WO2002102720A1 - Dispositif de purification des eaux usees pour bassin de clarification - Google Patents

Dispositif de purification des eaux usees pour bassin de clarification Download PDF

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Publication number
WO2002102720A1
WO2002102720A1 PCT/DE2002/001316 DE0201316W WO02102720A1 WO 2002102720 A1 WO2002102720 A1 WO 2002102720A1 DE 0201316 W DE0201316 W DE 0201316W WO 02102720 A1 WO02102720 A1 WO 02102720A1
Authority
WO
WIPO (PCT)
Prior art keywords
coating
waste water
base body
water purification
covering
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.)
Ceased
Application number
PCT/DE2002/001316
Other languages
German (de)
English (en)
Inventor
Wilfried Ott
Hans-Christian Von Consbruch
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.)
OTT GmbH
Original Assignee
OTT 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 OTT GmbH filed Critical OTT GmbH
Publication of WO2002102720A1 publication Critical patent/WO2002102720A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

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
    • B01F23/2312—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
    • B01F23/23124—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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2201/00—Details relating to filtering apparatus
    • B01D2201/18—Filters characterised by the openings or pores
    • B01D2201/184—Special form, dimension of the openings, pores of the filtering elements
    • 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 wastewater treatment device for a clarifier according to the preamble of claim 1.
  • Clarifiers are known which have a gassing device near their base, via which air is introduced into the wastewater in order to enable aerobic degradation processes of the waste materials present in the wastewater.
  • the air must be introduced as far as possible so that the gas bubbles do not pass undissolved through the liquid and escape on the surface. Adequate aeration of the activated sludge in the wastewater is a prerequisite for the aerobic degradation of the waste materials.
  • DE 195 16 395 A1 discloses a device for aerating waste water in a clarifier, in which at least two plate-shaped air distributors are arranged below a liquid level.
  • the basic body of such an air distributor is a hollow body made of metal which has gas outlet openings in its upper side and is covered by a porous film which covers the gas outlet openings.
  • the film consists of a polypropylene which is used for drainage in concrete buildings.
  • the air distributors are provided with connections for optional connection to a gas source or a liquid container, the air distributors also have the function of introducing them from Lu t to the clarifier the function of a filter for • separating the waste water from the activated sludge.
  • a part of the air distributors arranged in the clarifier are used as a gassing device and another part as a separating device, whereby the assignment can change.
  • Reason for an intermittent. Operation is the treatment concept in sewage treatment plants for some types of waste water. It is based on the fact that the ability of bacteria, primarily aerobes, to breathe organic substances, ie to convert them into low-molecular compounds, ultimately into carbon dioxide, water, nitrates and sulfates. A prerequisite for this in the aerobically operating system is adequate aeration of the activated sludge in the wastewater. Subsequently, the aeration is suspended and the biological wastewater treatment with anaerobes, ie bacteria that live on chemically bound oxygen and thus reduce it reductively, becomes more important. However, biological wastewater treatment with anaerobes cannot be carried out completely if, after switching off the air supply, the wastewater is continuously removed from the clarifier via the air distributor provided with the porous polypropylene film.
  • the invention is therefore based on the object of specifying a generic wastewater purification device for clarifiers, which works with improved efficiency.
  • the cover which is provided with a large number of passage openings, is made of an elastic material, surprisingly prevents wastewater from penetrating into the base body when the air supply is switched off.
  • the cover made of elastic material stands out from the base body and is stretched. This also widens the through openings in the coating and the air flows into the waste water in fine gas bubbles.
  • Such an elastic coating pressed into the openings of the base body acts like a membrane and has an extraordinary filter performance.
  • the through-openings clog less quickly, which results in a high time saving for the separation of the cleaned wastewater from the activated sludge and the removal of the cleaned wastewater for further use.
  • the treatment of the wastewater and the separation of the activated sludge from the completely clarified wastewater can thus be carried out in the same pool in a shorter time.
  • the activated sludge advantageously remains in the clarifier and is available for further wastewater treatment in full.
  • the activated sludge is concentrated as a result of several treatment processes and from a certain concentration onwards can be removed from the clarifier for further use.
  • the base body has a tubular shape with a grooved area on the surface and the grooved area is covered by the coating.
  • a base body designed in this way can be arranged particularly effectively in the clarifier, the tubular shape and thus the large surface area of the base body making efficient ventilation and / or filter performance possible.
  • Air can easily be supplied via the grooves for aeration of the wastewater, but also the cleaned wastewater can be removed.
  • the elastic coating is preferably pressed into the grooves by means of negative pressure, and the clarified water is sucked into the grooves through the passage openings of the coating.
  • the passage openings are designed as perforation slots and are arranged in the area of the covering that covers the grooved area of the base body.
  • the fact is taken advantage of that the perforation slots narrow when the cleaned wastewater is discharged, in particular when a negative pressure is set, and thus have an increased filter performance.
  • the perforation slots are arranged at least at the locations of the cover covering the grooves in a base body with cover that can be used both as a gassing device and as a separating device.
  • the perforation slots are preferably arranged outside the locations of the cover covering the grooves.
  • the perforation slots are preferably arranged only at the points of the cover covering the grooves, as a result of which the cleaned waste water is intended to enter the grooves leading away from the cleaned waste water directly.
  • an advantageous embodiment of the invention provides that the grooves are designed as ring grooves and the base body has a longitudinal groove in a region lying at the bottom, based on the installation position, which is in flow connection with the ring grooves arranged in the base body.
  • the longitudinal groove serves as the main flow for discharging the cleaned wastewater and for supplying the air required for aeration of the wastewater.
  • a further development provides that the covering covering the ring grooves only on the - in relation to the installation position of the Basic body - lateral areas has perforation slots, which ensures unimpeded, trouble-free discharge of the clarified waste water via the longitudinal groove.
  • the perforation slots can be blown free of filter residues by a gas supplied via the grooves.
  • base bodies which can be used both as a gassing device and as a separating device, they are arranged near the bottom of the clarifier.
  • Fig. 1 shows a longitudinal section through part of the separation device according to the invention during a filtering process
  • Fig. 2 shows a longitudinal section through part of the separation device according to the invention during a blow-off process.
  • the separating device consists of a base body 12 and an elastic covering 14 surrounding it.
  • the covering 14 has areas with perforation slots 20 for filtering the cleaned waste water, as well as annular grooves 16 and a longitudinal groove 18 for discharging the cleaned waste water.
  • the coating 14 is pressed into the grooves 16, 18, in particular when a negative pressure is set.
  • the cleaned waste water located in the clarifier passes through the perforation slots 20 arranged in the coating 14 and enters the annular groove 16.
  • the activated sludge is retained on the coating.
  • the cleaned waste water now flows further into the longitudinal groove 18, from where it is discharged from the clarifier for further use.
  • the direction of flow of the treated wastewater is shown by arrows. ,
  • a gas preferably air
  • the gas is supplied to the base body 12 under pressure via the longitudinal groove 18.
  • the gas is distributed in the annular grooves 16 connected to the longitudinal groove 18 and causes the coating 14 to expand over the annular grooves 16 and to lift off slightly from the base body 12.
  • the gas flows out through the perforation slots 20, the Loosen onsschlitzen 20 fixed deposits and deposits.
  • the direction of flow of the supplied gases is shown by arrows.
  • the Perforati onsschlitze 20 enlarge during the blowing process.

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)
  • Aeration Devices For Treatment Of Activated Polluted Sludge (AREA)

Abstract

La présente invention concerne un dispositif de purification des eaux usées destiné à un bassin de clarification, comprenant un dispositif d'apport de gaz servant à introduire un gaz dans un liquide, en particulier à introduire de l'air dans des eaux usées, et un dispositif de séparation servant à séparer et à dévier le liquide clarifié, le dispositif d'apport de gaz et le dispositif de séparation comprenant tous deux des corps de base rigides (12) qui portent respectivement une gaine (14) de matière élastique dotée d'une pluralité d'ouvertures de passage (20).
PCT/DE2002/001316 2001-06-15 2002-04-10 Dispositif de purification des eaux usees pour bassin de clarification Ceased WO2002102720A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10128914.6 2001-06-15
DE10128914 2001-06-15

Publications (1)

Publication Number Publication Date
WO2002102720A1 true WO2002102720A1 (fr) 2002-12-27

Family

ID=7688299

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DE2002/001316 Ceased WO2002102720A1 (fr) 2001-06-15 2002-04-10 Dispositif de purification des eaux usees pour bassin de clarification

Country Status (1)

Country Link
WO (1) WO2002102720A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11007493B2 (en) * 2016-07-18 2021-05-18 Alexander Ott Gassing device

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4060486A (en) * 1975-03-26 1977-11-29 August Schreiber Waste water aeration device
WO1992000798A1 (fr) * 1990-07-13 1992-01-23 Lanmark Consultants Limited Ameliorations relatives a la regulation d'ecoulement
DE19516395A1 (de) * 1995-05-04 1996-11-07 Werkstoff & Funktion Grimmel W Vorrichtung zum Begasen einer Flüssigkeit und Verfahren zum Betrieb einer Kläranlage
EP1129768A2 (fr) * 2000-02-23 2001-09-05 Ott GmbH Dispositif d'aération

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4060486A (en) * 1975-03-26 1977-11-29 August Schreiber Waste water aeration device
WO1992000798A1 (fr) * 1990-07-13 1992-01-23 Lanmark Consultants Limited Ameliorations relatives a la regulation d'ecoulement
DE19516395A1 (de) * 1995-05-04 1996-11-07 Werkstoff & Funktion Grimmel W Vorrichtung zum Begasen einer Flüssigkeit und Verfahren zum Betrieb einer Kläranlage
EP1129768A2 (fr) * 2000-02-23 2001-09-05 Ott GmbH Dispositif d'aération

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11007493B2 (en) * 2016-07-18 2021-05-18 Alexander Ott Gassing device

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