EP1694418A1 - Procede de melange et de separation subsequente d'un fluide multiphase, et installation pour la mise en oeuvre de ce procede - Google Patents

Procede de melange et de separation subsequente d'un fluide multiphase, et installation pour la mise en oeuvre de ce procede

Info

Publication number
EP1694418A1
EP1694418A1 EP04803854A EP04803854A EP1694418A1 EP 1694418 A1 EP1694418 A1 EP 1694418A1 EP 04803854 A EP04803854 A EP 04803854A EP 04803854 A EP04803854 A EP 04803854A EP 1694418 A1 EP1694418 A1 EP 1694418A1
Authority
EP
European Patent Office
Prior art keywords
inlet
volume flow
settling
basin
flow
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Withdrawn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
EP04803854A
Other languages
German (de)
English (en)
Inventor
Martin Armbruster
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.)
hydrograv GmbH
Original Assignee
hydrograv 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 hydrograv GmbH filed Critical hydrograv GmbH
Publication of EP1694418A1 publication Critical patent/EP1694418A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D21/00—Separation of suspended solid particles from liquids by sedimentation
    • B01D21/24—Feed or discharge mechanisms for settling tanks
    • B01D21/2405—Feed mechanisms for settling tanks
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D17/00—Separation of liquids, not provided for elsewhere, e.g. by thermal diffusion
    • B01D17/02—Separation of non-miscible liquids
    • B01D17/0205—Separation of non-miscible liquids by gas bubbles or moving solids
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D17/00—Separation of liquids, not provided for elsewhere, e.g. by thermal diffusion
    • B01D17/02—Separation of non-miscible liquids
    • B01D17/0208—Separation of non-miscible liquids by sedimentation
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D17/00—Separation of liquids, not provided for elsewhere, e.g. by thermal diffusion
    • B01D17/02—Separation of non-miscible liquids
    • B01D17/0208—Separation of non-miscible liquids by sedimentation
    • B01D17/0211—Separation of non-miscible liquids by sedimentation with baffles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D17/00—Separation of liquids, not provided for elsewhere, e.g. by thermal diffusion
    • B01D17/02—Separation of non-miscible liquids
    • B01D17/0208—Separation of non-miscible liquids by sedimentation
    • B01D17/0214—Separation of non-miscible liquids by sedimentation with removal of one of the phases
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D21/00—Separation of suspended solid particles from liquids by sedimentation
    • B01D21/0039—Settling tanks provided with contact surfaces, e.g. baffles, particles
    • B01D21/0042—Baffles or guide plates
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D21/00—Separation of suspended solid particles from liquids by sedimentation
    • B01D21/02—Settling tanks with single outlets for the separated liquid
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D21/00—Separation of suspended solid particles from liquids by sedimentation
    • B01D21/24—Feed or discharge mechanisms for settling tanks
    • B01D21/2427—The feed or discharge opening located at a distant position from the side walls
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D21/00—Separation of suspended solid particles from liquids by sedimentation
    • B01D21/24—Feed or discharge mechanisms for settling tanks
    • B01D21/2433—Discharge mechanisms for floating particles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D21/00—Separation of suspended solid particles from liquids by sedimentation
    • B01D21/24—Feed or discharge mechanisms for settling tanks
    • B01D21/2444—Discharge mechanisms for the classified liquid
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D21/00—Separation of suspended solid particles from liquids by sedimentation
    • B01D21/24—Feed or discharge mechanisms for settling tanks
    • B01D21/245—Discharge mechanisms for the sediments
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D21/00—Separation of suspended solid particles from liquids by sedimentation
    • B01D21/24—Feed or discharge mechanisms for settling tanks
    • B01D21/2488—Feed or discharge mechanisms for settling tanks bringing about a partial recirculation of the liquid, e.g. for introducing chemical aids
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D21/00—Separation of suspended solid particles from liquids by sedimentation
    • B01D21/30—Control equipment
    • B01D21/34—Controlling the feed distribution; Controlling the liquid level ; Control of process parameters
    • 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
    • C02F1/008—Control or steering systems not provided for elsewhere in subclass C02F
    • 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
    • C02F2001/007—Processes including a sedimentation step
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2209/00—Controlling or monitoring parameters in water treatment
    • C02F2209/42—Liquid level

Definitions

  • the invention relates to a method for mixing a multi-phase fluid in at least one flow reactor, subsequent separation of phases of different weights in at least one sedimentation tank and extensive recycling of at least one of the separated phases into the mixture reactor.
  • the invention further relates to a plant for carrying out the method in which an at least two-phase mixture is mixed in the mixing reactor, subsequently the phase mixture flows via a feed line or directly from the mixing reactor through a flow-through inlet area to a basin, which is used at least temporarily as a settling basin and from which at least part of a phase of the mixture separated in the settling tank is returned via a return line or in turn directly from the settling tank to the mixing reactor.
  • this invention relates to methods and systems in which so-called settling tanks with predominantly horizontal flow are used, for which it is known that high-level inlets to such tanks in the prior art lead to poor cleaning performance. Definitions for when settling basins are considered to be predominantly horizontal can be found in the relevant design rules.
  • the primary task of the aeration tanks which can consist of one or more chambers, as mixing reactors is to mix the biodegradable dirt load of the wastewater with dirt-decomposing bacteria in the activated sludge and by optimizing their environmental conditions, e.g. with regard to the oxygen content in the water to favorably influence the biochemical degradation process.
  • a volume flow flows from the aeration tank to the secondary settling tank as a settling tank.
  • the time-variable inflow of fluid volume per unit of time that flows into the settling tank gives its current external hydraulic load.
  • the secondary clarifier has three main tasks. First, they separate the activated sludge from the cleaned wastewater and thus enable the thickened sludge to be returned to the activation tank via the sludge return. Secondly, in periods of higher inflow to the sewage treatment plant, for example in rainy weather, its volume serves as storage for activated sludge, which is then transferred from the activation tank to the secondary settling tank due to the increased hydraulic load on the plant and the resulting increased mass transport Period of lower inflow with reduced hydraulic load to be shifted back into the aeration tanks.
  • the relocate of activated sludge from the activated sludge tank to the secondary settling tank in the event of higher hydraulic loads results in two serious disadvantages for the success of the process in the Teclinik stand.
  • the activated sludge tanks have the least amount of degrading bacteria available during the period of the highest exposure to biodegradable dirt due to the displacement of the activated sludge.
  • the efficiency of the biological degradation of wastewater treatment is therefore reduced at the highest pollution load.
  • the secondary settling tanks with a large and expensive storage volume have to be built.
  • the published patent application EP 1 354 614 AI discloses a technical solution with which the amount of sludge in the secondary clarifier can be checked or minimized for all loads with an adaptive inlet.
  • the inlet area of the inlet structure to the secondary settling basin is optimized in different ways depending on the existing load situation so that the lowest possible energy at the inlet surface is given for each situation. This is the case if the one hand, the vertical distance of the lead-in area is small for the separation mirror and on the other hand the lead-in area has an optimum for the current load situation height hi n.
  • the technical solution for the adaptive reduction of excess energy thus makes it possible to maximize the efficiency of sedimentation tanks for all load situations by minimizing the internal pool load.
  • a higher efficiency of the secondary clarifier with the same external load is synonymous with a lower amount of sludge in the tank and thus also with a lower separating mirror.
  • an adaptive inlet structure is now operated in such a way that it does not maximize the efficiency of the secondary clarification tank for all external load intensities, but only for maximum external pool loads, while it sets a deteriorated efficiency with lower external loads, it can be ensured that the amount of sludge in the event of Dry weather exposure due to fluid mechanical phenomena is increased compared to a possible optimum thus the separating level is also set higher than under ideal conditions, while the amount of sludge in the sedimentation tank is optimized in the event of the highest loads, i.e. is as small as possible.
  • the sludge transfer from the activated sludge tank to the secondary clarification tank can be reduced or even in the event of the highest load, the activated sludge can be moved from the secondary clarification tank to the activated sludge tank.
  • the two serious disadvantages of a conventional biological cleaning stage can thus be overcome.
  • the secondary clarifier is thus optimized for the highest load on the smallest necessary storage space.
  • the sludge transfer itself can be controlled in such a way that it occurs significantly reduced or even reverses.
  • the object of the present invention is to use a method and a system to generate a short-circuit flow for temporarily increasing the hydraulic load on the settling tank in phases of low external load which, instead of increasing the inlet energy by promoting fluid into the incoming volume flow, influences the efficiency of the settling tank ,
  • the vertical distance between the separating mirror and the inlet surface can be influenced via the height of the separating mirror.
  • the separating mirror can be kept on a raised level by increasing the internal hydraulic load on the sedimentation tank.
  • the solution to this task enables the inlet area to the sedimentation basin to lie high without any variability, particularly in the upper half of the basin, for a high hydraulic load without the inlet surface necessarily lying above the separating mirror in phases of low external hydraulic load.
  • the invention thus fulfills the task of overcoming the two serious disadvantages of shifting sludge from the mixing reactor into the settling tank and at the same time achieving the optimum cleaning effect.
  • the solution In combination with an inlet surface, the height of which can be changed in accordance with disclosure specification EP 1 354 614 AI, the solution enables maximum control over the sludge displacement to be achieved. This is particularly advantageous in particular because in this way flexible on z.
  • the object is surprisingly achieved in that the efficiency of the sedimentation basin with regard to its utilization can be reduced by technical measures in the described method by supplying the sedimentation basin to the volume flow flowing in the short circuit, that is to say on a shortened flow path, additional suspension volume flow.
  • the volume flow in the short circuit originates from the sedimentation basin and is formed by direct removal from the sedimentation basin itself or by extraction from the return line through which fluid flows from the sedimentation basin.
  • a shortened flow path is characterized in that the volume flow of the suspension originating from the settling tank or the return line is surely superimposed on the incoming volume flow to the settling tank at an earlier point in time than if it were to flow through the flow path of the system-internal circuit between the mixing reactor and the settling tank.
  • the volume flow is therefore added along a shortened flow path in the supply line to the settling tank, in its inlet structure or directly into the main flow of the incoming volume flow flowing in the tank. If the mixing reactor and settling tank are arranged one inside the other, a space that is structurally delimited towards the mixing reactor and that borders directly on the settling tank can take over the function of the inlet structure.
  • a control system can change the volume flow in the short circuit and thus to the desired total load on the sedimentation tank adjust and consequently raise the height of the separating mirror by reducing the hydraulic efficiency above its minimum achievable height. This can be done by measuring the height of the separating mirror directly adapted to it or, for example, by measuring the volume flow currently flowing into the system by indirectly adapting to the height of the separating mirror.
  • a further advantageous solution is obtained if a partial volume flow from the return line of the separated phase is not fed to the mixing reactor, but rather to the volume flow that flows into the settling tank.
  • a particularly advantageous solution is obtained if one of the aforementioned solutions is combined with an inlet structure to form the sedimentation basin, the inlet of which is designed in such a way that the excess of the inlet energy can be controlled by variability in the height of the incoming volume flow and / or variability in the inlet area through which it flows.
  • a device disclosed in patent specification DE 43 29 239 C2 with lamella packets in the outlet of the mixing basin makes use of the principle of the lamella separation in order to reduce the amount of heavier particles in the suspension flowing into the sedimentation basin. This process reduces the particle load in the sedimentation tank. In phases of low hydraulic load on the system, this can lead to problems with the separation performance of the sedimentation tank. Such devices are therefore to be controlled or regulated in practice.
  • lamella packets When the hydraulic load is low, for example, individual lamella packets are bypassed by the flow, so that the particle load in the sedimentation tank rises without influencing the hydraulic load, while in high-load hydraulic phases the lamella packets are operated in an optimized manner and thus when the hydraulic flow is again unaffected Load
  • the load on the sedimentation tank with particles to be separated decreases.
  • lamella packets are also designed with a corresponding effect on the inlet surface or inside the sedimentation tank.
  • a further advantageous solution thus results from the fact that one of the aforementioned solutions is combined with a device with lamella separation or another device which influences the solids load in the sedimentation tank.
  • a control system can adjust the total load by influencing these devices in a coordinated manner.
  • mixing reactors are at least partially provided with devices which have a positive influence on the ambient conditions in order to increase the degradation effect. These can be surface aerators or pressure aerators, for example. Settling tanks are not provided with such devices. An increased short-circuit flow, which is not passed through the mixing reactor with such devices, can have negative biological-procedural effects for the organisms of the activation system. This possible disadvantage resulting from the use of a short-circuit flow according to the invention may need to be overcome.
  • the mixing basin is to be arranged entirely within the settling basin, so that it itself fulfills the additional function of an inlet structure with suitable devices for improving the environmental conditions for the organisms from the short-circuit current.
  • a particularly advantageous solution to the problem on which the invention is based arises from a hydraulic as well as from a procedural point of view for aeration systems, if the aforementioned solutions for round secondary clarifiers are combined with larger inlet structures, which solve their interior by means of devices use tasks other than phase separation.
  • a ventilation zone and a subsequent anaerobic degassing zone can usefully be provided within the intake structure.
  • the basic function of the invention is independent of the geometric shape of the surface of the basin. It is also independent of whether the inlet area to the sedimentation basin is located inside the basin or on its periphery. It is independent of whether individual or all pools are structurally separate, adjoin one another or are built into one another and thus in the latter cases supply lines and / or return lines are completely or partially omitted.
  • Fig. 2 combination of mixing reactor and settling tank with an additional line for connecting the return line and feed line;
  • Fig. 3 combination of the mixing reactor and settling tank with a line in the settling tank, with which volume flow can be conveyed from the settling tank into the inlet structure;
  • Fig. 4 combination of mixing reactor and settling tank with volume flow-promoting devices in the settling tank, which downstream of the inlet surface can convey additional volume flow inside the inflow volume flow;
  • Fig. 5 Combination of mixing reactor and sedimentation basin, in which the inlet structure is designed in such a way that it has openings through which volume flow can flow from the sedimentation basin into the inlet structure and, in addition, the excess of the inlet energy due to the variability in height of the inflowing volume flow and through variability the inflow area can be checked;
  • Fig. 8 plant in which the mixing reactor is arranged within the settling tank, with additional lines for connecting the return line and the mixing reactor, the inlet of the additional line to the mixing reactor being such that parts of the flow path in the mixing reactor are bypassed.
  • the system shown in FIG. 1 is combined with an inlet structure 4 which has openings 10 through which a volume flow can be conveyed from the settling basin 6 into the inlet structure.
  • the inlet structure is designed in terms of fluid mechanics so that the openings 10 in the inlet structure have a sufficiently lower pressure than outside the inlet structure, a controlled volume flow from the sedimentation basin into the inlet structure can be initiated by checking the cross-sectional area of the openings 10 - for example, through orifices or slides become.
  • suitable volume flow-promoting devices such as pumps or screws, the volume flow can also be conveyed mechanically.
  • One or more openings 10 can also be combined with any other shaped, rigid or variable inlet structures within or on the periphery of a settling basin 6.
  • FIG. 2 shows an example of a system in which supply line 3 and return line 9 are connected by an additional line 11 through which volume flow can be branched off from the return line and conveyed into the supply line to settling tank 6.
  • FIG. 3 shows an example of a system in which volume flow from the settling basin 6 into the inlet structure 4 can be conveyed with a line 14 in the settling basin.
  • the sau The end of line 14 can also advantageously end at other points in the settling tank 6.
  • Line 14 is shown here by way of example on a peripheral inlet structure 4 which, as a ring line, runs partially or completely around the periphery of the settling tank 6.
  • the ring line can, for. For example, it can also be designed to be displaceable in height in order to be able to additionally control the excess energy at the inlet surface.
  • Line 14 can also be combined with any other shaped, rigid or variable inlet structures within or on the periphery of a settling basin 6.
  • FIG. 4 shows an example of a system in which flow-promoting apparatuses 13, such as pumps or rotors, can be used to convey volume flow in the settling basin 6 within the settling basin into the volume flow flowing through the inlet surface 5.
  • the flow-promoting apparatuses 13 can also be combined on the suction and / or pressure side with suitable lines and / or constructions that divert the flow in order to have the least possible negative influence on the flow conditions in the settling tank and thus on the settling processes.
  • Flow-promoting devices 13 can also be combined with any other shaped, rigid or variable inlet structures within or on the periphery of a settling basin 6.
  • FIG. 5 shows an example of a system in which one of the advantageous solutions of the invention, here openings 10, through which a volume flow can be conveyed from the settling basin 6 into the inlet structure 4, is combined with a central inlet structure 4 to the settling basin 6 by means of a telescopic tubular ring 14a and a height-adjustable ring plate 14b, the height of the inlet surface 5 and the cross-sectional area through which it flows can be changed in order to control the excess energy at the inlet surface.
  • openings 10 through which a volume flow can be conveyed from the settling basin 6 into the inlet structure 4
  • a central inlet structure 4 to the settling basin 6 by means of a telescopic tubular ring 14a and a height-adjustable ring plate 14b
  • FIG. 6 shows an example of a system in which the settling tank 6 is arranged within the mixing reactor 2, combined with one of the advantageous solutions of the invention, here a line 12 in the settling tank, by means of which volume flow can be conveyed from the settling tank 6 into the inlet structure 4.
  • the system shown in FIG. 7 is combined with an inlet structure 4 which has openings 10 through which a volume flow can be conveyed from the settling basin 6 into the inlet structure.
  • Additional devices 15, in this case pressure ventilation in a ventilation zone and a mixer, are built into the intake structure.
  • the ventilation zone can extend over a partial volume or over the entire volume of the intake structure.
  • FIG. 8 also shows an example of a plant in which a mixing reactor 2 with devices 15 is arranged within the settling tank 6 and thus also takes on the function as an inlet structure 4. Volume flow can be branched off from the return line through line 11. Volume flow can thus be conveyed into the central structure via a shortened flow path. Lines 9 and 11 can alternatively also pierce the partition between the mixing reactor and settling tank in a direct way.
  • FIG. 9 shows an example of a plant in which the settling basin 6 is arranged within the mixing reactor 2, combined with a space located between the mixing reactor and the settling basin, which functions as an inlet structure.
  • the settling basin 6 is arranged within the mixing reactor 2, combined with a space located between the mixing reactor and the settling basin, which functions as an inlet structure.
  • volume flow can be branched off from the return line and fed to the basin, which functions as an inlet structure.
  • the partition between the inlet structure and settling basin can be flowed through directly through an opening in the partition.
  • the mixing reactor can alternatively also be arranged within the settling basin and separated from it by an intermediate space which functions as an inlet structure.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)

Abstract

L'invention concerne un procédé de mélange d'un fluide multiphase, dans un réacteur à mélange, avec séparation subséquente de phases différemment denses dans un bassin pouvant être utilisé, au moins de façon intermittente, comme bassin de décantation, et recyclage des phases séparées dans le réacteur à mélange. En vue d'accroître la charge du bassin de décantation, l'invention est caractérisée en ce que le flux volumique provenant, par intermittence, du bassin de décantation ou de la conduite de recyclage est dirigé, par un parcours d'écoulement raccourci, vers le courant d'amenée du bassin de décantation. Une installation pour la mise en oeuvre de ce procédé comprend un réacteur à mélange (2) et un bassin de décantation (6), de telle façon que le flux volumique provenant du bassin de décantation (6) ou d'une conduite de recyclage (9) soit dirigé, par un parcours d'écoulement raccourci, vers le courant d'amenée du bassin de décantation (6).
EP04803854A 2003-12-16 2004-12-14 Procede de melange et de separation subsequente d'un fluide multiphase, et installation pour la mise en oeuvre de ce procede Withdrawn EP1694418A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10361144 2003-12-16
PCT/EP2004/014231 WO2005058451A1 (fr) 2003-12-16 2004-12-14 Procede de melange et de separation subsequente d'un fluide multiphase, et installation pour la mise en oeuvre de ce procede

Publications (1)

Publication Number Publication Date
EP1694418A1 true EP1694418A1 (fr) 2006-08-30

Family

ID=34683873

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04803854A Withdrawn EP1694418A1 (fr) 2003-12-16 2004-12-14 Procede de melange et de separation subsequente d'un fluide multiphase, et installation pour la mise en oeuvre de ce procede

Country Status (2)

Country Link
EP (1) EP1694418A1 (fr)
WO (1) WO2005058451A1 (fr)

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1142798B (de) * 1955-10-25 1963-01-24 Forschungsgesellschaft Der Iaw Einlaufvorrichtung fuer Klaerbecken
BE789233A (fr) * 1971-09-28 1973-01-15 Degremont Procede et appareil perfectionnes pour l'epuration biologique des eaux residuaires
DE4329239C2 (de) * 1993-08-26 1997-09-11 Ivan Prof Dr Ing Sekoulov Verfahren und Vorrichtung zur biologischen Abwasserreinigung
ATE496668T1 (de) * 2002-04-04 2011-02-15 Hydrograv Gmbh Absetzbecken

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2005058451A1 *

Also Published As

Publication number Publication date
WO2005058451A1 (fr) 2005-06-30

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Inventor name: ARMBRUSTER, MARTIN