flotation activated sludge process |
| 07/08/1980 | CA1081378A1 Continuous fermentation process and apparatus |
| 07/08/1980 | CA1081377A1 Method of and apparatus for enriching oxygen contained in water |
| 07/08/1980 | CA1081376A1 Ozone disinfection in waste water treatment with recycling of ozonation off gas |
| 07/01/1980 | US4210721 Method for dissolving collagen-containing skin tissues |
| 07/01/1980 | US4210613 Water treating device |
| 07/01/1980 | US4210534 Multiple stage jet nozzle and aeration system |
| 07/01/1980 | US4210528 Effective management of nitrogen in system |
| 07/01/1980 | CA1080862A1 Septic tank |
| 06/25/1980 | EP0012658A1 Process for the biological treatment of waste water on an adsorption bed |
| 06/25/1980 | EP0012476A1 A process and apparatus for anaerobic conversion of organic material in an aqueous medium |
| 06/24/1980 | US4209591 Enzymatic conversion process |
| 06/24/1980 | US4209590 Using an n-haloalkythiophthalimide as promoter |
| 06/24/1980 | US4209396 Methods for use in water purification particularly sewage treatment |
| 06/24/1980 | US4209390 Process for biological denitrification of effluents |
| 06/24/1980 | US4209389 Sewage treatment with kefir milk acid bacteria |
| 06/24/1980 | US4209388 Method and apparatus for treating sewage |
| 06/24/1980 | CA1080114A1 Elutriation leg and method |
| 06/17/1980 | US4208375 Incorporating a fluid |
| 06/17/1980 | US4208279 Method and apparatus for processing animal waste |
| 06/17/1980 | CA1079875A1 Treatment of biologically-degradable waste |
| 06/17/1980 | CA1079874A1 Surface aeration impeller |
| 06/17/1980 | CA1079747A1 Basic detergent for liquid lyes |
| 06/10/1980 | US4207275 Mixing apparatus |
| 06/10/1980 | US4207180 Gas-liquid reaction method and apparatus |
| 06/10/1980 | US4207179 Biotreatment using carbon treated recycle and/or clarifier effluent backwash |
| 06/10/1980 | CA1079422A1 Flexible downcomer for vertical waste treatment apparatus |
| 06/03/1980 | US4206047 Multi-stage systems for waste water oxidation |
| 06/03/1980 | CA1078977A1 Production of non-bulking activated sludge |
| 05/29/1980 | WO1980001067A1 Method for sewage treatment with bacteria |
| 05/28/1980 | EP0011573A1 Process for treating sludge from septic tanks |
| 05/27/1980 | US4204958 Method and apparatus for treatment of sludge |
| 05/27/1980 | US4204955 System for pollution suppression |
| 05/27/1980 | US4204954 Detoxification of residual quaternaries |
| 05/27/1980 | US4204842 Methane-producing bacteria |
| 05/20/1980 | US4203841 Apparatus for high-efficient microbiological oxidation treatment |
| 05/14/1980 | EP0010571A1 Process and apparatus for carrying out (bio)chemical reactions and unit operations in fluid systems |
| 05/13/1980 | US4202774 Flow distributor for fluid bed biological reactor |
| 05/13/1980 | US4202763 High-efficient activated sludge method |
| 05/13/1980 | US4202762 Process and device for the aeration of waste water |
| 05/13/1980 | US4202371 System for pollution suppression |
| 05/06/1980 | US4201663 Method and apparatus for the enhanced treatment of food processing waste waters using aerobic microorganisms |
| 05/01/1980 | WO1980000832A1 Treatment of sea discharged sewage |
| 04/30/1980 | EP0010473A1 Process for water purification |
| 04/30/1980 | EP0010337A1 A plant for gathering and purifying water and waste water |
| 04/30/1980 | EP0010243A1 Process for treating biomasses; modified biomasses and their application |
| 04/29/1980 | US4200597 Device for revolving liquids and supplying gas thereto |
| 04/29/1980 | US4200534 Apparatus for renovation of sanitary waters |
| 04/29/1980 | US4200532 Wastewater treatment apparatus |
| 04/29/1980 | US4200524 Bio-surface separation process |
| 04/29/1980 | US4200523 Process for removing sulfate ions from aqueous streams |
| 04/29/1980 | US4200505 Electrochemical conversion of organic material |
| 04/29/1980 | US4199828 Vacuum toilet apparatus for mobile units |
| 04/29/1980 | CA1076721A1 Process for oxidation treatment of fe2+ in waste water |
| 04/22/1980 | US4199452 Jet aeration channel system |
| 04/22/1980 | US4199444 Treatment with pseudomonas aeruginosa under aerobic conditions |
| 04/17/1980 | WO1980000694A1 Manure gas plant for the batch treatment of waste |
| 04/16/1980 | EP0010045A1 Gas-liquid reaction device and especially a trickle filter |
| 04/16/1980 | EP0009580A1 Process and apparatus for the regulation and/or the control of a biological waste water purification plant |
| 04/15/1980 | US4198359 Apparatus for gasification of liquids |
| 04/15/1980 | US4198292 Anaerobic digestion |
| 04/15/1980 | US4198211 Microbiological processes to produce fuel gas |
| 04/08/1980 | US4197202 Biological sewage treatment plant |
| 04/08/1980 | CA1075165A1 Adaptable filtering enclosure |
| 04/01/1980 | US4196082 Combination of a biological dry toilet and a biological waste water purifying plant |
| 04/01/1980 | US4196074 Dissolving oxygen in sewage |
| 04/01/1980 | CA1074695A1 Method and apparatus for recovering metal values from mineral ores by in-situ mining |
| 03/25/1980 | US4195043 Randomly dumpable self orienting spiral packing elements |
| 03/25/1980 | CA1074467A1 Process and apparatus for treating wastes by a combined activated sludge and biological filter bed |
| 03/25/1980 | CA1074294A1 Apparatus for sparging gas into liquid |
| 03/20/1980 | WO1980000435A1 Method for treating water |
| 03/19/1980 | EP0008856A1 Apparatus and process for dissolution of gases in liquid |
| 03/19/1980 | EP0008810A1 Process and device for the biological purification of waste water by the activated-sludge process |
| 03/18/1980 | US4193951 Water aerating device |
| 03/18/1980 | US4193950 Apparatus for introducing gas into a liquid |
| 03/18/1980 | US4193949 Apparatus for generating finely divided particulate bubbles |
| 03/18/1980 | US4193854 Heavy metal removal from wastewater sludge |
| 03/11/1980 | US4192742 Process and apparatus for the biological treatment of waste water |
| 03/11/1980 | US4192741 Process for treating sewage effluent |
| 03/11/1980 | US4192740 Two zone process for biological treatment of waste water |
| 03/11/1980 | EP0012745A4 Oxidation ditch with flow-control apparatus and use thereof in an activated sludge process. |
| 03/06/1980 | WO1980000335A1 Process for treating cyanide and cyanate containing wastewaters |
| 03/05/1980 | EP0008471A1 Process for the nitrification and denitrification of waste water |
| 03/05/1980 | EP0008462A1 Apparatus for mixing and aerating liquids |
| 03/04/1980 | CA1072725A1 System for pollution suppression |
| 02/26/1980 | US4190619 Liquid aerating rotor assembly |
| 02/26/1980 | US4190543 Waste water treatment apparatus |