DE2147080A1 - Submerged aerator - for activated sludge sewage treatment plant with external compressed air supply - Google Patents

Submerged aerator - for activated sludge sewage treatment plant with external compressed air supply

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Publication number
DE2147080A1
DE2147080A1 DE2147080A DE2147080A DE2147080A1 DE 2147080 A1 DE2147080 A1 DE 2147080A1 DE 2147080 A DE2147080 A DE 2147080A DE 2147080 A DE2147080 A DE 2147080A DE 2147080 A1 DE2147080 A1 DE 2147080A1
Authority
DE
Germany
Prior art keywords
propeller
compressed air
aeration
treatment plant
air supply
Prior art date
Legal status (The legal status 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 status listed.)
Pending
Application number
DE2147080A
Other languages
German (de)
Inventor
Klaus-Juergen Fischer
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Abwasser Reinigungs Oms S GmbH
Original Assignee
Abwasser Reinigungs Oms S GmbH
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
Application filed by Abwasser Reinigungs Oms S GmbH filed Critical Abwasser Reinigungs Oms S GmbH
Priority to DE2147080A priority Critical patent/DE2147080A1/en
Publication of DE2147080A1 publication Critical patent/DE2147080A1/en
Pending legal-status Critical Current

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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
    • C02F3/14—Activated sludge processes using surface aeration
    • C02F3/18—Activated sludge processes using surface aeration the aerator having a horizontal axis
    • 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
    • B01F23/233—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids using driven stirrers with completely immersed stirring elements
    • B01F23/2332—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids using driven stirrers with completely immersed stirring elements the stirrer rotating about a horizontal axis; Stirrers therefor
    • 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
    • B01F23/233—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids using driven stirrers with completely immersed stirring elements
    • B01F23/2334—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids using driven stirrers with completely immersed stirring elements provided with stationary guiding means surrounding at least partially the stirrer
    • B01F23/23341—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids using driven stirrers with completely immersed stirring elements provided with stationary guiding means surrounding at least partially the stirrer with tubes surrounding the stirrer
    • 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
    • B01F23/233—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids using driven stirrers with completely immersed stirring elements
    • B01F23/2335—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids using driven stirrers with completely immersed stirring elements characterised by the direction of introduction of the gas relative to the stirrer
    • B01F23/23351—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids using driven stirrers with completely immersed stirring elements characterised by the direction of introduction of the gas relative to the stirrer the gas moving along the axis of rotation
    • 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
    • B01F23/233—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids using driven stirrers with completely immersed stirring elements
    • B01F23/2335—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids using driven stirrers with completely immersed stirring elements characterised by the direction of introduction of the gas relative to the stirrer
    • B01F23/23353—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids using driven stirrers with completely immersed stirring elements characterised by the direction of introduction of the gas relative to the stirrer the gas being sucked towards the rotating stirrer
    • 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
    • B01F23/233—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids using driven stirrers with completely immersed stirring elements
    • B01F23/2336—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids using driven stirrers with completely immersed stirring elements characterised by the location of the place of introduction of the gas relative to the stirrer
    • B01F23/23367—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids using driven stirrers with completely immersed stirring elements characterised by the location of the place of introduction of the gas relative to the stirrer the gas being introduced behind the stirrer
    • 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
    • C02F3/20—Activated sludge processes using diffusers
    • 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
    • C02F3/20—Activated sludge processes using diffusers
    • C02F3/205—Moving, e.g. rotary, diffusers; Stationary diffusers with moving, e.g. rotary, distributors
    • C02F3/207—Moving, e.g. rotary, diffusers; Stationary diffusers with moving, e.g. rotary, distributors with axial thrust propellers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F27/00—Mixers with rotary stirring devices in fixed receptacles; Kneaders
    • B01F27/60—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a horizontal or inclined axis
    • 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

Landscapes

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

Abstract

A multi-blade propeller is mounted on a horizontal hub and shaft near the base of the aeration tank of the plant and the compressed air supply pipe is terminated just behind the propeller, i.e. on its suction side near to the hub. The propeller is driven by a belt/chain etc. from a motor mounted above the tank. It is surrounded by a short length of guide tube, whose axis is also horizontal, and whose end on the delivery side of the propeller is gently flared outwards. Increased oxygen usage is obtd.

Description

Vorrichtung zur Belüftung von abwasser im Belüftungsbecken einer Abwas serreinigungsanlage Die Erfindung betrifft eine Vorrichtung zur Belüftung von Abwasser im Belüftungsbecken einer nach dem Belebtschlaverfahren arbeitenden Abwasserreinigungsanlage. Device for aeration of wastewater in the aeration basin Wastewater cleaning system The invention relates to a device for ventilation of wastewater in the aeration basin of a working according to the activated slaughter process Sewage treatment plant.

Bei derartigen Abwasserreinigungsanlagen ist es bekannt, die für die biologische Abwasserreinigung erforderliche Luft durch Oberflächenbelüfter, z. B. in der Form von Kreiseln zuzuführen.In such wastewater treatment plants, it is known that for the biological wastewater treatment required air through surface aerators, e.g. B. in the form of gyroscopes.

Außerdem ist es bekannt und üblich, zur Belüftung Druckluft durch Tauchrohre in das Belüftungbecken einzuführen, die im Regelfall am Boden des Belüftungsbeckens angeordnet sind und eine Vielzahl von DurchtrittsLöchern für die Luft aufweisen, um einen längeren Kontakt zwischen der Luft und dem Abwasser rnid außerdom eine Umwälzung des Abwassers iii dem Belüftungsbecken zu bekommen. Bei einer derartigen Druckiuftbelüftung unterscheidet man drei Arten, nämllch die grobbiasige, mittetblaslge und feinblasige Helüftung, die bel den bekannten Tauchrohr in Abhängigkeit von der Größe der Durchtrittsdffnungen erhalten werden. Die beste Sauerstoffausnutsung erhält man bei der feinblasigen Belüftung. Die Sauerstcffausnutzung ist um so größer, Je liner die sich bildenden Luftblasen Kontakt mit den Belebtschlamm und den darin enthaltenen Mikroorganismen haben. In der Praxis wurden bisher bei günstigen Bedingungen Werte as 12% Sauerstoffausnutzung erreicht.It is also known and customary to use compressed air for ventilation Insert immersion pipes into the aeration basin, which are usually at the bottom of the aeration basin are arranged and have a plurality of passage holes for the air, a longer contact between the air and the sewage rnid outside the area Recirculation of sewage iii to get the aeration basin. With such a There are three types of compressed air ventilation, namely the coarse-biased, central-blown and fine-bubble ventilation, which is known from the well-known Immersion tube as a function can be obtained from the size of the passage openings. The best oxygen utilization is obtained from the fine-bubble ventilation. The oxygen utilization is all the greater, The liner the air bubbles that form come into contact with the activated sludge and the sludge in it contained microorganisms. In practice, the conditions so far have been favorable Values as 12% oxygen utilization achieved.

Aufgab. der Erfindung war es nunmehr, die Sauerstoffausnutzung gegenüber dem Stand der Technik weiter zu erhöhen.Gave up. the invention was now opposed to the use of oxygen to further increase the state of the art.

Hierzu dient erfindungsgemäß eine Vorrichtung zur Belüftung von Abwasser in Belüftungsbecken einer nach dem Belebtschlammverfahren arbeitenden Abwasserreinigungsanlage mit einer in das Belüftungsbecken eingeführten Druckluftleitung, wobei die Vorrichtung dadurch gekennzeichnet ist, daß sie einen von einem Motor angetriebenen Propeller aufweist und die Druckluftleitung im wesentlichen unmittelbar hinter den Propeller in denn Bslüftungsbecken mündet.According to the invention, a device for aeration of wastewater is used for this purpose in aeration basins of a wastewater treatment plant working according to the activated sludge process with a compressed air line introduced into the aeration basin, the device characterized in that it is a propeller driven by a motor and the compressed air line essentially immediately behind the propeller then flows into the ventilation basin.

Der sich schnell drehende Propeller bewirkt einerseits, daß die durch ihn hindurch tretende Luft in feine Blasen zerschlagen wird, wodurch die Kontaktfläche zwischen dem Belebtschlamm und den Luftblasen ver6rößcrt wird. Andererseits übt der sich drehende Propeller auf die hinter ihm abgegebene Luft einen @@ aus, @@ daß sie durch die Propellerblätter hindurch gesaugt wird. Befindet sich die Luft dann vor dem Propeller so wird auf die feinen Luftblasen zusätzlich eine Schubwirkung ausgeübt, daß die Luftblasen nicht gleich hinter dem Propeller in @@@ Absaaser aufsteigen. @ondern ihr Weg eine horizontale Komponente erteilt bekommt, die den Weg der Luftblasen und damit die Kontaktzeit weiter erhöht. Auf diese Weise kann man mit der erfindungsgemäßen Vorrichtung eine große Sauerstoffausnutzung erreichen, die praktisch wenigstens doppelt so hoch liegt wie bei herkömmlichen Belüftungsvorrich tungen.The rapidly rotating propeller causes on the one hand that the through Air passing through it is crushed into fine bubbles, causing the contact surface between the activated sludge and the air bubbles is enlarged. On the other hand, practice the spinning propeller @@ on the air released behind it, @@ that it is sucked through the propeller blades. There is air then in front of the propeller there is an additional thrust effect on the fine air bubbles exercised that the air bubbles do not rise immediately behind the propeller in @@@ Absaaser. @but their way a horizontal one Component gets granted that the path of the air bubbles and thus the contact time further increased. In this way one can achieve a high oxygen utilization with the device according to the invention, which is practically at least twice as high as with conventional ventilation devices services.

Ein weiterer Vorteil der erfindungsgemäßen Vorrichtung besteht darin, daß eine Trennung zwischen Belüftung und Umwälzung erfolgen kann, und daher optimale energiewirtschaftliche Anpassung an die jeweiligen Betriebsverhältnisse erfolgt.Another advantage of the device according to the invention is that that a separation between ventilation and circulation can take place, and therefore optimal energy industry adjustment to the respective operating conditions.

Der Propeller kann in dem Belüftungebecken so angeordnet sein, daß die Propellernabe horizontal oder geneigt angeordnet ist.The propeller can be arranged in the ventilation basin so that the propeller hub is arranged horizontally or at an incline.

Um den Weg der Luftblasen möglichst groß zu halten, ist dabei selbstverständlich eine horizontale Anordnung der Propellernabe bevorzugt.In order to keep the path of the air bubbles as large as possible, it goes without saying a horizontal arrangement of the propeller hub is preferred.

Besonders zweckmäßig ist es, daß die Druckluftleitung derart angeordnet ist, dat sie im Bereich der Propellernabe mündet.It is particularly useful that the compressed air line is arranged in this way is, dat it opens in the area of the propeller hub.

Bei einer solchen Anordnung wird die aus der Druckluftleitung austretende Luft am wirksamsten in feine Bläschen zerschlagen.With such an arrangement, the one emerging from the compressed air line is The most effective way of breaking air into fine bubbles.

Die Fließbewegung in dem Belüftungebeoken kann durch bewegliche Leitwände an der Saugseite des als Pumpe wirkenden Propellers den erforderlichen Verhältnissen genau angepaßt werden.The flow movement in the ventilation beoken can be achieved by movable baffles the required conditions on the suction side of the propeller acting as a pump be adjusted exactly.

Ein den Propeller umgebendes Rohrstück, dessen Längsachse im wesentlichen in der gleichen Richtung wie die Propellernabe vräuft, sorgt noch filr eine intensivere Mischung des Belebtschlammes mit den Luftbläschen und für eine Breitenströmung.A piece of pipe surrounding the propeller, the longitudinal axis of which is essentially runs in the same direction as the propeller hub, making for an even more intense one Mixture of activated sludge with the air bubbles and for one Broad currents.

Vorteilhafterweise ist dieses Rohrstück so ausgebildet, daß es sich auf der Druckseite des Propellers von dem Propeller aus konisch erweitert. Propeller und umgebendes Rohrstück sind zweckmäßigerweise im Bereich des Bodens des BelUftungsbalkens angeordnet.Advantageously, this piece of pipe is designed so that it on the pressure side of the propeller flared from the propeller. propeller and the surrounding pipe section are expediently in the area of the bottom of the ventilation bar arranged.

Die erfindungsgemäße Belüftungsvorrichtung eignet sich insbesondere zur Belüftung runder, ovaler oder ringförmiger, gegebenenfalls auch langgestreckter rechteckiger Belüftungebecken, während bei anders geformten Belüftungsbecken eindemgegenüber geringerer Effekt erzielt werden kann. In allen Fällen ist aber davon auszugehen, daß die erfindungsgemäße Vorrichtung eine wesentlich höhere Sauerstoffausnutzung als bekannte Belüftungsvorrichtung en liefert und dadurch der Energiebedarf sehr verringert wird.The ventilation device according to the invention is particularly suitable for ventilation of round, oval or ring-shaped, possibly also elongated rectangular aeration basin, while in the case of differently shaped aeration basins one opposite less effect can be achieved. In all cases, however, it can be assumed that the device according to the invention has a much higher oxygen utilization as a known ventilation device and therefore the energy requirement very much is decreased.

Die Zeichnung dient der weiteren Erläuterung der Erfindung.The drawing serves to further explain the invention.

In dieser ist eine Ausführungsform der Belüftungsvorrichtung nach der Erfindung dargestellt, wobei von dem Belüftungsbekken lediglich ein Teil des Beckenbodens gezeigt ist.In this one embodiment of the ventilation device is according to of the invention shown, with only a part of the ventilation basin Pelvic floor is shown.

Auf dem Beckenboden 1 des Belüftungsbeckens ist ein Rohrstück 2 befestigt, das einen Propeller 3 umgibt und sich an der Druckseite des Propellers zum freien Ende 4 hin konisch erweitert. Der Propeller 3 ist von einem Motor 5 über eilze Kette 6 angetrieben und befindet sich im Betrieb in schneller Drehbewegung. Der Motor 5 ist auf einer schematisch dargestellten Konsole 7 befestigt.A piece of pipe 2 is attached to the basin floor 1 of the aeration basin, which surrounds a propeller 3 and is on the pressure side of the propeller to the free End of 4 widened conically. The propeller 3 is driven by a motor 5 via a chain 6 and is in rapid rotation during operation. The motor 5 is attached to a console 7, shown schematically.

Die Druckluftleitung 8 erstreckt sich von oben durch die Konsole 7 in das Belüftungsbecken und mündet kurz hinter dem Propeller 3 im Bereich der Propellernabe 9.The compressed air line 8 extends from above through the console 7 into the aeration basin and opens shortly behind the propeller 3 in the area of the propeller hub 9.

Beim Betrieb dieser Vorrichtung wird der Inhalt des Belüftungsbeckens infolge der Pumpwirkung des Propellers 3 durch das Rohrstück 2 hindurch gepumpt und dabei gleichzeitig mit der aus der Druckluftleitung 8 austretenden Luft vermischt.When operating this device, the contents of the aeration basin pumped through the pipe section 2 due to the pumping action of the propeller 3 and at the same time mixed with the air emerging from the compressed air line 8.

Diese wird infolge der Saugwirkung des Propellers 3 durch die Propellerblätter hindurch gesaugt und dabei in feine Blasen zerschlagen. Diese beschreiben in dem Belilftungsbekken infolge der Pumpwirkung des Propellers und infolge der Ablenkung durch das Rohrstück 2 eine kurvenförmige Bahn und steigen nicht gleich hinter dem Propeller senkrecht nach oben.This is due to the suction of the propeller 3 by the propeller blades sucked through and smashed into fine bubbles. These describe in the Ventilation basin as a result of the pumping action of the propeller and as a result of the deflection through the pipe section 2 a curved path and do not rise immediately behind the Propeller straight up.

Innerhalb des Erfindungsgedankens können selbstverständlich zahlreiche Abwandlungen vorgenommen werden soweit die Vorrichtung die erfindvmgswesentlichen Merkmale umfaßt. Beispielsweise kann der Motor unmittelbar hinter der Propellernabe in dem Belüftungsbecken in einem korrosionsfesten Gehäuse angeordnet sind, wodurch sich eine Übertragungseinrichtung* wie die Kette 6 erübrigt. Die Propellerblätter können beliebig ausgebildet sein, um in an sich bekannter Weise eLne wögllchst große Effek tivität des Propellers zn errelchen.Of course, numerous can be within the scope of the invention Modifications are made to the extent that the device is essential to the invention Features includes. For example, the engine can be located directly behind the propeller hub are arranged in the aeration basin in a corrosion-resistant housing, whereby A transmission device * like the chain 6 is unnecessary. The propeller blades can be designed in any way in order to achieve the greatest possible size in a manner known per se Determine the effectiveness of the propeller.

Claims (6)

P a t e n t a n s p r ü c h e P a t e n t a n s p r ü c h e Vorrichtungzur Belüftung von Abwasser im Belüftungsbecken einer nach dem flelebtsohlammverfahren arbeitenden Abwasserreinigungsanlage mit einer in das Belüftungsbecken eintauchenden Druckluftleitung, dadurch gekennzeichnet, daß die Vorrichtung einen von einem Motor (5) angetriebenen Propeller () aufweist, und die Druckluftleitung (8) im wesentlichen unmittelbar hinter dem Propeller in dem Belüftungsbecken mündet. Device for aeration of wastewater in the aeration basin after the waste water treatment plant working with the living solids process with a Aeration basin immersed compressed air line, characterized in that the Device has a propeller () driven by a motor (5), and the Compressed air line (8) essentially immediately behind the propeller in the aeration basin flows out. 2. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß die Propellernabe (9) im wesentlichen horizontal in dem Belüftungsbecken angeordnet ist.2. Apparatus according to claim 1, characterized in that the propeller hub (9) is arranged essentially horizontally in the aeration basin. 3. Vorrichtung nach Anspruch 1 und 2, dadurch gekennzeichnet, daß der Propeller (3) im Bereich des Belüftungsbeckenbodens (1) angeordnet ist.3. Apparatus according to claim 1 and 2, characterized in that the propeller (3) is arranged in the area of the aeration tank bottom (1). 4. Vorrichtung nach Anspruch 1 bis 3, dadurch gekennzeichnet, daß die Druckluftleitung (8) im Bereich der Propellernabe (9) mündet.4. Apparatus according to claim 1 to 3, characterized in that the compressed air line (8) opens in the area of the propeller hub (9). 5 Vorrichtung nach Anspruch 1 biß 4, dadurch gekennzeichnet, daß der Propel@r von elnem Rohrstück (2) umgeben lst, desitl sen Längsachse im wesentllchen/des gleichen Rlchtung wle die Propellernaba (9) ausgsrlch@@ lse.5 Device according to claim 1 to 4, characterized in that the Propel @ r is surrounded by a piece of pipe (2), the longitudinal axis essentially In the same direction select the propeller hub (9) from @@ lse. 6.) Vorrichtung nach Anspruch 5> dadurch gekennzeichnet, daß das Rohrstück (2) sich auf der Druckseite des Pro-pellerb (3) von dem Propeller aus zu seinem freien Ende (4) konisch erweitert.6.) Device according to claim 5> characterized in that the Pipe section (2) on the pressure side of the Pro-pellerb (3) from the propeller widened conically to its free end (4). L e e r s e i t eL e r s e i t e
DE2147080A 1971-09-21 1971-09-21 Submerged aerator - for activated sludge sewage treatment plant with external compressed air supply Pending DE2147080A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE2147080A DE2147080A1 (en) 1971-09-21 1971-09-21 Submerged aerator - for activated sludge sewage treatment plant with external compressed air supply

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2147080A DE2147080A1 (en) 1971-09-21 1971-09-21 Submerged aerator - for activated sludge sewage treatment plant with external compressed air supply

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DE2147080A1 true DE2147080A1 (en) 1973-03-29

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2823237A1 (en) * 1978-05-27 1979-11-29 Kloeckner Werke Ag PURIFICATION DEVICE
US4394268A (en) * 1977-11-04 1983-07-19 Reid John H Conversion of plug flow and complete mix aeration basins to barrier oxidation ditches
WO2011036221A1 (en) 2009-09-23 2011-03-31 Invent Umwelt- Und Verfahrenstechnik Ag Device for cleaning wastewater
DE102012204724A1 (en) 2012-03-23 2013-09-26 Invent Umwelt-Und Verfahrenstechnik Ag Arrangement and method for generating a flow in a wastewater treatment basin

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4394268A (en) * 1977-11-04 1983-07-19 Reid John H Conversion of plug flow and complete mix aeration basins to barrier oxidation ditches
DE2823237A1 (en) * 1978-05-27 1979-11-29 Kloeckner Werke Ag PURIFICATION DEVICE
WO2011036221A1 (en) 2009-09-23 2011-03-31 Invent Umwelt- Und Verfahrenstechnik Ag Device for cleaning wastewater
DE102009044918A1 (en) * 2009-09-23 2011-03-31 Invent Umwelt- Und Verfahrenstechnik Ag Arrangement for generating a circulating flow in a treatment tank for treating wastewater
DE102012204724A1 (en) 2012-03-23 2013-09-26 Invent Umwelt-Und Verfahrenstechnik Ag Arrangement and method for generating a flow in a wastewater treatment basin
WO2013139863A1 (en) 2012-03-23 2013-09-26 Invent Umwelt- Und Verfahrenstechnik Ag Arrangement and method for producing a flow in a wastewater treatment tank

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