DE2852543A1 - Gasification of fluids esp. oxygenation of activating tank - by injecting air-sewage mixture into propeller pump suction - Google Patents

Gasification of fluids esp. oxygenation of activating tank - by injecting air-sewage mixture into propeller pump suction

Info

Publication number
DE2852543A1
DE2852543A1 DE19782852543 DE2852543A DE2852543A1 DE 2852543 A1 DE2852543 A1 DE 2852543A1 DE 19782852543 DE19782852543 DE 19782852543 DE 2852543 A DE2852543 A DE 2852543A DE 2852543 A1 DE2852543 A1 DE 2852543A1
Authority
DE
Germany
Prior art keywords
oxygen
ejector
propeller pump
propeller
pump
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.)
Withdrawn
Application number
DE19782852543
Other languages
German (de)
Inventor
Norbert Sameider
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.)
Menzel & Co GmbH
Original Assignee
Menzel & Co 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 Menzel & Co GmbH filed Critical Menzel & Co GmbH
Priority to DE19782852543 priority Critical patent/DE2852543A1/en
Publication of DE2852543A1 publication Critical patent/DE2852543A1/en
Withdrawn legal-status Critical Current

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
    • C02F3/1236—Particular type of activated sludge installations
    • C02F3/1257—Oxidation ditches
    • 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
    • B01F23/2336—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
    • 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
    • B01F23/40—Mixing liquids with liquids; Emulsifying
    • B01F23/45—Mixing liquids with liquids; Emulsifying using flow mixing
    • B01F23/454—Mixing liquids with liquids; Emulsifying using flow mixing by injecting a mixture of liquid and gas
    • 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
    • B01F25/3121—Injector mixers in conduits or tubes through which the main component flows with Venturi elements; Details thereof with additional mixing means other than injector mixers, e.g. screens, baffles or rotating elements
    • 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
    • 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
    • B01F27/25—Mixers with both stirrer and drive unit submerged in the material being mixed
    • 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
    • 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
    • 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
    • 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
    • B01F27/05—Stirrers
    • B01F27/11—Stirrers characterised by the configuration of the stirrers
    • B01F27/113—Propeller-shaped stirrers for producing an axial flow, e.g. shaped like a ship or aircraft propeller
    • 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

Abstract

The fluid-gas-mixt. projection by an injector nozzle is guided to the suction section of a large propeller pump, in a process for delivering atmospheric oxygne, oxygen-enriched air or pure oxygen into fluids, and esp. into the activating tanks of clarifying plants with a predominantly horizontal flow. Used for the operation of sewage purifying plants in which the delivery of oxygen and the rotation of the contents of the tank are separates from each other. The arrangement ensures that the delivery from the injector is fed into the suction zone of the propeller pump(s), so that the water with an excessive amt. of oxygen is brought immediately into intimate contact with the water which is deficient in oxygen. This method achieves an efficiency of utilisation of the oxygen equal almost to 100%. The size of the injector nozzles is chosen so that stoppage by fibrous matter, etc. is not possible.

Description

Verfahren zur Begasung von Flüssigkeiten, insbesondereProcess for gassing liquids, in particular

zum Sauerstoffeintrag im Belebungsbecken und Vorrichtung zur Durchführung des Verfahrens Gegenstand- der Erfindwi.#' ist ein Verfahren für den Betrieb von Belebungsbecken in Kläranlagen, bei denen die Begasung zwecks Eintragung von Sauerstoff und die Umwälzung des Beckeninhaltes voneinander getrennt sind.for the introduction of oxygen in the aeration tank and device for implementation of the procedure Subject matter of the invention is a method for the operation of aeration tanks in sewage treatment plants, where fumigation for the purpose of entry of oxygen and the circulation of the pool contents are separated from each other.

Die Umwälzung erfolgt dabei mit großformatigen Pro -peilerpumpen, während der Sauerstoff mittels Ejektoren eingetragen ls ird .The circulation takes place with large-format propeller pumps, while the oxygen is introduced by means of ejectors.

Es sind bereits Sauerstoffeintragsverfahren bekannt -geworden, bei denen ebenfalls Propeller und Ejektoren Verwendung finden. Bei diesen Verfahren haben die Ejektoren jedoch neben dem Sauerstoffeintrag im wesentlichen die Aufgabe, eine horizontale Strömung herbeizuführen, die bei Bedarf durch Rohrpropeller verstärkt wird.Oxygen introduction processes have already become known at which also use propellers and ejectors. In these procedures However, in addition to introducing oxygen, the ejectors essentially have the task of to bring about a horizontal flow which, if necessary, is reinforced by a tubular propeller will.

Bekanntlich sind Ejektoren in der Lage, eine Flü-ssigkeit und ein Gas besonders gut zu vermischen, so daß ein Optimum an gemeinsamen Grenzflächen der beiden Phasen entsteht. Bezogen auf den Sauerstoffeintrag in Abwasser bedeutet dies grundsä#tzlich, daß bei dem den Ejektor verlassenden Gas - Wassergemisch der Sauerstoff im Überschuß vorliegt.As is well known, ejectors are able to produce a liquid and a To mix gas particularly well, so that an optimum of common interfaces of the two phases. In relation to the oxygen input in wastewater means This basically means that with the gas / water mixture leaving the ejector the Oxygen is present in excess.

Die Wirtschaftlichkeit einer Ejektorbeliiftung für Abwasser hängt nun davon ab, wieweit es gelingt, das den Ejektor verlassende und mit Sauerstoff iibersättigte Gemisch mit sauer sto ffarmein Wasser zu vermischen be -vor der überschüssige Sauerstoff, bedingt durch das Ausgasen nach der Entspannung, das Wasser verläßt.The profitability of an ejector lift for wastewater depends now depends on the extent to which it succeeds in leaving the ejector and with oxygen Mix the oversaturated mixture with oxygen-poor water before the excess Oxygen, caused by the outgassing after relaxation, leaves the water.

Bei der hier beschriebenen Erfindung wird daher der Ausstoß des bzç. der Ejektoren in den Ansaugbereich der Propellerpumpe (n) geführt, so daß zwangsweise sofort das Wasser mit überschüssigem Sauerstoff mit Wasser mit defizitärem Sauerstoff gemischt wird.In the invention described here, therefore, the output of the bzç. of the ejectors into the suction area of the propeller pump (s), so that forcibly immediately the water with excess oxygen with water with deficient oxygen is mixed.

Versuche haben gezeigt, daß mit einer solchen Anordnung Sauersto ffausnut zungsrverte bis nahe an i iOO O/o erzielt werden können.Experiments have shown that oxygen ffausnut with such an arrangement Incremental sales of up to almost 100% can be achieved.

Weitere Vorteile ergeben sich bei der beschriebenen Erfindung dadurch, daß relativ große Ejektoren Ver -wendung finden können, deren Düsenquerschnitte fiir den Treibstrahl so bemessen sind, daß die Gefahr von Verstopfungen,#bedingt durch Abwasserinhaltsstoffe, z.B. Fasern, äußerst gering sind. An Hand der Zeichnungen soll die Erfindung an einem Ausführungsbei -spiel näher erläutert werden.Further advantages result from the described invention in that that relatively large ejectors can be used, their nozzle cross-sections for the propulsion jet are dimensioned in such a way that the risk of blockages, # conditional are extremely low due to substances contained in wastewater, e.g. fibers. Using the drawings the invention is to be explained in more detail using an exemplary embodiment.

Es zeigen: Fig. 1 eine perspektivische schematische Darstellung der erfindungsgemäßen Vorrichtung aus Pumpe, Ejektor und Propellerpumpe, Fig. 2 eine schematische Schnittansicht der in ein Belebungsbecken eingesetzten Vorrichtung nach Fig. 1, Fig. 3 eine Draufsicht auf die Anordnung gemäß Fig. 2 in Schnittdarstellung, und Fig. 4 eine Draufsicht auf ein Beblebungsbecken mit mehrfach umgelenkter, horizontaler Abwasserstromllng, in das zwei Vorrichtungen gemäß Fig. 1 eingesetzt sind, in schematischer Dar-Stellung. The figures show: FIG. 1 a perspective schematic illustration of FIG Device according to the invention comprising a pump, ejector and propeller pump, FIG. 2 a schematic sectional view of the device used in an aeration tank according to Fig. 1, Fig. 3 is a plan view of the arrangement according to Fig. 2 in a sectional view, and FIG. 4 shows a plan view of an activation tank with a horizontal one deflected several times Abwasserstromllng, in which two devices according to FIG. 1 are used, in a schematic Depiction.

Eine Abwasserpumpe (2) saugt aus dem Belebungsbecken (l) ein Belebtschlamm-Wasser-Gemisch an und fördert es als Treibstrahl durch die Treibdüse (5) des Ejek tors (3). Durch die bekannten physikalischen Gesetze entsteht im Kopf des Ejektors ein Unterdruck, so daß sauerstoffhaltiges Gas über den Saugstutzen (7) angesaugt wird. Im Diffusor (6) kommt es zur innigen Durchmischung zwischen Flüssigkeits - und Gasphase. Das Gemisch verläßt den Diffusor (6) mit mehrfacher Sauer -stoffübersättigung. A waste water pump (2) sucks an activated sludge-water mixture from the activated sludge tank (1) and promotes it as a propulsion jet through the propulsion nozzle (5) of the ejector (3). By the well-known physical laws, a negative pressure is created in the head of the ejector, so that oxygen-containing gas is sucked in via the suction nozzle (7). In the diffuser (6) there is an intimate mixing between the liquid and gas phases. That Mixture leaves the diffuser (6) with multiple oxygen supersaturation.

Um diese Sauerstoffübersättigung zu nutzen, erfolgt jetzt eine weitere Durchmischung mit sauerstoffarmem Wasser. Gemäß# Zeichnung lçird das sauerstoffreiche Gemisch in den Ansaugbereich einer großformatigen Propellerpumpe (4) geführt1 deren Förderleistung viel -fach so groß ist, wie die der Treibwasserpumpe (2).In order to use this oxygen oversaturation, another one is now being carried out Mixing with low-oxygen water. According to the drawing, the oxygen-rich Mixture fed into the suction area of a large-format propeller pump (4) Delivery rate is many times as large as that of the motive water pump (2).

Die Form der für die Erfindung anzuwendenden Bele -bungsbecken ist dabei beliebig, optimal sind jedoch Becken, die eine geschlossene, horizontale Strömung der darin befindlichen Flüssigkeit ermöglichen.The form of the aeration tanks to be used for the invention is Any, but optimal are basins that have a closed, horizontal flow allow the liquid contained therein.

L e e r s e i t eL e r s e i t e

Claims (12)

Patentansprüche Verfahren zum Eintragen von Luftsauerstoff, mit Sauerstoff angereicherter Luft, bzls. reinem Sauerstoff in Flüssigkeiten, insbesondere in Belebungsbecken (1) von Kläranlagen mit überwiegend horizontaler Strömung, dadurch gekennzeichnet, daß der Ausstoß des Flüssigkeits - Gas - Gemisches von zumindest einem Ejektor (3) in den Ansaugbereich zumindest einer großformatigen Propellerpumpe (/1) geführt wird. Method for introducing atmospheric oxygen with oxygen enriched air, or pure oxygen in liquids, especially in aeration tanks (1) of sewage treatment plants with predominantly horizontal flow, characterized in that that the discharge of the liquid-gas mixture from at least one ejector (3) led into the suction area of at least one large-format propeller pump (/ 1) will. 2. Verfahren nach Anspruch 1 dadurch gekennzeichnet, daß das angesaugte Gas unter atmosphärischem Druck steht. 2. The method according to claim 1, characterized in that the sucked Gas is under atmospheric pressure. 3. Verfahren nach Anspruch 1 dadurch gekennzeichnet, daß das angesaugte Gas durch einen Kom -pressor (8) vorgeladen wird. 3. The method according to claim 1, characterized in that the sucked Gas is precharged by a compressor (8). 4. Verfahren nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß die Treibwasserpumpe (2) des Ejektors entsprechend des Sauerstoffgehaltes im Belebungsbecken (1) intermittierend betrieben wird. 4. The method according to any one of claims 1 to 3, characterized in that that the motive water pump (2) of the ejector according to the oxygen content in the Aeration basin (1) is operated intermittently. 5. Verfahren nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß die Treibwasserpumpe (2) des Ejektors und der Ladekompressor (8) intermittierend betrieben werden. 5. The method according to any one of claims 1 to 3, characterized in, that the motive water pump (2) of the ejector and the charge compressor (8) intermittently operate. 6. Verfahren nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, daß die Treibwasserplamne (2) des Ejektors mit Abwasser gespeist wird. 6. The method according to any one of claims 1 to 5, characterized in that that the driving water plans (2) of the ejector is fed with waste water. 7. Verfahren nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, daß die Treibwasserpumpe (2) des Ejektors mit Rücklaufschlamm aus dem Nachklärbecken gespeist wird. 7. The method according to any one of claims 1 to 5, characterized in that that the motive water pump (2) of the ejector with return sludge from the secondary clarifier is fed. 8. Verfahren nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, daß die Treibwasserpumpe (2) des Ejektors mit einem Gemisch aus Rücklaufschlamm und Rohabwasser gespeist wird. 8. The method according to any one of claims 1 to 5, characterized in, that the motive water pump (2) of the ejector with a mixture of return sludge and raw sewage is fed. 9. Vorrichtung zur Durchführung des Verfahrens nach einem der Ansprüche 1 bis 8, dadurch gekennzeichnet, daß die Ausstoßleitung des mindestens einen Ejektors (3) in dem Ansaugbereich der Propellerpumpe (4) mündet. 9. Device for performing the method according to one of the claims 1 to 8, characterized in that the discharge line of the at least one ejector (3) opens into the suction area of the propeller pump (4). 10. Vorrichtung nach Anspruch 9, dadurch gekennzeichnet, daß Pumpen (2) und Ejektor (3) in Naßaufstellung direkt im Bereich der Propeller (4) installiert sind.10. Apparatus according to claim 9, characterized in that pumps (2) and ejector (3) installed in a wet installation directly in the area of the propeller (4) are. 11. Vorrichtung nach Anspruch 9, dadurch gekennzeichnet, daß die Pumpen (2) in Trockenaufstellung außerhalb des Belebungsbeckens (1) installiert sind.11. The device according to claim 9, characterized in that the pumps (2) are installed in a dry installation outside the activated sludge tank (1). 12. Vorrichtung nach Anspruch 9, dadurch gekennzeichnet, daß Pumpen (2) und die Ejektoren (-3) in Trockenaufstellung außerhalb des Belebungsbeckens (lY installiert sind und lediglich eine Druckleitung für das Gemisch als Ausstoßleitung in den Ansaugbereich der Propellerpumpe (4) führt.12. The device according to claim 9, characterized in that pumps (2) and the ejectors (-3) in a dry installation outside the activated sludge tank (lY are installed and only a pressure line for the mixture as an exhaust line leads into the suction area of the propeller pump (4).
DE19782852543 1978-12-05 1978-12-05 Gasification of fluids esp. oxygenation of activating tank - by injecting air-sewage mixture into propeller pump suction Withdrawn DE2852543A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE19782852543 DE2852543A1 (en) 1978-12-05 1978-12-05 Gasification of fluids esp. oxygenation of activating tank - by injecting air-sewage mixture into propeller pump suction

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19782852543 DE2852543A1 (en) 1978-12-05 1978-12-05 Gasification of fluids esp. oxygenation of activating tank - by injecting air-sewage mixture into propeller pump suction

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DE2852543A1 true DE2852543A1 (en) 1980-06-12

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DE19782852543 Withdrawn DE2852543A1 (en) 1978-12-05 1978-12-05 Gasification of fluids esp. oxygenation of activating tank - by injecting air-sewage mixture into propeller pump suction

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0069354A1 (en) * 1981-07-04 1983-01-12 Menzel GmbH. + Co. Method and apparatus for liquid treatment
WO1983003597A1 (en) * 1982-04-07 1983-10-27 Zink, Jürgen Method for material exchange in a liquid
DE3340296A1 (en) * 1983-11-08 1985-05-15 Albert 5204 Lohmar Blum DEVICE FOR STIRING, VENTILATING AND PUMPING OFF LIQUIDS
EP0845290A1 (en) * 1996-11-29 1998-06-03 ITT Flygt Aktiebolag Aeration and mixing unit

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0069354A1 (en) * 1981-07-04 1983-01-12 Menzel GmbH. + Co. Method and apparatus for liquid treatment
WO1983000097A1 (en) * 1981-07-04 1983-01-20 Schneider, Norbert Method and device for the treatment of a liquid
WO1983003597A1 (en) * 1982-04-07 1983-10-27 Zink, Jürgen Method for material exchange in a liquid
DE3340296A1 (en) * 1983-11-08 1985-05-15 Albert 5204 Lohmar Blum DEVICE FOR STIRING, VENTILATING AND PUMPING OFF LIQUIDS
EP0845290A1 (en) * 1996-11-29 1998-06-03 ITT Flygt Aktiebolag Aeration and mixing unit
AU716384B2 (en) * 1996-11-29 2000-02-24 Itt Flygt Ab A mixing and aeration unit

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