DE4120143C1 - Biologically treating organically contaminated liq. - by feeding from pipes at vessel base up through central pipe into chambers contg. many pivoting plates - Google Patents

Abstract

Manure or similar organically contaminated liquid is biologically treated in a vessel (1), divided by a ring shaped wall (2) into two chambers (3,4). Manure is fed from pipes (6) at the base up through a central pipe (5) to branch pipes (8) into the chambers. Large numbers of pivoting plates (11) are provided in both chambers, in the form of screens which can pivot about axes at an angle to the angle of rotation of the stirring mechanism and are immersed in the manure transverse to flow on rotation. ADVANTAGE - Usable both with anaerobic and aerobic microorganisms and adaptable.

Description

The invention relates to a device for biological Treatment of manure or the like organically contaminated Liquid, in which one about a vertical axis in one Slurry tank with rotating agitator through the Rotation flow stirring elements is arranged.

These features are known in a slurry mixer according to the DE-OS 24 20 605. It serves to mix the contents of the container and for the destruction of sediment layers and floating layers from solids to the tank contents by a pump or to be able to transport a comparable funding. For a biological, aerobic or anaerobic treatment of the manure with This known device does not serve microorganisms. By such biological treatment of manure is used in others known facilities either a decomposition of the manure in pure water suitable for the discharge into a receiving water and otherwise usable organic solids, for example for the production of fertilizers or the extraction of methane (Biogas) aimed for, also for the introduction in a receiving water suitable pure water and biological harmless solids are obtained. Known devices  are therefore special either for the aerobic treatment of the Manure through air intake or for anaerobic treatment of the Manure designed without air intake. Some work there known processes in batch operation, especially in the aerobic / anoxic treatment for extraction of pure water and solids, for which the term "sequencing- Batch Reactor ", SBR for short, has become common, or continuously, especially in anaerobic biogas production from manure. Anaerobic gas production is also known or aerobic slurry treatment for digestion of organic solids with or without subsequent ones Drying out, for example according to DE-PS 36 15 873 or Z. Abwassertechnik, issue 9, 1990, pages 532-537.

DE-OS 33 19 276 describes a method and a Manure ventilation device. In the known after Device air nozzles are arranged at the bottom of a container, so that a certain amount of air is bubble free and another Air volume forming large bubbles at selectable intervals can be supplied in order to ensure gentle fumigation and alternatively to achieve a tube effect. A device for Manure treatment in several successive stages is over DE-OS 32 43 103 known. This arrangement is in one horizontal, all-round closed container a stirring device with stirring elements rotating around a horizontal axis intended.

The formation of settlement areas for microorganisms is known from EP-PS 02 05 465. In this publication already mentioned that the settlement areas are mobile can be arranged. However, only one is provided slight float on a seesaw. The Colonization of anaerobic microorganisms on one Carrier material is also the subject of DE-OS 30 32 869.  

The invention lies in relation to the relevant prior art the task of having a device for liquid manure treatment Microorganisms as inexpensively as possible and for treatment training different quantities in such a way that they for both aerobic and anaerobic manure treatment is usable and a specific adaptation of the Liquid manure circulation and liquid manure ventilation for the optimization of Development conditions of the microorganisms in the chosen Treatment level enables.

The invention solves this problem essentially in that the aforementioned device with features according to Characteristic of claim 1 is equipped.

This training pursues the goal of The largest possible settlement areas for Train microorganisms and use them in a way immerse the manure that the microorganisms optimal Find living and developmental conditions and that Device thus works with good efficiency. The arrangement of the swivel plates on one is preferred Bogie, which is centered around a vertical axis is rotatable by motor, the pivot axes the swivel plates with the radial of the axis of rotation include at this lagging angle. At a preferred embodiment are the swivel plates around their horizontal pivot axis movably mounted in support frame, the hanging on arms extending in a star shape Bogie are suspended. Such training results largest possible settlement areas for microorganisms on the Swivel plates. These swivel plates can then be used with a such speed and at such an angle of attack be moved through the manure that the microorganisms optimal find improved development conditions. The swivel position the swivel plates can move when the agitator is moving  adjust automatically, for which purpose, for example eccentric training in relation to the swivel axis is, or also be adjusted by motor, for which the Swivel plates receive individual drives or by Group drives are interconnected.

An improvement in the desired effect is achieved if the swivel plates cover a substantial area of the extend radial width of the container. For training the swivel plates themselves are perforated plates or latticework suitable from upright arranged flat profiles, whereby the latter one is essential compared to an imaginary level have enlarged surface on which there are microorganisms can settle.

A device in the training according to the invention is also for a multi-stage treatment in discontinuous or continuous treatment process. Is provided According to the invention, for example, a rounder plan Container that is radially divided by at least one partition is, so that an outer annulus and an inner annulus be formed. Dive into each of these annuli Support frame swivel-mounted swivel plates.

For performing aerobic treatment procedures is after a further inventive idea provided that the Air to be supplied via the support frame for the swivel plates fed and ejected via nozzles near the bottom of the container is, these nozzles partially against the tank bottom and are partially directed against the side wall of the container thereby not only the microorganisms on the Populated areas of the swivel plates, but also the themselves microorganisms nesting on the container walls to reach. A special design idea of the invention for Achieving optimal ventilation is that the  Outlet openings of the nozzles through a spring-loaded Piston valve are closed. It is achieved in that the valve is closed by the spring and thus the penetration of slurry in the air line is prevented. The valve opens only when the pressure prevailing in the supply line Spring force of the piston valve and the load on it overcomes hydrostatic head. This will then at the same time achieved the advantage that the air with very small bubbles emerges from the nozzles, the small ones Due to their low buoyancy, bubbles slowly through the Manure migrate upwards, so that a better exploitation of the Air is reached through the microorganisms.

In the preferred two-stage training of Subject of the invention to carry out a discontinuous slurry treatment using the SBR process serves the first stage of the main treatment, while in the second stage, the wastewater is beautiful, which then Has receiving water quality.

When using a two-stage training of Subject of the invention for the production of methane gas in the mesophilic in the first stage and thermophilic in the second stage be worked. The different microbial strains in both stages result in a higher gas yield.

Both when used in discontinuous and in continuous operation results in a considerable saving Energy while stirring and also when adding oxygen or optionally carbon dioxide.

Particular details of the invention result from the Subclaims.  

An embodiment of the subject of the invention is on the Drawing shown and is detailed below explained. Show on the drawing:

Fig. 1 one half of a vertical section in a radial plane through the device,

Fig. 2 in a comparison with FIG. 1 on an enlarged scale a perspective view of a supporting frame with pivot plates,

Fig. 3 is a partial plan view of the agitator of FIG. 1,

Fig. 4 is a plan view of the inner wall of a divided by a partition round container,

Fig. 5 is a schematic representation of the different pivoting positions of the pivot plates,

Fig. 6 is a side view of a drive position for the swiveling plates in a schematic Dar,

FIGS. 7 and 8 partial cross-sections of different embodiments of hinge panels,

Fig. 9 shows a cross section of a spool valve in the air outlet nozzles,

Fig. 10 is a schematic representation of a group drive for the pivot plate adjustment,

Fig. 11 is a channel for skimming a floating layer or for feeding with liquid manure,

Fig. 12 is a groove in the scooping position,

Fig. 13 is an illustration of the guidance and support of the stirrer,

Fig. 14 is an illustration of the rotary drive for the agitator,

Fig. 15 is a schematic representation of an assembly for aspirating a layer of sediment and

Fig. 16 is a schematic representation of a device for introducing and suctioning liquid.

The embodiment shows a designed for the two-stage treatment of liquid manure container 1, the interior of which is by an annular partition wall 2 divides 4 into two chambers 3 and of which the inner chamber 4 3, the inner chamber 4 encloses a central tube 5 and the outer chamber. The supply of the slurry, the circulation and the drainage of water takes place through one of the pipes 6 from below vertically upwards through the central pipe 5 via a pipe rotating connection 7 , from which branch pipes 8 lead into the chambers 3 and 4 of the container 1 . Air can also be supplied via lines 9 via the central tube 5 . The container 1 , its intermediate wall 2 and the container base 10 can be made of concrete, for example assembled from prefabricated individual elements.

In both annular chambers 3 and 4 swivel plates 11 are arranged in large numbers and advantageously evenly distributed. A support frame for these swivel plates consists of support arms 12 which extend radially outward from the center, the inner ends of which are held, for example, on the tubular rotary coupling or a dome attachment on the central tube 5 and which are supported approximately centrally with rollers 13 on the surface of the intermediate wall 2 , wherein guide rollers 14 are effective with their circumference against a vertically directed leg of a profile 15 fastened on the intermediate wall 2 as a concentric guide according to FIG. 13. For the rotary drive of the star-shaped support arms 12 , drive rollers 16 are provided according to FIG. 14, which are braced against each other by a spring mechanism and clamp the leg of the profile 15 between them. At least one of these drive rollers 16 is connected to a motor drive 17 .

On the support arms 12 in the area of both chambers 3 and 4 hanging support frame 18 ( Fig. 2) are firmly connected, in which the pivot plates 11 are pivotally mounted about a horizontal axis 19 . The swivel plates 11 extend over the substantial range of the radial width of both chambers 3 and 4 and also over the substantial range of the filling height in the chambers 3 and 4 . According to the illustrations resulting from the drawings, a plurality of swivel plates 11 can be arranged one above the other in a support frame 18 and a plurality of support frames 18 can be arranged next to one another in a chamber 3 or 4 . For the pivoting movement of the pivot plates 11 about the horizontal pivot axis 19 , a drive with a rope 20 , a chain, a belt or the like is provided, this rope 20 or the like being guided endlessly and a circular drive element 21 on each plate element and above the liquid level in the Container 1 wraps around a drive member 22 , which is adjustable by hand or motor, so that in addition to an automatic adjustment of eccentrically mounted swivel plates by the flow, a desired adjustment by drive forces is possible. In Fig. 10, a group drive a stationary storage is it shown schematically in which an approximately endlessly circulating in the area of the partition wall 2 in a horizontal direction driving means 23, a driving member 24 wraps around and on the shaft of the drive member 22 on the other hand guided over rollers 33, on have the intermediate wall 2 . Corresponding drive means for adjusting the swivel plates 11 can be provided for each row of swivel plates 11 in the chambers 3 and 4 , in order thereby to make it possible to adapt to the different peripheral speeds of the swivel plates 11 when the stirring device rotates. To achieve optimal conditions for the flow of the swivel plates 11 caused by the rotary movement, it helps if their swivel axis 19 includes an angle lagging in the direction of rotation with the longitudinal direction of the star-shaped support arms 12 , as can be seen from the top view in FIG. 3. In adaptation to the respective application of the device, the swivel plates consist entirely or partially of a lattice structure, as is shown schematically in FIG. 8, so that a large surface is formed for the settlement of microorganisms. The swivel plates 11 can also be formed entirely or partially from deformed sheet metal or plastic with depressions and elevations, so that when the swivel plates 11 are inclined, collecting spaces for rising air bubbles or the like are formed in a honeycomb structure, as the example in FIG. 7 illustrates . To support the desired effect, depressions with lateral boundaries lying approximately perpendicular to the plate plane are advantageous, as shown in FIG. 7.

Air is supplied via the spars of the support frame 18 , air nozzles 25 opening into the bottom of the container 1 and being directed partly against the container bottom 10 and partly against the container wall 1 . An inventive feature is that these air nozzles 25 have a closure member from a piston valve 27 loaded by a spring 26 in the closing direction with a piston surface acted upon by air pressure, so that this piston valve 27 not only by the spring 26 but also by the static pressure level of the Liquid above the piston valve is loaded. This has the advantage that the piston valve 27 only opens at a predetermined internal pressure which overcomes the force of the spring 26 and the static pressure level above the piston valve 27 . As a result, the air with fine bubbles escapes from the piston valve into the liquid and the fine bubbles rise at a reduced speed. Further air nozzles 28 equipped with a closure element according to FIG. 9 are arranged on the upper side of the lower support frame spar and directed upwards. In order to adapt to the process taking place in the chamber of the container 1 , the inclination of the swivel plates 11 can be set differently, as is symbolically illustrated in FIG. 5. The different stroke widths in this figure expresses that the top and the bottom of the swivel plates 11 can possibly be designed differently, so that a further adjustment to favor the process sequence in the container 1 is given.

For skimming a floating layer 34 possibly accumulating on the surface of the liquid in the container or also for loading the container with liquid manure, radially extending channels 29 are provided, which are adjustably arranged on the bogie, so that they are shown in FIG Scoop position in a rest position shown in Fig. 11 are movable. 10 guided dip tubes 30 are at the bogie also to the vicinity of the container bottom attached, are attached to the lower ends of suction nozzles 31, in order to aspirate by means of the suction nozzles 31 from the tank bottom sediments. At the same time, these suction nozzles are also suitable for ejecting liquid in order to stir up sediment layers again ( Fig. 15). Finally, a flushing pipe 32 is indicated schematically in FIG. 16, which is just as suitable for returning liquid into the container 1 as for extracting pure water from the upper region of the container. The channels 29 , the immersion tube 30 with the suction nozzles 31 and the flushing tube 32 are connected via lines and control valves to a pumping device or a comparable conveying means and can be controlled very individually, so that floating layers on the tank bottom, sediment layers return to the liquid or pure water is circulated for swirling can be. For this purpose, a pump device that is reversible in the direction of action is expedient. This results in a very varied work program of the device according to the invention, which depends on the speed of rotation, that is, the movement of the swivel plates through the liquid, the angle of inclination of the swivel plates, the choice of the structure of the swivel plates for colonization with microorganisms, the varied air regulation, the whirling any sediment up to the suction and return of a possible floating layer is sufficient. The manure only moves very little, in which the microorganisms that settle on the wall surfaces of the container and other stationary or floating parts are still adequately supplied with food. It is of major advantage that the versatile controllability of the individual device elements means that essentially the same speed of movement can be achieved in all areas of the liquid. Turbulence to improve the desired effect can be desired and achieved at predetermined locations through the niche-shaped surfaces of inclined swivel plates, so that such turbulence has a positive effect on the life behavior of the microorganisms. The flake-like communities of microorganisms formed in this way attach themselves to the settlement areas and are driven off again by the flow resulting from the stirring movement. At the end of a discontinuous process step, the swivel plates can be brought into a vertical rest position so that the microorganisms are no longer fed and their multiplication stops. This leads to an increase in flakes and sedimentation. These sediments fall onto the bottom of the container and can be sucked out of the container via the immersion tubes 30 with the suction nozzles. In this way, an SBR product is achieved, which results in a valuable fertilizer due to its high protein content. In particular, the high vitamin and protein content of the SBR product has an advantageous effect on the large and small formation of seeds, so that it can be used as a seed incrustation agent. Damage to erosion on the fields is reduced, as is contamination of the groundwater.

When methane is prepared, the proportion of nitrogenous Connections are not affected, so that the nitrogen of the Plant is immediately available.

Manufacture of the device, in particular the container, the support arms and the support frame for the swivel plates in one Modular design also facilitates the adaptation of a device the features of the invention to different operating conditions and above all to different throughputs, which makes the Use of the device not only in farms, but also for large companies with factory farming is guaranteed.  

Reference symbol list

1 container
2 partition
3 chamber
4 chamber
5 central tube
6 pipeline
7 rotary pipe coupling
8 branch line
9 air line
10 container bottom
11 swivel plate
12 support arm
13 roller
14 Leadership role
15 profile
16 drive roller
17 drive
18 support frame
19 axis
20 rope
21 drive element A
22 drive element B
23 drive means
24 drive element
25 air nozzle
26 spring
27 piston valve
28 air nozzle
29 gutter
30 dip tube
31 suction nozzle
32 flushing pipe
33 roll
34 floating layer

Claims (23)

1. A device for the biological treatment of liquid manure or the like organically contaminated liquid, in which a stirrer rotating about a vertical axis in a container holding the liquid manure is provided with stirring elements against which the rotation flows, characterized in that the stirring elements are arranged by sieve-like, around axes ( 19 ) pivoting plates ( 11 ) which are arranged so as to be movable at an angle to the axis of rotation of the agitator and which plunge into the slurry approximately transversely to the flow when the agitator rotates. 2. Device according to claim 1, characterized in that the swivel plates ( 11 ) on a centrally in a round container ( 1 ) about a vertical axis motor-rotating bogie ( 12 , 18 ) to pivot axes ( 19 ) are movably mounted with the radial of the axis of rotation of the bogie enclose an angle lagging in the direction of rotation. 3. Device according to claims 1 and 2, characterized in that the pivot plates ( 11 ) on themselves above the container ( 1 ) rotating support arms ( 12 ) of the bogie and pivotally mounted in support frames ( 18 ) which are from above in the Immerse the manure. 4. Device according to claims 1 to 3, characterized in that the swivel plates ( 11 ) have a lattice-like structure with an enlarged surface for the settlement of microorganisms. 5. Device according to claims 1 to 4, characterized in that the pivot plates ( 11 ) extend over a substantial range of the radial width of the container ( 1 ). 6. Device according to claims 1 to 5, characterized in that the pivot plates ( 11 ) are formed eccentrically to their pivot axis ( 19 ). 7. Device according to claims 1 to 6, characterized in that the swivel plates ( 11 ) have an adjustment drive for adjusting the angle of attack during the rotation of the swivel plates ( 11 ) in the container ( 1 ). 8. Device according to claims 1 to 7, characterized in that a plurality of pivot plates ( 11 ) one above the other in a vertically extending in the container ( 1 ) extending support frame ( 18 ) and the support frame ( 18 ) hanging on star-shaped extending support arms ( 12 ) a bogie mounted in the middle are attached. 9. Device according to claims 1 to 8, characterized in that the container is radially divided by at least one intermediate wall ( 2 ), so that an outer annular chamber ( 3 ) surrounds an inner annular chamber ( 4 ), and that on the support frame ( 18 ) pivotally mounted pivot plates ( 11 ) are arranged in each of the two chambers ( 3 , 4 ). 10. Device according to claims 1 to 9, characterized in that between the support frame ( 18 ) for swivel plates ( 11 ) height-adjustable channels ( 29 ) for skimming floating layers ( 34 ) are arranged on the bogie. 11. Device according to claims 1 to 10, characterized in that between the support frame ( 18 ) for swivel plates ( 11 ) in the vicinity of the container bottom ( 10 ) suction nozzles ( 31 ) are provided for the suction of sediment layers deposited on the container bottom ( 10 ). 12. Device according to claims 10 and 11, characterized in that the channels ( 29 ) and the suction nozzle ( 31 ) above the container bottom ( 10 ) are individually connected to each other by lockable pipelines, with a pump device and drain lines. 13. The apparatus according to claim 12, characterized in that the pumping device is reversible in the direction of action. 14. The device according to one or more of the preceding claims, characterized in that air nozzles ( 25 , 28 ) are provided at the lower ends of the support frame ( 18 ) for the swivel plates ( 11 ). 15. The apparatus according to claim 14, characterized in that the air nozzles ( 25 , 28 ) by a spring ( 26 ) loaded closure member from a piston valve ( 27 ) and this has an applied by the air pressure in the nozzle in the opening direction of the closure member piston surface. 16. The apparatus according to claim 14, characterized in that air nozzles ( 25 ) are directed at the lower end of the support frame ( 18 ) against the bottom ( 10 ) of the container ( 1 ) and against the lateral container wall. 17. The device according to one or more of the preceding claims, characterized in that the liquid and air lines ( 6 , 9 ) arranged in a central tube ( 5 ), fed from below and by means of rotatable couplings ( 7 ) one on the central tube ( 5 ) arranged domes are individually connected to radially protruding manifolds or connecting pipes. 18. The apparatus according to claim 7, characterized in that the pivot plates ( 11 ) are individually and jointly adjustable by an adjusting drive. 19. The device according to one or more of the preceding claims, characterized in that the swivel plates ( 11 ) have depressions instead of through openings at least on one side of the plate. 20. The apparatus according to claim 19, characterized in that the depressions have lateral boundary surfaces that lie approximately perpendicular to the plate surface. 21. The apparatus according to claim 8, characterized in that the support arms ( 12 ) of the agitator, on which the pivot plates ( 11 ) are arranged hanging in the support frame ( 18 ), with rollers ( 13 ) on the top of the outer container wall or Support the partition ( 2 ). 22. The apparatus according to claim 21, characterized in that the rollers ( 13 ) are at least partially connectable to a motor drive ( 17 ). 23. The device according to claim 21, characterized in that a motor drive ( 17 ) is provided, in which two mutually sprung drive rollers ( 16 ) a vertically upward leg of a profile on the upper container edge, in particular an intermediate wall ( 2 ) attached ( 15 ) clamp between them.