| Patents for C02F 7 - Aeration of stretches of water (3,263) |
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| 05/07/1996 | US5514267 Apparatus for dissolving a gas into and mixing the same with a liquid |
| 04/16/1996 | US5507950 Purification of outdoor water, elimination of water-bloom |
| 04/09/1996 | US5505840 Chlorinator-filter system for sewage treatment plants |
| 03/28/1996 | DE19537806A1 Rapidly introducing gas into liq., e.g. for water oxygenation |
| 01/10/1996 | EP0690827A1 Method and apparatus for pond water clarification and maintenance |
| 01/02/1996 | US5480593 Subterranean air lift diffuser assembly |
| 12/26/1995 | US5478473 Passing water through floating filter layer provided inside processing chamber with aerobic bacteria to facilitate the growth of flocks of aerobic bacteria; periodically separating flocks and distributing them |
| 12/26/1995 | US5478208 Submersed jet pump method for generating a stream of water |
| 12/21/1995 | WO1995034512A1 Aeration system and method |
| 12/13/1995 | CN2214944Y 动力叶轮式增氧机 Power impeller aerator |
| 12/07/1995 | DE4419127A1 Water floating aeration assembly water outlet driven by internal head of water |
| 09/20/1995 | CN2208041Y Electric oxygen supplier driven by wind |
| 07/13/1995 | DE4400505A1 Improvement of water quality by aeration |
| 06/06/1995 | US5421999 Floating nitrification reactor in a treatment pond |
| 05/23/1995 | US5417550 Submersed jet pump for generating a stream of water |
| 05/04/1995 | DE4337091A1 Method for operating a water aeration system and apparatus, in particular for carrying out the method |
| 04/12/1995 | CN2194356Y Natural aerator |
| 03/16/1995 | WO1995007239A1 Regenerator for oxidation and cleaning of a liquid |
| 03/16/1995 | DE4330856A1 Apparatuses for the introduction as fine bubbles of a pressurised gas and a process for operating these apparatuses |
| 03/15/1995 | CN1027884C Float aerator |
| 03/08/1995 | EP0641744A1 Purifying apparatus |
| 02/22/1995 | EP0639160A1 Method and apparatus for dissolving a gas into and mixing the same with a liquid |
| 02/22/1995 | CN2190112Y Oxygen jet |
| 12/15/1994 | DE4318987A1 Oxygen spring |
| 11/30/1994 | EP0625961A1 Effluent treatment process |
| 11/23/1994 | CN2183366Y Positive-negative pressure high-efficiency oxygen increasing machine |
| 11/22/1994 | CA1333200C Aeration header module |
| 10/27/1994 | WO1994024058A1 Equipment for circulating of water |
| 10/27/1994 | DE4312971A1 Process and apparatus for aerating waters |
| 09/29/1994 | WO1994021567A1 Method and apparatus for pond water clarification and maintenance |
| 09/29/1994 | CA2158865A1 Method and apparatus for pond water clarification and maintenance |
| 09/01/1994 | DE4404024A1 Apparatus for introducing oxygen into water bodies |
| 08/23/1994 | US5340508 Aeration system and method |
| 08/10/1994 | EP0609896A1 Floating water purification device and water purification method |
| 08/09/1994 | US5336399 Apparatus for purifying and activating water |
| 08/02/1994 | CA1331227C Method and apparatus for treating bodies of water |
| 07/19/1994 | US5330639 Mobile water agitating and aerating apparatus |
| 05/24/1994 | US5314619 Method and apparatus for pond water clarification and maintenance |
| 05/18/1994 | EP0222799B2 Process for introducing oxygen into water and device for implementing the process |
| 04/20/1994 | CN2162287Y 离心气液交换机 Gas-liquid centrifugal switch |
| 03/31/1994 | WO1994006720A1 Floating nitrification reactor in a treatment pond |
| 03/10/1994 | DE4229453A1 Water oxygenation appts. - has perforated and profiled plates for increasing air contact time with flowing water |
| 03/08/1994 | CA1327651C Apparatus and method of conditioning stratified water bodies |
| 02/22/1994 | CA1327244C Mobile vortex shield |
| 02/09/1994 | EP0582271A1 Apparatus and process for the treatment of liquids |
| 01/20/1994 | WO1994001212A1 System, method and apparatus for diffusing gas bubbles into a body of water |
| 01/12/1994 | CN1023438C Cultivation apparatus for aquatic production |
| 12/09/1993 | WO1993024415A1 Floating biological contactor |
| 11/25/1993 | WO1993023340A1 Method and apparatus for dissolving a gas into and mixing the same with a liquid |
| 11/25/1993 | WO1993023338A1 Purifying apparatus |
| 11/25/1993 | DE4216484A1 Suction filter for mobile water aeration device - has rotatable filter drum cleaned by internal brush and external scraper and water jet |
| 11/18/1993 | DE4216096A1 Phosphate removal from domestic or agricultural run=off polluted water - by flocculation and froth which can be dome e.g. in installation floating on lake, etc. undergoing treatment |
| 10/26/1993 | US5256309 Pumping a solution of dissolving lime and air |
| 09/09/1993 | DE4206785A1 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@ |
| 09/01/1993 | EP0557630A1 Total water circulating system for shallow water areas |
| 09/01/1993 | CN1075702A Total water circulating system for shallow water a reas |
| 08/20/1993 | CA2061535A1 Total water circulating system for shallow water areas |
| 08/05/1993 | WO1993015026A1 Effluent treatment process |
| 08/05/1993 | CA2128498A1 Effluent treatment process |
| 07/20/1993 | US5228998 Floating biological contactor |
| 07/13/1993 | US5227056 Apparatus for improving the quality of a large amount of water and the quantity of dissolved oxygen therein |
| 06/29/1993 | US5223130 Device for organic neutralization and removal of phosphorus compounds present in water basins |
| 06/23/1993 | EP0547254A1 Apparatus for generating an air/oxygen stream in biological purification plants |
| 06/23/1993 | CN2136693Y Centrifugal oxygenation machine |
| 06/02/1993 | CN1072662A Apparatus for purifying closed natural water area |
| 05/19/1993 | DE4137759A1 Appts. to improve flow in deeper layers of inland and coastal water pref. by aeration - has mixer within rising tube and insertion feed to deliver medium and gas under pressure into lower water levels |
| 05/18/1993 | US5211508 Total water circulation system for shallow water areas |
| 03/31/1993 | EP0478605B1 Device for organic neutralization and removal of phosphorus compounds present in water basins |
| 03/11/1993 | DE4123354C1 Mobile water-aerating or oxygenating equipment - includes delivery pipe with distribution having vertical pipe rotatable about bearing by water streams |
| 02/09/1993 | US5185085 Water craft and method for treating a body of water |
| 01/28/1993 | DE4124779A1 Surface water treatment - converts sediment surface to mineral layer, to separate mud from water |
| 01/21/1993 | DE4123814A1 Water enriching assembly - has primary flow stream over sieve with upwards air flow and dwell zone to be mixed with lower sec. flow to be taken from container |
| 01/07/1993 | EP0521241A1 Apparatus for enriching waters with oxygen |
| 11/03/1992 | US5160438 Method and means of sampling large regions of liquid for pollution or biological activity using bubbles |
| 10/22/1992 | DE4112486A1 Gas distributor with lifting system for aeration of water in pond - has distributor fitted with floats and hinged supports which when in vertical position hold parts requiring maintenance above water |
| 08/06/1992 | DE4103126A1 Diffuser for introducing or removing gas in rivers, lakes, etc. - in which gas is diffused through silicon@ rubber hose which is woven into fabric in which it acts as weft or warp |
| 06/24/1992 | CN1017139B Aeration devices in the water |
| 05/26/1992 | US5116501 Paddlewheel aerator drive mechanism |
| 05/13/1992 | CN2104216U Pure oxygen aeration waste gas treating technology device |
| 04/08/1992 | EP0478605A1 Device for organic neutralization and removal of phosphorus compounds present in water basins. |
| 03/18/1992 | CN1015891B Method for partially purifying water in continous waters |
| 02/25/1992 | CA1296163C Method and apparatus for the treatment of water, especially for the oxygen enrichment of water |
| 02/18/1992 | US5089179 Floating aerator arrangement |
| 02/18/1992 | US5089120 Treatment vessel for bodies of water with laterally adjustable pontoons |
| 01/15/1992 | CN2093174U Pool aeration machine with turbine jetting device |
| 01/07/1992 | US5078923 Aeration apparatus having a deicing mechanism and control circuit therefor |
| 12/25/1991 | CN1015167B Equipment for deep-well aeration treatment of waste water with low energy consumption |
| 12/10/1991 | US5071550 Appartus for cleaning and aeration of open bodies of water |
| 11/13/1991 | CN2088549U Dual-wheel vertical lifting type surface aerator |
| 11/06/1991 | CN2088105U Microbubble aerator |
| 10/30/1991 | CN1014512B Circulating water jet aeration facility for iron and manganese removal from the underground water |
| 10/09/1991 | CN1014231B Oxygen-increasing machine |
| 09/25/1991 | CN2085371U Agitating aeration machine |
| 09/04/1991 | CN2084050U Oversleeve type micropore aerator |
| 08/28/1991 | CN1054054A Pollution treatment and the method and equipment for using waste water |
| 08/22/1991 | DE4005064A1 treating settled anaerobic sludge at base of water bodies - with additives which eliminate or convert toxic pollutants, esp. iron oxide to convert hydrogen sulphide |
| 07/31/1991 | CN1053415A Float aerator |
| 07/24/1991 | EP0437718A1 Floating aerator |
| 07/10/1991 | CN2080515U Multiple broken aereted water treatment apparatus |
| 07/10/1991 | CN2080514U Aerated apparatus of oxidation trench for sewage disposal |