EP2709742A1

EP2709742A1 - Device for separating gases from a suspension

Info

Publication number: EP2709742A1
Application number: EP12715976.2A
Authority: EP
Inventors: Stefan BAUMGÄRTNER; Manfred MUHR
Original assignee: Lenzing Technik GmbH
Current assignee: Lenzing Technik GmbH
Priority date: 2011-05-16
Filing date: 2012-04-18
Publication date: 2014-03-26
Also published as: WO2012156169A1; AT511542B1; AT511542A1

Abstract

The invention relates to a device (1) for separating gases from a suspension, comprising a reactor (2) having at least one wastewater supply (7) and at least one clean water discharge (8) and a gas extractor (9), a return sludge discharge (10), and a return sludge supply (11), further comprising a circulating agitator (17) arranged in a mixing zone (13) in the reactor interior (6) of the device and attached to an agitator shaft (18), wherein a sludge accumulation zone (15) is separated at least in segments from the mixing zone (13) by at least one separating film (21).

Description

Device for separating gases from a suspension

The invention relates to a device for the separation of gases from a suspension according to the features of the preamble of claim 1. Furthermore, variants of a method for the separation of gases from a suspension with the aid of a device according to the invention and preferred uses of the device are given.

Different embodiments of devices for separating gases from suspensions are known from the prior art. Such devices are used for example in anaerobic wastewater treatment to separate biogas from a biological sludge containing wastewater suspension. For example, WO 96/32177 shows a slanted plate separator in which a plurality of separator plates are arranged parallel to each other. The separator plates in this case have a notch-like, V-shaped profile and are inclined in the device to the level of

Liquid level arranged. Fluid supplied to the bottom of the device flows obliquely upward, collecting gas bubbles contained therein in the edges of the V-shaped profiles, and discharging the trapped gas from the deposition chamber. The gas discharge device further comprises a collection cap which extends substantially horizontally through the edges of the V-shaped separator plates and which is located below the water level.

A disadvantage of this design is that the production and attachment of several profiled separator plates, each with the same plate spacing, from a

Collective cap to be penetrated, consuming. Furthermore, it is disadvantageous that at high sludge loads, there is a blocking of the interspaces between the rigid separator plates. The blocked interstices of the separator plates must be cleaned by blowing in gas. However, this has the disadvantage that during the blowing of gas an undesirably high solids content is expelled from the reactor. A check whether the cleaning of the blocked oblique separator plates was sufficient, is not possible due to the closed system, which is another disadvantage of this design. It is therefore the object of the present invention to provide a device for the separation of gases from a suspension, which avoids the disadvantages of the prior art.

This object is achieved in a device according to the preamble of claim 1 with the features of the characterizing part of claim 1. The subclaims relate to further advantageous embodiments of the invention.

In a device according to the invention for the separation of gases from a suspension, comprising a reactor with at least one wastewater feed and at least one clear water drain and a gas outlet, a return sludge flow and a return sludge feed, further comprising a in his

Reactor interior arranged in a mixing zone Umwälzrührwerk which is attached to a stirrer shaft, that in the reactor interior a Schlammabsetzzone is separated by at least one release film at least in sections from the mixing zone.

Advantageously, in a device according to the invention, the interior of the reactor is divided into several zones. At the bottom of the reactor is the mixing zone into which the circulation agitator protrudes and which is essentially up to the level of a

Basisumfangs the release film is sufficient. For example, gas laden with sludge and sewage enters the device in the lower portion of the mixing zone. Above this, during operation, ie when the agitator is switched on, a so-called separation zone is formed, in which, on the one hand, gas and clarified liquid rise upwards and, at the first, gravity-induced settling of sludge back into the underlying one

Mixing zone is coming.

The at least one separating film prevents unwanted short-circuit flows or mixtures between the mixing zone or the separation zone on the one hand and the sludge settling zone preferably located above the separating film on the other hand. In the Schlammabsetzzone there is a further settling of already degassed sludge. At the head of the reactor interior, so above the release film, as well as above the Schlammabsetzzone, there is the gas space, which is provided with a gas vent.

As a release film, a movable, tear-resistant material is used, which can be implemented in one or more layers. As a release film, a plastic film is preferably used. Likewise, in the context of the invention, release films made of other, tear-resistant Materials are used. Furthermore, it is possible within the scope of the invention, a plurality of release films parallel to each other or at an angle to each other and / or at least partially overlapping each other for separating the Schlammabsetzzone of the

To arrange mixing zone.

The reactor can be made of different materials depending on the application. For example, the reactor may be made of a concrete coated on its inside with plastic. It is also conceivable to produce a reactor made of steel, preferably of stainless steel, or of a steel coated with enamel on its inside. Furthermore, the use of composite materials for the production of the reactor shell is conceivable.

Particularly useful in a device according to the invention is the

Mud settling zone disposed in the reactor interior above the at least one release film.

Advantageously, in a device according to the invention, the at least one release film in the interior of the reactor is arranged substantially funnel-shaped, wherein a separation film opening forming a smaller free cross-section is arranged elevated relative to a base circumference about a funnel height.

The at least one funnel-shaped separating film is fixed in the interior of the reactor in such a way that it tapers from its base circumference towards the separating film opening.

In a reactor which is designed substantially cylindrical, the release film thus preferably has approximately the shape of a cone or truncated cone shell. In an embodiment with a plurality of release films, these can be arranged, for example, as concentric cones or truncated cones.

Likewise, it is conceivable within the scope of the invention to use a reactor having an elliptical or polygonal cross-section. Suitably, the release films in these cases are each adapted to the individual cross-sectional geometry of the reactor.

The release film is inclined with respect to a longitudinal axis of the reactor at an angle between 30 ° and 80 °, preferably between 40 ° and 70 °. In an apparatus according to the invention, the basic circumference of the funnel-shaped separating film expediently adjoins, at least in sections, a wall circumference of the device

Reactor interior.

This version has the advantage that the base circumference of the release film to the

Surrounding wall circumference of the reactor interior and thus short-circuit flows between the mixing zone and the Schlammabsetzzone be avoided above the release film. Obstruction of the sedimentation of the sludge by ascending gas bubbles or flow turbulences in the sludge settling zone is thus reliably prevented. The sludge sedimentation in the Schlammabsetzzone is significantly improved by the release film, which extends to the wall circumference of the reactor, and the Abscheiderleistung the device according to the invention is advantageously increased.

In the case of a cylindrical reactor of circular cross-section, the

Base circumference of the release film, for example, be provided with a mounting ring for attachment to the wall circumference of the reactor interior.

In a particularly expedient embodiment of the device according to the invention, the separating film opening of the separating film with respect to the Schlammabsetzzone in

Longitudinal axis direction increased attached.

The level of the release film opening is an overflow height above the

Increased liquid level of the sludge settling zone. The separating film opening is preferably designed as a substantially annular, horizontal overflow weir and serves both the agitator shaft bushing, as overflow weir for the overflowing suspension, and as a degassing threshold for the rising gas.

Suitably, in a device according to the invention, the release film separates a gas-suspension mixture rising from the mixing zone along a first, lower release film side from the sludge sinking in the mud settling zone along a second, upper separation film side in the opposite direction.

From the mixing zone or from the separation zone ascending sludge that passes through the release film opening, passes over and reaches the top of the obliquely downwardly inclined release film. Ascending gas is released and passes through the separating film opening into the gas space at the top of the reactor. The overflowing suspension slides along the sloping top of the release film, which like a Degassing surface acts to obliquely downward an overflow height before it reaches the

Liquid level of the sludge settling reaches and in the bulk of the

Submerged mud settling zone. In direct contact with the gas space during the sliding along the oblique degassing surface, the overflowing suspension is released from the gas still present in the sludge.

In a preferred embodiment of the invention, in a device, the release film is movable by ascending gas bubbles.

The release film, which is made of a tear-resistant and movable material, such as a plastic film, is thereby set in motion by the ascending on its underside gas bubbles. In operation, the plastic film vibrates due to the gas bubbles, which collect on the rise of the underside of the release film and thereby enlarge. The movement also significantly improves the sludge transport at the top of the release film. At the top of the release film adhering sludge is thus reliably avoided. The sludge is conveyed down the top of the release liner continuously down into the sludge settling zone. Advantageously, the vibrating movement of the separating film is caused exclusively by the gas movement of the gas bubbles collected at the separating film bottom and thus takes place without drive.

Advantageously, in a device according to the invention in the interior of the reactor along the wall circumference, a substantially horizontally circulating clear water drainage channel is arranged level with the at least one clear water drain.

Furthermore, in an expedient embodiment of the device, the clear water drainage channel is provided with an overflow weir.

In one embodiment of the invention, the overflow weir is designed jagged and equipped with a floating sludge retention in a device. The floating sludge retention is carried out for example in the form of a baffle.

Suitably, in a device according to the invention the return sludge flow in the Schlammabsetzzone is arranged substantially level with the base circumference of the funnel-shaped release film substantially. Thus, the sludge drain is withdrawn at the lowest point of the sludge settling zone. An advantage of a device according to the invention, the circulation agitator as

Hyperboloid agitator executed.

A hyperboloid agitator is a vertical agitator with a hyperboloidal stirring element installed near the ground. Such an agitator is particularly suitable for the efficient and gentle mixing of suspensions at the same time as possible the highest possible circulation rates. Advantageously, the energy costs for operating a hyperboloid agitator are low. Appropriately, the agitator drive of

Hyperboloid agitator provided with a speed controller.

In a particularly expedient embodiment of the invention, in one device, two or more wastewater feeds are distributed uniformly over the circumference of the reactor and arranged substantially level with the bottom edge of the circulating agitator.

Advantageously, by the at least two wastewater inlets at a high circulation rate of the agitator, a uniform, particularly low concentration gradient in

Ensures wastewater feed in the mixing zone of the reactor.

In a device according to the invention, the return sludge feed is expediently provided with a flocculant auxiliary metering device.

Particularly advantageously, in a device according to the invention, the agitator shaft is provided with a Schlammbegrenzungsrührwerk, wherein the Schlammbegrenzungsrührwerk is arranged below the base circumference of the release film.

During operation, the height of the slurry is controlled by the sludge limitation agitator

Limited mixing zone. A contact sludge zone, in which sedimented sludge is re-mixed into the sludge freshly fed to the reactor, is located below the sludge limiter agitator. The Schlammbegrenzungsrührwerk can be attached both directly to the agitator shaft of the circulating agitator and coupled with this movement, as well as be controlled separately by means of a gear from Umwälzrührwerk. In the context of the invention, it is also conceivable that

Equipping the sludge limitation agitator with a separate agitator drive that is independent of the agitator agitator. Particularly in the case of a reactor for anaerobic wastewater treatment, it is necessary for all the stirrer shafts in the area of the wall penetrations through the reactor wall to have gas-tight, inertizable shaft seals.

In one embodiment of the invention, a plurality of longitudinally spaced apart from each other in a device at the periphery of the reactor

Sludge samplers are provided for sampling.

Suitably, the sludge sampling devices are located on each

different levels of the reactor and are for example as automatic

Equipped with sludge sampling devices.

In a preferred embodiment of the invention, in a device, the samples taken from the sludge sampling devices are a

Solid concentration measuring device and / or a pH value measuring device and / or a temperature measuring device and / or a pressure-measuring device and / or an analysis device can be fed.

In addition to the previously described parameters such as pH, temperature or pressure, if necessary, further relevant operating parameters can be recorded with one or more analysis devices. For example, when using the apparatus according to the invention for the anaerobic purification of industrial wastewater, it may be necessary to measure the sulphide content of the wastewater in the inlet and outlet of the reactor. As analysis device, any analysis devices are conceivable, which are suitable for an accompanying process analysis during operation of the reactor for cleaning and

Separation of gases from a suspension are in principle conceivable.

In an advantageous variant of a method for the separation of gases from a suspension with a device measuring signals of the

Solids concentration measuring device and / or the pH-value measuring device and / or the temperature measuring device and / or the pressure-measuring device and / or the

Analysis device of a control unit, in particular for adjusting a

Mud mirror supplied, wherein the control unit measuring signals in control signals for controlling at least one sludge discharge valve and / or for controlling a

Flocculation aid metering device and / or to control the number of revolutions of the agitator shaft to be converted. To adjust the sludge level in the mixing zone can vary depending on

Cleaning task different control mechanisms are used. For example, it may be sufficient to open a sludge discharge valve or to adjust the number of revolutions of the circulating agitator when the sludge level in the reactor rises. Furthermore, it may be necessary to add flocculants and / or auxiliary chemicals such as flocculants or foam suppressants to the waste water in the reactor for improved cleaning results.

In a further advantageous variant of the invention, in a method for separating gases from a suspension with a device according to the invention, measuring signals of a solids monitoring device in the clear water outlet are converted by a control unit into control signals for controlling the number of revolutions of the agitator shaft.

A device according to the invention can thus be used for the anaerobic and / or aerobic purification of a wastewater and / or for the separation of precipitation precipitates.

Depending on requirements, a device according to the invention can thus be used to clean a

Waste water selected from the group: Sulphide-containing wastewater, Waste water from the

Food processing industry, waste water from the petroleum processing industry, wastewater from the pulp industry are used.

As wastewater from the food processing industry will be exemplary

Called brewery wastewater, for their cleaning, the use of the device according to the invention is particularly advantageous.

The device according to the invention is therefore preferred for the purification of all those

Wastewater streams from industry and trade used, which have an increased chemical oxygen demand (COD), ie an increased proportion of chemically oxidizable substances, and can usually be cleaned anaerobically. Thus, the device is used particularly advantageously in anaerobic wastewater treatment for sulfate reduction.

Further details, features and advantages of the invention will become apparent from the following explanation of an embodiment schematically illustrated in the drawing. In the drawing, in a sectional view in elevation a Inventive variant of an apparatus 1 for the anaerobic purification of industrial wastewater shown.

The device 1 comprises a reactor 2, which here is designed substantially cylindrical. The reactor 2 has a diameter 3, a height 4 and a longitudinal axis 5 and defines a reactor interior 6. The reactor 2 is here made of a plastic coated on the inside with plastic. Furthermore, the reactor 2 is two

Waste water feeds 7, which open at opposite sides on the bottom circumference of the reactor 2 in the interior 6, and provided with a clear water outlet 8 and a gas outlet 9 at the top of the reactor 2. A return sludge outlet 10 and a return sludge inlet 11 are connected to an excess sludge discharge 12 to form a sludge circuit.

The reactor 2 is divided into several zones during operation: In the lower part of the interior 6 there is a mixing zone 13, in which a circulating agitator 17 is arranged and which is fully mixed during operation, ie when the agitator agitator 17 is switched on. Above the mixing zone 13, whose upper zone boundary corresponds approximately to the level of a sludge level 16 as the boundary of the fully mixed underlying reactor part, a separation zone 14 connects. In the separation zone 14, on the one hand gas and clarified liquid rise upwards and there is a first gravitational settling of sludge back into the below the mixing zone 13.

Above the mixing zone 13 and the separation zone 14 is a

Mud settling zone 15, which is separated by a separating film 21 from the mixing zone 13.

The release film 21 is here substantially funnel-shaped or cone-shaped arranged in the interior 6 and made of a multi-layer tear-resistant plastic film. The underlying mixing zone 13 or the separation zone 14 adjoin a first or lower separating film side 21.1. The second or upper separating film side 21.2 adjoins the second

Mud settling zone 15. A base circumference 22 of the separating film 21 adjoins a wall circumference 23 of the reactor 2 and is fastened thereto, for example, with a fastening ring which is not explicitly shown.

A separating film opening 24, which acts like a horizontal overflow weir, is mounted in the longitudinal axis direction 5 about a funnel height 25 of the separating film 21 in relation to the base circumference 22. A gas space 26 in which the rising through the release film opening 24 Gas is collected and which is provided with a gas vent 9 at the top of the inner space 6, connects above the release film 21 to the Schlammabsetzzone 15 at.

The release film 21 prevents unwanted short-circuit currents or

Mixtures between the mixing zone 13 and the separation zone 14 on the one hand and the sludge settling zone 15 located above the separating film 21 on the other hand. In the Schlammabsetzzone 15 there is a further settling of already degassed

Mud.

In order to ensure a gas-tight gas space 26 at the top of the interior 6, an agitator shaft 18 which drives a variable-speed agitator 19 with the

Circulating agitator 17 connects, provided in the region of the wall passage through the reactor 2 with an inertizable, gas-tight shaft seal 20. The circulating agitator 17 is designed here as a hyperboloid agitator. The motor M of the agitator drive s 19 is provided with a speed control.

Loaded wastewater, which is optionally loaded with gas and sludge, passes through the waste water inlet 7, which is arranged substantially level with the Umwälzrührwerk 17 in the lower portion of the mixing zone 13 in the reactor 2 and is thoroughly mixed in the mixing zone 13.

A sludge-limiting agitator 31, which is arranged approximately at the level of the base circumference 22 of the separating film 21, essentially serves to separate the separating zone 14 from the intensively mixed mixing zone 13 located below. The flow in the separation zone 14 is thus uniformed and sludge can thus already sediment in the separation zone 14. Due to the arrangement of the

Schlammbegrenzungsrührwerks 31 a height 32 of the contact sludge zone is set or fixed.

Rising gas-suspension mixture passes from the mixing zone 13 further into the overlying separation zone 14, in which there is a first degassing of

Mixture as well as settling mud comes. Rising gas is collected at the bottom 21.1 of the release film 21, wherein the movable release film 21 is moved back and forth in the direction 34 by the gas bubbles rising in the direction 33. By increasing gas bubbles advantageous vibration of the release film 21 is further enhanced. The gas bubbles thus rise obliquely upward along the release film underside 21.1 until they reach through the separating film opening 24 through the gas space 26 and continue to leave through the gas outlet 9, the device 1 as collected exhaust.

The separating film 21 is raised in the region of the separating film opening 24 by an overflow height 27 above the liquid level of the sludge settling zone 15. Already largely degassed suspension passes through the separating film opening 24, passes in the direction of arrow 35 and runs at the top of the release film 21, so the release film top 21.2, obliquely downward in the direction of arrow 36 from. The separating film 21 therefore forms an inclined degassing surface 27.1 for the running-off suspension before the degassed suspension reaches the liquid level of the sludge settling zone 15 and sedimentation of the sludge occurs within the sludge settling zone 15.

By the ascending gas bubbles in the direction of arrow 34 in motion or in vibration offset release film 21 are reliably sludge deposits on the

Separation film top 21.2 avoided and the sludge transport along the

Degassing surface 27.1 in the direction of arrow 36 thus significantly improved.

A on the wall circumference 23 in the interior 6 circulating clear water drainage channel 28 which is provided with an overflow weir 29 is arranged lower than the level of the separating film opening 24 to the overflow height 27. The level of the clear water drainage channel 28 determines the level of the liquid level of the sludge settling zone 15. The overflow weir 29 is executed here jagged and has a baffle as

Floating mud retention on. The clear water drainage channel 28 serves as

Collection device for the overflowing clear water leaving the reactor 2 through the clear water outlet 8. In the clear water outlet 8 a degassing pot 46 is further provided for clear water, wherein a gas manifold connects the gas space of Entgasungstopfes 46 with the gas vent 9. Thus, a gas-free clear water drain is guaranteed.

The return sludge outlet 10 is arranged at the lower edge of the Schlammabsetzzone 15 just above the release film 21. The sludge withdrawn in the course 10 is either pumped back into the mixing zone 13 in the circulation via the return sludge feed 11, or leaves the apparatus 1 via the excess sludge discharge 12. In the return sludge circulation, here in the return sludge feed 11, a flocculation aid Dosing device 30 for metering flocculation aid provided. The respectively required amount of return sludge is thus advantageously fed to the reactor 2 in the return sludge cycle. Further, at the periphery of the reactor 2, a plurality of sludge sampling apparatuses 37 for automatic sampling are arranged at different height levels. By means of a pump P are automatically sludge samples from the

Sludge sampling devices 37 optionally to one

Solid concentration measuring device 38 and / or a pH-value measuring device 39 and / or a temperature measuring device 40 and / or a pressure measuring device 41 and / or not explicitly shown further analysis facilities promoted.

Measuring signals 42 of the measuring devices 38 to 41 and the other analysis devices are supplied to a control unit 43 and converted from this into control signals 44 for controlling sludge withdrawal valves 45 for excess sludge, for controlling a metering device 47 for auxiliary chemicals and / or for controlling the number of revolutions of the agitator shaft 18 ,

Likewise, measuring signals 42 of a solids monitoring device 48 in

Clear water outlet 8 of the control unit 43 in control signals 44 for controlling the number of revolutions of the agitator shaft 18 converted.

Further embodiments of a device according to the invention, for example, especially for the aerobic purification of wastewater or for the separation of

Precipitation precipitates are suitable, are not shown here explicitly.

List of position signs:

1 device

2 reactor

3 diameter of the reactor

4 height of the reactor

5 longitudinal axis of the reactor

6 Interior of the reactor

7 wastewater intake

8 clear water drain

9 gas vent

10 return sludge drain

11 return sludge inlet

12 excess sludge discharge

13 mixing zone

14 separation zone

15 Shallow settling zone

16 mud mirror

17 circulating agitator

18 agitator shaft

19 agitator drive

20 shaft seal

21 release film

21.1 first or lower release film side

21.2 second or upper release film side

22 Basic scope of the release film

23 Wall circumference in the interior of the reactor

24 release film opening

25 funnel height of the release film

26 gas room

27 overflow height

27.1 degassing surface

28 Clear water drainage channel

29 Overflow weir of the clear water drainage channel

30 flocculant dosing device

31 Sludge limitation agitator List of position characters (continued):

32 height of the contact sludge zone

33 ascending gas (arrow direction)

34 Vibration direction of the release film (double arrow direction)

35 overflow of clear water and sludge (arrow direction)

36 Transport direction of the sludge (arrow direction)

37 sludge sampling device

38 Feststoffkonzentrichtungmes device

39 pH value measuring device

40 temperature measuring device

41 Druckmes device

42 measuring signal

43 control unit

44 control signal

45 Sludge exhaust valve for excess sludge

46 Degassing pot for clear water

47 Metering device for auxiliary chemicals

48 Solids monitoring device in the clear water outlet P Pump

M motor drive

Claims

Claims:

1. Device (1) for the separation of gases from a suspension, comprising a reactor (2) with at least one wastewater inlet (7) and at least one

Clear water drain (8) and a gas outlet (9), a return sludge outlet (10) and a return sludge inlet (11), further comprising a in his

Reactor interior (6) arranged in a mixing zone (13)

Circulating agitator (17) which is attached to a stirrer shaft (18), characterized in that in the reactor interior (6) a Schlammabsetzzone (15) by at least one release film (21) at least partially from the

Mixing zone (13) is separated.

2. Device (1) according to claim 1, characterized in that in

Reactor interior (6) the Schlammabsetzzone (15) above the at least one release film (21) is arranged.

3. Device (1) according to claim 1 or 2, characterized in that the

at least one release film (21) in the reactor interior (6) substantially

is arranged funnel-shaped, wherein a forming a smaller free cross-section separating film opening (24) relative to a base circumference (22) about a funnel height (25) is increased.

4. Device (1) according to claim 3, characterized in that the base circumference (22) of the funnel-shaped separating film (21) at least in sections to a

Wall circumference (23) of the reactor interior (6) adjacent.

5. Device (1) according to any one of claims 3 or 4, characterized in that the separating film opening (24) of the separating film (21) with respect to the Schlammabsetzzone (15) in the longitudinal axis direction (5) is increased increased.

6. Device (1) according to one of claims 1 to 5, characterized in that the

Separating film (21) from the mixing zone (13) along a first, lower separating film side (21.1) ascending (33) gas-suspension mixture of the in the Schlammabsetzzone (15) along a second, upper separating film side (20.2) in the opposite direction ( 36) separates sinking mud.

7. Device (1) according to claim 6, characterized in that the separating film (21) is movable by ascending (33) gas bubbles.

8. Device (1) according to one of claims 1 to 7, characterized in that the circulating agitator (17) is designed as a hyperboloid agitator.

9. Device (1) according to one of claims 1 to 8, characterized in that two or more wastewater inlets (7) evenly distributed over the circumference of the reactor (2) and substantially level with the bottom edge of the

Circulating agitator (17) are arranged.

10. Device (1) according to one of claims 1 to 9, characterized in that the

Agitator shaft (18) is provided with a Schlammbegrenzungsrührwerk (31), wherein the Schlammbegrenzungsrührwerk (31) below the base circumference (22) of the release film (21) is arranged.

11. The device (1) according to any one of claims 1 to 10, characterized in that at the periphery of the reactor (2) a plurality of longitudinal axis direction (5) spaced apart Schlammbeprobungsvomchtungen (37) are provided for sampling.

12. Device (1) according to claim 11, characterized in that the of the

Schlammbeproungsvomchtungen (37) taken samples of a

Solid concentration measuring device (38) and / or a pH-value measuring device (39) and / or a temperature measuring device (40) and / or a pressure-measuring device (41) and / or an analysis device can be fed.

13. A method for the separation of gases from a suspension with a device (1) according to claim 12, characterized in that measuring signals (42) of the

Solid matter concentration measuring device (38) and / or the pH value measuring device (39) and / or the temperature measuring device (40) and / or the pressure measuring device (41) and / or the analysis device of a control unit (43), in particular for adjusting a sludge level ( 16), wherein by the control unit (43) measuring signals (42) in control signals (44) for controlling at least one sludge discharge valve (45) and / or for controlling a

Flocculation aid metering device (30) and / or for controlling the

Number of revolutions of the agitator shaft (18) are converted. Method for separating gases from a suspension with a device (1) according to one of Claims 1 to 12, characterized in that measuring signals (42) of a solids monitoring device (48) in the clear water outlet (8) are converted by a control unit (43) into control signals (44 ) to control the number of revolutions of the agitator shaft (18) are converted.

Use of a device according to one of claims 1 to 12 for the anaerobic and / or aerobic purification of a waste water and / or for the separation of

Precipitation.