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]
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
  • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
  • B01F23/00—Mixing according to the phases to be mixed, e.g. dispersing or emulsifying
  • B01F23/20—Mixing gases with liquids
  • B01F23/23—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids
  • B01F23/233—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids using driven stirrers with completely immersed stirring elements
  • B01F23/2331—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids using driven stirrers with completely immersed stirring elements characterised by the introduction of the gas along the axis of the stirrer or along the stirrer elements
  • B01F23/23311—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids using driven stirrers with completely immersed stirring elements characterised by the introduction of the gas along the axis of the stirrer or along the stirrer elements through a hollow stirrer axis
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
  • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
  • B01F23/00—Mixing according to the phases to be mixed, e.g. dispersing or emulsifying
  • B01F23/20—Mixing gases with liquids
  • B01F23/23—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids
  • B01F23/233—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids using driven stirrers with completely immersed stirring elements
  • B01F23/2331—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids using driven stirrers with completely immersed stirring elements characterised by the introduction of the gas along the axis of the stirrer or along the stirrer elements
  • B01F23/23314—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids using driven stirrers with completely immersed stirring elements characterised by the introduction of the gas along the axis of the stirrer or along the stirrer elements through a hollow stirrer element
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
  • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
  • B01F27/00—Mixers with rotary stirring devices in fixed receptacles; Kneaders
  • B01F27/05—Stirrers
  • B01F27/07—Stirrers characterised by their mounting on the shaft
  • B01F27/072—Stirrers characterised by their mounting on the shaft characterised by the disposition of the stirrers with respect to the rotating axis
  • B01F27/0725—Stirrers characterised by their mounting on the shaft characterised by the disposition of the stirrers with respect to the rotating axis on the free end of the rotating axis
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
  • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
  • B01F27/00—Mixers with rotary stirring devices in fixed receptacles; Kneaders
  • B01F27/05—Stirrers
  • B01F27/11—Stirrers characterised by the configuration of the stirrers
  • B01F27/117—Stirrers provided with conical-shaped elements, e.g. funnel-shaped
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
  • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
  • B01F27/00—Mixers with rotary stirring devices in fixed receptacles; Kneaders
  • B01F27/80—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a substantially vertical axis
  • B01F27/81—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a substantially vertical axis the stirrers having central axial inflow and substantially radial outflow
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
  • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
  • B01F27/00—Mixers with rotary stirring devices in fixed receptacles; Kneaders
  • B01F27/80—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a substantially vertical axis
  • B01F27/85—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a substantially vertical axis with two or more stirrers on separate shafts
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
  • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
  • B01F27/00—Mixers with rotary stirring devices in fixed receptacles; Kneaders
  • B01F27/80—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a substantially vertical axis
  • B01F27/85—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a substantially vertical axis with two or more stirrers on separate shafts
  • B01F27/851—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a substantially vertical axis with two or more stirrers on separate shafts the receptacle being subdivided in adjacent compartments
• • 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
• • 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
  • C02F3/20—Activated sludge processes using diffusers
  • C02F3/205—Moving, e.g. rotary, diffusers; Stationary diffusers with moving, e.g. rotary, distributors
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
  • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
  • B01F2101/00—Mixing characterised by the nature of the mixed materials or by the application field
  • B01F2101/305—Treatment of water, waste water or sewage
• • C—CHEMISTRY; METALLURGY
  • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
  • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
  • C02F2301/00—General aspects of water treatment
  • C02F2301/08—Multistage treatments, e.g. repetition of the same process step under different conditions
• • 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 invention relates to a wastewater purification device and a method for purifying wastewater, in particular a so-called SBR method.
• EP 1 132 348 B1 discloses a wastewater purification device and a water purification process for biological wastewater treatment.
• the waste water purification device has an elongated basin which is divided into several treatment sections by means of partition walls.
• SBR process Sequencing Batch Reactor
• the wastewater is brought into contact with an activated sludge in a first treatment section.
• the suspension formed from the wastewater and the activated sludge is then aerated, in particular in a second treatment section.
• the suspension is neither aerated nor moved in a third treatment section.
• the clarified water is drawn off as a supernatant using a decanter.
• the SBR process is usually carried out in batches.
• the movable partitions are made from a waterproof, flexible film. Such a film is not particularly durable. Pumps and pipes are required to transfer the wastewater from one treatment section to the next. The clarification efficiency of the known waste water purification device is not too high.
• the object of the invention is to eliminate the disadvantages of the prior art.
• a wastewater purification device and a method should be specified which enable wastewater to be cleaned with improved efficiency.
• the wastewater purification device and the method should in particular also enable continuous purification of wastewater.
• a wastewater purification device for cleaning wastewater comprising: an elongated basin which has an inlet for supplying wastewater on its first narrow side, a first vertical agitator with a first hyperboloid agitator body attached to a vertical first agitator shaft, wherein the first vertical agitator is provided in a first treatment section on the first narrow side downstream of the inlet, a second vertical agitator with a second hyperboloid agitator attached to a vertical second agitator shaft, the second vertical agitator being provided in a second treatment section downstream of the first vertical agitator , a ventilation device with a fan for ventilating the wastewater taken up in the basin, a first drive device for rotating the first hyperboloid agitator in a first direction of rotation, a second drive device for rotating the zw eiten hyperboloid stirring bodies in a second direction of rotation opposite to the first direction of rotation, and a decanter, which is provided for discharging purified wastewater in a third treatment section on one
• the wastewater flows from the inlet on the first narrow side to the decanter on the second narrow side.
• the first vertical agitator is arranged downstream of the inlet and the second vertical agitator is arranged downstream of the first vertical agitator.
• Each of the vertical agitators has a hyperboloid agitator body as the agitator body.
• a flow is formed which is directed along the stirring shaft in the direction of the hyperboloid stirring body. The flow bends in a substantially horizontal direction on the surface of the hyperboloid stirring body. At some distance from the circumferential edge of the hyperboloid agitator, the flow then bends again in a vertical direction towards the surface of the wastewater.
• the flow then runs approximately parallel to the surface and then bends back in the direction of the agitator shaft.
• a circulating flow is formed by the action of the vertical agitator.
• the flow also rotates axially around the agitator shaft in accordance with its direction of rotation.
• a zone is formed between the successive vertical agitators in which the flow is directed essentially vertically upwards towards the surface of the wastewater.
• There the flow divides and returns to the respective treatment section.
• the wastewater in the first treatment section can be brought into contact with a high concentration of activated sludge.
• the wastewater in the second treatment section can be in contact with a lower concentration of activated sludge and, preferably at the same time, aerated. Ventilation can be in the treatment sections can be varied. The intensity of the aeration and the speed of rotation of the hyperboloid agitators can also be varied in the treatment sections.
• the proposed wastewater purification device enables efficient purification of wastewater. It also enables a continuous or quasi-continuous process sequence. Pumps and lines for transferring the treated wastewater from one treatment section to the next are not required. A transfer of the treated wastewater from one treatment section to the next can be controlled by suitable control of the Rotierge speed of the vertical agitators, the amount of wastewater supplied through the inlet and / or the amount of wastewater removed by means of the decanter.
• first transport ribs provided on an upper side of the hyperboloid stirring body have a first curvature and transport ribs provided on a further upper side of the second hyperboloid stirring body have a second curvature opposite to the first curvature.
• the proposed configuration of the transport ribs, the stirring efficiency and in particular the formation of the circulating flow can be improved.
• the ribs can also be straight.
• the first transport ribs have a first angle with respect to the radial direction and the second transport ribs have an opposite second angle with respect to the radial direction.
• At least one of the hyperboloid stirring bodies is designed as a hollow body and has a central opening for the passage of air and ventilation openings.
• the agitator shaft can be designed as a hollow shaft for supplying air to the central opening.
• the drive device can have a transmission with a hollow transmission shaft, one end of which is connected to the fan and the other end of which is connected to the hollow shaft.
• the Hyperboloid stirring body for both stirring and aeration of the waste water.
• several or all of the hyperboloid stirring bodies are designed as hollow bodies for ventilating the waste water.
• the ventilation device has at least one perforated air supply line which is supported on a floor of the basin and which is connected to the fan.
• Devices can also be provided which have a large number of perforated air supply lines. Such devices are generally known in the prior art.
• first vertical agitators following one another in the flow direction and / or in the second treatment section several second vertical agitators are provided consecutively in the flow direction, the hyperboloid agitators being rotated directly on successive vertical agitators each with an opposite direction of rotation.
• the proposed configuration is particularly suitable for long treatment basins and for the treatment of large amounts of waste water.
• the treatment basin can also be designed such that a plurality of vertical agitators are arranged in a direction perpendicular to the direction of flow. If vertical agitators are arranged next to one another in a direction perpendicular to the direction of flow, they are preferably each operated with the same direction of rotation.
• the hyperboloid stirring body is designed as a hollow body. It expediently has a central opening for the supply of air and air outlet openings.
• the agitator shaft can be designed as a hollow shaft for supplying air to the central opening.
• a drive device can have a transmission with a transmission hollow shaft, one end of which is connected to the fan and the other end to the hollow shaft.
• the proposed method enables wastewater to be cleaned particularly efficiently. Because of the proposed opposite directions of rotation of the successive agitators, it is possible to expose the wastewater in the treatment sections formed thereby to different conditions. For example, in the first treatment section the wastewater can be brought into contact with a high concentration of activated sludge, whereas in the second treatment section the wastewater can be brought into contact with an increased concentration of air.
• the process can be carried out both as a batch process and as a continuous or quasi-continuous process.
• the first rotational speed is advantageously selected to be lower than the second rotational speed. This makes it possible to contact the wastewater with a high concentration of activated sludge in the first treatment stage. In particular, undesired transport of activated sludge from the first treatment section into the second treatment section can be reduced or prevented.
• first rotation speeds can also be selected to be different.
• the first rotational speed can become greater in the downstream direction.
• the second rotational speeds can decrease in the direction of the third treatment section. This supports the separation of the suspension into activated sludge and clarified wastewater, which is desired in the third treatment phase.
• the first rotation speed is advantageously selected such that a concentration of activated sludge in a bottom half of the suspension is greater than in an upper half on the surface. In this way, the wastewater can be brought into contact with a particularly high concentration of activated sludge, particularly in the lower half on the bottom.
• first vertical agitators can be used in succession in the flow direction and / or in the second treatment section in A plurality of second vertical agitators can be provided successively in the direction of flow, the hyperboloid agitators of directly successive vertical agitators each being rotated in an opposite direction. In this way, a predetermined standing time of the waste water in the respective treatment sections can be ensured.
• the wastewater is fed continuously Lich.
• the process can be carried out in accordance with the SBR process.
• the wastewater is stirred in several successive steps. It can be ventilated in one or more steps at the same time. However, it is also possible to aerate the wastewater without stirring at the same time.
• the wastewater is only stirred with low intensity. There is no ventilation in this step.
• the step is used for sedimentation.
• the wastewater is stirred with low intensity, if necessary, in the first treatment section.
• decanting takes place in the third treatment section.
• wastewater can be continuously fed to the treatment basin through the inlet. Decanting can also be carried out continuously.
• Fig. 1 is a schematic plan view of a first Abwassermentssvor direction
• FIG. 2 is a schematic sectional view according to FIG. 1,
• Fig. 3 is a schematic plan view of a second wastewater purification device
• FIG. 4 shows a sectional view according to FIG. 3,
• FIG. 5 shows a schematic top view of a first Flyperboloid stirring body
• FIG. 6 shows a schematic top view of a second Flyperboloid stirring body
• Fig. 7 is a partially broken away perspective view of a third
• FIG. 8 shows a plan view of an upper shell, 9 shows a view from below according to FIG. 8,
• FIGS. 10 and 11 shows a bottom view according to FIGS. 10 and
• Figures 1 and 2 show intentions of a first sewage purification device.
• the first wastewater purification device comprises an elongated basin 1, which has an inlet 2 on its first narrow side S1 for supplying waste water. On a second narrow side S2 opposite the first narrow side S1, a decanter 3 for discharging purified wastewater is seen.
• a first long side of the basin 1 is denoted by L1
• an opposite, second long side is denoted by L2.
• a first vertical agitator 4 is provided downstream of the inlet, which has a first hyperboloid agitator 6 on a first agitator shaft 5.
• the reference number 7 denotes a second vertical agitator, which has a second hyperboloid agitator body 9 on a second agitator shaft 8.
• the first vertical agitator 4 has a first drive device (not shown here) with which the first Flyperboloid agitator body 6 can be rotated counterclockwise in plan view.
• the second vertical agitator 7 is provided with a second drive device (not shown here) with which the second fly perboloid agitator body 9 can be rotated clockwise.
• two first vertical agitators 4a, 4b and then two second vertical agitators 7a, 7b are provided in a flow direction directed from inlet 2 to decanter 3.
• the first drive devices (not shown here) of the first vertical agitators 4a, 4b are designed so that whose hyperboloid agitator 6a, 6b rotates in the opposite direction who the.
• the second drive devices are designed such that the second hyperboloid stirring bodies 9a, 9b are also rotated in the opposite direction.
• the first hyperboloid stirring body 6b of the first vertical agitator 5b is advantageously rotated in the opposite direction to the second hyperboloid stirring body 9a of the second vertical agitator 7a.
• successive hyperboloid stirring bodies 6a, 6b, 9a, 9b are rotated in opposite directions in this advantageous embodiment.
• At least one first vertical agitator 4, 4a, 4b is arranged.
• a second treatment section B provided downstream of the first treatment section A, at least one second vertical agitator 7, 7a, 7b is arranged.
• a third treatment section C following downstream of the second treatment section B no vertical agitator is arranged here.
• the decanter 3 is located there.
• at least one vertical agitator is also provided in the third treatment section C.
• ventilation devices are provided in the first A and in the second treatment section B. These can be perforated preliminary lines laid on the floor F of the basin 1. According to a preferred embodiment, the air is supplied through the hyperboloid stirring bodies 6, 6a, 6b, 9, 9a, 9b, which are preferably designed as hollow bodies.
• the rotation of one of the hyperboloid stirring bodies 6, 6a, 6b, 9, 9a, 9b results in each case a flow which flows from a surface O of a wastewater W taken in the basin 1 along the vertical stirring shaft 5, 8 to an upper side of the Hyperboloid agitator 6, 6a, 6b, 9, 9a, 9b is directed.
• the flow then bends parallel to the top of the hyperboloid stirring body 6, 6a, 6b, 9, 9a, 9b in a substantially horizontal direction. It then bends further and is directed again towards the upper side O.
• a circulating flow directed from the upper side O to a bottom F of the basin 1 results.
• flow compartments are formed when operating be adjacent vertical agitators 4, 4a, 4b, 7, 7a, 7b, wel che between two successive vertical agitators 4, 4a, 4b, 7, 7a , 7b resulting upward currents from the bottom F in the direction of the surface O and the two long sides L1 and L2 of the basin 1 are limited.
• the exchange or transport of the suspension from feed 2 to decanter 3 can be controlled by one or more of the following parameters:
• FIG. 5 shows, by way of example, a top view of an upper side 01 of the first hyperboloid stirring body.
• first Transportrip pen 10 which extend from the first agitator shaft 5 first in the radial direction to the peripheral edge U of the first hyperboloid agitator 6 in order.
• the first transport ribs 10 then bend, following a first curvature towards the circumferential edge U, in a tangential direction.
• Fig. 6 shows a plan view of another top of the second hyperboloid agitator 7.
• second transport ribs 11 which bend towards the peripheral edge U according to a second curvature in a tangential direction .
• the first The curvature is opposite to the second curvature.
• the first hyperboloid agitator 5 is particularly suitable for counterclockwise rotation
• the second hyperboloid agitator 7 is suitable for clockwise rotation.
• FIGS. 7 to 11 show an advantageous embodiment of the hyperboloid stirring bodies.
• a hyperboloid stirring body is attached to a hollow stirring shaft 12.
• the hyperboloid stirring body has a central connection section denoted by the reference symbol 13.
• the connection section 13 has a zentra len opening 14 for the passage of air.
• Reference number 16 denotes an upper shell, from the first top side 01 of which transport ribs 17 extend. With the reference numeral 18, a lower shell is designated, from the second top 02 walls 19 he stretch.
• the reference number 20 denotes an insert which is provided downstream of the opening 14 and forms an air distribution space 15.
• the insert 20 is designed in the manner of a conical cup and has several air distribution openings 21 on its peripheral wall. Each of the air distribution openings 21 opens into an air duct 22 formed by adjacent walls 19 and the upper shell 16 and the lower shell 18.
• shear ribs 23 are attached to the peripheral edge thereof.
• FIG. 8 shows a plan view of the first top side 01 of the upper shell.
• the transport ribs 17 extending from the first upper side 01 can be seen, which first extend from the opening 14 in a radial direction and then Bend towards the peripheral edge U in a tangential direction. Furthermore, the insert 20 downstream of the opening 14 with the air distribution openings 21 can be seen.
• FIG. 9 shows a view from below according to FIG. 8.
• the transport ribs 17 can be seen in the form of depressions.
• FIG. 10 shows a plan view of the second upper side 02 of the lower shell 18.
• the lower shell 18 is in its center, i. H. opposite the opening 14 provided in the upper shell 16, formed closed.
• the walls 19 extend from the second upper side 02.
• the walls 19 run - similar to the transport ribs 17 - from the center first in a radial direction and then bend in a substantially tangential direction towards the peripheral edge U.
• a plurality of holding devices 24, which form depressions in the second upper side 02, are located on the peripheral edge U.
• the holding devices 24 serve - as can be seen in particular in conjunction with the Fig. 11 explained below - to receive and fasten the shear ribs 23.
• FIG. 11 shows a view from below according to FIG. 10.
• the walls 19 in the form of depressions can be seen on a second underside U2 of the lower shell.
• An air outlet opening 25 is provided between each two adjacent Hal te Anlagen 24 or two adjacent shear ribs 23.
• Fig. 12 shows a schematic sectional view through a transmission 27 which is operatively connected to a motor 26.
• the transmission 27 has a hollow shaft 28, the first end of which is connected to an air supply line 29. A fan connected to the air supply line 29 is not shown here.
• a second end E2 of the hollow shaft 28 is connected to the hollow agitator shaft 12.
• a third end E3 of the hollow stirring shaft 12 is connected to the hyperboloid stirring body shown in FIGS. 7 to 11. 7 to 12 resulting in particular stirring and Begasungsein direction can for example on a traverse or bridge 30 (see Fig. 12) to be placed, which spans the basin 1 between the two long sides L1 and L2.
• a method for cleaning wastewater in particular an SBR method, can be carried out particularly efficiently.
• a predetermined amount of activated sludge is added to a pre-submitted waste water W in the first treatment section A in the basin 1.
• the at least one first vertical agitator 4, 4a, 4b is rotated at a predetermined first speed of rotation, so that a suspension is formed from the waste water W and the activated sludge.
• the at least one second vertical agitator 7, 7a, 7b is rotated at a second rotational speed.
• the second rotational speed is advantageously greater than the first rotational speed.
• the suspension When the vertical agitators are in operation, the suspension is circulated in accordance with the flow direction shown in FIGS. 2 and 4.
• the suspension is aerated with air, advantageously at the same time.
• the microorganisms contained in the living sludge are nourished.
• the microorganisms break down organic impurities in the wastewater.
• the suspension rests.
• the suspension can also be slowly stirred in the third treatment section C by means of at least one third vertical stirrer (not shown here). She points there Usually an even lower concentration of activated sludge than in the second treatment section B.
• a supernatant formed from clarified wastewater is formed, which is drawn off by means of the decanter 3.
• the at least one third vertical agitator is expediently switched off.
• the proposed method can advantageously be carried out continuously by constantly feeding wastewater through inlet 2 and discharging a corresponding amount of treated wastewater through decanter 3.
• the proposed method can also be carried out in a conventional manner in the manner of an SBR method.
• the first 4, 4a, 4b and second vertical agitators 7, 7a, 7b are only operated temporarily.
• a supernatant formed from clarified wastewater forms in the treatment section C, which can then be drawn off by means of the decanter 3.

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• Chemical & Material Sciences (AREA)
• Life Sciences & Earth Sciences (AREA)
• Chemical Kinetics & Catalysis (AREA)
• Organic Chemistry (AREA)
• Engineering & Computer Science (AREA)
• Environmental & Geological Engineering (AREA)
• Water Supply & Treatment (AREA)
• Hydrology & Water Resources (AREA)
• Microbiology (AREA)
• Biodiversity & Conservation Biology (AREA)
• Mixers Of The Rotary Stirring Type (AREA)
• Activated Sludge Processes (AREA)
• Aeration Devices For Treatment Of Activated Polluted Sludge (AREA)
• Cleaning By Liquid Or Steam (AREA)
• Physical Water Treatments (AREA)
• Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
• Cleaning In General (AREA)
• Treatment Of Liquids With Adsorbents In General (AREA)
• Biological Treatment Of Waste Water (AREA)

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• 2019
  • 2019-05-03 DE DE102019111489.6A patent/DE102019111489A1/de active Pending
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