DE4314766C1 - Compressed-air aeration device for water and wastewater - Google Patents
Compressed-air aeration device for water and wastewaterInfo
- Publication number
- DE4314766C1 DE4314766C1 DE19934314766 DE4314766A DE4314766C1 DE 4314766 C1 DE4314766 C1 DE 4314766C1 DE 19934314766 DE19934314766 DE 19934314766 DE 4314766 A DE4314766 A DE 4314766A DE 4314766 C1 DE4314766 C1 DE 4314766C1
- Authority
- DE
- Germany
- Prior art keywords
- water
- compressed
- membrane
- aeration device
- wastewater
- 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.)
- Expired - Fee Related
Links
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims description 8
- 238000005273 aeration Methods 0.000 title abstract 2
- 239000002351 wastewater Substances 0.000 title description 3
- 239000011248 coating agent Substances 0.000 claims abstract description 8
- 238000000576 coating method Methods 0.000 claims abstract description 8
- 239000012528 membrane Substances 0.000 claims abstract description 8
- 239000011148 porous material Substances 0.000 claims abstract description 7
- 238000009423 ventilation Methods 0.000 claims description 9
- 229920005830 Polyurethane Foam Polymers 0.000 claims description 2
- 229920000728 polyester Polymers 0.000 claims description 2
- 239000011496 polyurethane foam Substances 0.000 claims description 2
- 238000004065 wastewater treatment Methods 0.000 claims description 2
- 239000000463 material Substances 0.000 abstract description 6
- 241000894006 Bacteria Species 0.000 abstract description 3
- 238000005352 clarification Methods 0.000 abstract description 2
- 230000035515 penetration Effects 0.000 abstract 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 3
- 229920001971 elastomer Polymers 0.000 description 3
- 229910052760 oxygen Inorganic materials 0.000 description 3
- 239000001301 oxygen Substances 0.000 description 3
- 239000004033 plastic Substances 0.000 description 3
- 229920003023 plastic Polymers 0.000 description 3
- 206010010774 Constipation Diseases 0.000 description 2
- 238000005276 aerator Methods 0.000 description 2
- 239000000919 ceramic Substances 0.000 description 2
- 239000002657 fibrous material Substances 0.000 description 2
- 229920000426 Microplastic Polymers 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 230000005489 elastic deformation Effects 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000004810 polytetrafluoroethylene Substances 0.000 description 1
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
- 239000007787 solid Substances 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
- B01F23/231245—Fabric in the form of woven, knitted, braided, non-woven or flocculated fibers or filaments
-
- 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
- B01F23/2312—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
- B01F23/23124—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
- B01F23/231262—Diffusers characterised by the shape of the diffuser element having disc shape
-
- 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)
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Textile Engineering (AREA)
- Biodiversity & Conservation Biology (AREA)
- Microbiology (AREA)
- Hydrology & Water Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Organic Chemistry (AREA)
- Biological Treatment Of Waste Water (AREA)
Abstract
Description
Die Erfindung bezieht sich auf eine Druckluftbelüftungseinrichtung für biologisch arbeitende Stufen von Wasser- und Abwasserbehandlungsanlagen.The invention relates to a Compressed air ventilation device for biologically working Levels of water and wastewater treatment plants.
Bei der biologischen Behandlung von Wasser und Abwasser muß Sauerstoff in das Wasser eingetragen werden. Dies geschieht unter anderem durch Einblasen von Luft unter Druck. Dabei ist es vorteilhaft, möglichst kleine Luftblasen zu erzeugen, da die Austauschfläche für den Sauerstoffübertritt in das Wasser wesentlich größer ist als bei großen Luftblasen. Als Druckluftbelüftungseinrichtungen sind rohr-, teller- oder flächenförmige Körper im Einsatz. Die Membran, deren Durchtrittsöffnungen die Luftblasen erzeugen, ist als geschlitzte Gummifolie, gesinterte Keramik oder gesintertes Kunststoffgranulat verschiedener Korngröße ausgebildet. Die elastische Gummifolie hat den Nachteil, daß die Schlitze beim elastischen Verformen mit aufgeweitet werden, so daß partiell sehr große Luftblasen entstehen, Kunststoff- oder Keramiksinterkörper verstopfen bei intermittierendem Betrieb in den Abschaltpausen mit den Wasserinhaltsstoffen und werden beim Wiedereinschalten nicht freigespült.In the biological treatment of water and wastewater Oxygen can be introduced into the water. this happens among other things by blowing air under pressure. Here it is advantageous to generate the smallest possible air bubbles, because the exchange surface for the oxygen transfer into the Water is much larger than with large air bubbles. When Compressed air ventilation devices are pipe, plate or sheet-like body in use. The membrane, the Passages that create air bubbles is as slotted rubber sheet, sintered ceramic or sintered Plastic granules of various grain sizes are formed. The elastic rubber film has the disadvantage that the slots be widened with the elastic deformation, so that very large air bubbles arise, plastic or Ceramic sintered bodies clog during intermittent operation in the switch-off breaks with the water constituents and are not flushed out when switched on again.
Es ist auch schon versucht worden, die aus der Abluftfilterung bekannten Filtermaterialien, z. B. Filze mit einer Faserstärke zwischen 10 und 100 µm, in modifizierter Form einzusetzen (DE-A-32 27 671). Die Modifizierung bestand insbesondere darin, das Fasermaterial mit einem aushärtbaren Kunststoff, z. B. PTFE, zu tränken. Dabei hat der aushärtbare Kunststoff auch eine verbindende Wirkung, so daß sich das Fasermaterial z. B. in die Form von Belüftungskerzen pressen läßt, die eigensteif sind.It has also been tried out of the Exhaust air filtering known filter materials, e.g. B. felts with a fiber thickness between 10 and 100 µm, in modified Use form (DE-A-32 27 671). The modification consisted, in particular, of the fiber material with a curable plastic, e.g. B. PTFE to soak. Doing the curable plastic also has a connecting effect, so that the fiber material z. B. in the form of Can press ventilation candles that are inherently rigid.
Obwohl diese Ausführungsform den Nachteil der Verstopfungsanfälligkeit nicht mehr aufweist, besteht weiterhin der Wunsch, einen Belüftungskörper zur Verfügung zu haben, der die verschiedensten Formen annehmen kann. So werden in bestimmten Anwendungsfällen flächenhafte, z. B. tellerförmige oder rechteckige Belüftungskörper benötigt. Hierfür kommen nur Ausführungsformen mit einem die Luftzufuhr aufweisenden Trägerkörper in Frage, der von einer Membran überspannt ist. Außerdem weist Filzmaterial eine stark wechselnde Porengröße auf, die dann doch zu Verstopfungen durch festwachsende Bakterien führt.Although this embodiment has the disadvantage of Is no longer susceptible to constipation the desire to have a ventilator available to have that can take a variety of forms. So are areal in certain applications, e.g. B. plate-shaped or rectangular ventilation body required. For this, only embodiments come with a Carrier body having air supply in question, that of a Membrane is spanned. In addition, felt material has a greatly changing pore size, which then too Constipation caused by bacteria that grow in solid.
Die vorgeschilderte Aufgabe wird nunmehr erfindungsgemäß dadurch gelöst, daß eine am Trägerkörper randeingespannte Membran aus Nadelfilz verwendet wird, die abströmseitig mit einer unlösbar aufgebrachten porösen Beschichtung versehen ist, deren Porengröße unter 100 µm liegt. Diese Porengröße ist so bemessen, daß in den Betriebspausen die Bakterien sich an der Oberfläche der Beschichtung ablagern und nicht mehr in den Filz eindringen. Im Betrieb sorgt diese geringe Porengröße darüberhinaus dafür, daß über die ganze Fläche gleichbleibend kleine Luftblasen erzeugt werden. Der gleichbleibende Druckverlust sorgt auch dafür, daß bereits bei niedriger Beaufschlagung von z. B. 15 m3 Luft/h. m2 die ganze Fläche wirksam ist. Das beschichtete Filzmaterial kann in Bahnen geliefert und dann auf die beliebige Flächenform zugeschnitten werden.The above-described object is now achieved in accordance with the invention in that a membrane made of needle felt, which is clamped on the edge of the support body, is provided on the outflow side with an insoluble applied porous coating, the pore size of which is below 100 μm. This pore size is dimensioned so that the bacteria are deposited on the surface of the coating during the breaks and no longer penetrate into the felt. In operation, this small pore size also ensures that small air bubbles are generated over the entire area. The constant pressure loss also ensures that even at low loads of z. B. 15 m 3 air / h. m 2 the entire area is effective. The coated felt material can be supplied in sheets and then cut to any shape.
Im Betrieb mit den neuen Belüftungseinrichtungen hat sich eine hohe Beständigkeit gegen alle Wasser- und Abwasserarten gezeigt. Dadurch, daß schon bei kleinen Luftmengen die volle Beaufschlagung mit großer Blasenzahl gewährleistet ist, können die gering belasteten biologischen Klärstufen, in denen diese Belüftungskörper eingesetzt werden, optimal umgewälzt werden. Die Blasengröße übersteigt in keinem Fall 2 mm. Gegenüber Tellerbelüftern mit geschlitzter Gummifolie steigt der Sauerstoffeintrag um mindestens 20% und die Ökonomie, d. h. die Energieausnützung, um denselben Wert.In operation with the new ventilation devices high resistance to all types of water and waste water shown. Because even with small amounts of air the full Loading with a large number of bubbles is guaranteed, can the slightly contaminated biological clarification stages, in where these ventilation bodies are used, optimal be circulated. The bubble size never exceeds 2 mm. Opposite plate aerators with slotted rubber film the oxygen input increases by at least 20% and that Economy, d. H. the use of energy to the same value.
In vorteilhafter Ausgestaltung der Erfindung besteht die Beschichtung des Filzmaterials aus einem Polyurethanschaum geringer Dicke. Ihre Porengröße liegt unter 100 µm. Die Filamente des Filzmaterials bestehen vorzugsweise aus abwasserbeständigem Polyester. Die Beschichtung ist unlösbar mit dem Filz verbunden und übersteht die bei den Wiederinbetriebnahmen eintretenden Wölbungen und Dehnungen ohne Veränderung des Blasenbildes.In an advantageous embodiment of the invention Coating of the felt material from a polyurethane foam small thickness. Their pore size is less than 100 µm. The Filaments of the felt material preferably consist of sewage-resistant polyester. The coating is insoluble connected to the felt and survives the Recommissioning bulges and strains without changing the bubble pattern.
Die Abb. zeigt einen Schnitt durch die Mittenachse eines mit der erfindungsgemäßen Membran bespannten Tellerbelüfters. Der kreisförmige Trägerkörper 1 besitzt rückseitig den Anschlußstutzen 2 für die Druckluftzufuhr. Der Rand enthält Gewindesacklöcher 3, in denen der den Filzzuschnitt 4 einspannende Ring 5 befestigt wird (Schrauben 6).The figure shows a section through the center axis of a plate aerator covered with the membrane according to the invention. The circular support body 1 has on the back the connecting piece 2 for the compressed air supply. The edge contains threaded blind holes 3 in which the ring 5 which clamps the felt blank 4 is fastened (screws 6 ).
Claims (3)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19934314766 DE4314766C1 (en) | 1993-05-05 | 1993-05-05 | Compressed-air aeration device for water and wastewater |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19934314766 DE4314766C1 (en) | 1993-05-05 | 1993-05-05 | Compressed-air aeration device for water and wastewater |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE4314766C1 true DE4314766C1 (en) | 1994-09-08 |
Family
ID=6487176
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DE19934314766 Expired - Fee Related DE4314766C1 (en) | 1993-05-05 | 1993-05-05 | Compressed-air aeration device for water and wastewater |
Country Status (1)
| Country | Link |
|---|---|
| DE (1) | DE4314766C1 (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0744169A2 (en) * | 1995-05-23 | 1996-11-27 | Biocomfort Produkte zur Gesundheitspflege GmbH | Bath aerating mat with air outflow plates |
| DE19722781A1 (en) * | 1997-05-30 | 1998-12-03 | Ott Rita | Gassing unit for liquids, especially for aerating waste water |
| EP1545753A1 (en) * | 2002-08-13 | 2005-06-29 | Itt Manufacturing Enterprises, Inc. | Strip diffuser pct i |
| DE102008047092A1 (en) * | 2008-09-12 | 2010-03-18 | Rehau Ag + Co. | Plate ventilator for wastewater treatment |
| US8002249B2 (en) | 2002-08-13 | 2011-08-23 | Itt Manufacturing Enterprises, Inc. | Strip diffuser |
| WO2011127914A1 (en) * | 2010-04-15 | 2011-10-20 | Ott Friederike | Gassing device for introducing a gas into a liquid |
| WO2011129947A1 (en) * | 2010-04-12 | 2011-10-20 | Itt Manufacturing Enterprises, Inc. | End seals for aeration diffuser assembly |
| EP2497575A1 (en) * | 2011-03-11 | 2012-09-12 | Siemens Aktiengesellschaft | Flotation device with a gas diffuser made from a foam material |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3227671A1 (en) * | 1982-07-23 | 1984-01-26 | Reinhart von Dr.-Ing. 8011 Solalinden Nordenskjöld | Aeration element for feeding air or oxygen into the waste water of purification plants or into natural waters |
| DE3429197C1 (en) * | 1984-08-08 | 1986-01-30 | Dieter 6369 Niederdorfelden Feike | Aerator for enriching a liquid with a gas |
-
1993
- 1993-05-05 DE DE19934314766 patent/DE4314766C1/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3227671A1 (en) * | 1982-07-23 | 1984-01-26 | Reinhart von Dr.-Ing. 8011 Solalinden Nordenskjöld | Aeration element for feeding air or oxygen into the waste water of purification plants or into natural waters |
| DE3429197C1 (en) * | 1984-08-08 | 1986-01-30 | Dieter 6369 Niederdorfelden Feike | Aerator for enriching a liquid with a gas |
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0744169A3 (en) * | 1995-05-23 | 1997-01-29 | Biocomfort Gmbh | Bath aerating mat with air outflow plates |
| EP0744169A2 (en) * | 1995-05-23 | 1996-11-27 | Biocomfort Produkte zur Gesundheitspflege GmbH | Bath aerating mat with air outflow plates |
| DE19722781A1 (en) * | 1997-05-30 | 1998-12-03 | Ott Rita | Gassing unit for liquids, especially for aerating waste water |
| US8002249B2 (en) | 2002-08-13 | 2011-08-23 | Itt Manufacturing Enterprises, Inc. | Strip diffuser |
| EP1545753A1 (en) * | 2002-08-13 | 2005-06-29 | Itt Manufacturing Enterprises, Inc. | Strip diffuser pct i |
| EP1545753A4 (en) * | 2002-08-13 | 2007-03-07 | Itt Mfg Enterprises Inc | Strip diffuser pct i |
| EP2110170A3 (en) * | 2002-08-13 | 2009-12-09 | ITT Manufacturing Enterprises Inc. | Membrane strip diffuser for wastewater treatment |
| DE102008047092A1 (en) * | 2008-09-12 | 2010-03-18 | Rehau Ag + Co. | Plate ventilator for wastewater treatment |
| WO2011129947A1 (en) * | 2010-04-12 | 2011-10-20 | Itt Manufacturing Enterprises, Inc. | End seals for aeration diffuser assembly |
| US8371561B2 (en) | 2010-04-12 | 2013-02-12 | Xylem Ip Holdings Llc | Aeration diffuser assembly end seal |
| CN102985173A (en) * | 2010-04-12 | 2013-03-20 | 赛乐姆知识产权控股有限责任公司 | Aeration diffuser assembly end seal |
| CN102985173B (en) * | 2010-04-12 | 2014-12-24 | 赛乐姆知识产权控股有限责任公司 | Aeration diffuser assembly end seal |
| WO2011127914A1 (en) * | 2010-04-15 | 2011-10-20 | Ott Friederike | Gassing device for introducing a gas into a liquid |
| EP2497575A1 (en) * | 2011-03-11 | 2012-09-12 | Siemens Aktiengesellschaft | Flotation device with a gas diffuser made from a foam material |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 8100 | Publication of patent without earlier publication of application | ||
| D1 | Grant (no unexamined application published) patent law 81 | ||
| 8364 | No opposition during term of opposition | ||
| 8339 | Ceased/non-payment of the annual fee |