EP1226096A1 - Method and device for biologically purifying waste water - Google Patents

Method and device for biologically purifying waste water

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Publication number
EP1226096A1
EP1226096A1 EP00956279A EP00956279A EP1226096A1 EP 1226096 A1 EP1226096 A1 EP 1226096A1 EP 00956279 A EP00956279 A EP 00956279A EP 00956279 A EP00956279 A EP 00956279A EP 1226096 A1 EP1226096 A1 EP 1226096A1
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EP
European Patent Office
Prior art keywords
basin
nitrification
tank
biomass
denitrification
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Withdrawn
Application number
EP00956279A
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German (de)
French (fr)
Inventor
Holger Hasselbusch
Berthold Mueller
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.)
Messer Griesheim GmbH
Original Assignee
Messer Griesheim 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 Messer Griesheim GmbH filed Critical Messer Griesheim GmbH
Publication of EP1226096A1 publication Critical patent/EP1226096A1/en
Withdrawn legal-status Critical Current

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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
    • C02F3/30—Aerobic and anaerobic processes
    • C02F3/302—Nitrification and denitrification treatment
    • 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
    • C02F3/30—Aerobic and anaerobic processes
    • C02F3/301—Aerobic and anaerobic treatment in the same reactor

Definitions

  • the invention relates to a method and a device for biological wastewater purification, in which the wastewater to be treated is fed to a activated sludge tank, in which sludge water tanks are breathed out of a biomass, in particular bacteria, in the sludge / wastewater mixture with the exclusion of air or oxygen, and in the subsequent step the wastewater mixture and excess sludge are fed to a nitrification tank and then fed to a settling tank in which
  • Sedimentation basin the biomass is separated from the water by sedimentation and returned to the denitrification basin.
  • the invention has for its object to overcome the disadvantages of the prior art and to provide a method and an apparatus in which the nitrogen can be safely removed with a relatively low technical effort and thus at relatively low cost.
  • the object underlying the invention is achieved by a method according to the preamble of claim 1, which is characterized in that the proportion of biomass in the denitrification basin is increased by obliquely arranged lamellae which are arranged in the denitrification basin before the outflow to the nitrification basin that a dry matter content of 4 to 12 g / l is set in the denitrification tank.
  • a part of the existing pool volume is separated and provided with lamella separators in order to increase the proportion of the biomass in the denitrification zone without stressing the subsequent parts of the plant. This corresponds in effect to an increase in the pelvic volume and thus an improvement in denitrification without expanding the pelvis itself in volume. Therefore, the object of the invention is also used in particular to expand existing plants for biological wastewater treatment, in which spatial expansion is not possible due to local conditions, and to increase their efficiency.
  • the proportion of biomass in the nitrification basin is increased by slats which are arranged at an incline and are arranged in the nitrification basin before the outlet to the settling basin, and a dry substance content of 4 to 12 g / l is set in the nitrification basin.
  • oxygen, air or nitrogen enriched with oxygen is fed to the denitrification basin in the region of the fins.
  • pure here means a technical purity, which means a purity of 70 to 99% by volume.
  • a partial flow of the biomass separated in the sedimentation basin is returned to the nitrification basin.
  • the object underlying the invention is further achieved by a device according to the preamble of claim 6, which is characterized in that lamellae are arranged before the drain from the denitrification tank to the nitrification tank, and that the lamellae rise obliquely in the direction of the drain to the nitrification tank.
  • the device according to the invention has the advantage that such an increase in efficiency with technically relatively simple means and at relatively low Cost is possible. In addition, it is not necessary to increase the volume of the pelvis.
  • lamellae are arranged before the nitrification basin runs off to the sedimentation basin and the slats rise obliquely in the direction of the drainage to the sedimentation basin.
  • the lamellae are arranged over the entire width in the denitrification basin and serve as a partition to the adjoining basin in order to adjust the volume of the basin.
  • the method and the device according to the invention are preferably used for the biological wastewater treatment of wastewater from industry or municipalities.
  • Fig. 1 shows an embodiment of the device according to the invention with lamellae in the denitrification tank.
  • Fig. 2 shows an embodiment of the device according to the invention with lamellae in the denitrification basin and in the nitrification basin.
  • FIG 3 shows an embodiment of the device according to the invention with lamellae in the denitrification tank and in the nitrification tank with additional recycling of the biomass separated in the sedimentation tank into the nitrification tank.
  • the sludge / wastewater mixture from the activation tank is fed to the denitrification tank 2 via an inlet 1.
  • a lamella separator 5 is arranged in front of the outlet 3 of the denitrification tank 2 into the nitrification tank 4.
  • the Lamellar separator 5 has slat packs 6 which run at an incline and is preferably arranged at the end of the flow path of the denitrification basin over its entire width and height before the outlet 3.
  • One or more perforated hoses can advantageously be arranged directly in front of or on the lamella separator 5 for aeration of the sludge / waste water mixture (not shown in FIG. 1).
  • Sedimentation basin 8 The cleaned waste water leaves the sedimentation basin 8 via the outlet 9 and the biomass is returned to the inlet 1 through a line 10. Sludge is returned internally from the nitrification basin 4 into the denitrification basin 2 through a line 11.
  • the device shown in FIG. 2 corresponds to the device shown in FIG. 1, a second lamella separator 12 with obliquely arranged lamella packets 16 being additionally arranged in the nitrification tank 4.
  • the device shown in FIG. 3 shows an embodiment which is expanded compared to the device according to FIG. 2 with an additional return 14 of the sludge from the settling tank 8 into the nitrification tank 4.

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  • 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)
  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Purification Treatments By Anaerobic Or Anaerobic And Aerobic Bacteria Or Animals (AREA)

Abstract

The invention relates to a method for biologically purifying waste water during which the waste water to be purified is fed to an aeration tank in which water-quality constituents of a biomass, especially bacteria, are made to respire in the sludge-waste water mixture without the presence of air or oxygen. Afterwards, the waste water mixture and excess sludge are fed to a nitrification tank (4) and are subsequently fed to a settling tank (8). In the settling tank, the biomass is separated from the water by sedimentation and is returned to the denitrification tank. The inventive method is characterized in that the proportion of the biomass in the denitrification tank is increased by diagonally arranged lamellae (5, 6), which are placed in the denitrification tank (2) before draining the nitrification tank (4), and in that a dry substance content ranging from 4 to 12 g/l is set in the denitrification tank.

Description

Verfahren und Vorrichtung zur biologischen Abwasserreinigung Method and device for biological wastewater treatment
Die Erfindung betrifft ein Verfahren sowie eine Vorrichtung zur biologischen Abwasserreinigung, bei dem das zu reinigende Abwasser einem Belebungsbecken zugeführt wird, in welchem Belebungsbecken unter Luft - bzw. Sauerstoffausschluß Wasserinhaltsstoffe von einer Biomasse, insbesondere Bakterien, im Schlamm - Abwassergemisch veratmet werden und bei dem anschließend das Abwassergemisch und Überschußschlamm einem Nitrifikationsbecken zugeführt werden und anschließend einem Absetzbecken zugeführt werden, in welchemThe invention relates to a method and a device for biological wastewater purification, in which the wastewater to be treated is fed to a activated sludge tank, in which sludge water tanks are breathed out of a biomass, in particular bacteria, in the sludge / wastewater mixture with the exclusion of air or oxygen, and in the subsequent step the wastewater mixture and excess sludge are fed to a nitrification tank and then fed to a settling tank in which
Absetzbecken die Biomasse vom Wasser durch Sedimentation getrennt wird und in das Denitrifikationsbecken zurückgeführt wird.Sedimentation basin, the biomass is separated from the water by sedimentation and returned to the denitrification basin.
Die bekannten Verfahren und Vorrichtungen zur biologischen Abwasserreinigung sind oft nicht in der Lage, die erforderliche Entfernung des Stickstoffes imThe known methods and devices for biological wastewater treatment are often unable to remove the required nitrogen in the
Denitrifikationsbecken sicher zu realisieren. Daher ist oftmals ein teurer Ausbau zur Schaffung von zusätzlichen Beckenvolumen für die Nitrifikations- und Denitrifikationsstufe notwendig. Darüber hinaus ist eine Vergrößerung der Beckenvolumina auch nicht immer möglich, denn beispielsweise kann durch örtliche Gegebenheiten eine vorhandene Kläranlage nicht erweitert werden.To realize denitrification basins safely. Therefore, expensive expansion is often necessary to create additional pool volumes for the nitrification and denitrification stages. In addition, it is not always possible to increase the tank volume, for example, due to local conditions, an existing wastewater treatment plant cannot be expanded.
Der Erfindung liegt die Aufgabe zugrunde, die Nachteile des Standes der Technik zu überwinden und ein Verfahren sowie eine Vorrichtung zu schaffen, bei dem der Stickstoff sicher entfernt werden kann mit einem relativ geringen technischen Aufwand und damit zu relativ geringen Kosten.The invention has for its object to overcome the disadvantages of the prior art and to provide a method and an apparatus in which the nitrogen can be safely removed with a relatively low technical effort and thus at relatively low cost.
Die der Erfindung zugrunde liegende Aufgabe wird durch ein Verfahren gemäß dem Oberbegriff des Anspruchs 1 gelöst, das dadurch gekennzeichnet ist, daß der Anteil der Biomasse im Denitrifikationsbecken durch schräg verlaufend angeordnete Lamellen, die im Denitrifikationsbecken vor dem Ablauf zum Nitrifikationsbecken angeordnet sind, erhöht wird und daß im Denitrifikationsbecken ein Trockensubstanzgehalt von 4 bis 12 g/l eingestellt wird. Durch das erfindungsgemäße Verfahren wird ein Teil des vorhandenen Beckenvolumens abgetrennt und mit Lamellenabscheidern versehen, um den Anteil der Biomasse in der Zone der Denitrifikation zu erhöhen, ohne die nachfolgenden Anlagenteile zu belasten. Dies entspricht in der Wirkung einer Vergrößerung des Beckenvolumens und damit einer Verbesserung der Denitrifikation, ohne die Becken selbst im Volumen zu erweitern. Daher dient der Gegenstand der Erfindung insbesondere auch dazu, bereits vorhandene Anlagen zur biologischen Abwasserreinigung, bei denen eine räumliche Ausdehnung aufgrund örtlicher Gegebenheiten nicht möglich ist, zu erweitern und deren Effizienz zu steigern.The object underlying the invention is achieved by a method according to the preamble of claim 1, which is characterized in that the proportion of biomass in the denitrification basin is increased by obliquely arranged lamellae which are arranged in the denitrification basin before the outflow to the nitrification basin that a dry matter content of 4 to 12 g / l is set in the denitrification tank. By means of the method according to the invention, a part of the existing pool volume is separated and provided with lamella separators in order to increase the proportion of the biomass in the denitrification zone without stressing the subsequent parts of the plant. This corresponds in effect to an increase in the pelvic volume and thus an improvement in denitrification without expanding the pelvis itself in volume. Therefore, the object of the invention is also used in particular to expand existing plants for biological wastewater treatment, in which spatial expansion is not possible due to local conditions, and to increase their efficiency.
Erfindungsgemäß wird der Anteil der Biomasse im Nitrifikationsbecken durch schräg ansteigend angeordnete Lamellen, die im Nitrifikationsbecken vor dem Ablauf zum Absetzbecken angeordnet sind, erhöht und im Nitrifikationsbecken wird ein Trockensubstanzgehalt von 4 bis 12 g/l eingestellt.According to the invention, the proportion of biomass in the nitrification basin is increased by slats which are arranged at an incline and are arranged in the nitrification basin before the outlet to the settling basin, and a dry substance content of 4 to 12 g / l is set in the nitrification basin.
Es ist erfindungsgemäß vorgesehen, daß dem Denitrifikationsbecken Sauerstoff, mit Sauerstoff angereicherte Luft oder Stickstoff, vorzugsweise reiner Sauerstoff oder reiner Stickstoff, im Bereich der Lamellen zugeführt wird. Mit dem Begriff "rein" ist hier eine technische Reinheit, daß bedeutet eine Reinheit von 70 bis 99 Vol. -% gemeint.It is provided according to the invention that oxygen, air or nitrogen enriched with oxygen, preferably pure oxygen or pure nitrogen, is fed to the denitrification basin in the region of the fins. The term "pure" here means a technical purity, which means a purity of 70 to 99% by volume.
Nach der Erfindung wird ein Teilstrom der im Absetzbecken abgetrennten Biomasse in das Nitrifikationsbecken zurückgeführt.According to the invention, a partial flow of the biomass separated in the sedimentation basin is returned to the nitrification basin.
Die der Erfindung zugrunde liegende Aufgabe wird ferner durch eine Vorrichtung gemäß dem Oberbegriff des Anspruchs 6 gelöst, welche dadurch gekennzeichnet ist, daß Lamellen vor dem Ablauf vom Denitrifikationsbecken zum Nitrifikationsbecken angeordnet sind, und daß die Lamellen in Richtung des Ablaufs zum Nitrifikationsbecken schräg ansteigen.The object underlying the invention is further achieved by a device according to the preamble of claim 6, which is characterized in that lamellae are arranged before the drain from the denitrification tank to the nitrification tank, and that the lamellae rise obliquely in the direction of the drain to the nitrification tank.
Die erfindungsgemäße Vorrichtung weist den Vorteil auf, daß so eine Effizienzsteigerung mit technisch relativ einfachen Mitteln und zu relativ geringen Kosten möglich ist. Zudem ist eine Volumenvergrößerung des Beckens nicht erforderlich.The device according to the invention has the advantage that such an increase in efficiency with technically relatively simple means and at relatively low Cost is possible. In addition, it is not necessary to increase the volume of the pelvis.
Nach der Erfindung sind Lamellen vor dem Ablauf des Nitrifikationsbeckens zum Absetzbecken angeordnet und die Lamellen steigen schräg in Richtung des Ablaufs zum Absetzbeckens an.According to the invention, lamellae are arranged before the nitrification basin runs off to the sedimentation basin and the slats rise obliquely in the direction of the drainage to the sedimentation basin.
Erfindungsgemäß ist es vorgesehen, daß die Lamellen auf der gesamten Breite in dem Denitrifikationsbecken angeordnet sind und als Trennwand zu dem anschließenden Becken dienen, um das Volumen der Becken einzustellen.According to the invention, it is provided that the lamellae are arranged over the entire width in the denitrification basin and serve as a partition to the adjoining basin in order to adjust the volume of the basin.
Das erfindungsgemäße Verfahren und die Vorrichtung wird vorzugsweise verwendet für die biologische Abwasserreinigung von Abwässern aus der Industrie oder Kommune.The method and the device according to the invention are preferably used for the biological wastewater treatment of wastewater from industry or municipalities.
Die erfindungsgemäße Vorrichtung sowie das Verfahren werden nun anhand von Abbildungen (Fig. 1 bis Fig.3) beispielhaft näher erläutert.The device according to the invention and the method are now explained in more detail by way of example using figures (FIGS. 1 to 3).
Die Fig. 1 zeigt ein Ausführungsbeispiel der Vorrichtung gemäß der Erfindung mit Lamellen im Denitrifikationsbecken.Fig. 1 shows an embodiment of the device according to the invention with lamellae in the denitrification tank.
Die Fig. 2 zeigt ein Ausführungsbeispiel der Vorrichtung gemäß der Erfindung mit Lamellen im Denitrifikationsbecken und im Nitrifikationsbecken.Fig. 2 shows an embodiment of the device according to the invention with lamellae in the denitrification basin and in the nitrification basin.
Die Fig. 3 zeigt ein Ausführungsbeispiel der Vorrichtung gemäß der Erfindung mit Lamellen im Denitrifikationsbecken und im Nitrifikationsbecken mit zusätzlicher Rückführung der im Absetzbecken abgetrennen Biomasse in das Nitrifikationsbecken.3 shows an embodiment of the device according to the invention with lamellae in the denitrification tank and in the nitrification tank with additional recycling of the biomass separated in the sedimentation tank into the nitrification tank.
Bei der in Fig. 1 dargestellten Vorrichtung wird das Schlamm - Abwassergemisch aus dem Belebungsbecken über einen Zulauf 1 dem Denitrifikationsbecken 2 zugeführt. Vor dem Ablauf 3 des Denitrifikationsbeckens 2 in das Nitrifikationsbecken 4 ist ein Lamellenabscheider 5 angeordnet. Der Lamellenabscheider 5 weist schräg ansteigend verlaufende Lamellenpakete 6 auf und ist vorzugsweise am Strömungswegende des Denitrifikationsbeckens über dessen gesamte Breite und Höhe vor dem Ablauf 3 angeordnet. Vorteilhaft können ein oder mehrere perforierte Schläuche unmittelbar vor oder am Lamellenabscheider 5 zur Belüftung des Schlamm - Abwassergemisches angeordnet sein (in Fig. 1 nicht dargestellt). Um die Biomasse bzw. den Bakterienanteil zu erhöhen und im Belebungsbecken einen bestimmten Trockensubstanzgehalt zwischen 4 bis 12 g/l gezielt einzustellen, wird eine entsprechende Sauerstoffmenge durch diese perforierten Schläuche dem Schlamm - Abwassergemisch zugeführt. Aus dem Nitrifikationsbecken 4 gelangt das Gemisch durch den Überlauf 7 in dasIn the device shown in FIG. 1, the sludge / wastewater mixture from the activation tank is fed to the denitrification tank 2 via an inlet 1. A lamella separator 5 is arranged in front of the outlet 3 of the denitrification tank 2 into the nitrification tank 4. The Lamellar separator 5 has slat packs 6 which run at an incline and is preferably arranged at the end of the flow path of the denitrification basin over its entire width and height before the outlet 3. One or more perforated hoses can advantageously be arranged directly in front of or on the lamella separator 5 for aeration of the sludge / waste water mixture (not shown in FIG. 1). In order to increase the biomass or the bacterial content and to set a specific dry matter content between 4 to 12 g / l in the aeration tank, a corresponding amount of oxygen is fed through the perforated hoses to the sludge / wastewater mixture. The mixture passes from the nitrification basin 4 through the overflow 7 into the
Absetzbecken 8. Das gereinigte Abwasser verläßt das Absetzbecken 8 über den Ablauf 9 und die Biomasse wird durch eine Leitung 10 in den Zulauf 1 zurückgeführt. Durch eine Leitung 11 wird Schlamm aus dem Nitrifikationsbecken 4 in das Denitrifikationsbecken 2 intern zurückgeführt. Die in der Fig. 2 dargestellte Vorrichtung entspricht der in Fig. 1 gezeigten Vorrichtung, wobei zusätzlich ein zweiter Lamellenabscheider 12 mit schräg angeordneten Lamellenpaketen 16 im Nitrifikationsbecken 4 angeordnet ist.Sedimentation basin 8. The cleaned waste water leaves the sedimentation basin 8 via the outlet 9 and the biomass is returned to the inlet 1 through a line 10. Sludge is returned internally from the nitrification basin 4 into the denitrification basin 2 through a line 11. The device shown in FIG. 2 corresponds to the device shown in FIG. 1, a second lamella separator 12 with obliquely arranged lamella packets 16 being additionally arranged in the nitrification tank 4.
Die in der Fig. 3 dargestellte Vorrichtung zeigt eine gegenüber der Vorrichtung nach Fig. 2 erweiterte Ausführungsform mit einem zusätzlichen Rücklauf 14 des Schlammes aus dem Absetzbecken 8 in das Nitrifikationsbecken 4. The device shown in FIG. 3 shows an embodiment which is expanded compared to the device according to FIG. 2 with an additional return 14 of the sludge from the settling tank 8 into the nitrification tank 4.

Claims

Patentansprüche claims
1. Verfahren zur biologischen Abwasserreinigung, bei dem das zu reinigende Abwasser einem Belebungsbecken zugeführt wird, in welchem Belebungsbecken unter Luft - bzw. Sauerstoffausschluß Wasserinhaltsstoffe von einer Biomasse, insbesondere Bakterien, im Schlamm-Abwassergemisch veratmet werden und bei dem anschließend das Abwassergemisch und Überschußschlamm einem Nitrifikationsbecken zugeführt werden und anschließend einem Absetzbecken zugeführt werden, in welchem Absetzbecken die Biomasse vom Wasser durch Sedimentation getrennt wird und in das Dentrifikationsbecken zurückgeführt wird, dadurch gekennzeichnet, daß der Anteil der Biomasse im Denitrifikationsbecken durch schräg verlaufend angeordnete Lamellen, die im Denitrifikationsbecken vor dem Ablauf zum Nitrifikationsbecken angeordnet sind, erhöht wird und daß im1. A method for biological wastewater purification, in which the wastewater to be treated is fed to a activated sludge tank, in which sludge tank, with the exclusion of air or oxygen, water constituents from a biomass, in particular bacteria, are breathed in the sludge / waste water mixture and in which the waste water mixture and excess sludge subsequently become one Nitrification basins are fed and then fed to a settling basin, in which settling basin the biomass is separated from the water by sedimentation and is returned to the dentrification basin, characterized in that the proportion of the biomass in the denitrification basin is arranged by obliquely arranged lamellae, which are in the denitrification basin before the outflow are arranged to the nitrification basin, is increased and that in
Denitrifikationsbecken ein Trockensubstanzgehalt von 4 bis 12 g/l eingestellt wird.Denitrification basin a dry matter content of 4 to 12 g / l is set.
2. Verfahren nach Anspruch 1 , dadurch gekennzeichnet, daß der Anteil der Biomasse im Nitrifikationsbecken durch schräg ansteigend angeordnete Lamellen, die im Nitrifikationsbecken vor dem Ablauf zum Absetzbecken angeordnet sind, erhöht wird und daß im Nitrifikationsbecken ein Trockensubstanzgehalt von 4 bis 12 g/l eingestellt.2. The method according to claim 1, characterized in that the proportion of biomass in the nitrification basin is increased by sloping slats arranged in the nitrification basin before the discharge to the settling basin, and that a dry matter content of 4 to 12 g / l is set in the nitrification basin ,
3. Verfahren nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß dem Denitrifikationsbecken Sauerstoff, mit Sauerstoff angereicherte Luft oder Stickstoff im Bereich der Lamellen zugeführt wird.3. The method according to claim 1 or 2, characterized in that the denitrification tank oxygen, oxygen-enriched air or nitrogen is supplied in the region of the fins.
4. Verfahren nach Anspruch 3, dadurch gekennzeichnet, daß reiner Sauerstoff oder reiner Stickstoff zugeführt wird.4. The method according to claim 3, characterized in that pure oxygen or pure nitrogen is supplied.
5. Verfahren nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß ein Teilstrom der im Absetzbecken abgetrennten 5. The method according to any one of claims 1 to 4, characterized in that a partial stream of those separated in the settling tank
6. Biomasse in das Nitrifikationsbecken zurückgeführt wird.6. Biomass is returned to the nitrification basin.
7. Vorrichtung zur biologischen Abwasserreinigung, welche ein Belebungsbecken aufweist, in dem unter Luft - bzw. Sauerstoffausschluß Wasserinhaltsstoffe von einer Biomasse, insbesondere Bakterien, im Schlamm - Abwassergemisch veratmet werden, welche ein daran anschließendes Nitrifikationsbecken aufweist, dem das Abwassergemisch und der Überschußschlamm aus dem Belebungsbecken zugeführt werden, und welche ein daran anschließendes Absetzbecken aufweist, in dem die Biomassse vom Wasser durch7. Device for biological wastewater treatment, which has an activated sludge tank in which, with the exclusion of air or oxygen, water substances from a biomass, in particular bacteria, are breathed in the sludge / wastewater mixture, which has an adjoining nitrification tank, which contains the waste water mixture and the excess sludge from the Aeration tanks are supplied, and which has an adjoining sedimentation tank in which the biomass flows from the water
Sedimentation getrennt wird, dadurch gekennzeichnet, daß Lamellen vor dem Ablauf vom Denitrifikationsbecken zum Nitrifikationsbecken angeordnet sind, und daß die Lamellen in Richtung des Ablaufs zum Nitrifikationsbecken schräg ansteigen.Sedimentation is separated, characterized in that lamellae are arranged before the discharge from the denitrification basin to the nitrification basin, and that the lamellae rise obliquely in the direction of the outlet to the nitrification basin.
8. Vorrichtung nach Anspruch 6, dadurch gekennzeichnet, daß Lamellen vor dem Ablauf des Nitrifikationsbeckens zum Absetzbecken angeordnet sind, und daß die Lamellen schräg in Richtung des Ablaufs zum8. The device according to claim 6, characterized in that fins are arranged before the discharge of the nitrification basin to the settling tank, and that the fins obliquely in the direction of the process for
Absetzbeckens ansteigen.Sedimentation basin rise.
9. Vorrichtung nach Anspruch 6 oder 7 , dadurch gekennzeichnet, daß die Lamellen auf der gesamten Breite in dem Denitrifikationsbecken und/oder Nitrifikationsbecken angeordnet sind und als Trennwand zu dem anschließenden Becken dienen, um das Volumen der Becken einzustellen.9. Apparatus according to claim 6 or 7, characterized in that the slats are arranged over the entire width in the denitrification basin and / or nitrification basin and serve as a partition to the adjacent basin to adjust the volume of the basin.
10. Verwendung eines Verfahrens nach einem der Ansprüche 1 bis 5 oder einer Vorrichtung nach einem der Ansprüche 6 bis 8 für die biologische10. Use of a method according to one of claims 1 to 5 or a device according to one of claims 6 to 8 for the biological
Abwasserreinigung von Abwässern aus der Industrie oder Kommune Wastewater treatment of industrial or municipal wastewater
EP00956279A 1999-08-11 2000-07-26 Method and device for biologically purifying waste water Withdrawn EP1226096A1 (en)

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DE1999138016 DE19938016A1 (en) 1999-08-11 1999-08-11 Method and device for biological wastewater treatment
DE19938016 1999-08-11
PCT/EP2000/007133 WO2001012563A1 (en) 1999-08-11 2000-07-26 Method and device for biologically purifying waste water

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