| Patents for C02F 3 - Biological treatment of water, waste water, or sewage (46,453) |
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| 04/28/1988 | DE3636274A1 Apparatus for aerating water |
| 04/27/1988 | EP0265303A1 Process for biological waste water purification in a granular bed |
| 04/27/1988 | EP0264567A2 Bioreactor |
| 04/27/1988 | CN86106883A Hydrolyzing-oxybiotic treatment of municipal drainage |
| 04/26/1988 | CA1235827A1 Waste water treatment plant |
| 04/21/1988 | DE3635588A1 Device for biological clarification which can be arranged in a clarifying tank of a sewage treatment plant |
| 04/19/1988 | US4738750 Coagulation, flocculation, flotation |
| 04/14/1988 | DE3631344A1 Sludge activation plant |
| 04/13/1988 | EP0263796A1 Process and device for producing a biological gas from the anaerobical digestion of an organic substance |
| 04/13/1988 | EP0247162A4 Centrifugal oxygenator for treatment of waste water and system. |
| 04/13/1988 | EP0159340B1 Process for protecting lakes against eutrophization caused by subsoil water |
| 04/13/1988 | CN87211805U Aparatus for purification of sewage in life |
| 04/13/1988 | CN87104165A Fish basin of intensive fish culture and method for operating this fish basin |
| 04/12/1988 | US4737289 Process for wastewater treatment |
| 04/12/1988 | US4737278 Miniturized modular rotating biological contactor system |
| 04/07/1988 | DE3631545A1 Process and plant for the thermophilic pretreatment of sewage sludge with simultaneous decontamination |
| 04/06/1988 | EP0262865A2 Apparatus for the treatment of water to remove gas vacuolate cyanobacteria |
| 04/06/1988 | EP0262717A2 Apparatus for contacting a gas with a liquid, in particular for aerating waste water |
| 04/06/1988 | EP0262174A1 A method for biologically treating liquid with oxidizing medium, and apparatus for carrying out the method |
| 04/06/1988 | CN87106661A Equipment of removing iron and manganese from ground water |
| 04/06/1988 | CN87106248A Clarification device |
| 04/05/1988 | US4735725 Process for the improved separation of clarified liquid from biomass in the biological treatment of sewage |
| 04/05/1988 | US4735724 Solids concentrating anaerobic digestion process and apparatus |
| 04/05/1988 | US4735723 Anaerobic purification of waste water containing sulfate and organic material |
| 04/05/1988 | CA1234767A1 Clarification of fluids |
| 03/30/1988 | EP0262107A2 Anaerobic process |
| 03/30/1988 | EP0261822A2 Treatment of aqueous waste material |
| 03/30/1988 | EP0261533A2 Device for stirring a suspension of particles to be kept in teeter |
| 03/30/1988 | EP0261516A2 Process for the continuous microbiological denitrification of ground water |
| 03/30/1988 | CN86106359A Apparatus for deep-well aeration treatment of waste water with low energy-consumption |
| 03/29/1988 | US4734439 Foam-containing polyurethane(urea) compositions and process for the preparation thereof |
| 03/29/1988 | US4734197 Jet aerator header assemblies and methods for use thereof in total, partial, and non-barriered oxidation ditches |
| 03/29/1988 | US4734191 Waste water |
| 03/29/1988 | US4733972 Floating mixer apparatus with foam dispersing spray |
| 03/29/1988 | CA1234642A1 Process and apparatus for producing simultaneously compost and biogas from organic wastes |
| 03/24/1988 | WO1988001986A1 A process for the purification of wastewater containing nitrate and/or nitrite |
| 03/24/1988 | WO1988001985A1 Sewage treatment |
| 03/24/1988 | DE3631728A1 Waste water treatment plant |
| 03/24/1988 | DE3631291A1 Installation for purifying waste water |
| 03/24/1988 | DE3630751A1 Apparatus and process for the purification of waste waters |
| 03/23/1988 | EP0261046A1 Process for biological filtration of effluents with a high concentration of organic compounds |
| 03/23/1988 | EP0260904A2 Oscillating propellor type aerator apparatus and method |
| 03/23/1988 | EP0260695A2 Fixing carrier for activated sludge in sewage or waste water treatment |
| 03/22/1988 | US4732684 Method for preventing the bulking of activated sludge |
| 03/22/1988 | US4732682 Water treatment |
| 03/22/1988 | US4732680 Biochemical conversion processes |
| 03/22/1988 | US4732679 Precipitation, reducing nitrogen oxides |
| 03/22/1988 | US4732290 Load isolating gas well |
| 03/17/1988 | DE3630860A1 Plant for treating domestic waste water free from faecal matter |
| 03/17/1988 | DE3630103A1 Apparatus for ventilating a sewerage pressure pipeline |
| 03/16/1988 | EP0260244A2 A process for the purification of wastewater containing nitrate and/or nitrite |
| 03/16/1988 | EP0260187A2 Intermittent aeration type biological treatment process and system therefor |
| 03/16/1988 | EP0259938A1 Throttling device, method for using the throttling device and also device for using the method |
| 03/16/1988 | EP0259928A1 Equipment for the anaerobic fermentation of sewage water and also a method for a combined anaerobic/aerobic fermentation of sewage water |
| 03/16/1988 | EP0259771A2 Clarifying device |
| 03/16/1988 | CN87106301A Method and apparatus for widespread finely-bubbled aeration of liquids |
| 03/15/1988 | US4731185 Biological wastewater treating system |
| 03/15/1988 | US4731179 Vessel for anaerobic fermentation |
| 03/15/1988 | CA1234229A1 Process and apparatus for the anaerobic biological purification of wastewater |
| 03/10/1988 | WO1988001608A1 Installation for biological purification of waste water |
| 03/10/1988 | WO1988001607A1 Process for decomposing mineral oil derivatives contained in washings and sludges |
| 03/09/1988 | EP0258912A1 Device for converting an electrical signal into an acoustic signal comprising an electrostatic transducer unit |
| 03/09/1988 | EP0258228A1 An apparatus for the purification of water, waste water in particular, by a biological oxidation method |
| 03/09/1988 | CN87105135A A process for the biological purification of sewage and a device for carrying out such a process |
| 03/08/1988 | US4729831 Method for preventing the bulking of activated sludge |
| 03/08/1988 | US4729828 Modular rotating biological contactor system |
| 03/02/1988 | EP0257317A1 Device for the treatment of floors of stretches of water |
| 03/02/1988 | EP0257284A2 Method for adding odour and/or corrosion preventing agents to waste water |
| 03/02/1988 | EP0160681B1 Aerobic microbiological method |
| 03/01/1988 | US4728517 Wastewater treatment, food processing |
| 03/01/1988 | US4728441 Electrical waste water treatment system employing oxygen recovery and ozone injection means |
| 03/01/1988 | US4728427 Water pollution control |
| 02/25/1988 | WO1988001255A1 Process for the degradation of coal tar constituents by white rot fungi |
| 02/25/1988 | WO1988001197A1 Packing elements |
| 02/25/1988 | DE3628314A1 Device for the multiple-stage biological purification of organically contaminated waste water in a modular design |
| 02/25/1988 | DE3628030A1 Biological process for gas impurities - in three stages using packing column and bio:filters |
| 02/25/1988 | DE3627253A1 Process for the biological treatment of substrates containing organic substances |
| 02/24/1988 | EP0256433A2 Process for biological waste water treatment by means of a multistep rotating biological contactor plant |
| 02/24/1988 | EP0256432A2 Process for the biological treatment of waste water |
| 02/23/1988 | US4727039 Living bacterial preparation as well as method for preparing and storing same |
| 02/23/1988 | US4727031 Nutrient for stimulating aerobic bacteria |
| 02/23/1988 | US4726899 Apparatus for anaerobic digestion of organic waste |
| 02/18/1988 | DE3726895A1 Device for propelling a liquid for a liquid circuit |
| 02/18/1988 | DE3627665A1 Method and apparatus for introducing gases as fine bubbles into liquids |
| 02/18/1988 | DE3626618A1 Apparatus for handling the beds of bodies of water |
| 02/17/1988 | CN87202513U Small-sized sewage treatment equipment |
| 02/17/1988 | CN87105407A Treatment method of activated sludge of sewage or industrial waste water |
| 02/16/1988 | US4725357 Microbial digestion, reduction of hexavalent selenates, entrainment, volatilization |
| 02/10/1988 | EP0255745A1 Process for the biological treatment of waste water from a flue gas desulphurization plant |
| 02/10/1988 | EP0255642A2 Liquid-gas dispersion reactor |
| 02/09/1988 | USRE32597 Apparatus for the anaerobic purification of waste water |
| 02/09/1988 | US4724073 Reactor piping and flow control system |
| 02/09/1988 | US4723968 Method and apparatus for the purification of waste air containing biologically decomposable impurities |
| 02/09/1988 | CA1232431A1 Process and apparatus for the exchange of material and/or heat between and/or for mixing of gaseous and/or liquid substances |
| 02/04/1988 | DE3624580A1 Finely porous plastic aerator through which water can flow |
| 02/02/1988 | US4722898 Immobilization of biological cells in polytetrafluoroethylene matrix |
| 02/02/1988 | US4722785 Partial or non-barriered oxidation ditch having momentum conservation and increased oxygen transfer efficiency |
| 02/02/1988 | US4722741 Production of high methane content product by two phase anaerobic digestion |
| 02/02/1988 | CA1232150A1 Plant for processing organic material |
| 01/28/1988 | WO1988000614A1 Recovery of material |