DE1029754B - Ventilation device for fine-bubble aeration of water, especially waste water - Google Patents

Ventilation device for fine-bubble aeration of water, especially waste water

Info

Publication number
DE1029754B
DE1029754B DEP16296A DEP0016296A DE1029754B DE 1029754 B DE1029754 B DE 1029754B DE P16296 A DEP16296 A DE P16296A DE P0016296 A DEP0016296 A DE P0016296A DE 1029754 B DE1029754 B DE 1029754B
Authority
DE
Germany
Prior art keywords
ventilation
bubble
ventilation device
water
fine
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
DEP16296A
Other languages
German (de)
Inventor
Herbert Auler
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.)
Aqseptence Group GmbH
Original Assignee
Passavant Werke AG and Co KG
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 Passavant Werke AG and Co KG filed Critical Passavant Werke AG and Co KG
Priority to DEP16296A priority Critical patent/DE1029754B/en
Priority to CH350258D priority patent/CH350258A/en
Priority to FR1175082D priority patent/FR1175082A/en
Publication of DE1029754B publication Critical patent/DE1029754B/en
Pending 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
    • C02F3/20—Activated sludge processes using diffusers
    • 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
    • B01F23/231—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids by bubbling
    • B01F23/23105—Arrangement or manipulation of the gas bubbling devices
    • B01F23/2312—Diffusers
    • B01F23/23122—Diffusers having elements opening under air pressure, e.g. valves
    • 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
    • B01F23/231—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids by bubbling
    • B01F23/23105—Arrangement or manipulation of the gas bubbling devices
    • B01F23/2312—Diffusers
    • B01F23/23123—Diffusers consisting of rigid porous or perforated material
    • 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
    • B01F23/231—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids by bubbling
    • B01F23/23105—Arrangement or manipulation of the gas bubbling devices
    • B01F23/2312—Diffusers
    • B01F23/23123—Diffusers consisting of rigid porous or perforated material
    • B01F23/231231—Diffusers consisting of rigid porous or perforated material the outlets being in the form of perforations
    • 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
    • B01F23/231—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids by bubbling
    • B01F23/23105—Arrangement or manipulation of the gas bubbling devices
    • B01F23/2312—Diffusers
    • B01F23/23126—Diffusers characterised by the shape of the diffuser element
    • B01F23/231261—Diffusers characterised by the shape of the diffuser element having a box- or block-shape, being in the form of aeration stones
    • 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
    • B01F23/231—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids by bubbling
    • B01F23/23105—Arrangement or manipulation of the gas bubbling devices
    • B01F23/2312—Diffusers
    • B01F23/23126—Diffusers characterised by the shape of the diffuser element
    • B01F23/231263—Diffusers characterised by the shape of the diffuser element having dome-, cap- or inversed cone-shape
    • 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
    • B01F23/231—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids by bubbling
    • B01F23/23105—Arrangement or manipulation of the gas bubbling devices
    • B01F23/2312—Diffusers
    • B01F23/23126—Diffusers characterised by the shape of the diffuser element
    • B01F23/231264—Diffusers characterised by the shape of the diffuser element being in the form of plates, flat beams, flat membranes or films
    • 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
    • B01F23/231—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids by bubbling
    • B01F23/23105—Arrangement or manipulation of the gas bubbling devices
    • B01F23/2312—Diffusers
    • B01F23/23126—Diffusers characterised by the shape of the diffuser element
    • B01F23/231265—Diffusers characterised by the shape of the diffuser element being tubes, tubular elements, cylindrical elements or set of tubes
    • 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

Description

Belüftungseinrichtung für eine feinblasige Belüftung von Wasser, insbesondere Abwasser Bei der feinblasigen Belüftung von Wasser, insbesondere Abwasser, wie sie z. B. bei Belebtschlammanlagen Verwendung findet, wird Druckluft in das zu behandelnde Wasser eingeblasen. Zum Verteilen der Luft in der Flüssigkeit werden luftdurchlässige Platten, Rohre, Dome od. dgl. aus porösem Material verwendet. Da die feinen Poren der Platten, Rohre, Dome od. dgl. im Laufe des Betriebs durch Öl und Staub oder auch durch im Abwasser befindliche Schmutzstoffe leicht verstopfen, treten beim Betrieb derartiger Anlagen häufig erhebliche Störungen auf, die besonders bei unvorhergesehenen Verstopfungen mitunter zu einer völligen Vernichtung der im Belebtschlammbecken notwendigen Mikroorganismen infolge Sauerstoffmangels führen. Es ist deshalb erforderlich, die Belüftungsanlagen sorgfältig zu beobachten und zu warten und bei beobachteten Verstopfungen rasch für deren Beseitigung zu sorgen.Aeration device for fine-bubble aeration of water, in particular Wastewater In the fine-bubble aeration of water, especially wastewater like them z. B. is used in activated sludge systems, compressed air is in the to be treated Water blown in. Air-permeable ones are used to distribute the air in the liquid Plates, tubes, domes or the like made of porous material are used. Because the fine pores the plates, pipes, domes or the like. In the course of operation by oil and dust or also easily clogged by pollutants in the sewage, occur at Operation of such systems often causes considerable disruptions, especially in the event of unforeseen Blockages sometimes lead to a complete destruction of the activated sludge basin necessary microorganisms as a result of lack of oxygen. It is therefore necessary carefully observe and maintain the ventilation systems and when observed To ensure that blockages are removed quickly.

Der Erfindung liegt die Aufgabe zugrunde, im Falle steigender Verstopfung, insbesondere bei Totalverstopfung, der Platten, Rohre, Dome od. dgl. die Abwasserbelüftung nicht zu unterbrechen. Diese Aufgabe wird dadurch gelöst, daß die feinblasige Belüftungseinrichtung mit einem oder mit mehreren zusätzlichen Luftauslässen für eine grobblasige Belüftung versehen ist, die bei einem bestimmten Druckanstieg in der Luftleitung infolge Verstopfung der feinblasigen Belüftungsorgane in Tätigkeit tritt.The invention is based on the object, in the event of increasing constipation, especially in the case of total blockage, the plates, pipes, domes or the like. The sewage aeration not to interrupt. This object is achieved in that the fine-bubble ventilation device with one or more additional air outlets for coarse-bubble ventilation is provided that at a certain pressure increase in the air line as a result of clogging the fine-bubble ventilation organs come into action.

Wenn auch der Sauerstoffeintrag in das Wasser bei der grobblasigen Belüftung geringer ist als bei feinblasiger Belüftung, so ist doch durch die selbsttätig einsetzende grobblasige Belüftung bis zur Behebung der Verstopfung ein sich selbsttätig einstellender Notbetrieb der Anlage, insbesondere eines Belebtschlammbeckens, gewährleistet.Even if the oxygen entry into the water in the coarse-bubble Ventilation is less than with fine-bubble ventilation, so it is automatic commencing coarse-bubble aeration until the blockage is cleared automatically Stopping emergency operation of the plant, in particular an activated sludge basin, is guaranteed.

Die selbsttätige Freigabe des Luftaustrittes durch die Luftauslässe für die grobblasige Belüftung kann mit an den Luftauslässen vorgesehenen feiler- oder gewichtsbelasteten Ventilen erfolgen. Sie bleiben in normalem Betriebszustand verschlossen und werden bei Verstopfungen des feinporigen Materials der Belüftungselemente durch den sich steigernden Überdruck geöffnet. Es ist weiter möglich, die Luftauslässe für die grobblasige Belüftung mit einem elastischen Werkstoff zu verschließen. Diese Verschlüsse weisen Öffnungen auf, die erst beim Übersteigen des Normaldrucks über ein gewisses Maß die Druckluft nach außen entweichen lassen.The automatic release of the air outlet through the air outlets for coarse-bubble aeration, filing provided at the air outlets can be used. or weight-loaded valves. They remain in normal operating condition and are closed in the event of clogging of the fine-pored material of the ventilation elements opened by the increasing overpressure. It is also possible to use the air outlets to close with an elastic material for coarse-bubble ventilation. These Closures have openings that only open when the normal pressure is exceeded Let the compressed air escape to the outside to a certain extent.

Die zweifellos vorteilhafteste Lösung besteht jedoch darin, an der feinblasigen Belüftungseinrichtung ein oder mehrere Tauchrohre unterhalb der porösen Platten, Rohre Dome od. dgl. anzuordnen, deren Länge in Millimetern größer ist als der in Millimetern Wassersäule ausgedrückte, im Normalbetrieb auftretende Druckverlust in dem porösen Belüftungsmaterial.Undoubtedly the most advantageous solution, however, is to join the fine-bubble aeration device one or more dip tubes below the porous Plates, tubes, domes or the like, whose length in millimeters is greater than the pressure loss that occurs during normal operation, expressed in millimeters of water in the porous ventilation material.

Die Zeichnung zeigt mehrere Ausführungsbeispiele von Belüftungseinrichtungen nach der Erfindung.The drawing shows several exemplary embodiments of ventilation devices according to the invention.

Bei der Form nach Abb. 1 ist in der Seitenwandung 2 des Belüftungskastens 3, der durch die poröse Belüftungsplatte 4 abgeschlossen ist, eine Öffnung 5 vorgesehen, die durch das Ventil 6 verschlossen gehalten wird, das unter dem Druck der Feder 7 steht. Beim Erreichen eines bestimmten Überdrucks wird das Ventil 6 geöffnet, und es erfolgt eine grobblasige Belüftung.In the form of Fig. 1 is in the side wall 2 of the ventilation box 3, which is closed by the porous ventilation plate 4, an opening 5 is provided, which is kept closed by the valve 6, which is under the pressure of the spring 7 stands. When a certain overpressure is reached, the valve 6 is opened, and there is a coarse-bubble aeration.

Bei dem Ausführungsbeispiel nach den Abb.2 und 3, von denen die Abb. 2 einen Längsschnitt und die Abb. 3 einen Querschnitt zeigt, erfolgt die feinblasige Belüftung wie bei der Ausführung nach Abb.1 durch die poröse Platte 4, die den Abschluß des Belüftungskastens 3 bildet. Die Druckluft wird dem Kasten 3 in der üblichen Weise durch die Luftleitung 8 zugeführt. An der Unterseite des Belüftungskastens 3 sind zwei nach unten gerichtete Tauchrohre bzw. Belüftungsrohre 9 angeordnet. Im Normalbetrieb herrscht bei dieser Vorrichtung im Lüftungskanal 3 ein Druck von der Größe p1, bei dem das durch die Tauchrohre 9 eintretende Wasser bis zu der dem Druck p1 entsprechenden Höhe 10 verdrängt wird, so daß die Druckluft nur durch das poröse Filtermaterial entweichen kann. Bei zunehmenden Verstopfungen der Platte 4 steigt der Druck im Belüftungskasten 3 an und erreicht beim Abfallen des Luftdurchtritts durch die Platte auf ein zulässiges Mindestmaß eine Größe p2, bei der die Luft aus den Tauchrohren 9 in grobblasiger Form in das Wasser übertritt. Die Wahl der Länge der Tauchrohre 9 bietet die Möglichkeit, den Eintritt der grobblasigen Belüftung in Abhängigkeit von der Verstopfung der Platte 4 zu regeln.In the embodiment according to Figures 2 and 3, of which Fig. 2 shows a longitudinal section and Fig. 3 shows a cross section, the fine-bubble takes place Ventilation as in the embodiment according to Fig. 1 through the porous plate 4, which is the conclusion of the ventilation box 3 forms. The compressed air is the box 3 in the usual Way fed through the air line 8. At the bottom of the ventilation box 3 two downwardly directed immersion pipes or ventilation pipes 9 are arranged. In normal operation, there is a pressure of 3 in this device in the ventilation duct the size p1, in which the entering through the dip tubes 9 water up to the Pressure p1 corresponding height 10 is displaced, so that the compressed air only through the porous filter material can escape. With increasing blockages of the plate 4 the pressure in the ventilation box 3 rises and reaches when the air passage drops through the plate to a minimum allowable size p2 at which the air is out the immersion pipes 9 passes over into the water in coarse-bubble form. The choice of length the immersion tubes 9 offers the possibility of entry of the coarse-bubble To regulate ventilation depending on the clogging of the plate 4.

Die Abb. 4 und 5 zeigen eine Ausführungsform, bei der an Stelle einer ebenen oder leicht gewölbten Platte 4 nach den Abb. 1 bis 3 Filterrohre 11 oder Filterdome Verwendung finden, die an einem Mittelstück 12 befestigt sind. Die Luftzuführung erfolgt durch das Rohr 13. Das Tauchrohr für die grobblasige Belüftung ist wieder mit 9 bezeichnet. Die linke Seite der Darstellung veranschaulicht den Betrieb bei nicht verstopften Filterrohren 11, bei dem der Druck p1 herrscht, die rechte Darstellung zeigt den grobblasigen Betrieb nach Anwachsen des Drucks auf die GrößeFigs. 4 and 5 show an embodiment in which instead of one flat or slightly curved plate 4 according to Figs. 1 to 3 filter tubes 11 or Find filter domes that are attached to a center piece 12. The air supply takes place through pipe 13. The immersion pipe for coarse-bubble aeration is back denoted by 9. The left side of the diagram illustrates the operation at Unclogged filter tubes 11, at which the pressure p1 prevails, the right representation shows the coarse-bubble operation as the pressure increases to size

Claims (1)

PATENTANSPRÜCHE: 1. Belüftungseinrichtung für eine feinblasige Belüftung von Wasser, insbesondere Abwasser, unter Verwendung von in der Flüssigkeit angeordneten luftdurchlässigen Platten, Rohren, Domen od. dgl. aus porösem Material, dadurch gekennzeichnet, daß die Belüftungseinrichtung mit einem oder mit mehreren zusätzlichen Luftauslässen für eine grobblasige Belüftung versehen ist, die. bei einem bestimmten Druckanstieg in der Luftleitung infolge Verstopfung der feinblasigen Belüftungsorgane in Tätigkeit tritt. z. Belüftungseinrichtung nach Anspruch 1, dadurch gekennzeichnet, daß die Luftauslässe für die grobblasige Belüftung mit feder- oder gewichtsbelasteten Ventilen versehen sind. 3. Belüftungseinrichtung nach Anspruch 1, dadurch gekennzeichnet, daß die Luftauslässe für die grobblasige Belüftung mittels eines elastischen Werkstoffes verschlossen sind und diese Verschlüsse Öffnungen aufweisen, die erst beim Übersteigen des Normaldrucks über ein gewisses Maß die Druckluft nach außen entweichen lassen. 4. Belüftungseinrichtung nach Anspruch 1, dadurch gekennzeichnet, daß an der Unterseite der Platten, Rohre, Dome od. dgl. ein nach unten gerichtetes Tauchrohr (9) oder mehrere Tauchrohre angeordnet sind, deren Länge größer ist als die Höhe der Wassersäule, die dem im Normalbetrieb auftretenden Druckverlust beim Durchgang der Luft durch die Poren der Platten, Rohre, Dome od. dgl. entspricht.PATENT CLAIMS: 1. Ventilation device for fine-bubble ventilation of water, especially waste water, using arranged in the liquid air-permeable plates, tubes, domes or the like made of porous material, thereby characterized in that the ventilation device with one or more additional Air outlets are provided for a coarse-bubble ventilation, the. at a certain Pressure increase in the air line as a result of clogging of the fine-bubble ventilation organs comes into action. z. Ventilation device according to claim 1, characterized in that that the air outlets for coarse-bubble ventilation are spring-loaded or weight-loaded Valves are provided. 3. Ventilation device according to claim 1, characterized in that that the air outlets for coarse-bubble ventilation by means of an elastic material are closed and these closures have openings that only when you climb over of normal pressure allow the compressed air to escape to the outside to a certain extent. 4. Ventilation device according to claim 1, characterized in that on the underside the plates, tubes, domes or the like. A downwardly directed immersion tube (9) or several immersion pipes are arranged, the length of which is greater than the height of the water column, the pressure loss that occurs during normal operation when the air passes through the pores of the plates, pipes, domes or the like.
DEP16296A 1956-05-18 1956-05-18 Ventilation device for fine-bubble aeration of water, especially waste water Pending DE1029754B (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
DEP16296A DE1029754B (en) 1956-05-18 1956-05-18 Ventilation device for fine-bubble aeration of water, especially waste water
CH350258D CH350258A (en) 1956-05-18 1957-05-04 Aeration device for fine-bubble aeration of water, in particular waste water
FR1175082D FR1175082A (en) 1956-05-18 1957-05-14 Aeration device for fine bubble aeration of water, especially waste water

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEP16296A DE1029754B (en) 1956-05-18 1956-05-18 Ventilation device for fine-bubble aeration of water, especially waste water

Publications (1)

Publication Number Publication Date
DE1029754B true DE1029754B (en) 1958-05-08

Family

ID=7365958

Family Applications (1)

Application Number Title Priority Date Filing Date
DEP16296A Pending DE1029754B (en) 1956-05-18 1956-05-18 Ventilation device for fine-bubble aeration of water, especially waste water

Country Status (3)

Country Link
CH (1) CH350258A (en)
DE (1) DE1029754B (en)
FR (1) FR1175082A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1214165B (en) * 1959-05-15 1966-04-07 Passavant Werke Method and device for introducing gases into liquids, in particular for aerating waste water
US3953554A (en) * 1973-07-11 1976-04-27 Ashland Vault Incorporated Diffuser for aeration systems
US4048072A (en) * 1975-10-23 1977-09-13 Schramm, Inc. Air diffusers
DE3014169A1 (en) * 1980-04-14 1981-10-15 Nordenskjöld, Reinhart von, Dr.-Ing., 8011 Solalinden Floating air compressor - with open air motor and submerged compressor resting on floats
US4820412A (en) * 1986-02-18 1989-04-11 Meyer Rudolphi Karl U Element for the transfer of gas into liquids, in particular, for the transfer of oxygen in sewage treatment plants

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1214165B (en) * 1959-05-15 1966-04-07 Passavant Werke Method and device for introducing gases into liquids, in particular for aerating waste water
US3953554A (en) * 1973-07-11 1976-04-27 Ashland Vault Incorporated Diffuser for aeration systems
US4048072A (en) * 1975-10-23 1977-09-13 Schramm, Inc. Air diffusers
DE3014169A1 (en) * 1980-04-14 1981-10-15 Nordenskjöld, Reinhart von, Dr.-Ing., 8011 Solalinden Floating air compressor - with open air motor and submerged compressor resting on floats
US4820412A (en) * 1986-02-18 1989-04-11 Meyer Rudolphi Karl U Element for the transfer of gas into liquids, in particular, for the transfer of oxygen in sewage treatment plants

Also Published As

Publication number Publication date
FR1175082A (en) 1959-03-19
CH350258A (en) 1960-11-15

Similar Documents

Publication Publication Date Title
DE2161763C3 (en) Device for conveying waste water from a negative pressure sewage system into a gravity sewer system under normal pressure
EP3133353B1 (en) Water filter cartridge with air flow guidance
DE1029754B (en) Ventilation device for fine-bubble aeration of water, especially waste water
DE1270879B (en) Fuel cleaner
AT200516B (en) Ventilation device for fine-bubble aeration of especially waste water
DE727213C (en) Device for duengen and pest control
EP0535197B1 (en) System for separating biological sludge from purified water
EP0561165B1 (en) Device for treatment of pressurised water in water supply installations
DE1611169A1 (en) Oil container with filter insert
DE2618541A1 (en) Pneumatic conveyor filter separator - has flat pressure vessel forming pure air chamber cover and blowing filters clear
DE808934C (en) Pipe ventilator with valve closure through float body
AT241372B (en) Biological treatment plant for contaminated water
DE2842651A1 (en) Sewage aeration system - with air supply recess in channel bottom with flush fitting porous lid (NL 10.4.79)
DE2740085A1 (en) AUTOMATIC GAS EXHAUST DEVICE
DE4118283C2 (en) Process and device for filtering dirty water
AT233486B (en) Trickling filter system for the biological purification of waste water
DE705354C (en) Loading device for purification plants
DE950720C (en) Device for desludging of elevated water tanks
DE2235301C3 (en) Return sound filter
DE1607308C3 (en) Device for watering cattle
AT254090B (en) Sewage treatment plant for biological wastewater treatment
AT227606B (en) Device for wet treatment, especially for conveying ash, slag, fly ash, dust and the like. like
DE464928C (en) Cleaning device for beer lines or the like.
EP0919524A1 (en) Savety valve for aerators
DE1611105A1 (en) Dirt trap with cleaning device