WO2003099731A1 - Procede, dispositif et unite de separation pour l'epuration biologique d'eaux residuaires - Google Patents

Procede, dispositif et unite de separation pour l'epuration biologique d'eaux residuaires Download PDF

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Publication number
WO2003099731A1
WO2003099731A1 PCT/DE2002/001904 DE0201904W WO03099731A1 WO 2003099731 A1 WO2003099731 A1 WO 2003099731A1 DE 0201904 W DE0201904 W DE 0201904W WO 03099731 A1 WO03099731 A1 WO 03099731A1
Authority
WO
WIPO (PCT)
Prior art keywords
tank
channel
area
adjacent
wastewater
Prior art date
Application number
PCT/DE2002/001904
Other languages
German (de)
English (en)
Inventor
Martin Marggraff
Original Assignee
Munters Euroform 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 Munters Euroform Gmbh filed Critical Munters Euroform Gmbh
Priority to DE10297774T priority Critical patent/DE10297774D2/de
Priority to AU2002311003A priority patent/AU2002311003A1/en
Priority to PCT/DE2002/001904 priority patent/WO2003099731A1/fr
Publication of WO2003099731A1 publication Critical patent/WO2003099731A1/fr

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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
    • C02F3/02—Aerobic processes
    • C02F3/12—Activated sludge processes
    • 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 present invention relates to a method for biological wastewater treatment, in which the wastewater in a activated sludge tank is aerated and activated sludge is separated off via at least one inclined lamella pack in the activated sludge tank, and the cleaned waste water is led out of the activated sludge tank.
  • the invention further relates to a device for performing such a method and a separation device for use in such a device.
  • aeration tanks are known in which the aeration area and the separation area are spatially separated from one another, so that the aeration process and the separation process take place at different points in the activation tank.
  • Aeration tanks are also known in which the aeration and separation processes take place in different operating phases, ie simultaneous aeration and sludge separation are not possible.
  • a method for biological wastewater treatment in which in a ventilated activated sludge the biomass or bacterial content in the activated sludge tank is arranged by slanting lamella packs, which are arranged at the end of the flow path of the activated sludge tank at a distance from the latter before the discharge are increased or the activated sludge is thickened.
  • ventilation is provided directly in front of or on the plate pack, and the air released is directed into the individual spaces between the plates.
  • the present invention has for its object to provide a method, a device and a separation device of the type specified, with which a particularly high quality wastewater treatment can be achieved with high performance.
  • This object is achieved according to the invention in a method of the type mentioned at the outset in that the at least one inclined lamella packet is ventilated from below, in an upflow channel adjacent to the upper lamella ends, an upward flow is generated by the rising air and in an outflow channel adjacent to a downward flow is brought about at the lower ends of the lamellae, with sludge sedimented on the lamellae.
  • a targeted upward flow and a targeted downward flow on both sides of the lamella package are thus generated by the ventilation provided below the inclined lamella package, which leads to a desired activated sludge circulation.
  • the upward flow in the upflow channel does not influence the sedimentation process within the interstices between the lamellae, while the targeted vertical downward flow in the outflow channel takes the sedimented activated sludge with it and carries it into the area of the activation tank, in which no separation device is provided.
  • the inclined plate package has a much larger width than the adjacent outflow channel. If the area below the plate pack is designated with "and the area of the outflow channel" B ⁇ , the area “A * is significantly larger than the area” B ⁇ . As a result, significantly more rising air is collected in area “A” and thereby generated a relatively strong upward flow and directed into the upflow channel.
  • the water body transported upwards by the flow can only flow down again through the significantly smaller area “B N (outflow channel) and on the one hand enter the fins or on the other hand exit from the separating device. In area “B (outflow channel), there is therefore no upward flow due to the calming flow conditions below it, but this concentrates on the upflow channel assigned to area" A *. In area “B ⁇ there is only a downward flow, which carries the sedimented activated sludge downwards for mixing with the rest of the activated sludge.
  • the aeration carried out during the separation process thus acts in such a way that a special flow guidance results in the basin, which increases the function of the aeration basin or enables a particularly good quality wastewater treatment.
  • the upward flow generated can therefore be regulated via the ventilation intensity and in particular briefly increased for "flushing purposes".
  • cleaned waste water is preferably discharged upward adjacent to the upper lamella ends, specifically in one from the upflow channel separate way.
  • the cleaned wastewater can then be collected at the upper end of the separation device and led out of the aeration tank via one or more drain lines.
  • additional measures can be taken so that the rising air in the lower area of the separating device only penetrates into the upflow channel and not into the outflow channel (area “B ⁇ ).
  • area “B ⁇ ) For example, in a special embodiment of the method according to the invention, penetration of the air from below into the outflow channel is prevented by deflection devices. This can involve additional baffles or a longer design of the lowest lamella level, so that the area “B ⁇ is additionally shielded.
  • part of the upward flow is passed through the discharge area for cleaned waste water for flushing purposes.
  • the discharge area for the cleaned wastewater can be cleaned in a simple manner.
  • the upward flow is preferably passed through the discharge area periodically.
  • the discharge area for purified waste water is expediently essentially closed at the top.
  • a roof-shaped closure is preferably used, the area of the “roof ridge” expediently remaining open.
  • sludge and gas or air bubbles or purging air can escape from the system or back into the system Aeration tanks are returned. If necessary, a separate floating sludge drain is also possible.
  • the outflow channel (area “B ⁇ ) is temporarily closed in a targeted manner at the top. This is preferably done with strong ventilation so that air can enter this area and flow through the fins, whereby the fins can be cleaned. By slowly lowering the closure, the slat level can be cleaned according to the slat level.
  • the method according to the invention can be used both for partial flows and for the total flow in the activation tank. It goes without saying that the separating device is preferably located immediately before the activation tank expires.
  • the above-mentioned object is also achieved by a device for performing the method described above.
  • the device comprises an aeration basin, a separation device in the form of at least one inclined lamella pack, a ventilation device and a discharge device for the cleaned wastewater and is characterized in that the aeration device is arranged below the inclined lamella pack and adjacent to the upper fin ends of the Package an upflow channel and an outflow channel is arranged adjacent to the lower fin ends.
  • This arrangement causes that of the ventilation device, preferably a pressure ventilation with the pool floor attached ventilation elements (pipes, hoses, plates or injectors), discharged and upward flowing air hits the inclined underside of the inclined lamella pack and is guided by it into the adjacent upflow channel. This creates an upward flow through the upflow channel.
  • the water body transported upward by the flow can only flow down again through the outflow channel, carrying the activated sludge deposited on the lamella downwards for mixing with the remaining activated sludge.
  • the upflow channel is arranged adjacent to the upper fin ends of the inclined fin package and is delimited on the one hand by an end wall of the fin package at the upper fin ends.
  • the other boundary wall can be formed by a boundary wall of the aeration tank, a diving wall, a boundary wall of an adjacent inclined lamella pack, etc.
  • the outflow channel is arranged adjacent to the lower lamella ends of the inclined lamella package and is delimited at least on one side by the lamellae which run obliquely upwards with the open lamella spaces.
  • a boundary wall of any kind can be provided. If several inclined lamella packs are arranged next to one another, the outflow channel is preferably inclined on both sides of the slats running upwards bounded by the open spaces.
  • the cleaned wastewater is preferably collected in a collecting shaft arranged adjacent to the upper fin ends.
  • This collecting duct preferably forms the boundary of the inflow channel.
  • In the collecting shaft there is preferably at least one discharge pipe leading upwards for purified waste water, which is expediently perforated.
  • the cleaned waste water is led upwards out of the separating device via this at least one discharge pipe, preferably into a horizontal drain line which can be connected to the separating device in particular with a simple coupling. In this way, the separation device can be uncoupled at any time and lifted out of the activation tank, for example, for basic cleaning.
  • one or more openings leading into the aeration tank are provided in the collecting shaft, through which a part of the upward flow can be passed through the collecting shaft. This allows the collecting shaft to be flushed in a simple manner. These openings can either be constantly open or can be opened and closed in a controlled manner.
  • the collecting shaft is closed at the top in a roof shape, the area of the “ridge” preferably remaining open.
  • sludge and gas or air bubbles or purging air can escape from the system or be returned to the activation tank.
  • a separate floating sludge drain is also possible.
  • the outflow channel is shielded from rising air bubbles in the lower end region.
  • These measures can also be taken to prevent rising air from entering the outflow channel.
  • the shielding can be realized in that a special baffle is provided for this purpose, which diverts the rising air flow to the upflow channel.
  • Another solution is that the lowest slat level is made a little longer, so that the outflow channel is also shielded. Other configurations are also possible.
  • a particularly preferred embodiment of the invention provides that a plurality of inclined lamella packs are arranged side by side in a roof shape.
  • the following arrangement is therefore preferably provided in this direction in the inflow direction of the activation tank: collecting shaft, first inclined lamella packet with slats inclined downwards, outflow duct, second inclined lamella packet with slats rising upwards, collecting shaft, inflow channel, collecting shaft , third inclined plate package with slats inclined downwards, outflow channel, fourth inclined plate package with slats rising upwards, collecting duct, inflow channel, pool wall.
  • the separating device consisting of one inclined plate pack or several inclined plate packs is arranged transversely to the inflow direction of the activated sludge tank before it expires.
  • the separator can be used for partial flows as well as for the total flow of the aeration tank.
  • Several separation devices can also be arranged in the aeration tank.
  • a separating device for use in a device of the type described above, which has one or more inclined plate packs.
  • This separating device can be hung, for example, in the aeration tank, but also on stands on its bottom. By separating the drain line, the separating device can easily be removed from the basin again.
  • the aeration device which can be of a known type, is preferably also releasably attached to the bottom of the aeration tank, so that simple replacement, simple maintenance, etc. is possible.
  • Figure 1 shows a longitudinal section through an aeration tank with built-in separator
  • Figure 2 is a plan view of the aeration tank of the Figure 1;
  • Figure 3 is a view of the separation device in the direction of arrows A - A in Figure 1 / and
  • Figure 4 is a view of detail D in Figure 1 on an enlarged scale.
  • FIG. 1 shows a longitudinal section through an aeration tank 1, the inflow direction of the tank being shown by the arrow at the top left and running from left to right in the figure.
  • the wastewater level in the pool is indicated at 2.
  • Such aeration tanks are known, so that details thereof need no longer be discussed. Only the details essential to the invention are described below.
  • a separation device 3 for separating the activated sludge from the waste water is shown in the drainage area of the activation tank 1.
  • This separating device 3 comprises four inclined lamella packs 4 arranged next to one another, which are arranged roof-shaped transversely to the inflow direction of the aeration basin, ie in such a way that two adjacent inclined lamella packs 4 each have downwardly directed slats, the lamellae of the two packets are inclined opposite to each other.
  • Such sloping plate packs are known as such, so that known designs can be used when designing the packs.
  • On the bottom of the aeration tank 1 there is an aeration device 10, which is a compressed air aeration that works with plate aerators.
  • Other embodiments of ventilation devices are also suitable.
  • the aeration device 10 extends essentially over the entire length of the aeration tank, in particular over the area below the separating device 3.
  • the aeration device releases air bubbles 11 which rise upwards in the aeration tank.
  • the ventilation of such revitalization purposes is known as such and therefore need not be discussed in detail.
  • the purpose of the aeration is to supply the microorganisms in the aeration tank with oxygen and in this way to increase the cleaning performance of the tank.
  • the wastewater flowing upward in the channels 7 follows the arrows shown in FIG. 1 and flows down again via the outflow channels 8. Part of the water and the activated sludge enter the fins from these outflow channels. This is where the actual separation of water and sludge takes place. The sludge slides down on the fins back into the outflow channels and is discharged there by the downward flow.
  • Waste water flows upwards to the upper fin end and enters a collecting shaft 5 there.
  • Each inclined plate pack has a vertical collecting shaft 5 adjacent to the upper ends of the individual plates, which extends over the width of the plate pack.
  • the cleaned wastewater collects in this collecting shaft and is led upwards out of the basin via three discharge pipes 6 arranged at a distance from one another in the collecting shaft 5.
  • Figure 2 shows a top view of the arrangement of the collecting shafts 5 and exhaust pipes 6. Die Extraction pipes open at their upper ends in three horizontally running drain lines 9, with which the cleaned waste water is discharged from the activation tank.
  • Figure 2 shows the aeration tank of Figure 1 in plan view, but not to scale. The direction of inflow is indicated by an arrow in FIG.
  • FIG. 3 shows a view in the direction of the arrows A - A in FIG. 1.
  • This view shows the inclined plate pack 4 arranged leftmost in FIG. 1 with the individual plates and the collecting duct 5 arranged in front of it, as well as an exhaust pipe 6 arranged in the collecting duct a drain line 9 opens.
  • rinsing openings 13 are provided which lead into the aeration tank and through which part of the upward flow can be passed through the collecting shaft in order to clean or flush it in a simple manner.
  • the collecting shaft 5 is closed in a roof-like manner, as shown at 14, the area of the “roof ridge” remaining open.
  • the aeration tank can also be equipped with an agitator for additional horizontal mixing.

Landscapes

  • 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)
  • Activated Sludge Processes (AREA)

Abstract

L'invention concerne un procédé pour l'épuration biologique d'eaux résiduaires, un dispositif pour la mise en oeuvre dudit procédé, et une unité de séparation pour l'utilisation dudit dispositif. Ledit procédé consiste à aérer les eaux résiduaires se trouvant dans un bassin à boues activées (1) et à séparer les boues activées par l'intermédiaire d'au moins un empilement de lames inclinées (4) se trouvant dans le bassin à boues activées, puis à évacuer les eaux résiduaires épurées du bassin à boues activées. L'empilement ou les empilements de lames inclinées (4) est(sont) aéré(s) par le bas de sorte qu'un courant ascendant soit produit par l'air ascendant dans un canal à courant ascendant (7), situé à proximité des extrémités supérieures des lames, tandis qu'un courant descendant, entraînant les sédiments de boues déposés sur les lames, est produit dans un canal à courant descendant (8), situé à proximité des extrémités inférieures des lames. Le guidage particulier de ces courants permet de faire circuler les boues activées dans le bassin et d'améliorer ainsi le rendement d'épuration dudit bassin.
PCT/DE2002/001904 2002-05-24 2002-05-24 Procede, dispositif et unite de separation pour l'epuration biologique d'eaux residuaires WO2003099731A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
DE10297774T DE10297774D2 (de) 2002-05-24 2002-05-24 Verfahren, Vorrichtung und Trenneinrichtung zur biologischen Abwasserreinigung
AU2002311003A AU2002311003A1 (en) 2002-05-24 2002-05-24 Method, apparatus, and separation device for biological wastewater purification
PCT/DE2002/001904 WO2003099731A1 (fr) 2002-05-24 2002-05-24 Procede, dispositif et unite de separation pour l'epuration biologique d'eaux residuaires

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/DE2002/001904 WO2003099731A1 (fr) 2002-05-24 2002-05-24 Procede, dispositif et unite de separation pour l'epuration biologique d'eaux residuaires

Publications (1)

Publication Number Publication Date
WO2003099731A1 true WO2003099731A1 (fr) 2003-12-04

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Application Number Title Priority Date Filing Date
PCT/DE2002/001904 WO2003099731A1 (fr) 2002-05-24 2002-05-24 Procede, dispositif et unite de separation pour l'epuration biologique d'eaux residuaires

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AU (1) AU2002311003A1 (fr)
DE (1) DE10297774D2 (fr)
WO (1) WO2003099731A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009081118A1 (fr) 2007-12-20 2009-07-02 The Queen's University Of Belfast Améliorations apportées au traitement de l'eau

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4100983A1 (de) * 1991-01-15 1992-07-16 Borsig Babcock Ag Vorrichtung zur biologischen reinigung von abwasser
DE4329239A1 (de) * 1993-08-26 1995-03-02 Ivan Prof Dr Ing Sekoulov Verfahren und Vorrichtung zur biologischen Abwasserreinigung
WO2001064590A1 (fr) * 2000-03-02 2001-09-07 Waterleau, Global Water Technology Nv Procede et systeme de traitement durable d'eaux usees municipales et industrielles

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4100983A1 (de) * 1991-01-15 1992-07-16 Borsig Babcock Ag Vorrichtung zur biologischen reinigung von abwasser
DE4329239A1 (de) * 1993-08-26 1995-03-02 Ivan Prof Dr Ing Sekoulov Verfahren und Vorrichtung zur biologischen Abwasserreinigung
WO2001064590A1 (fr) * 2000-03-02 2001-09-07 Waterleau, Global Water Technology Nv Procede et systeme de traitement durable d'eaux usees municipales et industrielles

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009081118A1 (fr) 2007-12-20 2009-07-02 The Queen's University Of Belfast Améliorations apportées au traitement de l'eau
CN101896434B (zh) * 2007-12-20 2013-03-20 贝尔法斯特女王大学 涉及水处理的改进方法
US8883009B2 (en) 2007-12-20 2014-11-11 The Queen's University Of Belfast Water treatment

Also Published As

Publication number Publication date
DE10297774D2 (de) 2005-04-21
AU2002311003A1 (en) 2003-12-12

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