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)
08/1981
08/11/1981US4283357 Device for distribution of a gas in a liquid medium
08/05/1981EP0033113A1 Process and apparatus for the biological purification of waste water
08/04/1981US4282172 Static, for use within water tank of ozonator
08/04/1981US4282102 Activated sludge wastewater treatment having suspended inert media for biota growth
08/04/1981CA1106509A1 Aerator
08/04/1981CA1106301A1 Single stage process for continuously introducing oxygen containing gases into sewage containing activatd sludge or fermentation broths
07/1981
07/28/1981US4280911 Propelled-type aeration of wastes
07/28/1981US4280910 Method and apparatus for controlling aeration in biological treatment processes
07/22/1981EP0032235A1 Apparatus for the introduction of a gas into a liquid
07/21/1981US4279842 For aeration waste treatment
07/21/1981US4279754 Means for separation of gas and solids from waste mixed liquor
07/21/1981US4279753 Films of microorganisms
07/21/1981CA1105624A1 Flow-control apparatus and process for an oxidation ditch
07/15/1981EP0031896A1 Method and apparatus for biologically treating waste water
07/14/1981US4278547 Conservation of momentum in a barrier oxidation ditch
07/14/1981US4278546 Treatment of a liquid by circulation and gas contacting
07/14/1981CA1105159A1 Process for the treatment of waste water
07/14/1981CA1104795A1 Odorous gas purification
07/08/1981EP0031332A1 Waste disposal apparatus.
07/07/1981US4277346 Adsorption by solid solution of calcium compound and aluminum oxide or hydroxide
07/07/1981US4277342 Treatment of municipal sewage sludge
07/07/1981US4277341 Water treatment discharge means
07/01/1981EP0031258A1 A bubble column with draft device
07/01/1981EP0030955A1 A device for flushing and aerating a surface coated with microorganisms in a plant for biological purification of waste water.
06/1981
06/30/1981US4276174 Control of sludge temperature in autothermal sludge digestion
06/30/1981US4276164 Leachate, landfill
06/30/1981EP0027447A4 Gas diffuser, aerator, or sparger apparatus and method.
06/25/1981WO1981001701A1 Improved anaerobic and aerobic digestion of waste and biomass by use of lactobacillus culture additives
06/25/1981WO1981001700A1 Method and apparatus for dissolving gas in a liquid
06/23/1981US4275020 Pressurized
06/23/1981US4274966 Method and device for purifying sewage
06/23/1981US4274955 Biodegradation with sporothrix fungi
06/23/1981US4274954 Biodegradation with pseudomonas
06/23/1981US4274838 Anaerobic digester for organic waste
06/17/1981EP0030485A1 Process and apparatus for biological treatment of waste water in a single vessel in two zones
06/16/1981US4273732 Method and apparatus for raising an aeration apparatus for liquids
06/16/1981US4273731 Gas/liquid exchange apparatus
06/16/1981US4273615 Anaerobic digestion, explosion
06/16/1981CA1103375A1 Treatment of biodegradable material
06/09/1981US4272461 Apparatus for mixing gases with liquids
06/09/1981US4272379 Transferring of excess waste to collection vessel, overflow with recirculation
06/09/1981US4272375 Long vertical shaft bioreactor of simplified design
06/09/1981US4272374 Apparatus for treating wastewater
06/09/1981US4272016 Integrated sewage treatment system
06/09/1981CA1102934A1 Method of transmitting liquid between separated activation compartments for biological purification of water and apparatus for performing the same
06/02/1981US4271099 Apparatus for thorough mixture of a liquid with a gas
06/02/1981US4271026 Control of activated sludge wastewater treating process for enhanced phosphorous removal
06/02/1981US4271013 Method and apparatus for removing biodegradable compounds from wastewater
05/1981
05/27/1981EP0029066A1 On-site wastewater treatment system.
05/26/1981US4269719 Immersion of part of slowly-rotating disks into slurry; adhesion; evaporation; scraping; settling; sewage treatment
05/26/1981US4269714 Sewage treatment; fluid energy milling the sludge without destroying the cells; adsorption; oxidation; flocculation; low residue; high speed
05/26/1981US4269709 Waste water treatment system with aeration and circulation means
05/26/1981CA1102020A1 Method and apparatus for the treatment of sewage
05/20/1981EP0028846A1 Process for preparing biomass attached to a carrier
05/20/1981EP0028728A1 Device for aerating water with fine air bubbles
05/19/1981US4268389 Marine type; aerator, clarifier, disinfector
05/19/1981US4268385 Centrifugal rotating disc assembly for biological waste water treatment apparatus
05/19/1981CA1101567A1 Biological water treatment process
05/13/1981EP0028360A1 A process to build up defined phosphate deposits from waste phosphates
05/12/1981US4267130 Portable auxiliary cooling tower
05/12/1981US4267052 Aeration method and apparatus
05/12/1981US4267051 Method and apparatus for aerating water
05/12/1981US4267050 Water treatment
05/12/1981US4267049 Comprising hydrolysis by enzymes and enzyme-producing microorganisms
05/12/1981US4267038 Harvesting algae from wastewater treatment process
05/12/1981CA1101138A1 Aerator
05/12/1981CA1100905A1 Sewage osmosis system
05/06/1981EP0028094A1 Long vertical shaft bioreactor and method of protecting it against extreme surges of influent waste water
05/06/1981EP0028093A1 Method and apparatus for the separation of gas and solids from waste mixed liquors
05/06/1981EP0028053A1 Closed apparatus for preparing biogas from manure
05/06/1981EP0028050A1 Reactor for anaerobic fermentation of waste water
05/06/1981EP0027998A1 Process for reabsorption and retention of phosphorus by activated biomass
05/06/1981EP0027912A1 Apparatus for contacting liquid with a gas
05/06/1981EP0027911A1 Apparatus for contacting liquid with a gas
05/05/1981US4266035 Pseudomonas aeruginosa
05/05/1981US4266033 Cellulose fermentation process
05/05/1981US4266029 Enzyme immobilization
04/1981
04/29/1981EP0027694A1 Composition and method for stimulation of aerobic bacteria
04/29/1981EP0027447A1 Gas diffuser, aerator, or sparger apparatus and method
04/28/1981US4264740 Apparatus for treating residual water
04/28/1981US4264448 With lactobacilli admixed with carbohydrates
04/28/1981CA1100240A1 Method and apparatus for aerobic sewage treatment
04/21/1981US4263143 Process and apparatus for dispersing gas in a liquid
04/21/1981US4263142 Process and system for purifying water
04/21/1981CA1099832A1 Waste disposal
04/21/1981CA1099831A1 Wastewater treatment
04/21/1981CA1099830A1 Process and system for controlling an oribital system
04/21/1981CA1099829A1 Waste water purifying procedure
04/15/1981EP0026938A1 Control of activated sludge wastewater treating process for enhanced phosphorus removal
04/14/1981US4261933 Diffusion element
04/14/1981US4261932 Oxygenation or ozonization of water
04/14/1981US4261825 Oxidation tank for sewage treatment apparatus
04/08/1981EP0026619A1 Anaerobic digester for organic waste
04/08/1981EP0026493A1 Apparatus for contacting a liquid with a gas
04/07/1981US4260486 Flow-control apparatus and process for an oxidation ditch
04/07/1981US4260462 Process for separating acid gases and ammonia from dilute aqueous solutions thereof
04/07/1981CA1099037A1 Process and apparatus for sewage purification by activated sludge technique
04/01/1981EP0025813A1 Apparatus for water purification and/or aeration by dissolved gas flotation
03/1981
03/31/1981US4259444 Microorganisms having multiple compatible degradative energy-generating plasmids and preparation thereof
03/31/1981US4259267 Aeration apparatus by means of vortex action
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