DE3731998A1 - Apparatus for water aeration - Google Patents
Apparatus for water aerationInfo
- Publication number
- DE3731998A1 DE3731998A1 DE19873731998 DE3731998A DE3731998A1 DE 3731998 A1 DE3731998 A1 DE 3731998A1 DE 19873731998 DE19873731998 DE 19873731998 DE 3731998 A DE3731998 A DE 3731998A DE 3731998 A1 DE3731998 A1 DE 3731998A1
- Authority
- DE
- Germany
- Prior art keywords
- hose
- strength member
- cross
- strength
- connections
- 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- Withdrawn
Links
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 11
- 238000005273 aeration Methods 0.000 title abstract description 3
- 238000004519 manufacturing process Methods 0.000 claims description 4
- 230000002787 reinforcement Effects 0.000 claims description 4
- 238000005507 spraying Methods 0.000 claims description 3
- 238000009423 ventilation Methods 0.000 claims description 3
- 238000004080 punching Methods 0.000 claims description 2
- 230000015572 biosynthetic process Effects 0.000 claims 1
- 239000013013 elastic material Substances 0.000 claims 1
- 230000000087 stabilizing effect Effects 0.000 claims 1
- 229910000831 Steel Inorganic materials 0.000 description 8
- 239000010959 steel Substances 0.000 description 8
- 239000000463 material Substances 0.000 description 3
- 239000000969 carrier Substances 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 230000000994 depressogenic effect Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000008719 thickening Effects 0.000 description 1
Classifications
-
- 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
- B01F23/23124—Diffusers consisting of flexible porous or perforated material, e.g. fabric
- B01F23/231241—Diffusers consisting of flexible porous or perforated material, e.g. fabric the outlets being in the form of perforations
- B01F23/231242—Diffusers consisting of flexible porous or perforated material, e.g. fabric the outlets being in the form of perforations in the form of slits or cut-out openings
-
- 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
- C02F3/201—Perforated, resilient plastic diffusers, e.g. membranes, sheets, foils, tubes, hoses
-
- 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
- B01F23/2311—Mounting the bubbling devices or the 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
- B01F23/2311—Mounting the bubbling devices or the diffusers
- B01F23/23114—Mounting the bubbling devices or the diffusers characterised by the way in which the different elements of the bubbling installation are mounted
- B01F23/231142—Mounting the gas transporting elements, i.e. connections between conduits
-
- 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
- B01F23/2311—Mounting the bubbling devices or the diffusers
- B01F23/23115—Mounting the bubbling devices or the diffusers characterised by the way in which the bubbling devices are mounted within the receptacle
- B01F23/231152—Mounting the bubbling devices or the diffusers characterised by the way in which the bubbling devices are mounted within the receptacle the bubbling devices being supported, e.g. on cables or laying on the bottom
-
- 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
- B01F23/231232—Diffusers consisting of rigid porous or perforated material the outlets being in the form of perforations in the form of slits or cut-out openings
-
- 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
- B01F23/23124—Diffusers consisting of flexible porous or perforated material, e.g. fabric
-
- 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
-
- 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)
- Chemical Kinetics & Catalysis (AREA)
- Life Sciences & Earth Sciences (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)
- Rigid Pipes And Flexible Pipes (AREA)
Abstract
Description
Die Erfindung betrifft eine Vorrichtung zur Wasserbelüftung mit einem Schlauch aus Gummi oder gummiähnlichen Werkstoffen, wobei der Schlauch mit einer Vielzahl kleiner Schlitze zum Luftdurchtritt versehen ist, die in längs zum Schlauch verlaufenden Reihen und quer dazu angeordnet sind.The invention relates to a device for Water ventilation with a rubber hose or rubber-like materials, the hose with a variety of small slots for air passage is provided in the longitudinal to the hose Rows and arranged transversely to it.
Vorrichtungen dieser Art haben den Vorteil, dass sich die Schlitze unter dem Innendruck öffnen und wieder wasserdicht schliessen, wenn der Innendruck nachlässt. Gummischläuche lassen sich zudem in ein facher Weise in beliebig grossen Längen herstellen, sie haben aber den Nachteil, dass sie innerhalb des Wassers nicht gespannt und insb. nicht gegen seit lichen Versatz ohne weiteres gesichert werden kön nen.Devices of this type have the advantage that the slits open under the internal pressure and close again watertight if the internal pressure subsides. Rubber hoses can also be inserted into one manufacture in lengths of any length, but they have the disadvantage that they are within the Not tense water and especially not against offset can be easily secured nen.
Der Erfindung liegt die Aufgabe zugrunde, die ein gangs erwähnten Vorrichtungen so zu verbessern, dass die Schläuche in grossen Längen verwendet und gegen seitliches Versetzen ohne weiteres gesichert werden können.The invention is based on the object gangs mentioned to improve so that the hoses used in great lengths and against lateral displacement can be easily secured can.
Zur Lösung dieser Aufgabe ist erfindungsgemäss der Schlauch mit einem biegsamen, in Längsrichtung verlaufenden, seilartigen Festigkeitsträger versehen, der vorzugsweise in den unteren Querschnittsbereich des Schlauches eingelegt wird und während der Schlauchherstellung ( durch Spritzen ) in den Schlauchkörper eingebracht, aber auch nachträglich mit dem Schlauch zum Beispiel durch Einknöpfen in hakenförmige Ansätze des Schlauchkörpers verbunden werden kann. Zweckmässigerweise wird darüber hinaus der Schlauch so ausgeführt, dass er über eine aus reichende Hüllsteifigkeit verfügt, also weder durch den Innendruck noch durch den Wasserdruck wesentlich verformt werden kann, um so zu verhindern, dass beim Betrieb des Schlauches ein ungehinderter Luft durchtritt infragegestellt ist. Die dazu erforderlichen Massnahmen werden durch eine geeignete Werkstoff qualität und eine entsprechende Bemessung der Wandung des Schlauches sichergestellt. Vorteilhaft ist es ferner, wenn die erwähnten Luftschlitze im oberen Quer schnittsbereich des Schlauches vorgesehen, wäh rend sich der oben erwähnte Festigkeitsträger im un teren Querschnittsbereich des Schlauches befindet.According to the invention, to achieve this object Hose with a flexible, lengthways extending, rope-like reinforcement, which is preferably in the lower cross-sectional area the hose is inserted and during the Hose production (by spraying) in the Hose body introduced, but also afterwards with the hose, for example by buttoning it connected in hook-shaped approaches of the hose body can be. In addition, it is expedient the hose runs so that it has an off sufficient envelope stiffness, so neither the internal pressure still significantly due to the water pressure can be deformed so as to prevent unimpeded air when operating the hose passage is questioned. The necessary Measures are taken through a suitable material quality and a corresponding dimensioning of the wall of the hose ensured. It is also advantageous if the mentioned louvers in the upper cross section of the hose provided, wäh rend the above-mentioned reinforcement in the un lower cross-sectional area of the hose.
Eine geeignete Fixierung des Schlauches erfolgt nunmehr durch Straffen des Festigkeitsträgers, dem ggfs. Querverstrebungen zugeordnet werden können. Indesen kann der Schlauch ausschliesslich aus Gummi od. dgl. gefertigt werden, wobei es vorteilhaft ist, den so gefertigten Schlauch zunächst durch Stanzen od. dgl. zu schlitzen, um ihn erst dann mit dem Festigkeits träger auszustatten. A suitable fixation of the hose now takes place by tightening the reinforcement, which if necessary. Cross struts can be assigned. Meanwhile the hose can be made entirely of rubber or the like. are manufactured, it being advantageous to the so manufactured hose first by punching or the like. to slit it only with the strength equip carriers.
Die Erfindung eröffnet auch die Möglichkeit, die Festigkeitsträger von zwei oder mehreren Schläuchen netzartig miteinander zu verbinden, z.B. Querverbindungen zwischen den Festigkeits trägern vorzusehen. Damit kann die Wirksamkeit einer Belüftungsanlage gesteigert und die Steifig keit der Anlage gegen Strömung oder andere äussere Kräfte vergrössert werden.The invention also opens up the possibility of the strength members of two or more To connect hoses to each other like a net, e.g. Cross connections between the strength to provide carriers. So that the effectiveness a ventilation system increased and the stiff system against flow or other external Forces are increased.
Weitere Einzelheiten der Erfindung werden anhand der Zeichnung erläutert, in der Ausführungsbei spiele der Erfindug dargestellt sind.Further details of the invention will be given the drawing explained in the execution games of the invention are shown.
Es zeigenShow it
Fig. 1 einen Querschnitt durch einen Wasserbelüftungs schlauch, Fig. 1 a cross section through a water hose aeration,
Fig. 2 den Schlauch gemäss Fig. 1 in der Teilseiten ansicht,View Fig. 2 shows the hose according to Fig. 1 in the sub-pages,
Fig. 3 eine Draufsicht auf den installierten, im Wasser befindlichen Schlauch gemäss Fig. 2, jedoch im Verein mit einem weiteren Schlauch, Fig. 3 is a plan view of the installed, in the water hose according to FIG. 2, but in conjunction with a further hose,
Fig. 4 und 5 je einen abgewandelten Schlauch im Querschnitt. FIGS. 4 and 5 depending on a modified tube in cross section.
Der Schlauch 1 besteht ausschliesslich aus Gummi. Er ist durch Spritzen und anschliessendes Vulkanisieren gefertigt worden. In der oberen Hälfte seines Querschnitts ist der Schlauch 1 mit in Längsreihen dicht bei dicht angeordneten Schlitzen 2 versehen, die eine Länge von etwa 0.7-2 mm haben. Die Reihen sind über die oberen Hälfte des Schlauches 1 gleichmässig verteilt. The hose 1 consists exclusively of rubber. It was made by spraying and then vulcanizing. In the upper half of its cross-section, the tube 1 is provided with slots 2 , which are close to one another in the longitudinal rows and have a length of about 0.7-2 mm. The rows are evenly distributed over the upper half of the hose 1 .
Es ist ggfs. vorteilhaft, die Schlitze 2 nur zonen weise, also nur in begrenzten Längenabschnitten des Schlauches 1 anzuordnen und zwischen den Zonen schlitzfreie Längenbereiche zu belassen, um so Schläuche 1 grösserer Länge gleichmässiger beschicken und einen gleichmässigeren Luftaustritt über die Schlauchlänge hinweg sicherstellen zu können.It may be advantageous to arrange the slits 2 only in zones, i.e. only in limited lengths of the hose 1, and to leave slot-free length areas between the zones, in order to load hoses 1 of greater length more evenly and to ensure a more uniform air outlet over the length of the hose .
Der Querschnitt und der Werkstoff des Schlauches 1 sind so bemessen, dass er nicht unter dem Wasser druck stark eingedrückt bzw. unter dem Innendruck nicht gebläht werden kann.The cross-section and the material of the hose 1 are dimensioned such that it cannot be strongly depressed under the water pressure or inflated under the internal pressure.
Im unteren, nicht geschlitzten Abschnitt des Schlauches 1 befindet sich in einer wulstartigen Verdickung 3 ein eingebettetes Stahlseil 4, das biegsam ist, jedoch über eine gute Zugfestigkeit ver fügt. Das Stahlseil 4 wurde beim Spritzen des Schlauches 1 in den Querschnitt eingebracht.In the lower, not slotted section of the hose 1 there is an embedded steel cable 4 in a bead-like thickening 3 , which is flexible, but has a good tensile strength. The steel cable 4 was introduced into the cross section when the hose 1 was sprayed.
Das Stahlseil 4 überragt die Schlauchenden 5, kann dort mit einem Spannschloss 6 versehen sein und ist über eine Öse 7 an einem Haken 8 verankert, der Rand des zu belüftenden Gewässers befestigt ist. Vom Schlauch 1 aus gehen am Ende ggfs. über eine Armatur 9 Druckluftzuleitungen 10 aus, die zu einer Druckluftquelle geführt sind.The steel cable 4 projects over the hose ends 5 , can be provided there with a turnbuckle 6 and is anchored via an eyelet 7 to a hook 8 , the edge of the water to be aerated is fastened. At the end of the hose 1, compressed air supply lines 10 , which lead to a compressed air source, go out via a fitting 9 .
Durch Anziehen des Stahlseiles 4 wird dieses gestrafft. Damit wird der Schlauch 1 entsprechend fixiert und gehalten, ohne die Funktion des Schlauches 1 zu stören.Tightening the steel cable 4 tightens it. The hose 1 is accordingly fixed and held without disturbing the function of the hose 1 .
Gemäss Fig. 3 sind zwei parallele Schläuche 1 vorgesehen, die durch Querverbindungen 11 ihrer Stahlseile 4 stabilisiert sind, insb. in verbesserter Art gegenüber Querbeanspruchungen. According to FIG. 3, two parallel hoses 1 are provided, which are stabilized by cross connections 11 of their steel cables 4 , in particular in an improved manner with respect to transverse loads.
Bei der Ausführung gemäss Fig. 4 ist der Schlauch 1 unten mit einer elastisch aufklappbaren Klammer 12 versehen, die beim Spritzen des Schlauchkörpers gefertigt wird. In den so geschaffenen Hohlraum 13 wird das Stahlseil 4 nachträglich eingelegt.In the embodiment according to FIG. 4, the hose 1 is provided at the bottom with an elastically hinged clamp 12 , which is produced when the hose body is sprayed. The steel cable 4 is subsequently inserted into the cavity 13 thus created.
Gemäss Fig. 5 ist der Schlauch 1 flach, im wesentlichen oval gehalten. Er hat unten im Bereich seiner Ränder zwei Klammern 12 und demgemäss zwei Stahlseile 4, die zu einer erhöhten Quersteifigkeit des Verbandes führen.As shown in FIG. 5 is flat, maintaining the hose 1 substantially oval. At the bottom in the area of its edges, it has two clips 12 and accordingly two steel cables 4 , which lead to increased transverse rigidity of the association.
Aufgrund der Erfindung können Schläuche 1 vergleichsweise grosser Länge angewendet werden; es ist sichergestellt, dass nachteilige Lateralbewegungen nicht eintreten können. Es ist darüber hinaus nicht ausgeschlossen, die Stahlseile 4 und ihre Querverbindungen 11 noch mit Schwimmkörpern, Verankerungen oder ähnlichen Mitteln auszustatten, um eine gewünschte Lage des bzw. der Schläuche 1 zu gewährleisten.Due to the invention, tubes 1 of comparatively great length can be used; it is ensured that adverse lateral movements cannot occur. It is also not excluded to equip the steel cables 4 and their cross connections 11 with floating bodies, anchorages or similar means in order to ensure a desired position of the hose (s ) 1 .
Claims (11)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19873731998 DE3731998A1 (en) | 1987-09-23 | 1987-09-23 | Apparatus for water aeration |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19873731998 DE3731998A1 (en) | 1987-09-23 | 1987-09-23 | Apparatus for water aeration |
Publications (1)
Publication Number | Publication Date |
---|---|
DE3731998A1 true DE3731998A1 (en) | 1989-04-06 |
Family
ID=6336663
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE19873731998 Withdrawn DE3731998A1 (en) | 1987-09-23 | 1987-09-23 | Apparatus for water aeration |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE3731998A1 (en) |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1991016125A1 (en) * | 1990-04-20 | 1991-10-31 | Schuessler Karl Heinz | Device for aerating liquids |
WO1993025484A1 (en) * | 1992-06-09 | 1993-12-23 | Lanmark (Water) Limited | Fluid diffuser |
US5868971A (en) * | 1994-06-17 | 1999-02-09 | Dipl.-Ing. Udo Meyer Aquaconsult Ges. M.B.H. | Device for introducing gases into liquids in fine bubbles |
WO2017218426A1 (en) * | 2016-06-12 | 2017-12-21 | Tucker Randall L | Collector with return and silt basin, bubbler, and process |
DE102018129749B3 (en) | 2018-11-26 | 2019-12-05 | Arnold Jäger Holding GmbH | Ventilation system for aerating a liquid, in particular waste water, and liquid container |
WO2020043704A1 (en) * | 2018-08-27 | 2020-03-05 | Martin Stachowske | Apparatus for gassing liquids having at least one linear gassing unit |
-
1987
- 1987-09-23 DE DE19873731998 patent/DE3731998A1/en not_active Withdrawn
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1991016125A1 (en) * | 1990-04-20 | 1991-10-31 | Schuessler Karl Heinz | Device for aerating liquids |
WO1993025484A1 (en) * | 1992-06-09 | 1993-12-23 | Lanmark (Water) Limited | Fluid diffuser |
US5868971A (en) * | 1994-06-17 | 1999-02-09 | Dipl.-Ing. Udo Meyer Aquaconsult Ges. M.B.H. | Device for introducing gases into liquids in fine bubbles |
WO2017218426A1 (en) * | 2016-06-12 | 2017-12-21 | Tucker Randall L | Collector with return and silt basin, bubbler, and process |
WO2020043704A1 (en) * | 2018-08-27 | 2020-03-05 | Martin Stachowske | Apparatus for gassing liquids having at least one linear gassing unit |
DE102018129749B3 (en) | 2018-11-26 | 2019-12-05 | Arnold Jäger Holding GmbH | Ventilation system for aerating a liquid, in particular waste water, and liquid container |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
8139 | Disposal/non-payment of the annual fee |