Patents
Patents for C02F 3 - Biological treatment of water, waste water, or sewage (46,453)
10/1994
10/27/1994CA2160451A1 Microorganism of genus bacillus cereus and use thereof
10/27/1994CA2160373A1 Treatment of wastewater and sludges
10/26/1994EP0620756A1 Gas particle formation.
10/26/1994EP0620707A1 A method to combat microbes
10/26/1994EP0539430B1 Bioreactor
10/26/1994EP0530226B1 Method for removing nitrogen from an aqueous solution
10/25/1994US5358671 Aerator device
10/25/1994US5358636 Apparatus for the treatment of waste sludge
10/25/1994CA1332763C Fluidised bed reactor for biological purification of effluent
10/25/1994CA1332719C Microbiological process for the purification and the valorization of an organic effluent containing a fermentable sugar
10/20/1994DE4321552C1 Apparatus and process for the continuous biological purification of waste water - in particular for relatively small and medium-scale businesses
10/19/1994EP0620191A1 Process and apparatus for crude waste water purification with nutrients elimination
10/18/1994US5356570 Apparatus for aerating liquids
10/18/1994US5356537 Method and apparatus for treating waste water
10/18/1994US5356533 Bubbling system
10/13/1994WO1994023134A1 Use of bicarbonates in the biodegradation of hydrocarbon contaminants
10/13/1994WO1994022773A1 Silage-microbial mat system and method
10/13/1994WO1994022772A1 Oxidative method of purifying highly contaminated waste water
10/13/1994WO1994022770A1 Metal removal from aqueous solution
10/13/1994WO1994022605A1 Process for bioremediation of contaminated soil or groundwater
10/13/1994CA2159484A1 Silage-microbial mat system and method
10/13/1994CA2159198A1 Oxidative method of purifying highly contaminated waste water
10/12/1994EP0619132A1 Device for introducing gas in liquids
10/12/1994EP0575314B1 Method and reactor for purification of water
10/12/1994EP0436715B1 Process for separating and/or recovering hydrocarbon oils from water using biodegradable absorbent sponges
10/12/1994CN2179375Y Aerator
10/12/1994CN2179374Y Natural return waste water treatment apparatus
10/12/1994CN1093343A Automatic and quick wastewater purification system by biological method
10/11/1994US5354545 Contacting gaseous effluent with aqueous solution to dissolve sulfur compounds, adjusting concentration of buffers, oxidizing to produce elemental sulfur
10/11/1994US5354471 Aerobic, continuous and sequencing batch processes
10/06/1994DE4332762C1 Process and apparatus for the biological treatment of organically polluted waste water and organic waste
10/06/1994DE4328162A1 Rapid method for determining mass-transport and reaction-kinetic design parameters for anaerobic biofilm reactors
10/04/1994US5352610 Tubular membrane assembly
10/04/1994US5352608 Bioreduction of metal oxides and oxyanions by photosynthetic bacteria
10/04/1994US5352444 Stabilization of biowastes
10/04/1994US5352421 Method and apparatus for effecting gas-liquid contact
10/04/1994US5352391 Gas distributor for small-bubble aeration of water
10/04/1994US5352357 Waste water treatment system
10/04/1994US5352356 Stovepipe decanter apparatus
10/04/1994CA1332249C Waste water treating process
10/03/1994CA2120323A1 Photoconductor for electrophotography
09/1994
09/29/1994WO1994021568A1 Sewage treatment plant
09/29/1994WO1994021567A1 Method and apparatus for pond water clarification and maintenance
09/29/1994WO1994021566A1 Fixed-bed bioreactor and carrier bodies for purifying fluids
09/29/1994WO1994021565A1 Means for continuous digestion of organic matter
09/29/1994WO1994021561A1 Compact clarifier system for municipal waste water treatment
09/29/1994WO1994021394A1 Methods for the biodegradation of environmental pollutants
09/29/1994DE4330422C1 Process and plant for disposing of the contents of multiple chamber ditches and sumps
09/29/1994DE4309686A1 Aeration apparatus for a tank charged with a liquid medium, in particular a sedimentation tank
09/29/1994DE4304782A1 Method for dispersing liquids, suspensions and heterogeneous fluids, and stirring and gas admixture system for implementing the method
09/29/1994CA2158865A1 Method and apparatus for pond water clarification and maintenance
09/29/1994CA2135482A1 Means for continuous digestion of organic matter
09/28/1994EP0616978A1 Process and precipitant for separating organic pollutants from waste water
09/28/1994EP0604588A4 Waste-water treatment system.
09/27/1994USRE34740 Styrene-vinylpyridine copolymer
09/27/1994US5350511 Sewage purification apparatus
09/27/1994US5350507 Contact device and container for a rotating biological contactor
09/27/1994US5350505 Plastic media filter
09/22/1994DE4409375A1 Securing device for an overflow weir in a waste-water (sewage) disposal tank
09/22/1994DE4308920A1 Device for the treatment of biorefuse or the like
09/22/1994DE4308159A1 Process for decreasing the COD load in wastewater
09/21/1994CN2177720Y Bag type reactor for biochemical treatment of organic sewage
09/21/1994CN2177719Y Efficient porous apparatus for treating water
09/21/1994CN1092386A Treatment of highly colored wastewaters
09/20/1994US5348803 Microcapsules and method for degrading hydrocarbons
09/20/1994US5348655 Method for increasing the capacity of sewage treatment plant
09/20/1994US5348654 Co-current packed tower bio-reactor
09/20/1994US5348653 Process for the biological purification of effluent
09/20/1994US5348650 Waste water treatment apparatus
09/20/1994CA1332083C Two-stage wastewater treatment
09/20/1994CA1332082C Microbiological decomposition of chlorinated aliphatic hydrocarbons
09/15/1994WO1994020426A1 Process for biological water purification with integrated buffering
09/15/1994WO1994020425A1 Improved method for purifying waste water using activated sludge to increase purification yields
09/15/1994CA2157795A1 Improved method for purifying waste water using activated sludge to increase purification yields
09/14/1994EP0614525A1 Method and apparatus for monitoring a supply of gas
09/14/1994CN1092043A Microparticle biological filter bed for purifying water
09/13/1994US5346620 Process for waste water treatment by removal of sodium sulfate
09/13/1994US5345620 Composting toilet
09/13/1994CA1332007C Process for activated-sludge treatment of sewage or industrial waste water
09/08/1994DE4409435A1 Apparatus and process for the simultaneous biological elimination of phosphorus and nitrogen from wastewater
09/08/1994DE4314766C1 Compressed-air aeration device for water and wastewater
09/07/1994EP0428747B1 Method and apparatus of filtering medium circulation type for purifying contaminated water
09/07/1994CN1091723A Method for treatment of waste water containing pentaerythritol
09/06/1994US5344563 Circular aeration basin and annular clarifier channels, flow by pumping
09/06/1994US5344562 Biological dephosphatization and (de)nitrification
09/06/1994US5344557 Incubator for biological cleaning of fluids
09/06/1994CA1331897C Process for treating wastewater
09/06/1994CA1331896C Two-stage batch wastewater treatment
09/06/1994CA1331894C Fluidized bed process and apparatus
09/06/1994CA1331893C Fluidized bed process and apparatus
09/06/1994CA1331892C Fluidized bed process and apparatus
09/06/1994CA1331890C Process for treatment of water containing volatile and toxic compounds
09/01/1994WO1994019729A1 Process for operating a sewage water clarification plant and sewage water clarification plant
09/01/1994WO1994019479A1 Substrate bioavailability enhancing agent for use in bioremediation
09/01/1994WO1994019287A1 Method for preventing hydrogen sulfide formation
09/01/1994DE4306844A1 Process for the combined physical/chemical cleaning of waters contaminated with the explosive substances 2,4,6-trinitrotoluene, hexahydro-1,3,5-trinitro-1,3,5-triazine and octahydro-1,3,5,7-tetranitro-1,3,5,7-tetrazine
09/01/1994DE4305754A1 Process for reducing the emissions from furnaces, incinerators and exhaust air systems and for combined elimination of contaminants in pollutant gases and waste waters
08/1994
08/31/1994EP0612704A1 Process for acidifying manure, in which ammonia is fixed and carbon dioxide gas is emitted
08/31/1994EP0612696A1 Method and device for controlled motion of water in water basins
08/31/1994EP0612695A1 Biomass growth control apparatus for fluid bed biological reactor