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)
11/1999
11/09/1999US5980755 For controlling performance of fitler bed in liquid filtration system for efficient backwashing and filtration
11/09/1999US5980748 Method for the treatment of a liquid
11/09/1999US5980747 Comprising water, pseudomonas bacterium, alkali metal nitrate and monoammonium phosphate; for degradation of biodegradable material
11/09/1999US5980739 Wastewater treatment method and apparatus
11/09/1999US5980738 Porous polymeric biosupports
11/04/1999WO1999055628A1 Device for biological wastewater treatment
11/04/1999WO1999055623A1 Electrochemical treatment of materials
11/04/1999WO1999055450A1 Oxygenating apparatus, method for oxygenating a liquid therewith, and applications thereof
11/04/1999DE4400149C2 Frei aufstellbare Mehr-Kammer-Hauswasserkläranlage Freestanding multi-chamber-house water treatment plant
11/04/1999DE19819875C1 Fuzzy logic process to regulate and control the ventilation of intermittently operated water treatment
11/03/1999EP0952886A1 Improvded gas-liquid vortex mixer
11/03/1999EP0869920B1 Method and plant for the purification of waste water by the activated sludge method
11/03/1999EP0843652B1 Method for biodepolluting effluents with high concentrations of pollutants, and strain selection process usable with said method
11/03/1999EP0827430B1 Biotechnological purification of ground and water containing heavy metals
11/03/1999EP0703828B1 Process and device for separating suspended substances from fluids
11/03/1999CN2346784Y Membrane separating active sludge treatment equipment
11/03/1999CN2346783Y Far infrared mineralizing water purifying bottle
11/03/1999CN1233972A Modular filtration system
11/03/1999CN1233595A Aeration tank for biological wastewater treatment
11/02/1999US5976888 Method for measuring NOx in biochemical processes
11/02/1999US5976868 Process for the treatment of gases
11/02/1999US5976378 Method and system for removing nitrogen and immobilized microorganisms
11/02/1999US5976377 System and method for the reduction of the biological oxygen demand level of a flowable waste water
11/02/1999US5976376 Sewage treatment process
11/02/1999US5976375 Conditioning of the recycled activated sludge (ras) prior to its return into the aeration tank. the conditioning is typically performed within the sludge return line and involves ras exposure to a waste acidic effluents
11/02/1999US5976374 An aqueous media treatment system which comprises a ventilated bed of discrete filtration material in which is dispersed an aggregation of living organisms which have the ability to maintain at least a surface layer of the bed in an open and
11/02/1999US5976372 Method of treating a biomass in order to remove heavy metals with hydrogen sulphide
11/02/1999US5976365 Biomass growth control apparatus for fluid bed biological reactor
11/02/1999US5975095 Enzymatic detergent composition and method for degrading and removing bacterial cellulose and glycerides
11/02/1999CA2066752C Sanitation system
10/1999
10/27/1999EP0952121A1 Process for purification of waste waters and contaminant spills based on the use of cultivated emergent macrophytes converted into floating cultures
10/27/1999EP0952120A1 Method and plant for purification of metal containing water
10/27/1999EP0952113A2 Plant for the treatment of washing water
10/27/1999EP0951935A2 Method and apparatus of regenerating flat membrane modules for activated sludge
10/27/1999EP0951530A1 Sulphur reducing bacterium and its use in biological desulphurisation processes
10/27/1999EP0951451A1 Secondary sewage treatment system
10/27/1999EP0885175A4 System for removing nutrients from wastewater
10/27/1999EP0885174A4 Biological denitrification of water
10/27/1999CN2345537Y High-efficient energy-saving net biological rotating disk sewage treatment equipment
10/27/1999CN2345536Y Pure-oxygen-jet-flow-compound biological membrance sewage treatment device
10/27/1999CN1233232A Method for sewage treatment in small treatment plants
10/27/1999CN1232796A Normal temperature decomposition process of waste molasses ethanol liquid into clear water
10/27/1999CN1232795A Activated-sludge processing apparatus and method for control of sludge to be returned
10/26/1999US5972220 Aeration of premixed slurry, gravity settling slurry in separate basin where thickening and anaerobic biological denitrification occurs at ph maintained by released nitrogen, nitrification of settled sludge in aerobic digester
10/26/1999US5972219 Concurrently feeding oxygen and waste water into bottom of upflow anaerobic sludge blanket (uasb) reactor to promote growth of aerobic biomass, settling biomass, collecting biogas and discharging treated water from above sludge layer
10/26/1999US5972212 Apparatus for treating organic waste water utilizing microorganisms
10/23/1999CA2269734A1 Method and plant for purification of metals from water
10/22/1999CA2235528A1 Biological process for breaking oil-water emulsions
10/21/1999WO1999052829A1 A method and a device for the treatment of water
10/21/1999WO1999023039A3 Method for treating process waste waters highly charged with ammonium in waste water systems
10/21/1999DE19817312A1 Füllmaterial für Tropfkörper und Verfahren zum Herstellen desselben The same packing material for percolating filters and methods of making
10/21/1999DE19817268A1 Waste water treatment comprising catalytic and biological processes
10/21/1999DE19815460A1 Modular aeration system for waste water treatment process
10/20/1999EP0950640A1 Packing for trickling filters and process for its manufacture
10/20/1999EP0950028A1 Bioremediation of pollutants with butane-utilizing bacteria
10/20/1999EP0950027A1 Biological disk
10/20/1999EP0949948A1 Method and device for continuous filtration of liquids
10/20/1999EP0891303B1 Dual-flow filter for biological effluent purification
10/20/1999EP0880474B1 Reactor for biologically removing organic pollutants from water
10/20/1999CN2344397Y Reactor for simultaneusly treating organic waste water by using anaerobic and aerobic method
10/20/1999CN2344396Y Jet-oscillating liquid-mixing aeration machine
10/20/1999CN2344395Y Sewage treatment plant
10/20/1999CN1231995A Technique of separate treatment for purifying industrial effluent
10/19/1999US5968359 Adding viable yeast to the polluted waters or soils, forming hydrogen sulfide by the viable yeast, then forming sulfides with the heavy metal impurities
10/14/1999WO1999051545A1 Treatment of waste materials
10/14/1999WO1999051532A1 Method and device for anaerobic purification of waste water using the uasb method
10/14/1999WO1999051531A1 Waste treatment system and method
10/14/1999DE19916545A1 Biological filtration and algal control in pond water
10/14/1999DE19915887A1 Sludge and water pumping sequence in two-stage biological waste water
10/14/1999DE19815616A1 Verfahren und Vorrichtung zum Reinigen von Abwasser Method and device for purifying waste water
10/13/1999EP0949209A2 Biological process and anoxic and/or aerobic biological reactor for the purification of liquid residues
10/13/1999EP0949208A1 Packing for fluid-treating trickling filters and process for manufacturing it
10/13/1999EP0949207A1 Process and plant for waste water treatment comprising submerged fixed beds for bacteria growth
10/13/1999EP0949206A1 Process and plant for biological denitrification of waste water
10/13/1999EP0948463A1 Apparatus for the biological purification of waste water
10/13/1999CN2343163Y Ultra-microporous aerator
10/13/1999CN1231651A Method of treating ammonia-comprising waste water
10/13/1999CN1231618A Biodegradation of metal cyanides
10/13/1999CN1231269A Process for treating microorganism in mud and sewage by using wooden flakes
10/12/1999US5965431 Increasing bioavailability of compounds and mixtures by setting temperature of aqueous medium to 45 degrees celsius or higher and using culture of thermophilic bacteria; solvent-free for pollution control
10/12/1999US5965024 Biodegradation under alkaline conditions using an activated sludge containing a wide range of microorganisms, in the absence of carrier materials; waste treatment
10/12/1999US5965023 Hinged cover for use in a clarifier tank
10/12/1999US5965016 Fluidized bed aquarium filtration system
10/09/1999CA2228819A1 Waste treatment
10/07/1999WO1999050193A1 Wastewater treatment method for removing organic matter and nitrogen, carrier used thereof and method for manufacturing the carrier
10/07/1999WO1999050192A1 A method and plant for purification of a contaminated water and use of a contaminated water for watering purposes
10/07/1999DE19832640C1 Inoculum for biological treatment of industrial waste waters, especially laundry waste water - produced by aerobic treatment of dairy waste water
10/07/1999DE19818274A1 Biological aerobic waste water treatment assembly
10/07/1999DE19814819A1 Kreiselbelüfter Aerators
10/07/1999DE19812520A1 Waste water and sewage anaerobic cesspool incorporates modular control
10/06/1999EP0947473A1 Aerator, combination of an aerator and a holding device and method for replacing an aerator
10/06/1999EP0947472A1 Gyroscope-aerator
10/06/1999EP0947471A1 Aerating device for water and method for manufacturing an aerator
10/06/1999EP0946433A1 Method for eliminating phosphorus contained in effluents
10/06/1999EP0946432A1 Waste water purification process
10/06/1999EP0946431A1 Groundwater remediation with microporous diffusor
10/06/1999EP0946430A1 A diffuser for aerating a fluid
10/06/1999EP0946429A1 Miniature waste-water treatment system for cleaning of waste-water from one or more households and the like
10/06/1999EP0946427A1 Biochemical media system for reducing pollution
10/06/1999EP0946241A1 Waste water treatment plant
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