Patents
Patents for C02F 3 - Biological treatment of water, waste water, or sewage (46,453)
10/1993
10/13/1993CN1022401C Treatment of restaurant sewage
10/13/1993CN1022383C Pool for purifying water
10/12/1993US5252616 Process for the manufacture of filler-modified polyurethane foam supports for bioconversion processes
10/12/1993US5252483 Degradation of ferric chelates by a pure culture of agrobacterium sp.
10/12/1993US5252231 Washing cycle by feeding the air, agitating, separating through sedimentation according to the difference in volumic mass
10/12/1993US5252215 Adsorbent materials and use thereof
10/12/1993US5252214 Biological dephosphatization and (de)nitrification
10/11/1993CA2093597A1 A microorganism fertilizer, a method for manufacturing the microorganism fertilizer, and a method for utilizing the microorganism fertilizer
10/10/1993CA2093765A1 Process for the biological treatment of wastewater
10/07/1993DE4244612A1 Rotting tank bio-gas take=off - has controlled extraction rate to maintain inner pressure at ambient levels for tank which is not hermetically sealed
10/07/1993DE4239184C1 Biological sewage phosphate removal - has initial stripper centrally in the stripper basin with separate zones for sludge to move in opposite directions
10/06/1993EP0564386A1 Process and installation for sludge treatment by combined chemical and biological oxidation
10/06/1993EP0564298A1 Method for treating organic sludge
10/06/1993EP0563508A1 Apparatus for fine-bubble aeration of waste water
10/06/1993EP0563434A1 Digester including sludge recirculator with gas supplement
10/06/1993CN2143226Y Two stage fermenting apparatus with anaerobe
10/06/1993CN2143225Y Converting air-liquid pressure contacting oxidizing column
10/05/1993US5250102 Forming soluble sulfates
10/05/1993US5249359 Process for manufacturing finely structured bodies such as heat exchangers
10/04/1993CA2092501A1 Method for biodegrading acrylic monomers and acrylic oligomers by microorganisms
10/01/1993CA2075349A1 Digester including sludge recirculator with gas supplement
10/01/1993CA2064402A1 Flat bed reactor for biological cleaning of solids contaminated with toxic substances
09/1993
09/30/1993WO1993019013A1 Apparatus for activation of a digesting agent
09/30/1993WO1993019012A1 A device for purifying sewage
09/30/1993WO1993018800A1 Use of immobilized film reactor
09/30/1993DE4235330C1 Aquarium filter - has mechanical cleaning stage and biological cleaning stage with moving bed of plastics granules for growing bacteria
09/30/1993DE4210295A1 Ground and surface water decontamination - using lances in drillings with their upper ends flush with the ground to deliver decontaminating soln.
09/30/1993CA2138271A1 Use of immobilized film reactor
09/29/1993EP0562466A1 Method for simultaneous biological removal of nitrogen and of corresponding biomasses
09/29/1993EP0561889A1 Process for the removal of sulphur compounds from gases.
09/29/1993EP0561887A1 Improved waste water treatment.
09/28/1993US5248424 Frameless array of hollow fiber membranes and method of maintaining clean fiber surfaces while filtering a substrate to withdraw a permeate
09/28/1993US5248423 Process for the regulation of a device for the removal of pollutants from waste water
09/28/1993US5248422 Process for treating wastewater to remove BOD and nutrients
09/28/1993US5248419 Sewage sludge treatment with gas injection
09/28/1993CA1322519C Method of cleaning exhaust gas of drying plants and an apparatus for implementing such method
09/23/1993DE4208370A1 Prodn. of very fine gas bubbles from high-pressure gasified liq. - involves subjecting liq. to pressure considerably below its vapour pressure
09/22/1993EP0561458A1 Process and apparatus for the purification of water
09/22/1993EP0560981A1 System for treating organic wastes and waste water
09/22/1993EP0560980A1 Membrane bioreactor system for treating synthetic metal-working fluids and oil-based products
09/22/1993EP0542755A4 Rotating biological aquarium filter system
09/22/1993CN2142459Y Hole helicoid
09/22/1993CN1076488A Method for preparation of polyvinyl alcohol microbe or enzyme immobilization carrier and its use
09/21/1993US5246585 Anaerobic and aerobic biodegradation
09/21/1993US5246584 Method and apparatus for destroying organic contaminants in aqueous liquids
09/16/1993WO1993017974A1 Effluent treatment systems
09/16/1993WO1993017971A1 Materials and methods for enhanced photocatalyzation of organic compounds
09/16/1993WO1993017970A1 Enzymatic processing of materials containing chromium and protein
09/16/1993DE4208120A1 Microorganism carrier for anaerobic processing of sewage - comprises old tyres
09/16/1993DE4207819A1 Technological use of fixed biological catalysts - in which catalyst is fixed to removable rotatable cylinder mounted in outer vessel
09/16/1993DE4207560A1 Simultaneous removal of carbonate and denitrification of water - using calcium hydroxide as precipitant and biomass, supported on pptd. calcium carbonate, as denitrifying agent
09/15/1993EP0560725A1 Process for purifying water
09/15/1993EP0559857A1 Aerator for a liquid-filled basin.
09/15/1993EP0386163B1 Process for separation
09/14/1993US5244574 Liposomes
09/09/1993DE4206785A1 Silicone elastomer hose for oxygenation of water, esp. in ponds. etc. - has outer dia. of greater than 4.5 mm and wall thickness not less than 0.5 mm, and expands to twice dia. under pressure of oxygen@
09/09/1993DE4206646A1 Industrial and communal sewage cleaning - by using a powder adsorption material mixt. with different cleaning functions to give sepd. clear water and sludge which is dried for recycling
09/08/1993EP0559543A1 Process for the biological purification of effluents with a high concentration of ammoniacal nitrogen
09/08/1993EP0558745A1 Sewage purifying device of filter material circulation type
09/08/1993EP0558568A1 A method for treating an organic substance
09/08/1993CN1075939A Method of and apparatus for treating of sewage and waste water by useing of fibriform biological film
09/08/1993CN1075938A Membrane bioreactor system for treating synthetic metal-working fluids and oil-based products
09/07/1993US5242626 Process for contacting gas and liquid
09/07/1993US5242600 Water treatment by flotation
09/07/1993US5242593 Method for reducing the build-up of slime and/or film in water circulation systems
09/07/1993US5242592 Controlling oxygen supply in response to phosphate concentration independent of turbidity
09/07/1993CA1321967C Production of cyanide hydratase
09/07/1993CA1321966C Production of cyanide hydratase
09/02/1993WO1993017193A1 Tensioned membrane cladding system
09/02/1993WO1993016962A1 Apparatus for the purification of cyanide-containing waste water
09/02/1993WO1993016958A1 Sludge treatment or destruction of the cellular structure of microorganisms by ultra-sounds
09/02/1993WO1993016792A1 Process and reaction particles for carrying out reactions
09/02/1993WO1993016781A1 Decanting apparatus
09/02/1993DE4206147A1 Aeration of pond with venting diaphragm body - for blowing in large quantity of air or oxygen@
09/02/1993CA2157035A1 Apparatus for the purification of cyanide containing waste water
09/01/1993EP0558421A1 Process and device for the depuration of animal excrements
09/01/1993EP0558360A1 Process for bacterial treatment of circuits in paper industry contaminated with flora
09/01/1993EP0557922A1 Liquid treatment method and apparatus
09/01/1993EP0557630A1 Total water circulating system for shallow water areas
09/01/1993CN1075698A Bio-active coal filtering material and its application
09/01/1993CN1075665A Method to implement reaction and reaction particles
09/01/1993CN1021964C Denitrifying method of high nitrogen-containing sewage and its equipment
08/1993
08/31/1993US5240611 Organic waste recycling system and method
08/31/1993US5240600 Water and wastewater treatment system
08/31/1993US5240599 Apparatus for treatment of waste water sludge
08/31/1993US5240598 Microbubble generator for the transfer of oxygen to microbial inocula and microbubble generator immobilized cell reactor
08/31/1993US5240597 Waste water treatment equipment
08/29/1993CA2086859A1 Sewage treatment equipment with activated sludge process bed
08/26/1993DE4205739A1 Verfahren zur zerstoerung zellulaerer strukturen von suspensionen von mikroorganismen durch ultraschall, insbesondere von schlaemmen aus biologischen klaeranlagen Method for the destruction of cellular structures of suspensions of micro-organisms by ultrasound, especially sludges from biological treatment plants
08/26/1993DE4205686A1 Gas exchange appts. - has eddy unit for media flow to give fluid where gas can be exchanged
08/26/1993DE4205572A1 Verfahren und reaktionsteilchen zur durchfuehrung von reaktionen Procedures and reaction particles for carrying out reactions
08/26/1993DE4136445A1 Verfahren zur regulierung und/oder zum abbau von unerwuenschten viskositaets und csb-werten in lackkoagulationswaessern Process for the regulation and / or eliminating unwanted viscosity and csb-priced in lackkoagulationswaessern
08/25/1993EP0557266A1 Device for introducing gas in liquids
08/25/1993EP0556362A1 Method and device for the filtration of a liquid containing suspension particles.
08/25/1993EP0556315A1 Means and method for enhancing plant growth under field conditions
08/25/1993CN2140901Y Series combined device for treatment of waste water
08/24/1993US5238572 Enzyme treatment for industrial slime control
08/24/1993US5238560 Washable filter
08/22/1993CA2089935A1 Process and system for increasing the gas uptake by a liquid being aerated
08/19/1993WO1993016006A1 Sewage treatment apparatus