WO1997022562A1 - Dispositif d'aeration - Google Patents

Dispositif d'aeration Download PDF

Info

Publication number
WO1997022562A1
WO1997022562A1 PCT/AU1996/000797 AU9600797W WO9722562A1 WO 1997022562 A1 WO1997022562 A1 WO 1997022562A1 AU 9600797 W AU9600797 W AU 9600797W WO 9722562 A1 WO9722562 A1 WO 9722562A1
Authority
WO
WIPO (PCT)
Prior art keywords
passage
fluid
flow
liquid
water
Prior art date
Application number
PCT/AU1996/000797
Other languages
English (en)
Inventor
David Bruce Bragg
Original Assignee
Inglewood Technologies Pty. Ltd.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from AUPN6956A external-priority patent/AUPN695695A0/en
Priority claimed from AUPN8383A external-priority patent/AUPN838396A0/en
Application filed by Inglewood Technologies Pty. Ltd. filed Critical Inglewood Technologies Pty. Ltd.
Priority to AU10642/97A priority Critical patent/AU1064297A/en
Publication of WO1997022562A1 publication Critical patent/WO1997022562A1/fr

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F3/00—Biological treatment of water, waste water, or sewage
    • C02F3/02—Aerobic processes
    • C02F3/12—Activated sludge processes
    • C02F3/1278—Provisions for mixing or aeration of the mixed liquor
    • C02F3/1294—"Venturi" aeration means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F25/00—Flow mixers; Mixers for falling materials, e.g. solid particles
    • B01F25/20—Jet mixers, i.e. mixers using high-speed fluid streams
    • B01F25/21—Jet mixers, i.e. mixers using high-speed fluid streams with submerged injectors, e.g. nozzles, for injecting high-pressure jets into a large volume or into mixing chambers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F25/00—Flow mixers; Mixers for falling materials, e.g. solid particles
    • B01F25/30—Injector mixers
    • B01F25/31—Injector mixers in conduits or tubes through which the main component flows
    • B01F25/312—Injector mixers in conduits or tubes through which the main component flows with Venturi elements; Details thereof
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F25/00—Flow mixers; Mixers for falling materials, e.g. solid particles
    • B01F25/30—Injector mixers
    • B01F25/31—Injector mixers in conduits or tubes through which the main component flows
    • B01F25/312—Injector mixers in conduits or tubes through which the main component flows with Venturi elements; Details thereof
    • B01F25/3124—Injector mixers in conduits or tubes through which the main component flows with Venturi elements; Details thereof characterised by the place of introduction of the main flow
    • B01F25/31242—Injector mixers in conduits or tubes through which the main component flows with Venturi elements; Details thereof characterised by the place of introduction of the main flow the main flow being injected in the central area of the venturi, creating an aspiration in the circumferential part of the conduit
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F7/00—Aeration of stretches of water
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F23/00—Mixing according to the phases to be mixed, e.g. dispersing or emulsifying
    • B01F23/20—Mixing gases with liquids
    • B01F23/23—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F33/00—Other mixers; Mixing plants; Combinations of mixers
    • B01F33/80—Mixing plants; Combinations of mixers
    • B01F33/81—Combinations of similar mixers, e.g. with rotary stirring devices in two or more receptacles
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W10/00—Technologies for wastewater treatment
    • Y02W10/10—Biological treatment of water, waste water, or sewage
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W10/00—Technologies for wastewater treatment
    • Y02W10/30—Wastewater or sewage treatment systems using renewable energies
    • Y02W10/37—Wastewater or sewage treatment systems using renewable energies using solar energy

Definitions

  • This invention relates to an aeration device.
  • it is directed to an aeration device for use in a body of water or other liquid for introducing oxygen or other gaseous fluids into the water or other liquid.
  • bodies of liquid such as dams, lakes, effluent ponds or the like are subject to build up of algae and other polluting growths. This particularly occurs in effluent dams or ponds where large levels of nutrients can exist.
  • the above devices have not proved successful and/or require regular maintenance.
  • the devices are inefficient in both producing dissolved oxygen and de- stratifying the liquid column. It is thus a general object of the present invention to overcome, or at least ameliorate, one or more of the above disadvantages and to provide an aeration device which enables oxygen, air, other fluids or mixtures of fluids to be introduced effectively into a body of water or other liquid.
  • an aeration device comprising a housing adapted to be submerged in a body of liquid, said housing including a flow means to allow flow of a first fluid therethrough wherein said flow means includes entrainment means for entraining a gaseous fluid into said first fluid for subsequent introduction into said liquid.
  • the entrainment means for introducing the gaseous fluid into the flow means includes means for creating a back ⁇ pressure in the flow means.
  • means is provided for communicating the flow means with the atmosphere of the surrounding environment such that the back pressure created in the flow means draws in gaseous fluid from the atmosphere into the flow means and the first fluid flowing therethrough.
  • the means for communicating the flow means with the atmosphere includes a duct which extends in use to the surface of the liquid.
  • means is provided for supporting the duct above the surface level of the liquid. More preferably, such means is in the form of a float.
  • the flow means incorporates a venturi for creation of the back pressure to draw gaseous fluid into the flow means.
  • means is provided for limiting the flow of the first fluid into the flow means. More preferably, the means comprises a jet or nozzle. Most preferably, the jet or nozzle is located upstream of the venturi.
  • the duct is connected to the flow means at a position between the jet and venturi.
  • means are provided for supporting the aeration device on the bottom of the lake, dam or other body of water or other liquid. More preferably, the means is a platform on which the device is supported.
  • the first fluid is water or other liquid and the gaseous fluid is air or oxygen. More preferably, the first fluid is water and the gaseous fluid is air.
  • the flow means includes a first passage for flow of a first fluid therethrough and at least one second passage intersecting said first passage so that a proportion of said first fluid flowing into said first passage flows through said second passage.
  • the second passage extends at substantially 45° to the first passage which is disposed substantially horizontally in use. This angle, however, may be varied depending upon the direction of flow output required in the device.
  • a number of second passages may be provided for communication with the first passage such that flow output occurs in a number of different directions.
  • the flow means includes a single passage in said housing through which the first fluid flows.
  • Optional features of the aeration device of the present invention include:
  • An inlet coupling for coupling the flow means to a source of the first fluid may be from a pump located, for example, on the shoreline of the body of the liquid.
  • the source of gaseous fluid may be a compressor or blower.
  • An outlet coupling for connecting the device to a further device may be detachable. This permits the device to be used as a single unit by removing the outlet coupling and replacing it with a plug. Alternatively, a plurality of such devices may be provided to be interconnected in series and located in use, on the bottom of the lake, dam or other body of water or other liquid. For this purpose, the outlet coupling of one device is connected through a hose or the like to an inlet coupling of an adjacent device.
  • Figure 1 illustrates in perspective view a first embodiment of an aeration device according to the present invention for use with a body of water
  • Figure 2 is an exploded sectional view of the device of Figure 1;
  • FIG. 3 illustrates the manner in which the device of Figures 1 and 2 may be used.
  • Figure 4 illustrates in exploded sectional view a second embodiment of an aeration device according to the present invention for use with a body of water.
  • an aeration device 10 comprising a housing 11 which is substantially solid and which includes a main water flow passage 12 having inlet and outlet ends 13 and 14 which are connected to respective couplings 15 and 16 for coupling to a source of water.
  • the ends 13 and 14 are internally threaded to receive a corresponding thread of the couplings 15 and 16.
  • a second passage 17 Intersecting the main flow passage 12 and extending at 45° to the main passage 12 is a second passage 17 which has a smaller diameter portion 18 connected to the main passage 12 and a larger diameter internally threaded trailing portion 19 in which is located a venturi unit 20, the venturi unit 20 having a threaded end 21 for threaded engagement with the thread in the trailing passage portion 19.
  • a removable jet or nozzle 22 is provided at the junction between the passage portions 18 and 29 for restricting the flow of water into passage 17 to create a back pressure downstream of the jet or nozzle 22.
  • the venturi unit 20 is of conventional form having a throat adjacent to the jet 22.
  • a small diameter passage 23 extends from the passage portion 19 adjacent to the jet 22 outwardly to an internally threaded coupling 25.
  • a duct in the form of an air tube 26 is connected to the coupling 25 and extends in use above the surface of the body of the water flowing through the venturi unit 20.
  • the housing 11 includes opposite end mounting flanges 27 suitably apertured as at 28 for mounting of the device 10 as described further below.
  • the inlet coupling 15 is connected to a supply of water and the device 10 is submerged. Water is then caused to flow along the main passage 12 as indicated by the arrows in Figure 2. A portion of the water flow also passes into the passage portion 18 and through the jet 22 and venturi unit 20 to thereby create a back pressure in the region 29. This causes air to be drawn in through the passage 23 and duct 26 from the atmosphere. The air is thus introduced into the water flowing through the venturi unit 20 in the form of air bubbles which are thereby passed into the body of water in which the device 10 is submerged through the outlet of the venturi unit 20.
  • a number of devices 10 can be connected in series in the manner shown in Figure 3 by means of hoses or pipes 30 which are connected between the outlet coupling 16 of one device 10 and the inlet coupling 15 of an adjacent device 10.
  • each device 10 is located adjacent to the water's edge and at a required spacing.
  • a hose 31 is also provided to connect the end device 10 to a pump.
  • the pump is associated with a filtration unit (not illustrated).
  • Each device 10 is also connected so that it faces in the same direction.
  • the air tubes 26 are also cut or otherwise provided such that their upper ends will always remain above the water level.
  • the upper ends of the tubes 26 are connected to floats 32 which may be of any shape or configuration, for example, in the shape of a duck.
  • Each device 10 is also mounted on a platform 33 of substantially planar form such that, when lowered into the water, the devices 10 will maintain a stable upright position.
  • the devices 10 and associated platforms 33 may then be located at their required positions in the body of water and submerged.
  • the pipe 31 is then supplied with water from its associated pump.
  • the end device of a series of devices has its outlet plugged or alternatively connected to a ring main for recirculation back to the pump.
  • Each device 10 creates, through the venturi unit 20, a flow of water out of the venturi unit which contains small air bubbles to create dissolved oxygen in the water.
  • the devices 10 are installed on the bottom of the water body, thermal destratification of the water occurs.
  • the outlet from the venturi units 21 is directed upwardly, water and air bubbles are forced upwardly to allow circulation of the whole water body. This ensures that silt or sludge on the bottom of the water body is not stirred up.
  • the devices 10 are preferably positioned so as to circulate the water in a clockwise manner, whilst in the northern hemisphere, the devices 10 may be arranged to circulate water in the opposite direction.
  • Total circulation of water is achieved in operation as the sun-warmed surface water is thoroughly mixed with the colder bottom water. As dissolved oxygen levels are increased, aerobic bacteria is given the chance to re-establish a balance in the body of water and thus enhance the biodegrading process of any organic matter present therein.
  • the configuration of the device 10 may be substantially changed from that shown and described.
  • the passage 17 may be arranged at other than 45° to the main flow passage 12 and if desired a series of passages 17 carrying venturi units 20 may extend at different angles from the main passage 12.
  • Each platform 33 may also carry more than one device 10.
  • the passage 23 has a diameter of 2mm such that the air bubbles introduced into the liquid are small to ensure efficient oxygen transfer. This dimension however may be varied depending upon the application.
  • an alternative aeration device 40 comprising a housing 41 which includes a water flow passage 42 which includes a smaller diameter portion 48 near one end 43 thereof.
  • the passage 42 extending from the other end 49 of the housing 41 is internally threaded in which is located a venturi unit 50, the venturi unit 50 having a threaded end 51 for threaded engagement with the passage 42.
  • a removable jet or nozzle 52 is provided near the portion 48 for restricting the flow of water into passage 42 to create a back pressure downstream of the jet or nozzle 52.
  • the venturi unit 50 is of conventional form having a throat adjacent to the jet 52.
  • a small diameter passage 53 extends from the passage portion adjacent to the jet 52 outwardly to an internally threaded coupling chamber 54 which is adapted to receive an air tube coupling 55.
  • An air tube 56 is connected to the coupling 55 and extends in use above the surface of the body of the water to enable introduction of atmospheric air into the water flowing through the venturi unit 50.
  • the device 40 is submerged and water is then caused to flow along the main passage 42 as indicated by the arrows in Figure 4.
  • the water flowing through the passage portion 48 and through the jet 52 and venturi unit 50 create a back pressure in the region 59.
  • This causes air to be drawn in through the passage 53 and duct 56 from the atmosphere.
  • the air is thus introduced into the water flowing through the venturi unit 50 in the form of air bubbles which are thereby passed into the body of water in which the device 40 is submerged through the outlet of the venturi unit 50.
  • the source of air is provided by a blower which introduces atmospheric air into the supply hoses. Atmospheric air is preferred in these situations as compressors can sometimes introduce contaminants into the body of water. Frictional losses with compressed air are also higher. With the use of air blowers, the system is suitable for use in remote locations where power may be provided by solar energy.
  • the device of the invention may be made in any size to suit the water or other liquid body in which it is used.
  • the device is made of a plastics material and is particularly suited to injection moulding.
  • the device may be used in any liquid environment including salt water, effluent and other chemical-contaminating environments.
  • the present invention thus provides an aeration device which is durable, long lasting with no moving parts and requires little maintenance.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Hydrology & Water Resources (AREA)
  • Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Water Supply & Treatment (AREA)
  • Organic Chemistry (AREA)
  • Biodiversity & Conservation Biology (AREA)
  • Microbiology (AREA)
  • Aeration Devices For Treatment Of Activated Polluted Sludge (AREA)

Abstract

Cette invention concerne un dispositif d'aération (10) utilisable dans un bassin contenant de l'eau ou un autre liquide, du type barrage, lac, bassin de retenue d'effluents ou analogues, ledit bassin étant sujet à la formation d'algues ou à d'autres proliférations d'organismes polluantes et ledit dispositif étant conçu pour introduire de l'oxygène ou d'autres fluides gazeux dans l'eau ou autre liquide. Selon une réalisation préférée, ledit dispositif (10) comporte un habitacle (11) que l'on immerge à l'intérieur du bassin. Cet habitacle comporte un premier passage (12) à travers lequel l'eau peut s'écouler, et au moins un deuxième passage ayant un point d'intersection avec le premier passage (12) qui permet à une partie de l'eau s'écoulant à l'intérieur du premier passage (12) de passer à travers le deuxième passage (17). Ce deuxième passage (17) comporte des organes (20, 22) conçus pour entraîner de l'air à l'intérieur de l'eau qui s'écoule dans le deuxième passage (17) puis passe à l'intérieur du bassin. Selon une autre réalisation, ledit dispositif (40) comporte un habitacle (41) muni d'un passage unique (42) destiné à l'écoulement de l'eau. Un certain nombre de ces dispositifs (10, 40) peuvent être montés en série.
PCT/AU1996/000797 1995-12-05 1996-12-05 Dispositif d'aeration WO1997022562A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU10642/97A AU1064297A (en) 1995-12-05 1996-12-05 An aeration device

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
AUPN6956A AUPN695695A0 (en) 1995-12-05 1995-12-05 Aeration apparatus
AUPN6956 1995-12-05
AUPN8383A AUPN838396A0 (en) 1996-03-01 1996-03-01 Aeration apparatus
AUPN8383 1996-03-01

Publications (1)

Publication Number Publication Date
WO1997022562A1 true WO1997022562A1 (fr) 1997-06-26

Family

ID=25645074

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/AU1996/000797 WO1997022562A1 (fr) 1995-12-05 1996-12-05 Dispositif d'aeration

Country Status (1)

Country Link
WO (1) WO1997022562A1 (fr)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0997183A1 (fr) * 1998-10-28 2000-05-03 Strate Technologie für Abwasser GmbH Procédé et dispositif pour l'introduction de gaz dans des liquides
GB2366526A (en) * 2000-09-06 2002-03-13 Tsai Tsung Hsin Pond aerator or oxygenator with entrainment of air using water pressure
WO2002083579A2 (fr) * 2001-04-11 2002-10-24 Jochen Stog Procede et dispositif servant a decharger des masses d'eau principalement des boues qui recouvrent leurs fonds de maniere excessive
CN1300016C (zh) * 2003-11-19 2007-02-14 黄建军 一种河流湖泊的水净化方法及其专用造流曝气设备
CN102010079A (zh) * 2010-10-28 2011-04-13 宁波大学 一种潜泳式射流增氧机
US20130020728A1 (en) * 2010-03-17 2013-01-24 Invent Umwelt-Und Verfahrenstechnik Ag Vertical agitator for wastewater received in a sedimentation tank
JP2013240748A (ja) * 2012-05-21 2013-12-05 Sorueesu:Kk 散気装置
JP2017035676A (ja) * 2015-08-12 2017-02-16 株式会社川本製作所 微細気泡発生装置及び微細気泡発生システム

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2000687A (en) * 1977-06-28 1979-01-17 Voest Ag Apparatuses for introducing gases into liquids
US4226719A (en) * 1978-07-10 1980-10-07 Woltman Robert B Treating device for large bodies of water
DD258216A1 (de) * 1987-03-06 1988-07-13 Wtz Getriebe & Kupplungen Veb Verfahren zur tiefwasser-unterdruck-belueftung
DE3724692A1 (de) * 1987-07-25 1989-02-02 Fred Dipl Ing Petersen Verfahren zum einbringen von sauerstoff in wasser und vorrichtung zur durchfuehrung des verfahrens
US4911836A (en) * 1988-08-08 1990-03-27 Haggerty T G Submerged aeration system
EP0389230A2 (fr) * 1989-03-21 1990-09-26 The BOC Group plc Dissolution de gaz
US5073309A (en) * 1987-11-03 1991-12-17 Elf France Device for dispersion of gas in a liquid phase
US5167878A (en) * 1991-08-20 1992-12-01 Aeras Water Systems, Inc. Submersible aeration device
US5314619A (en) * 1993-03-22 1994-05-24 Eco-Soil Systems, Inc. Method and apparatus for pond water clarification and maintenance
DE4312971A1 (de) * 1993-04-21 1994-10-27 Envicon Klaertech Verwalt Verfahren und Vorrichtung zur Belüftung von Gewässern

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2000687A (en) * 1977-06-28 1979-01-17 Voest Ag Apparatuses for introducing gases into liquids
US4226719A (en) * 1978-07-10 1980-10-07 Woltman Robert B Treating device for large bodies of water
DD258216A1 (de) * 1987-03-06 1988-07-13 Wtz Getriebe & Kupplungen Veb Verfahren zur tiefwasser-unterdruck-belueftung
DE3724692A1 (de) * 1987-07-25 1989-02-02 Fred Dipl Ing Petersen Verfahren zum einbringen von sauerstoff in wasser und vorrichtung zur durchfuehrung des verfahrens
US5073309A (en) * 1987-11-03 1991-12-17 Elf France Device for dispersion of gas in a liquid phase
US4911836A (en) * 1988-08-08 1990-03-27 Haggerty T G Submerged aeration system
EP0389230A2 (fr) * 1989-03-21 1990-09-26 The BOC Group plc Dissolution de gaz
US5167878A (en) * 1991-08-20 1992-12-01 Aeras Water Systems, Inc. Submersible aeration device
US5314619A (en) * 1993-03-22 1994-05-24 Eco-Soil Systems, Inc. Method and apparatus for pond water clarification and maintenance
DE4312971A1 (de) * 1993-04-21 1994-10-27 Envicon Klaertech Verwalt Verfahren und Vorrichtung zur Belüftung von Gewässern

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0997183A1 (fr) * 1998-10-28 2000-05-03 Strate Technologie für Abwasser GmbH Procédé et dispositif pour l'introduction de gaz dans des liquides
GB2366526A (en) * 2000-09-06 2002-03-13 Tsai Tsung Hsin Pond aerator or oxygenator with entrainment of air using water pressure
WO2002083579A2 (fr) * 2001-04-11 2002-10-24 Jochen Stog Procede et dispositif servant a decharger des masses d'eau principalement des boues qui recouvrent leurs fonds de maniere excessive
WO2002083579A3 (fr) * 2001-04-11 2003-02-06 Jochen Stog Procede et dispositif servant a decharger des masses d'eau principalement des boues qui recouvrent leurs fonds de maniere excessive
CN1300016C (zh) * 2003-11-19 2007-02-14 黄建军 一种河流湖泊的水净化方法及其专用造流曝气设备
US20130020728A1 (en) * 2010-03-17 2013-01-24 Invent Umwelt-Und Verfahrenstechnik Ag Vertical agitator for wastewater received in a sedimentation tank
US8944421B2 (en) * 2010-03-17 2015-02-03 Invent Umwelt-Und Verfahrenstechnik Ag Device for aerating a suspension held in a treatment tank
CN102010079A (zh) * 2010-10-28 2011-04-13 宁波大学 一种潜泳式射流增氧机
CN102010079B (zh) * 2010-10-28 2012-06-06 宁波大学 一种潜泳式射流增氧机
JP2013240748A (ja) * 2012-05-21 2013-12-05 Sorueesu:Kk 散気装置
JP2017035676A (ja) * 2015-08-12 2017-02-16 株式会社川本製作所 微細気泡発生装置及び微細気泡発生システム

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