WO2016033625A1 - Procédé et dispositif de purification biologique des eaux usées - Google Patents

Procédé et dispositif de purification biologique des eaux usées Download PDF

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Publication number
WO2016033625A1
WO2016033625A1 PCT/AT2015/050208 AT2015050208W WO2016033625A1 WO 2016033625 A1 WO2016033625 A1 WO 2016033625A1 AT 2015050208 W AT2015050208 W AT 2015050208W WO 2016033625 A1 WO2016033625 A1 WO 2016033625A1
Authority
WO
WIPO (PCT)
Prior art keywords
tank
phase
tanks
wastewater
sludge
Prior art date
Application number
PCT/AT2015/050208
Other languages
English (en)
Inventor
Kurt Ingerle
Original Assignee
Kurt Ingerle
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 Kurt Ingerle filed Critical Kurt Ingerle
Publication of WO2016033625A1 publication Critical patent/WO2016033625A1/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
    • C02F3/1236—Particular type of activated sludge installations
    • C02F3/1263—Sequencing batch reactors [SBR]
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2203/00—Apparatus and plants for the biological treatment of water, waste water or sewage
    • C02F2203/002—Apparatus and plants for the biological treatment of water, waste water or sewage comprising an initial buffer container
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2203/00—Apparatus and plants for the biological treatment of water, waste water or sewage
    • C02F2203/006—Apparatus and plants for the biological treatment of water, waste water or sewage details of construction, e.g. specially adapted seals, modules, connections
    • 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
    • C02F3/1278—Provisions for mixing or aeration of the mixed liquor
    • C02F3/1284—Mixing devices
    • 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 carrying out biological purification of communal or similar wastewater with the aid of activated sludge according to the preamble of claim 1, and to a device for carrying out this method.
  • a method for biological purification of wastewater with the aid of activated sludge in which the wastewater is first introduced into an activated sludge tank that can be ventilated and then into a sedimentation tank, in which activated sludge and treated water are separated and, after the separation process, activated sludge is fed back into the activated sludge tank and treated water is drawn off, is known from European patent EP 0 851 844.
  • a number of operating cycles are carried out in the sedimentation tank over the course of a day and comprise a stirring phase U, a pre-sedimentation phase V and a draw-off phase A, wherein, in the stirring phase, the activated sludge is again mixed with the water, in the pre-sedimentation phase the activated sludge is sedimented, and in the draw-off phase treated water is drawn off.
  • the purification process takes place in a biological twin-tank system that is to say in the activated sludge tank and in the sedimentation tank, with continuous inflow and intermittent outflow. During the period of no outflow, the water level increases as a result of the inflow (filling principle) .
  • the patent claim of this method is based on the fact that sedimented activated sludge is returned to the activated sludge tank of the "twin-tank system with filling operation" after the pre- sedimentation phase and before the stirring phase.
  • the contents of the B tank activated sludge tank
  • the SU tank sedimentation tank
  • Both tanks border one another and are continuously interconnected hydraulically in the base region.
  • a similar method is known from international patent application WO 2001 046075 A2 (PCT/ATOO/00322 ) , in which sedimented, thickened activated sludge is returned from the SU tanks into the B tank after the V phases, but before the U phases.
  • the solution to this problem lies according to WO 2011/091452 Al in the arrangement of two ventilation fields 1 and 2 (mostly fine bubble ventilation) in the B tank, at the edges bordering the SU tanks, said ventilation fields being operable together or separately depending on the requirements of the process.
  • a ventilation-free region (approximately one third of the tank width) remains in the centre of the tank.
  • WO 2011/091452 Al concerns the problem of introducing the wastewater to be purified Q into the B tank in such a way that there is no drifting of the wastewater to be purified Q, which is still purified insufficiently, into the SU tanks, the B tank and all modules are subject to equal hydraulic load, and constant conditions are obtained in the two SU tank units of a module. Care should also be taken to ensure that the flow conditions in the S phase (large vertical hydraulic flow) are not disturbed and that there is no constant depositing of activated sludge Q s in the unventilated region of the B tank.
  • the wastewater to be purified Q is fed via one or more horizontal pipelines, which extend in the longitudinal direction of the B tank, are situated in the centre of the tank at approximately half the water depth or at the base and have openings.
  • the openings will preferably be arranged in such a way that an escape horizontally in both directions and uniform coating of the B tank and modules is possible.
  • the object of the present invention is to improve and/or complement the method described in the introduction for biological wastewater purification according to WO 2011/091452 Al in such a way, that costs can be saved in specified cases. This object is met by the features of the characterizing part of claim 1.
  • activated sludge process (second construction step) with primary treatment combined with separate sludge stabilisation needs only a B-tank with the half volume of the first method.
  • the stabilisation of the surplus sludge will be treated with digestion or incineration.
  • the required volume of the B-tank is more than two times higher than for the second construction step. Therefore, it is possible to start with the first construction step and pass after years later to the second construction step.
  • the capacity of the treatment plant enlarges thus to the double size (i.e. to the doubled capacity) with only doubling the SU-tanks.
  • the second construction step has the advantage to use the digester gas of a digestion for producing energy.
  • all SU-tanks will be situated on one side of the B-tank and for the second construction step the B-tank remains the same as before and additional added SU-tanks will be provided on the opposite side (see reference sign "1" in Fig. la) of the already existing SU-tanks.
  • the sum of the SU-tanks preferably have at least the doubled volume of the sum of the SU-tanks in the first construction step.
  • the sewerage channels are still incomplete and therefore it is economical very advantageous to start with the first construction step and enlarge later to the second construction step. It is important that already for the first construction step the wall of the B-tank on the opposite side of the already existing SU-tanks receives all required equipment for the later expansion to the second construction step (openings, shaft for airlifts, platform, etc.) . These openings will be closed till the expansion: for example with stainless steel plates. During the expansion of the treatment plant to the second construction step the operation of the plant will be completely maintained.
  • a large treatment plant (a large treatment plant refers to a treatment plant in the range of roughly 500 000 PE or more for instance) consists of many modules. It is therefore very difficult to distribute exactly the inflow into the B-tank in such a manner, that every module gets the same amount (identical quantity) of wastewater.
  • Several pipes with large diameters in the longitudinal direction of the B-tank impair the flow conditions and should be avoided. It is better to arrange these pipes under the bottom of the B-tank.
  • An advantageous solution is given in the distribution for two modules with one pipe and only two openings (see Fig. 2c) . To get the same amount of wastewater into each pipe a sufficient large compensating tank with a horizontal water level is necessary.
  • the wastewater flows over a flat slide (preferably in stainless steel, openable and closable) and then in the pipe.
  • the wastewater will be introduced in the surface of the B-tank and in this middle area.
  • the outflow of the treated wastewater is of high relevance for treatment plants.
  • the increase of the water level in the SU-tanks may be low, situations occurring in the winter term (frost) are to consider and floating sludge may not reach or not enter a discharge device.
  • a number of horizontal arranged openings with an area of approximately 0,6 to 2,0 dm 2 are openable and closable by a system consisting of horizontally displaceable slides (for example plates, slide chain) . Maintenance services can be easily performed on the system.
  • the lower edges of the openings determine the minimal water level in the SU- tanks .
  • the infrastructure street may be designed in a manner that is already prepared for the second step.
  • Figure la and lb show a schematic illustration of a wastewater treatment system in the exemplary embodiment, consisting of three lines with two modules per line,
  • Figure 2a, 2b and 2c show the inflow of wastewater to be purified into the B-tank below the bottom thereof, c) outline, a) vertical section 1, b) vertical section 2.
  • Figure 3 shows the outflow of the treated water with horizontal designed outflow openings by horizontal moving flat slide chain.
  • FIG 4 shows the outline of the infrastructure street of a large treatment plant (1 Mio PE, consisting of foure lines with 12 modules per line) .
  • the wastewater flows through a main channel 3 into the distribution tank 4 into the inflow system 5, into the B-tank 6, into the outflow system 7 (with slide chain) and into the outflow channel 8.

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 exécuter une purification biologique des eaux usées à l'aide de boue activée, dans lequel les eaux usées sont d'abord introduites dans un réservoir de boue activée qui peut être ventilé (appelé ci-après le réservoir B) puis, en alternance, dans l'un d'un certain nombre de réservoirs de sédimentation et de recirculation (appelés ci-après les réservoirs SU) reliés hydrauliquement de façon continue au réservoir B, et dans lequel un certain nombre de cycles de fonctionnement sont exécutés au cours d'une journée. Les réservoirs SU sont tous situés sur un premier côté du réservoir B, pour permettre le positionnement de réservoirs SU supplémentaires sur le côté opposé des réservoirs SU déjà existants.
PCT/AT2015/050208 2014-09-03 2015-09-01 Procédé et dispositif de purification biologique des eaux usées WO2016033625A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AT506082014 2014-09-03
ATA50608/2014 2014-09-03

Publications (1)

Publication Number Publication Date
WO2016033625A1 true WO2016033625A1 (fr) 2016-03-10

Family

ID=54238164

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/AT2015/050208 WO2016033625A1 (fr) 2014-09-03 2015-09-01 Procédé et dispositif de purification biologique des eaux usées

Country Status (1)

Country Link
WO (1) WO2016033625A1 (fr)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0851844A1 (fr) 1995-08-28 1998-07-08 INGERLE, Kurt Procede d'epuration des eaux usees
US6132614A (en) * 1997-11-26 2000-10-17 Pacific Advanced Civil Engineering, Inc Modular wastewater treatment system
WO2001046075A2 (fr) 1999-12-21 2001-06-28 Kurt Ingerle Procede pour l'epuration biologique d'eaux usees
WO2011091452A1 (fr) 2010-01-28 2011-08-04 Kurt Ingerle Procédé et dispositif d'épuration biologique des eaux usées

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0851844A1 (fr) 1995-08-28 1998-07-08 INGERLE, Kurt Procede d'epuration des eaux usees
US6132614A (en) * 1997-11-26 2000-10-17 Pacific Advanced Civil Engineering, Inc Modular wastewater treatment system
WO2001046075A2 (fr) 1999-12-21 2001-06-28 Kurt Ingerle Procede pour l'epuration biologique d'eaux usees
WO2011091452A1 (fr) 2010-01-28 2011-08-04 Kurt Ingerle Procédé et dispositif d'épuration biologique des eaux usées

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