Patents
Sitemap › C02 - Treatment of water, waste water, sewage, or sludge › C02F - Treatment of water, waste water, sewage, or sludge › C02F 3 - Biological treatment of water, waste water, or sewage
Patents for C02F 3 - Biological treatment of water, waste water, or sewage (46,453)
11/1989
11/21/1989US4882099 Aeration apparatus havine a deicing mechanism and control circuit therefor
11/21/1989US4882070 Waste water clarification
11/21/1989US4882066 Complexing metals with thin film of chitin which is dispersed on porous solid substrate
11/21/1989US4882059 Solubilization of organic materials in wastewater treatment
11/21/1989US4882058 Organic waste recycling system and method
11/21/1989US4882046 Multi-chamber septic tank assembly
11/16/1989WO1989010900A1 Method and arrangement for water purification
11/16/1989WO1989010898A1 Method of sewage treatment
11/16/1989DE3915026A1 Process for the biologically enhanced removal of the phosphorus content of waste waters
11/15/1989EP0341432A2 Bioactive cage in a sewage treatment basin for reducing the concentration of biological degradable pollutants
11/15/1989EP0341280A1 Process for removing hazardous substances from water or air.
11/15/1989CN1037129A Multiple air layer liquid processing system
11/15/1989CN1037128A Treatment method of the drained waste water in antibiotic production
11/14/1989US4880542 Biofilter for the treatment of sour water
11/14/1989US4880533 Apparatus and system for treating waste water and sludge
11/14/1989US4880445 Oxygen absorption into water, degassing
11/08/1989EP0340567A1 Process for the biological degradation of complex persistent organic matter in waste water
11/08/1989EP0233924B1 Post-clarification device
11/07/1989US4879046 Vertical circulation, air, bubbling, jets
11/07/1989CA1262662A1 Aquarium filter system
11/02/1989WO1989010183A1 Multiple gas phase liquid treatment apparatus
11/02/1989EP0339907A1 Arrangement for the cleaning of waste water
11/02/1989EP0339754A2 Pump/diffuser combination
11/02/1989EP0339457A1 Sewage sludge disinfecting process
11/02/1989EP0339354A1 Method of and apparatus for treatment of sewage screenings
11/02/1989EP0339025A1 Improved process and equipment for purifying treatment and utilization of waste-waters from the dairy industry
11/02/1989DE3917451A1 Process for the biological purification of contaminated waste waters
11/02/1989DE3813386A1 Process and apparatus for the biological removal of nitrogen from waste water
10/1989
10/31/1989US4877736 Aerobic microorganism for the degradation of chlorinated aliphatic hydrocarbons
10/31/1989US4877532 Centrifugal oxygenator and method for treatment of waste water
10/26/1989DE3812499A1 Process and plant for the utilisation of organically polluted waste waters from low-temperature carbonisation plants for organic wastes
10/26/1989DE3812007A1 Extendable anaerobic disposal plant for organic substances
10/25/1989EP0339013A2 Apparatus for waste water treatment
10/25/1989EP0338967A1 Apparatus for treating slurry by gas-liquid contact method
10/25/1989EP0338950A1 Process for microbiological purification and valorisation of an organic effluent containing fermentable sugar
10/25/1989EP0338198A1 Separation vessel for an activated sludge-wastewater suspension
10/25/1989EP0338182A1 Apparatus for waste water treatment
10/25/1989EP0338056A1 Apparatus for prevention of the occurence or proliferation of microorganisms in water for industrial use
10/24/1989US4876288 Dimensionally stable macroporous skeleton of bonded coarse and fine grained components; purification
10/24/1989US4876201 Method for biodegrading PCBS
10/19/1989WO1989009827A1 Microbial degradation of trichloroethylene
10/19/1989DE3811943A1 Method and apparatus for examining waste water (effluent) discharges into waste water channels and bodies of water for heavy metal content
10/19/1989DE3811591A1 Process for treating waste waters
10/19/1989DE3811165A1 Carrier element as growing surface for biomass
10/18/1989EP0336929A1 Method for water purification.
10/18/1989CN2046121U Majorization combination apparatus for treating and reusing sewage
10/18/1989CN1005459B Improved column packing
10/17/1989US4875178 Method to control the discharge of effluent
10/17/1989US4874519 Removal of phosphorus using activated sludge
10/12/1989DE3810843A1 Drive for fully mixed bioreactors
10/12/1989DE3810564A1 Carrier material for microorganisms
10/12/1989DE3809600A1 Process and apparatus for rehabilitation of ground water and/or soil
10/11/1989EP0336718A2 Microbial degradation of trichloroethylene
10/11/1989EP0336281A1 Process for controlling biological clarification stages
10/11/1989CN2045735U Energy-saving oxygen-increasing water-purifying machine
10/11/1989CN1036146A Multilayer porous structure, particularly for separation of liquid and solid phases
10/11/1989CN1005410B Biological purification and purifing equipment of wastewater
10/10/1989US4872986 Use of bacteria for control of algal bloom in wastewater, lagoons, or ponds
10/10/1989US4872985 Distribution onto leaves, stems, roots of aquatic plants causes formation of biofilm; purification
10/05/1989WO1989009193A1 Process for separation
10/05/1989DE3810152A1 Apparatus and process for fish culture
10/05/1989DE3809733A1 Process for water purification
10/04/1989EP0335825A1 Process and device for a two-step anaerobic treatment of liquid substrates
10/03/1989US4871671 Immobilization of biological cells in polytetrafluoroethylene matrix
09/1989
09/28/1989DE3809016A1 Arrangement for introducing gas into liquids
09/28/1989DE3808834A1 Verfahren und vorrichtung zur biologischen reinigung von wasser mit einer verschmutzung an stickstoff- und phosphorverbindungen sowie organischem kohlenstoff Method and apparatus for biological cleaning of water with a contamination of nitrogen and phosphorus compounds and organic carbon
09/27/1989EP0334639A1 Filter Device
09/27/1989EP0334527A2 Slime control for primary filtration systems
09/27/1989EP0333774A1 Conditioning and hygienic treatment of sewage sludge and the like
09/27/1989EP0198073B1 Device for introducing a gas into a liquid
09/27/1989CN2044970U Push-flow type biological rotary disc
09/26/1989US4869824 Bubble plate system for biological purification of air and waste water
09/26/1989US4869819 Adsorption of organic acids produced by fermentation bacteria on a ion exchange separator; desorption by bicarbonate for conversion by methanogenic bacteria
09/26/1989US4869818 Orbital wastewater treatment system with combined surface aerator and submerged impeller
09/26/1989US4869815 Fluidized bed reactor with means for ensuring homogeneous distribution of the fluid to be treated
09/26/1989CA1261709A1 Metal recovery
09/26/1989CA1260911A1 Biological filter media
09/26/1989CA1260633A1 Self-contained sewage treatment system and method
09/21/1989WO1989008617A1 Process and device for biological purification of water contaminated with nitrogen and phosphor compounds and organic carbon
09/21/1989WO1989008616A1 A method and installation for the break-down and recycling of solid urban waste by anaerobic fermentation
09/21/1989DE3808010A1 Waste water purification process
09/21/1989DE3807748A1 Mehrschichtige poroese gefuegekonstruktion, insbesondere zur trennung von fluessigen und festen phasen Multilayer porous gefuegekonstruktion, in particular for the separation of liquid and solid phases
09/21/1989DE3807487A1 Biological and mechanical process for treating contaminated soils
09/20/1989EP0333218A2 Process for the removal of metal ions from aqueous systems
09/20/1989EP0332907A1 Filler for treating liquids, and process for manufacturing it
09/19/1989US4867883 High-rate biological waste water treatment process using activated sludge recycle
09/19/1989US4867871 Sewage system discharge pump module
09/19/1989EP0217854A4 Method for the monitoring and control of microbial populations.
09/19/1989CA1259717A1 Sewage treatment biological rotors
09/19/1989CA1259716A1 Process for the removal of ammoniacal nitrogen in the bod sorption zone of a wastewater treatment plant
09/13/1989EP0332182A1 Method and apparatus for forming small bubbles in liquid
09/13/1989EP0332157A1 Arrangement for joining a distribution device to a fluid supply conduit
09/13/1989EP0332134A2 Alkalophilic, methanogenic bacteria and fermentation method for the fast production of methane
09/13/1989EP0331806A1 Process for the anaerobic purification of waste and process water
09/13/1989CN1035482A Clarificating method of dyeing sewage
09/12/1989CA1259304A1 Motionless mixer for gas/liquid mixing
09/08/1989WO1989007885A1 Device for culture of aquatic animals
09/07/1989DE3805770A1 Apparatus for periodic control of liquid levels
09/06/1989CN1035276A Process for purification of sewage
09/06/1989CN1035275A Water processing method for removing low-concentration organic matters
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