| Patents for C02F 3 - Biological treatment of water, waste water, or sewage (46,453) |
|---|
| 05/23/1990 | CA2003505A1 Process for bleaching pulp |
| 05/22/1990 | US4927530 Apparatus for processing sludge |
| 05/22/1990 | CA1269493A1 Process for the improved separation of clarified liquid from biomass in the biological treatment of sewage |
| 05/17/1990 | WO1990005118A1 Solar aquatic method and apparatus for treating waste |
| 05/17/1990 | WO1990005117A1 Treatment of activated sludge |
| 05/17/1990 | WO1990005116A1 Use of aminoaldehyde polymers for purifying waste water |
| 05/17/1990 | CA2003100A1 Rapid degradation of halogenated hydrocarbons by soluble methane monooxygenase or methanotrophic bacteria comprising same |
| 05/16/1990 | EP0368814A1 Integrated process of phytodepuration for waste-water |
| 05/16/1990 | EP0367799A1 Device for dispersing gas within a liquid phase |
| 05/16/1990 | EP0367764A1 Process for disposal, and in particular hygienic treatment, of the sludge formed in a clarification plant. |
| 05/15/1990 | US4925802 Method for stimulating biodegradation of halogenated aliphatic hydrocarbons |
| 05/15/1990 | US4925598 Aerator for industrial and domestic wastewaters |
| 05/15/1990 | US4925564 Bacterial incubator and method of use |
| 05/15/1990 | US4925552 Reduce organic contaminates |
| 05/15/1990 | CA1269184A1 Stimulation of biooxidation processes in subterranean formations |
| 05/15/1990 | CA1269183A1 Method for decontaminating a permeable subterranean formation |
| 05/10/1990 | DE3837852A1 Small sewage treatment plant having a multiple chamber pit |
| 05/10/1990 | DE3837798A1 Carrier body as growth surface for biomass |
| 05/09/1990 | EP0367756A1 Process and apparatus for the denitrification of liquids |
| 05/09/1990 | CN1041927A Method of treating penicillin waste water |
| 05/08/1990 | US4923614 Process and device for large surface-area fine-bubble gasification of liquids |
| 05/08/1990 | CA1268874A1 Process for the preparation of filler-containing, anionically modified polyurethane (urea) compositions, the polyurethane (urea) compositions so- obtained, and the use thereof |
| 05/07/1990 | CA2002342A1 Method for purification of waste water |
| 05/03/1990 | WO1990004444A1 Multiplex gas phase precipitation tank |
| 05/03/1990 | DE3920827C1 Decontamination of earth - by covering with foil pref. insulated and spraying earth with water and air under controlled conditions |
| 05/03/1990 | DE3905227C1 Heat exchangers for sewage sludge |
| 05/03/1990 | DE3836906A1 Process for treating sewage sludge |
| 05/03/1990 | DE3836603A1 Process and apparatus for anaerobic biological waste water purification |
| 05/02/1990 | EP0366644A1 Mixer and/or aerator for waste water |
| 05/02/1990 | EP0366477A1 Rotary biological contactor |
| 05/02/1990 | EP0366317A1 Method and apparatus for improving the quality of a large amount of water |
| 05/02/1990 | EP0366186A1 Upflow sludge-bed reactor for anaerobic purification |
| 05/02/1990 | EP0366010A1 Mobile device for oxygenating waters |
| 05/02/1990 | EP0247162B1 Centrifugal oxygenator for treatment of waste water and system |
| 05/02/1990 | CN1041745A Rural methane generating pit convenient for making gas and fertilizer and building it |
| 05/02/1990 | CN1041744A Comprehensive utilization of residue from anaerobic treatment of brewer's grains liquid in brewery |
| 05/01/1990 | US4921604 Upflow biological reator waste water treatment system |
| 05/01/1990 | CA1268566A1 Method and device for water-airing |
| 04/25/1990 | EP0365245A1 Apparatus and a system for monitoring impurity in a liquid |
| 04/24/1990 | US4919815 Treatment with powdered adsorbers reduces chemical oxygen demand; also generation and separation of fuel gas |
| 04/24/1990 | US4919814 System and method for treating wastewater collected from septic tanks and similar installation |
| 04/24/1990 | US4919813 And alcohols by adding photosynthetic bacteria, exposure to radiation to convert to hydrogen and carbon dioxide |
| 04/24/1990 | US4919568 System for draining land areas through siphoning from a permeable catch basin |
| 04/19/1990 | WO1990003950A1 Waste-water purification installation |
| 04/19/1990 | DE3835374A1 Process for purifying waste water in an activation tank |
| 04/19/1990 | DE3703442A1 Promoting bacteriological break-down of tipped wastes - by applying treated water under covering plastic sheet |
| 04/18/1990 | EP0363865A2 Aerating device |
| 04/18/1990 | EP0363718A1 Process for biological waste water purification, and configuration of particular installation parts |
| 04/18/1990 | CN2056157U Umbrella-type aerator with two rings |
| 04/17/1990 | US4918018 Microorganism for use in industrial processes |
| 04/17/1990 | US4917805 Cyclical complete mix activated sludge process |
| 04/17/1990 | US4917802 Method for treating waste water |
| 04/12/1990 | DE3904127C1 Process and device for the biochemical purification of waste waters |
| 04/12/1990 | DE3834244A1 Process and device for purifying fat- or oil-containing waste water |
| 04/12/1990 | DE3833185A1 Process for biological waste water purification |
| 04/11/1990 | EP0362934A1 Treatment of the effluents from the production of epoxy resins |
| 04/11/1990 | EP0362431A1 Improved process for dissolving a gas in a liquid |
| 04/10/1990 | US4915884 Cationic hydrophilic sites on thermoplastic resin |
| 04/10/1990 | US4915842 Simple system to decompose pesticide waste water |
| 04/10/1990 | US4915841 Process for the biological purification of waste waters |
| 04/10/1990 | US4915840 Sewage treatment; pollution control; hydrolyzing, degestion |
| 04/10/1990 | US4915829 Activated-sludge aeration system |
| 04/10/1990 | CA1267619A1 Immobilization of biological cells in polytetrafluoroethylene matrix |
| 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 |
| 04/05/1990 | DE3833356A1 Biogas plant having a flexible dome |
| 04/05/1990 | DE3833039A1 Process and apparatus for the purification of phosphate- and nitrogen-containing waste water |
| 04/04/1990 | EP0361324A1 Process and apparatus for the denitrification of nitrogenous waste waters |
| 04/04/1990 | EP0361225A1 Filling element |
| 04/04/1990 | CN1040970A Method and apparatus for microbiological purification of water |
| 04/04/1990 | CN1040969A Technology for mesophilic digestion and high-temp. process of city excrement |
| 04/03/1990 | US4913820 Contacting mixture of sewage and activated sludge with polyvinylpyridine, forming floc, separating by gravity |
| 03/28/1990 | EP0360276A2 Microbial adsorbent and microbial sensor using the same |
| 03/28/1990 | EP0359969A1 Filter for the purification of fluids |
| 03/28/1990 | EP0359965A1 Apparatus for replenishing waters with oxygen |
| 03/28/1990 | CN1040775A Denitrifying method of high nitrogen-containing sewage and its equipment |
| 03/27/1990 | US4911849 Method and means of aeration-powered water flow using foil-shaped contour |
| 03/27/1990 | US4911843 Process for removal of dissolved hydrogen sulfide and reduction of sewage BOD in sewer or other waste systems |
| 03/27/1990 | US4911836 Submerged aeration system |
| 03/22/1990 | WO1990002710A1 Wastewater treatment system |
| 03/22/1990 | DE3932321A1 Multi-chambered bio-reactor for waste water purificn. - is slowly rotated in vat by internal liq. transfers |
| 03/22/1990 | DE3919176A1 Anaerobic breakdown of sludge - by solubilisation of sludge, feeding to anaerobic putrefaction tank etc. |
| 03/22/1990 | DE3832046A1 Process for treating paint mist wash water |
| 03/21/1990 | EP0359698A1 Fine-bubble diffuser, especially for water aeration |
| 03/21/1990 | EP0359025A1 Process for the mesophilic or thermophilic aerobic-enzymatic conditioning of organic substances and biomasses |
| 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 | US4910143 Mixture of Pseudomonas strains |
| 03/20/1990 | US4910010 Anaerobic process; filtering through absorption bed; adding Clostridium bacteria |
| 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 | EP0357960A1 Process and device for purifying waste gases by washing with a suspension of adsorbents |
| 03/14/1990 | EP0357954A1 Process for heat recovery during sludge treatment |
| 03/14/1990 | CN2054457U Multipurpose compound living things filler |
| 03/14/1990 | CN2054456U Multilevel organisms contacting oxidizing tower |
| 03/13/1990 | US4908128 Composite bacteria support medium |
| 03/08/1990 | WO1990002101A1 A process for in situ biodegradation of hydrocarbon contaminated soil |
| 03/08/1990 | WO1990002100A1 Process and device for microbiological water treatment |
| 03/08/1990 | DE3829666A1 Novel Menzel dome aerator having a rubber membrane |
| 03/08/1990 | DE3827716A1 Water treatment in a plant for intensive fish culture |
| 03/07/1990 | EP0357478A1 Apparatus for introducing a gas into a liquid |
| 03/07/1990 | EP0356879A1 Fluidized-bed reactor for biological waste water purification |