EP1680367A1 - Gassing device - Google Patents
Gassing deviceInfo
- Publication number
- EP1680367A1 EP1680367A1 EP04790903A EP04790903A EP1680367A1 EP 1680367 A1 EP1680367 A1 EP 1680367A1 EP 04790903 A EP04790903 A EP 04790903A EP 04790903 A EP04790903 A EP 04790903A EP 1680367 A1 EP1680367 A1 EP 1680367A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- membrane
- elastic material
- fumigation device
- liquid
- introducing
- 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- Withdrawn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
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
- 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
- B01F23/23124—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
- B01F23/23128—Diffusers having specific properties or elements attached thereto
- B01F23/231281—Diffusers having specific properties or elements attached thereto made of or comprising a biocide
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/50—Treatment of water, waste water, or sewage by addition or application of a germicide or by oligodynamic treatment
- C02F1/505—Treatment of water, waste water, or sewage by addition or application of a germicide or by oligodynamic treatment by oligodynamic treatment
-
- 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
Definitions
- the invention relates to a gassing device for introducing a gas into a liquid, in particular air into waste water, with at least one inlet body and a membrane made of an elastic material, the membrane having openings for introducing the gas into the liquid.
- This gassing device for biologically working stages of water and wastewater treatment plants consists of a carrier body with rear air supply and an edge-clamped membrane, which is made of a needle felt.
- This gassing device is to be improved in that the membrane is provided on the outflow side with an insoluble applied porous coating, the pore size of which should be less than 100 ⁇ m and which should consist of a polyurethane foam.
- the pore size of the coating of this fumigation device should be such that during the breaks in operation the bacteria or microorganisms but also the other aggressive substances dissolved in the waste water are deposited on the surface of the coating and do not penetrate into the needle felt and lead to damage or blockage of the fumigation device.
- the coating made of the polyurethane foam should withstand the curvatures and strains that occur when the gassing device is put back into operation without any change, with consistently small air bubbles being generated over the entire area of the gassing device.
- a generic gassing device is described in DE 38 19 305.
- the introduction body of this gassing device consists of a polymeric material and the membrane of an elastomeric material.
- This gassing device is used in sewage treatment plants, which contain a high proportion of industrial waste water with partly aggressive substances.
- these gassing devices there have been restrictions on the life of the membrane from the elastic material. It could be determined that the surface of the membrane is not homogeneously smooth due to the material properties of the elastomeric material, but has a rough surface with pores.
- the embrittlement or aging of the elastic material of the membrane also reduces the self-cleaning effect of the gassing device, which leads to the openings in the membrane becoming blocked.
- the disadvantageous consequences of this are the decrease in the amount of gas that can be introduced into the wastewater and thus a reduction in the effectiveness of the gassing device, as well as an increase in pressure of the systems used in industrial wastewater, which in turn causes increased energy consumption but at the same time also increases the load on the individual components, in particular Membrane made of the elastic material.
- a generic gassing device for introducing a gas into a liquid, in particular air into waste water, consists of at least one inlet body made of plastic and a membrane made of an elastic material with perforation holes for introducing the gas into the liquid.
- This gassing device With this gassing device, the known tendency to incrustation is reduced and the original material properties are largely retained. This is to be solved by providing the surface of the membrane with a homogeneous protective layer. On the one hand, this protective layer should be Teflon, silicone, special rubber, anti-slip varnish or an insulating varnish.
- a disadvantage of this gassing device is seen in the fact that the application of such a protective layer is very time-consuming and cost-intensive, but it cannot be ensured that this coating will withstand the stresses caused by the aggressive substances contained in the industrial wastewater.
- the poor adhesion of the protective layer to the membrane the lack of long-term stability speaks against the use of such a fumigation device.
- Another disadvantage is seen in the fact that, in particular, the solvents or microorganisms contained in the industrial wastewater damage the protective layer, so that it peels off and enters the wastewater and thus on the one hand leads to an additional pollution of the industrial wastewater to be treated and on the other hand to Embrittlement of the elastic material of the membrane leads.
- the invention has set itself the task of overcoming the disadvantages of the prior art and to show a gassing device which is inexpensive and economical to manufacture, which significantly reduces or does not even allow the deposition of aggressive substances or microorganisms on their surface and in which Material properties of the membrane from the elastic material per se are retained.
- the gassing device according to the invention is characterized in that the elastic material of the membrane contains at least one oligodynamically acting material in an amount of 0.05 to 20% based on the total mass.
- the gassing device according to the invention is further characterized in that the elastic material of the membrane contains at least one oligodynamically active material in an amount of 0.05 to 20%, based on the total mass, in a spatially constant distribution over its entire cross section.
- the gassing device according to the invention is designed such that the elastic material of the membrane contains at least one oligodynamically active material in an amount of 0.05 to 20%, based on the total mass, which preferably concentrates in the area facing away from the introduction body is. It can thus advantageously be achieved that the surface of the elastic material of the membrane of the gassing device facing the industrial wastewater is designed in such a way that no chemically or biologically caused incrustations or growths can accumulate and form.
- the oligodynamically acting material of the gassing device according to the invention is a bactericidal and / or microbicidal metal component.
- the gassing device according to the invention has a significant bactericidal action against Pseudomonas aeruginosa, Staphylococcus aureus, Alcaligenes faecalis, Escherichia coli and Enterococcus faecalis. It was also found to be advantageous that the gassing device according to the invention has a significant fungicidal activity against Candida albicans.
- the metal component is a substance which releases metal ions and releases the metal ions through contact with the liquid, in particular the waste water.
- the metal ion-donating substance is a salt, oxide, carbide, an organometallic compound selected from the group consisting of silver, gold, copper, zinc, lead, arsenic and cadmium.
- the metal-releasing substance is selected from the group of zeolites, which are both naturally occurring and industrially produced zeolites.
- the gassing device is also distinguished according to the invention in that some of the metals contained in the zeolite are replaced by at least one type of ion-exchangeable metal which is selected from the group consisting of silver, gold, copper, zinc, lead, arsenic and cadmium.
- ion-exchangeable metal which is selected from the group consisting of silver, gold, copper, zinc, lead, arsenic and cadmium.
- active ingredients based on sodium aluminosilicates have distinguished themselves.
- a further advantage of the gassing device according to the invention is seen in that long-term operation in the sewage treatment plants is ensured, since the substance which releases metal ions and has an average grain size of about 6 ⁇ m can be incorporated into the elastic material of the membrane in such a way that both distribution A spatially uniform distribution over the entire cross section and also a distribution preferably in the region of the membrane facing away from the introduction body can be achieved. It has proven to be advantageous that in the gassing device according to the invention the elastic material of the membrane can be an ethylene-propylene-diene terpolymer as well as a silicone rubber and / or a polyurethane.
- the gassing device according to the invention can be tubular and / or plate-shaped and / or plate-shaped and / or dome-shaped, whereby in addition to the high and constant efficiency in the clarifier, the absolute tightness of the membrane, particularly in the area of the perforation, can be described as very advantageous, since none Deposits or incrustations can impair this sealing function.
- an elastic material of the membrane with at least one oligodynamically effective material in an amount of 0.05 to 20% based on the total mass in a gassing device for introducing a gas into a liquid, in particular air into waste water, with at least one inlet tion body and a membrane made of an elastic material, the membrane having openings for introducing the gas into the liquid, a significant extension of the system life in the sewage treatment plants can be realized by the constant elasticity of the membrane.
- the elastic material of the membrane in an amount of 0.05 to 20% based on the total mass of fungicides such as DCOIT (4,5-dichloro-2-N-octyl-4-isothiazoline -3-one dichloroctylisothiazolinone), OIT (2-N-octyl-4-isothiazolin-3-one), bethoxazine (3-benzo [b] thien -2-yl-5,6-dihydro-1,4.
- DCOIT 4,5-dichloro-2-N-octyl-4-isothiazoline -3-one dichloroctylisothiazolinone
- OIT 2-N-octyl-4-isothiazolin-3-one
- bethoxazine 3-benzo [b] thien -2-yl-5,6-dihydro-1,4.
- the gassing device has a membrane consisting of: 90 to 95% ethylene propylene diene terpolymer (EPDM) 2 to 5% aluminosilicate 0.5 to 5% DCOIT (4,5-dichloro-2-N-octyl-4 -isothiazolin-3-one dichloroctylisothiazolinone) and a tubular induction body made of polyethylene
- EPDM ethylene propylene diene terpolymer
- aluminosilicate 0.5 to 5%
- DCOIT 4,5-dichloro-2-N-octyl-4 -isothiazolin-3-one dichloroctylisothiazolinone
Landscapes
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Organic Chemistry (AREA)
- Biodiversity & Conservation Biology (AREA)
- Microbiology (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE2003150667 DE10350667A1 (en) | 2003-10-30 | 2003-10-30 | gassing |
PCT/EP2004/012126 WO2005042417A1 (en) | 2003-10-30 | 2004-10-27 | Gassing device |
Publications (1)
Publication Number | Publication Date |
---|---|
EP1680367A1 true EP1680367A1 (en) | 2006-07-19 |
Family
ID=34529911
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP04790903A Withdrawn EP1680367A1 (en) | 2003-10-30 | 2004-10-27 | Gassing device |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP1680367A1 (en) |
DE (1) | DE10350667A1 (en) |
WO (1) | WO2005042417A1 (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102005009783A1 (en) * | 2005-03-03 | 2006-09-14 | Wacker Chemie Ag | Crosslinkable compositions based on organosilicon compounds |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3224177A1 (en) * | 1982-06-29 | 1983-12-29 | Gummi-Jäger KG GmbH & Cie, 3000 Hannover | Aeration apparatus for water |
DE19736507A1 (en) * | 1997-08-22 | 1999-03-04 | Willuweit Thomas | Osmotic, effectively non-moving part dosing system, delivering fluid or gas over protracted interval |
DE19722781A1 (en) * | 1997-05-30 | 1998-12-03 | Ott Rita | Gassing unit for liquids, especially for aerating waste water |
US6543753B1 (en) * | 2001-10-12 | 2003-04-08 | Environmental Dynamics, Inc. | Air diffuser membrane treated with biocide |
ATE473201T1 (en) * | 2001-12-22 | 2010-07-15 | Contitech Vibration Control | SEWING PANEL MEMBRANE |
DE10235948A1 (en) * | 2002-08-06 | 2004-03-04 | Envicon Klärtechnik Verwaltungsgesellschaft mbH | Flow through hollow body |
-
2003
- 2003-10-30 DE DE2003150667 patent/DE10350667A1/en not_active Withdrawn
-
2004
- 2004-10-27 EP EP04790903A patent/EP1680367A1/en not_active Withdrawn
- 2004-10-27 WO PCT/EP2004/012126 patent/WO2005042417A1/en active Application Filing
Non-Patent Citations (1)
Title |
---|
See references of WO2005042417A1 * |
Also Published As
Publication number | Publication date |
---|---|
DE10350667A1 (en) | 2005-06-16 |
WO2005042417A1 (en) | 2005-05-12 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
17P | Request for examination filed |
Effective date: 20060524 |
|
AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LI LU MC NL PL PT RO SE SI SK TR |
|
AX | Request for extension of the european patent |
Extension state: HR |
|
RAX | Requested extension states of the european patent have changed |
Extension state: HR Payment date: 20060524 |
|
RIN1 | Information on inventor provided before grant (corrected) |
Inventor name: DER ANDERE ERFINDER HAT AUF SEINE NENNUNG VERZICHT Inventor name: KANIA, GUIDO |
|
RIN1 | Information on inventor provided before grant (corrected) |
Inventor name: DER ANDERE ERFINDER HAT AUF SEINE NENNUNG VERZICHT Inventor name: KANIA, GUIDO |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN |
|
18D | Application deemed to be withdrawn |
Effective date: 20100504 |