FR2748742A1 - Treatment plant for polluted liquids, e.g. urban waste water - Google Patents

Treatment plant for polluted liquids, e.g. urban waste water Download PDF

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Publication number
FR2748742A1
FR2748742A1 FR9606070A FR9606070A FR2748742A1 FR 2748742 A1 FR2748742 A1 FR 2748742A1 FR 9606070 A FR9606070 A FR 9606070A FR 9606070 A FR9606070 A FR 9606070A FR 2748742 A1 FR2748742 A1 FR 2748742A1
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FR
France
Prior art keywords
basin
zones
liquid
flow
station according
Prior art date
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Granted
Application number
FR9606070A
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French (fr)
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FR2748742B1 (en
Inventor
Jean Baptiste Bruno Bouthillon
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GTB BOUYER DUCHEMIN
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GTB BOUYER DUCHEMIN
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Priority to FR9606070A priority Critical patent/FR2748742B1/en
Publication of FR2748742A1 publication Critical patent/FR2748742A1/en
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    • 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
    • C02F3/1236—Particular type of activated sludge installations
    • C02F3/1242—Small compact installations for use in homes, apartment blocks, hotels or the like
    • C02F3/1247—Small compact installations for use in homes, apartment blocks, hotels or the like comprising circular tanks with elements, e.g. decanters, aeration basins, in the form of segments, crowns or sectors
    • 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
    • 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
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A20/00—Water conservation; Efficient water supply; Efficient water use
    • Y02A20/20—Controlling water pollution; Waste water treatment
    • Y02A20/208—Off-grid powered water 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

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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

Treatment plant consists of a large annular tank (8), e.g. 10-18 m in diameter and 5-8 m high, containing between 4000 and 18000 m<3> of liquid. The tank has \-2 aeration zones (9) which alternate with anoxia zones (10), with the aeration zones containing perforated aeration tubes (11) and supports (12). The supports are shaped to limit their disturbance to the flow of liquid in the tank, which is in one direction. The centre of the tank has an anaerobic compartment (13), with a trough (14) or overflow to carrying the liquid from it to the main annular tank. A similar system (15) removes the treated liquid from the tank.

Description

Station d'épuration de liquides pollués
et plus particulièrement bassin d'aération / anoxie
d'une telle station
Une station d'épuration de liquide pollués, par exemple d'effluents urbains comprend habltuellement un bassin d'anaérobie qui reçoit l'eau à traiter et dans lequel ce liquide stagne pendant un temps approprié avant de passer, par exemple, par un déversoir, dans un bassin d'aération-anoxie où il traverse successivement au moins une zone d'aération suivie d'au moins une zone d'anoxie, avant d'être évacuée du bassin.Wastewater treatment plant for polluted liquids
and more particularly aeration / anoxia basin
of such a station
A polluted liquid purification station, for example urban effluents, usually comprises an anaerobic basin which receives the water to be treated and in which this liquid stagnates for an appropriate time before passing, for example, through a weir, in an aeration-anoxia basin where it successively passes through at least one aeration zone followed by at least one anoxia zone, before being evacuated from the basin.

La figure 1 du dessin joint, montre un exemple de réalisation connu d'une station d'épuration dans laquelle le bassin d'aérobie/anoxie constitue un bassin annulaire (1) autour d'un bassin central (2) qui est un bassin d'anaérobie.Figure 1 of the accompanying drawing shows a known embodiment of a purification plant in which the aerobic / anoxia basin constitutes an annular basin (1) around a central basin (2) which is a basin of anaerobic.

Dans cette réalisation connue, le bassin annulaire est partagé par un voile annulaire (3) entre une zone d'aération (4) et une zone d'anoxie (5).In this known embodiment, the annular basin is shared by an annular veil (3) between an aeration zone (4) and an anoxia zone (5).

Des moyens appropriés font circuler le liquide pollué dans la zone d'aérobie puis dans la zone d'anoxie. il s'opère une Inversion du sens giratoire du flux, ce dernier étant alors guidé par des portions de voiles courbes (6) et (7) comme on le voit sur la figure.Appropriate means circulate the polluted liquid in the aerobic zone then in the anoxia zone. there is a Reversal of the roundabout direction of the flow, the latter then being guided by portions of curved sails (6) and (7) as seen in the figure.

La présente invention vise à simplifier le bassin annulaire d'aérobie/anoxie et elle s'applique en particulier à un bassin de grand diamètre, soit typiquement une largeur de 10 à 18 mètres pour une hauteur de liquide de 5 à 8 mètres, le volume du bassin étant dans une gamme de 4.000 à 18.000 m3.The present invention aims to simplify the annular aerobic / anoxic basin and it applies in particular to a large diameter basin, typically a width of 10 to 18 meters for a liquid height of 5 to 8 meters, the volume of the basin being in a range of 4,000 to 18,000 m3.

Selon l'invention, le bassin d'aérobie/anoxie, qui comprend au moins une zone d'aérobie et au moins une zone successive d'anoxie, et des moyens pour introduire le liquide à traiter dans le bassin, créer un flux de liquide pour lui faire parcourir successivement lesdites zones et extraire le liquide du bassin, est caractérisé en ce que lesdites zones sont disposées en sorte que le sens giratoire du flux soit le même dans les différentes zones.According to the invention, the aerobic / anoxia basin, which comprises at least one aerobic zone and at least one successive anoxia zone, and means for introducing the liquid to be treated into the basin, creating a flow of liquid in order to make it pass through said zones successively and extract the liquid from the basin, is characterized in that said zones are arranged so that the roundabout direction of the flow is the same in the different zones.

On décrira ci-après, en référence aux figures 2 à 4 du dessin Joint, un exemple de réalisation d'un bassin et d'une station d'épuration conformes à la présente information.With reference to FIGS. 2 to 4 of the attached drawing, an example of an embodiment of a basin and a treatment plant in accordance with this information will be described below.

Sur les figures - la figure 1 est un schéma en vue de dessus d'une station d'épuration telle que définie dans le préambule; - la figure 2 est un schéma en vue de dessus d'une station d'épuration selon la présente invention - la figure 3 est une coupe verticale selon le plan B-B de la figure 2, et - la figure 4 est une coupe verticale selon le plan A-A de la figure 2.In the figures - Figure 1 is a top view diagram of a wastewater treatment plant as defined in the preamble; - Figure 2 is a top view diagram of a wastewater treatment plant according to the present invention - Figure 3 is a vertical section along the plane BB of Figure 2, and - Figure 4 is a vertical section according to plane AA of figure 2.

On n'a représenté sur les figures que les éléments utiles pour la compréhension de la présente invention et en faisant abstraction des éléments utilisés pour créer le flux d'eau dans le bassin d'aérobie/anoxie, ces éléments étant connus en soi. Habituellement, le flux est créé par un système de pales perpendiculaires au flux, dans les zones d'anoxie.Only the elements useful for understanding the present invention and ignoring the elements used to create the flow of water in the aerobic / anoxic tank have been shown in the figures, these elements being known per se. Usually, the flow is created by a system of blades perpendicular to the flow, in areas of anoxia.

Le bassin d'aérobie/anoxie représenté sur la figure 2 est un bassin annulaire (8) qui selon l'invention comprend des zones d'aération (9) alternant avec des zones d'anoxie (10) en suivant le tour du bassin.The aerobic / anoxia basin shown in FIG. 2 is an annular basin (8) which according to the invention comprises aeration zones (9) alternating with anoxia zones (10) following the circumference of the basin.

Dans l'exemple représenté, il y a deux zones d'aération (9) alternant avec deux zones d'anoxie (10). In the example shown, there are two ventilation zones (9) alternating with two anoxia zones (10).

Dans les zones d'aération, le bassin comporte des moyens d'aération constitués, de façon soit connue par des rampes (11) alimentées en air et qui délivrent l'air par des orifices appropriés.In the aeration zones, the basin comprises aeration means constituted, in a known manner by ramps (11) supplied with air and which deliver the air through appropriate orifices.

Il est inutile de décrire en détail le principe de la rampe, qui est connu de l'homme du métier.It is unnecessary to describe in detail the principle of the ramp, which is known to those skilled in the art.

Selon l'invention, des poteaux (12) sont disposés dans les zones d'aération à des endroits appropriés pour servir de guidage aux rampes d'aération et faciliter leur mise en place. Le guidage s'effectue par exemple dans des glissières métalliques incluses dans le poteau lors du coulage du béton ou rapportées ultérieurement sur le poteau.According to the invention, posts (12) are arranged in the ventilation zones at suitable locations to serve as a guide for the ventilation ramps and to facilitate their installation. The guidance is carried out for example in metal slides included in the post during the pouring of concrete or subsequently added to the post.

Dans cette fonction, les poteaux remplacent le voile intermédiaire (3) qui, dans la réalisation connue servait au guidage et à la mise en place des rampes d'aération.In this function, the posts replace the intermediate web (3) which, in the known embodiment, was used for guiding and installing the aeration ramps.

Les poteaux sont normalement réalisés en béton et ont de préférence une forme oblongue dans le sens du flux de l'effluent pour limiter les perturbations à l'écoulement de l'eau.The posts are normally made of concrete and preferably have an oblong shape in the direction of the flow of the effluent to limit disturbances to the flow of water.

Avantageusement, un même poteau peut servir au guidage et à la mise en place des deux rampes.Advantageously, the same post can be used for guiding and positioning the two ramps.

Au centre du bassin annulaire est disposé un bassin d'anaérobie (13), comme dans la réalisation connue. Ce bassin reçoit l'affluent à traiter par le dessus ou par le dessous. Des goulottes ou un déversoir (14) permettent à l'eau de ce bassin de passer dans le bassin annulaire. Des moyens similaires (15) permettent l'évacuation de l'eau du bassin annulaire. Ces moyens ont été schématisés par des flèches sur la figure 2 où la situation de ces moyens ne constitue qu'un exemple non limitatif.In the center of the annular basin is arranged an anaerobic basin (13), as in the known embodiment. This basin receives the tributary to be treated from above or below. Chutes or a weir (14) allow the water from this basin to pass into the annular basin. Similar means (15) allow the water to be evacuated from the annular basin. These means have been shown diagrammatically by arrows in FIG. 2 where the situation of these means constitutes only a non-limiting example.

On ne décrira pas plus en détails les moyens utillsés pour faire passer l'eau du bassin central au bassin annulaire, ni les moyens qui font circuler l'eau du bassin annulaire, ni les moyens utilisés pour extraire l'eau du bassin annulaire. car l'invention ne porte pas sur ces moyens qui sont bien connus de l'homme du métier.We will not describe in more detail the means used to pass the water from the central basin to the annular basin, nor the means which circulate the water from the annular basin, nor the means used to extract water from the annular basin. because the invention does not relate to these means which are well known to those skilled in the art.

L'invention s'applique avantageusement à des bassins de grande capacité capables de traiter des effluents urbains à boues activées faible charge avec au minimum le traitement de l'azote et de capacité supérieure ou égale à 40.000 équivalent habitants.The invention advantageously applies to large-capacity basins capable of treating urban effluents with low-load activated sludge with at least the treatment of nitrogen and with a capacity greater than or equal to 40,000 equivalent inhabitants.

Outre l'économie de matière sur les quantités de béton, de coffrage et d'acier à mettre en oeuvre, l'invention diminue aussi les pertes de vitesse du flux, du fait qu'il n'y en a plus sur une cloison séparative et lors des demi-tours ; la consommation d'énergie pour la circulation de l'effluent dans le bassin d'aéroble/anoxie est donc diminuée.In addition to the material savings on the quantities of concrete, formwork and steel to be used, the invention also reduces the flow speed losses, because there is no longer any on a separating wall. and during U-turns; the energy consumption for the circulation of the effluent in the aeroble / anoxia basin is therefore reduced.

L'invention n'est pas limitée à la réalisation décrite. The invention is not limited to the embodiment described.

Claims (7)

REVENDICATIONS 1. Station d'épuration de liquide pollué qui comprend un bassin annulaire (8) déterminant au moins une zone d'aération (9) suivie d'une zone d'anoxie (10), et des moyens pour introduire le liquide à traiter dans le bassin, créer un flux de liquide pour lui faire parcourir successivement lesdites zones et extraire le liquide du bassin, caractérisée en ce que lesdites zones sont disposées en sorte que le sens giratoire du flux soit le même dans les différentes zones.1. Polluted liquid purification station which comprises an annular basin (8) determining at least one aeration zone (9) followed by an anoxia zone (10), and means for introducing the liquid to be treated in the basin, creating a flow of liquid to make it pass successively through said zones and extract the liquid from the basin, characterized in that said zones are arranged so that the gyratory direction of the flow is the same in the different zones. 2. Station selon la revendication 1 dans laquelle le bassin comprend deux zones d'aération (9,9) alternant avec deux zones d'anoxie (10,10). 2. Station according to claim 1 wherein the basin comprises two aeration zones (9,9) alternating with two anoxia zones (10,10). 3. Station selon la revendication 1 ou 2, dans laquelle lesdites zones (9,10 9,10) sont disposées en alternance sur un tour du bassin.3. Station according to claim 1 or 2, wherein said zones (9,10 9,10) are arranged alternately on a turn of the basin. 4. Station selon l'une des revendications 1 à 3, dans laquelle la ou les zones d'aération comportent des rampes d'aération (11) et des poteaux (12) pour guider la mise en place de ces rampes.4. Station according to one of claims 1 to 3, wherein the ventilation zone or zones comprise ventilation ramps (11) and posts (12) to guide the installation of these ramps. 5. Station selon la revendication 4, dans laquelle un poteau (12) assure le guidage de deux rampes (11).5. Station according to claim 4, wherein a post (12) provides guidance for two ramps (11). 6. Station selon la revendication 4 ou 5, dans laquelle les poteaux (12) sont profilés dans le sens du flux du liquide pour limiter la perturbation du flux.6. Station according to claim 4 or 5, wherein the posts (12) are profiled in the direction of the flow of the liquid to limit the disturbance of the flow. 7. Station selon l'une des revendications précédentes, dans laquelle ledit bassin annulaire (8) entoure un bassin central d'anaérobie (13). 7. Station according to one of the preceding claims, wherein said annular basin (8) surrounds a central anaerobic basin (13).
FR9606070A 1996-05-15 1996-05-15 PURIFICATION STATION FOR POLLUTED LIQUIDS AND MORE PARTICULARLY AERATION / ANOXIS BASIN OF SUCH A STATION Expired - Fee Related FR2748742B1 (en)

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FR9606070A FR2748742B1 (en) 1996-05-15 1996-05-15 PURIFICATION STATION FOR POLLUTED LIQUIDS AND MORE PARTICULARLY AERATION / ANOXIS BASIN OF SUCH A STATION

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FR2748742B1 FR2748742B1 (en) 1998-08-14

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2837813A1 (en) * 2002-03-29 2003-10-03 Omnium Traitement Valorisa CIRCULAR PLANT FOR THE BIOLOGICAL TREATMENT OF WASTEWATER
ES2379934A1 (en) * 2009-03-20 2012-05-07 Estela Potente Sancho Sequential nutrient depuration system with telematic control. (Machine-translation by Google Translate, not legally binding)
CN108585187A (en) * 2018-07-12 2018-09-28 重庆交通大学 Rural area family sewage-treatment plant and method

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2909723A1 (en) * 1979-03-13 1980-09-18 Steinmann & Ittig Gmbh U Co Kg Sewage denitrification system - with nitrification and denitrification sectors at opposite ends of common circular basin
DE3235992A1 (en) * 1982-09-29 1984-03-29 Grimm, Willi J., 7090 Ellwangen Apparatus for the biological purification and denitrification of effluent
EP0458760A1 (en) * 1990-05-18 1991-11-27 FOSFLEX s.r.l. A process and plant for the biological purification of sewage
WO1995007861A1 (en) * 1993-09-13 1995-03-23 Karsten Krogh Andersen Purification plant for removing of nutrients from sewage

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2909723A1 (en) * 1979-03-13 1980-09-18 Steinmann & Ittig Gmbh U Co Kg Sewage denitrification system - with nitrification and denitrification sectors at opposite ends of common circular basin
DE3235992A1 (en) * 1982-09-29 1984-03-29 Grimm, Willi J., 7090 Ellwangen Apparatus for the biological purification and denitrification of effluent
EP0458760A1 (en) * 1990-05-18 1991-11-27 FOSFLEX s.r.l. A process and plant for the biological purification of sewage
WO1995007861A1 (en) * 1993-09-13 1995-03-23 Karsten Krogh Andersen Purification plant for removing of nutrients from sewage

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2837813A1 (en) * 2002-03-29 2003-10-03 Omnium Traitement Valorisa CIRCULAR PLANT FOR THE BIOLOGICAL TREATMENT OF WASTEWATER
WO2003082752A1 (en) * 2002-03-29 2003-10-09 Otv S.A. Circular installation for the biological treatment of wastewater.
AU2003239657B2 (en) * 2002-03-29 2008-01-03 Veolia Water Solutions & Technologies Support Circular installation for the biological treatment of wastewater
ES2379934A1 (en) * 2009-03-20 2012-05-07 Estela Potente Sancho Sequential nutrient depuration system with telematic control. (Machine-translation by Google Translate, not legally binding)
CN108585187A (en) * 2018-07-12 2018-09-28 重庆交通大学 Rural area family sewage-treatment plant and method

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