Biogas plant digester tanks and operating procedures

Abstract

The invention relates to a biogas plant fermentation tank (1) with an interior space (3) in which a substrate (7) can be received, and with a vertical submersible equipment guide mast (17) aligned in the vertical axis direction for guiding and supporting at least one submersible equipment (26, 27) height-adjustable thereon. An opening of the fermentation tank (1) is covered by a roof (6), wherein a service device (2) forming part of the roof (6) and / or arranged in the area of ​​the roof (6) is provided, which has a walkable platform (8) as a service platform.The diving device (26, 27) can be moved into the area of ​​the roof-mounted service unit (2) by means of the height adjustment device, wherein the service unit (2) has or forms a service compartment (15) which can be closed with a cover device formed by a service housing (16) arranged above the platform plate (8), wherein the platform plate (8) has a mounting wall (13) which projects upwards from the platform plate (8) in the vertical axis direction. According to the invention, it is provided that the service housing (16) is an integral part of the mounting wall (13) and / or connects directly to the mounting wall (13), preferably towards the front in the direction of the container side wall (5).

Description

[0001] The invention relates to a biogas plant fermentation tank according to the preamble of claim 1 and a method for operating a biogas plant fermentation tank according to the preamble of claim 44.

[0002] Biogas plant digesters of this type with a service unit are known, for example, from EP 2 174 704 B1 and WO 2019 / 149891 A1. Such known biogas plant digesters with a service unit have an interior formed by a bottom wall, a surrounding side wall, and a roof, in particular a foil roof, which is gas-tightly connected to it. The interior of the tank contains a substantially liquid, fermentable substrate. The service unit comprises a service platform in the form of a walkable, level platform slab, which is gas-tightly connected to a side wall of the tank at the top and has a roof connection area to which the roof, in particular a foil roof, is gas-tightly connected. The platform slab contains a service unit that can be gas-tightly sealed by means of a cover device with a service housing that projects above the platform slab.

[0003] At least one vertically positioned submersible equipment guide mast, which extends from below through the service opening into the service housing, is supported at the bottom. A submersible device, in particular a submersible motor mixer and / or a feed pump of an injection unit, is mounted on the submersible equipment guide mast in a height-adjustable manner and can be moved out of and back into the fermenter tank through the service opening for maintenance and service work.

[0004] The submersible device guide masts of the biogas plant digester tanks of this type are designed as square tubes and can be pivoted about their vertical axes and fixed in preset pivot positions. The submersible devices are height-adjustable on the square tubes by means of slides integrated into or connected to the submersible device, which encompass the square tube. The height adjustment is generally achieved via pulleys located at the upper end of the guide mast, with arrangements of the pulleys both inside and outside the service housing being known.

[0005] On a square tube mast, only one submersible mixer, particularly a motorized submersible agitator, can practically be mounted and height-adjustable. However, achieving the necessary stirring and mixing of the substrate would often require several, especially two, submersible mixers. To obtain the required stirring and mixing of the substrate with the usual arrangement of a single submersible mixer, especially a single motorized submersible agitator on a square tube guide mast, relatively large, energy-intensive mixers with large impellers are required. This, in turn, disadvantageously necessitates a relatively large service opening through which a submersible mixer can be moved from the fermenter. Furthermore, with only one submersible mixer, variations in the control of the mixing function within the guide mast are only possible to a limited extent.

[0006] The object of the invention is therefore to further develop a biogas plant fermentation tank in such a way that structural freedom is created for the arrangement of submersible devices with reduced dimensions, combined with simplified handling and / or variations in the control of the submersible devices. A further object of the invention is to propose a suitable method for operating such a biogas plant fermentation tank.

[0007] This task is solved using the features of the independent claims. Advantageous further developments are the subject of the dependent claims.

[0008] According to claim 1, a biogas plant fermenter tank is provided with a tank interior in which a substantially liquid, fermentable substrate can be received, and with at least one vertical diving device guide mast, at least partially received in the tank interior and aligned in the vertical axis direction, for guiding and supporting at least one diving device which can be adjusted in height in the longitudinal direction of the guide mast by means of a height adjustment device.An opening of the upward-facing fermenter tank is covered by a roof, which includes a service unit forming part of the roof and / or located in the roof area. This service unit comprises a walkable platform. The at least one submersible unit can be moved into the area of ​​the roof-side service unit by means of the height adjustment device. The service unit includes or forms a service compartment, preferably in conjunction with a service opening in the platform associated with the service compartment, which can be closed with a cover, preferably an openable one. This cover is formed by a service housing located above the platform, preferably projecting upwards from the platform in the vertical direction. The platform further includes a mounting wall that projects upwards from the platform in the vertical direction, preferably in the area of ​​the service compartment.According to the invention, the service housing is an integral part of the mounting wall and / or is directly attached to the mounting wall, preferably towards the front in the direction of the container side wall.

[0009] Such a mounting wall, for example, serves as a multifunctional wall for the simple arrangement, fixing, and / or positioning of components and / or functional units on the service equipment. For instance, it can be used to fix at least a section of a roof, particularly a membrane roof. Furthermore, a section of the mounting wall that is essentially vertically oriented upwards is particularly well-suited for incorporating, for example, viewing windows similar to portholes. Additional functional units, such as a gas extraction system, an emergency gas vent, or an injection system and their associated components, can also be advantageously arranged within the mounting wall area.

[0010] A service housing can, in principle, be formed by a separate enclosure mounted on the base plate. However, this approach is relatively complex. Accordingly, the invention proposes that the service housing be or form an integral part of the mounting wall and / or connect directly to the mounting wall, preferably towards the front, in the direction of the container side wall. This achieves advantageous functional integration and component reduction simply by having a portion of the mounting wall simultaneously serve a dual function as part of the service housing. Thus, integrating the service housing into the mounting wall results in a high degree of functional integration in conjunction with a service unit, for example, a toolbox.

[0011] According to a further particularly preferred embodiment, the service housing has at least one service housing wall with a housing wall area accessible from the platform plate. Advantageously, at least part of the housing wall area accessible from the platform plate can be formed by a detachable and / or removable inclined wall, which is inclined rearward against the vertical axis towards the interior of the container, so that access to the service compartment is provided when the inclined wall is detached and / or removed. This solution not only simplifies handling when opening the service compartment, but also offers particularly advantageous access to and work within the interior of the service housing when a diving apparatus has been moved into the interior.

[0012] Accordingly, in a particularly preferred embodiment, it is advantageous if the sloping wall, in a particularly preferred configuration, slopes downwards and forwards from an upper region of the service housing, in the direction of the vertical axis, towards the platform plate. For a particularly large-area design of the sloping wall, and thus for convenient access to the service housing and therefore the service area, it is advantageous if the sloping wall extends downwards and forwards from an upper region of the service housing to the platform plate, in particular to a front edge region of a service opening on the platform plate facing away from the interior of the container.

[0013] The sloping wall can, for example, be designed as a completely removable, panel- and / or lid-like wall. Alternatively, the sloping wall can also be formed by a panel- and / or lid-like wall hinged to the service housing or in the area of ​​the service housing, possibly also to the platform plate, in the manner of a door. In the latter case, the pivoting movement can then be upwards, downwards, or to the side.

[0014] Furthermore, the diving equipment guide mast can be designed to guide and support several diving devices, the height of which can be adjusted along the guide mast by means of a height adjustment device. It can have at least two, preferably exactly two, spaced-apart guide rails extending along the guide mast, on each of which at least one diving device can be arranged in a height-adjustable manner by means of a slide. Diving devices arranged on different guide rails can be moved and / or adjusted in height independently of one another by means of the height adjustment device. This is achieved by a single diving equipment guide mast comprising a profile mast with several guide rails, on each of which one or more diving devices can be arranged, depending on the intended use and application.This means that, in conjunction with the solution according to the invention, it is always possible to arrange more than one immersion device on each carriage guide profile, or alternatively, to arrange only a single immersion device on one of the carriage guide profiles and leave the other carriage guide profiles free. For effective mixing of the substrate, it is of course generally preferable to arrange at least one immersion device on each of the carriage guide profiles, since better and more effective mixing is possible with multiple immersion devices, especially if they are arranged at different heights. Therefore, the use of multiple immersion device guide masts for arranging multiple immersion devices can be advantageously avoided.

[0015] Furthermore, this solution offers significantly greater flexibility with regard to the use of multiple submersible devices, which can not only be arranged at different heights, but can also be of different dimensions and / or orientations and / or designs, for example, on the one hand by a submersible mixer with impeller and on the other hand by a submersible pump, to give just one arbitrarily chosen example.Furthermore, for example, a submersible agitator with agitator blades can be arranged on each of the slide guide profiles, and a feed pump for an injection device, which will be explained in more detail below, can also be arranged on one of these slide guide profiles, so that in this example a total of three submersible devices are arranged on the submersible device guide mast, to give just one further example that shows the high degree of individuality and flexibility of the guide mast solution according to the invention.

[0016] Therefore, with the present invention, the selection and arrangement of several submersible devices can be easily carried out in terms of construction, manufacturing and cost, in conjunction with only a single submersible device guide mast and can be individually adapted to the specific stirring, mixing and, if necessary, injection tasks.

[0017] With such a profile mast, the submersible devices, especially the submersible mixers with their impellers, can be made comparatively smaller than a single submersible device or mixer. This also allows for a comparatively smaller service opening or service compartment, preferably with a correspondingly more compact service housing.

[0018] Preferably, the slide guide profiles are connected to each other, at least partially or in some areas, by means of at least one connecting element, viewed in the longitudinal direction of the guide mast. Specifically, the slide guide profiles can be connected to each other, viewed in the longitudinal direction of the guide mast, by means of at least one substantially continuous web as a connecting element. In this embodiment, the diving equipment guide mast is then designed in the manner of a profile support.

[0019] Alternatively, the guide profiles, viewed in the longitudinal direction of the guide mast, can also be connected to each other by means of several rods or webs as connecting elements. In this alternative embodiment, the diving equipment guide mast is then essentially designed in the manner of a truss girder.

[0020] Particularly preferably, the diving equipment guide mast has, at least in some areas, preferably at least in the adjustment range of the diving equipment, an H-profile in the form of a double-T profile, the upper and lower chords of which, connected by at least one connecting element, preferably by at least one web, form the guide profiles for the slides. This is expressly intended to include embodiments in which, for example, two dovetail longitudinal profiles or, optionally, tubes are connected along their length to form a diving equipment guide mast. The term "H-profile" is thus expressly to be interpreted in a comprehensive and broad sense, namely as a profile that forms an undercut which can be engaged by a slide from two sides.Furthermore, diving equipment guide masts designed in this way, especially as steel beams, are very stable and rigid, so that the relatively large reaction forces of a submersible motor mixer can be supported on the diving equipment guide mast without deflection and without oscillating movements.

[0021] Furthermore, according to a particularly preferred embodiment, at least one, preferably exactly one, immersion device is provided for each slide guide profile, each consisting of a stirrer with a rotary-driven agitator blade. As mentioned previously, this allows for thorough mixing and thus a very good mixing result, especially when used with smaller immersion devices. This is particularly successful when the agitator blades of the immersion devices, designed as motor-driven immersion stirrers, are aligned in the assembled state such that the axes of rotation of the blades point in approximately the same direction.

[0022] Depending on the design, a diving apparatus with its associated slide can form a single structural unit or be multi-part, particularly two-part. In the latter case, the diving apparatus can then be easily separated from its associated slide, for example, to replace the diving apparatus.

[0023] Even greater flexibility in the use of submersible equipment, and thus even better adaptation to the respective mixing tasks, is achieved with a design in which the submersible equipment, in particular a submersible motor mixer with a stirring impeller, is pivotably mounted on the associated carriage, allowing it to be pivoted upwards and / or downwards in the vertical axis direction. The pivoting range can be individually defined and is preferably, starting from the horizontal position, at least in the range of 15 to 30°. However, pivoting ranges (upwards and / or downwards) of, for example, up to 90°, again starting from the horizontal position, can also be provided. This is advantageous, for example, in conjunction with a correspondingly smaller service compartment or service opening of a service unit described in more detail below. This allows for a reduction in the size of both the service compartment and the service unit.significantly reduce the need for a service opening and thus the associated service housing.

[0024] As previously explained, the diving equipment, particularly for maintenance and servicing, can be moved to the area of ​​the roof-mounted service unit using the height adjustment device. In conjunction with such a roof-mounted service unit, maintenance and servicing work on the diving equipment can thus be carried out easily, without any significant interruption to the operation of a biogas plant or without having to enter the interior of the tank.

[0025] In the event that the interior of the fermenter tank is formed in a conventional manner by a bottom wall and a surrounding side wall, it is advantageous if the service equipment, preferably its platform plate, is connected to the side wall on the one hand, preferably in a gas-tight manner, and the service equipment has a roof connection area on the other hand, to which the roof is connected, preferably in a gas-tight manner.

[0026] The at least one diving device, which is height-adjustable and mounted on the diving device guide mast, can, as previously described, be relocated to the service room area and / or can be positioned within the service room area for access from outside. Preferably, the service room is designed and configured to allow the at least one diving device, which is height-adjustable and mounted on the diving device guide mast, to be moved out of and back into the fermenter tank through a service opening on the platform side of the service room.The latter is achieved, particularly in conjunction with several diving devices arranged on different guide rail profiles on the diving equipment guide mast, especially if the diving equipment guide mast can be pivoted about its longitudinal axis by means of a pivoting device, and in particular pivoted in such a way that diving devices arranged on different guide rail profiles can be moved into the service area in the vertical direction. Furthermore, it can preferably be provided that the diving equipment guide mast can be fixed in a set pivot position.

[0027] As the preceding explanations show, the term "service space" is to be understood in a broad sense and, in the case of the present invention, includes not only service openings in the form of hole-like recesses in the platform plate, but expressly also any space designed by the service equipment, possibly also in conjunction with such a service opening, in the area of ​​which a diving device can be moved for maintenance and service purposes and through which access to the diving device is possible, thus expressly including, for example, free spaces that arise, for instance, from a frame supporting and / or carrying the platform plate extending beyond the actual platform plate and thus allowing the diving device to be moved into this free space between the frame and the platform plate, which will be explained in more detail below.In short, the term "service space" here encompasses any open space or area equipped with service equipment, into and / or through which a diving apparatus can be moved for maintenance and service purposes. This includes not only conventional service openings, although these naturally also constitute or contribute to a service space and are thus included in the term "service space." Furthermore, the term "service opening" itself, particularly in connection with the platform plate, is to be understood broadly. It includes, but is not limited to, service openings in the form of hole-like recesses in the platform plate, but also explicitly includes edge recesses or cutouts in the platform plate itself, as will be explained in more detail later.

[0028] According to a particularly preferred embodiment, the diving equipment guide mast projects downwards into the service area when viewed in the vertical axis direction and is pivotally mounted to the service unit at its upper section (relative to the vertical axis), preferably by means of a pivot bearing of the pivoting device. This provides an overall compact design, which makes it easy to move the diving equipment into the service area as desired.

[0029] The height adjustment device can have one rotatable, preferably controlled, pulley with a pull rope for each submersible unit. This pulley is connected to the associated carriage and / or to the submersible unit. Such a pulley and pull rope arrangement allows for particularly simple and reliable height adjustment of the submersible units. For a compact design, the pulleys are arranged on the submersible unit guide mast at an upper section of the mast, relative to the vertical axis. In principle, the pulleys can be positioned outside the fermenter tank. However, this results in a relatively complex cable routing, particularly a gas-tight cable routing, from the outside into the tank interior, especially in conjunction with a swiveling submersible unit guide mast.Accordingly, it is particularly preferred that the pulleys are arranged inside the container, preferably within the service housing. Each pulley is preferably assigned a pulley drive, and it is preferably provided that the pulley drives are arranged outside the fermenter container, preferably on a pivot bearing of the submersible equipment guide mast, and are driven by the respective pulley arranged inside the container, preferably within the service housing.

[0030] Furthermore, the diving equipment guide mast can be supported at its lower end (relative to the vertical axis) on the bottom side, preferably in the area of ​​a bottom wall of the tank interior. Such a design results in a particularly advantageous lower support and stabilization of the diving equipment guide mast, characterized above all by a very high degree of operational reliability.

[0031] Furthermore, according to a particularly preferred embodiment of the invention, the mounting wall projects upwards substantially vertically in the vertical axis direction with at least one mounting wall section, and / or the mounting wall projects upwards in the vertical axis direction from a rear edge area of ​​the platform plate facing away from the side wall of the container. Such a mounting wall serves in particular as a multifunctional wall for the simple arrangement, fixing, and / or positioning of components and / or functional units on the service equipment.

[0032] According to a particularly preferred embodiment, the mounting wall in the service area, preferably in the area above a service opening formed by a recess in the edge of the platform plate, can have a mounting wall recess, so that the service housing is then open to the interior of the tank. This is preferably achieved by the service housing only partially enclosing a service opening, preferably formed by a recess in the edge of the platform plate, and remaining open to the interior of the tank. Thus, if the service housing is opened for maintenance and service work in this alternative, direct access to the gas space of the fermenter tank is provided.

[0033] Should the latter not be desired, an alternative embodiment may provide that the mounting wall runs continuously in the service area and forms a fixed rear wall or fixed rear wall area of ​​the service housing, preferably in such a way that the service housing completely encloses a service opening formed in the pedestal plate at its edges and / or connects to a service opening formed in the pedestal plate in a tube-like manner, extending upwards in the vertical axis direction.In such a design with a rear wall and a service opening formed in the base plate, where the service housing may not be open to the interior of the tank, a sealing element can optionally be provided as a gas seal. This element, arranged around the service opening and projecting downwards into the interior of the tank like a shaft, acts as a gas seal. At least during maintenance and service work, it immerses itself in the liquid substrate to be fermented in the fermenter tank and gas-tightly separates the gas phase area enclosed by the sealing element below the service opening and above the substrate from the rest of the gas phase area of ​​the interior of the tank. The sealing element can either be flexible or, preferably, be formed by a rigid, non-movable, and inflexible pipe-like collar that permanently projects from the service opening towards the interior of the tank.

[0034] According to a specific embodiment, the service housing itself can have at least one service housing wall that connects to the mounting wall to form the service housing, preferably extending forward towards the side wall of the container. For example, such a service housing wall can be single-walled and / or dome- or cupola-shaped. However, a particularly preferred embodiment is one in which the at least one service housing wall has two housing side wall sections that connect to the mounting wall at a distance from each other, preferably such that the two housing side wall sections extend away from the mounting wall.The at least one housing service wall further comprises a housing front wall area that connects the two housing side wall areas on the side facing away from the mounting wall, wherein at least a part of the housing front wall area, preferably substantially the entire housing front wall area, forms the detachable and / or removable sloping wall. This allows for a desired box-shaped structure, by means of which service and maintenance work can be carried out particularly easily and advantageously, especially when the diving equipment is relocated to the interior of the service housing.

[0035] The two side wall sections of the housing and the front wall section preferably follow the contour of a service opening on the plinth side facing them and / or directly adjoin a service opening on the plinth side facing them. This results in an overall compact and slim design for the service housing, which is easy to manufacture.

[0036] As previously stated, the mounting wall preferably has several functionalities, resulting in a high degree of functional integration, particularly in conjunction with a service unit designed as a toolbox. For example, in this context, the mounting wall can have an upper wall section, relative to the vertical axis, which is essentially horizontally oriented and / or on which the diving equipment guide mast is pivotably mounted, preferably by means of a pivot bearing. Furthermore, this upper wall section can extend essentially over the entire length of the mounting wall and have at least one connection for a functional unit, in particular for a gas exhaust and / or an emergency gas release. In addition, as previously stated, the mounting wall serves as a roof connection area for at least a section of a roof, in particular a membrane roof.According to a particularly preferred embodiment, the mounting wall has a wall section projecting upwards in the vertical axis direction from the horizontally oriented upper wall area. It is particularly preferred that the upwardly extending wall section forms a partial area of ​​a roof connection.

[0037] According to a preferred embodiment, the platform plate has a first base, preferably a longer base, facing the side wall of the container, preferably abutting the side wall of the container. The platform plate also has a second base, preferably a shorter base, opposite the first base. With this platform plate configuration, the mounting wall extends at least over the second base, preferably over the second base, and further at least partially along the sides of the platform plate towards the first base. In this case, it can optionally be provided that the mounting wall slopes downwards from the second base towards the first base, in particular downwards, to facilitate a technically simple connection of a roof, especially a membrane roof.Accordingly, the mounting wall in its general form forms at least a partial area of ​​its upper edge area a partial area of ​​a roof connection area, in particular a foil roof connection area.

[0038] Particularly in conjunction with an embodiment in which the service housing is open towards the interior of the container, the platform plate can have a recess on the rear edge of the platform plate facing away from the side wall of the container, preferably on the second base side, which forms a service opening on the platform plate side and is part of the service space.

[0039] The platform itself is preferably made of metal, but can also be made of any other suitable material that can withstand the harsh conditions of a fermenter tank, for example, a glass fiber reinforced plastic material. Furthermore, the platform is preferably essentially flat so that it is easy to walk on when assembled.

[0040] Furthermore, it is preferably provided that the platform plate is supported on its underside, relative to the vertical axis, by a frame that at least partially surrounds it, preferably by a frame that at least partially surrounds the edge. This allows for an overall stable construction.

[0041] Particularly in conjunction with a service housing that is open to the rear, towards the interior of the tank, the frame can also be designed so that a section of the frame extends beyond the rear edge of the platform plate, preferably the second base side, towards the interior of the tank. This means that the edge recess of the platform plate, or the service opening on the platform plate side, together with the space between the rear edge of the platform plate and the frame section, essentially form a single service opening and are also part of the service compartment. This results in a relatively large service opening overall, despite the compact design of the service housing, through which diving equipment can be moved into the service compartment.

[0042] The frame is preferably part of a support structure, by means of which the platform plate can also be held and / or supported against the side wall and the bottom wall of the tank. This results in a particularly reliable mounting of the platform plate and thus of the service equipment on the fermenter tank.

[0043] As previously indicated, mounting wall sections can be attached to the service housing, which is preferably located approximately in the center of the mounting wall, on both sides. Preferably, at least one mounting wall section, and preferably both mounting wall sections, has at least one viewing window shaped like a porthole. This allows for an advantageous view into the interior of the container, particularly since these mounting wall sections are set back from the service housing towards the interior of the container.

[0044] According to a further particularly preferred embodiment, the service unit comprises at least one injection device, in particular for wetting a substrate surface or a floating layer of a substrate contained within the container. This wetting of the floating layers ensures that these layers participate in the fermentation process even without being stirred into the substrate, especially when the added medium is drawn from the substrate of the fermenter container itself or alternatively or additionally from another fermenter container of an associated biogas plant. The irregular surface structure of the floating layer provides the bacteria in the liquid jet with a sufficient surface area for an effective fermentation process with a high biogas yield.

[0045] Specifically, the at least one injection device can have a pipeline that extends from the service device, preferably from the platform plate, into the interior of the container, wherein the pipeline has an injection element, preferably an injection nozzle, preferably at its free end. To ensure that the substrate surface or a floating layer can be reliably sprayed with the injection device, it is preferably provided that the injection element is positioned higher than the platform plate with respect to the vertical axis.

[0046] Specifically, the pipeline can be guided into the interior of the fermenter tank, preferably in the area behind the service equipment and / or behind the platform, most preferably behind the mounting wall, with a pipeline section coming from outside the fermenter tank, where the pipeline is then guided with a further pipeline section in relation to the vertical axis direction in order to arrange the preferably horizontally oriented injection element, preferably an injection nozzle, in relation to the vertical axis direction in the area above the platform.

[0047] In principle, the pipeline can be routed from outside the fermenter tank through the mounting wall into the tank interior. This can be advantageous, for example, if it is intended to avoid bends and thus pressure losses in the pipeline, which is preferably designed as a pressure line. Alternatively, however, a configuration can also be provided in which the pipeline, with the section coming from outside the fermenter tank, passes through the platform plate into the tank interior and from there, with at least one substantially horizontal inner pipeline section, extends further and deeper into the tank interior and into the area behind the service equipment and / or behind the platform plate, preferably behind the mounting wall, where the pipeline then, with respect to the vertical axis, is routed upwards with the further pipeline section.For example, routing the pipe through the platform plate has the advantage that a siphon function can then be easily implemented by means of an additional pipe bend in the area outside the platform plate. Furthermore, the space on the mounting wall is kept clear, allowing for the placement of additional functional units or creating space to easily view the interior of the tank through a porthole that may be installed there.

[0048] The pipeline itself can of course be designed in different ways, for example having curved and straight sections.

[0049] Furthermore, according to an advantageous embodiment, an adjustment device is provided by means of which the injection element can be pivoted within predetermined angular ranges, preferably in the vertical axis direction and / or in the transverse direction. This makes it possible to wet the substrate surface or the floating layer surface over a wide area.

[0050] Any desired substance, preferably liquid, can be injected into the interior of the tank via the injection device, causing the floating layers to be included in the fermentation. This could include, for example, substrate from another fermenter tank of a biogas plant or from another source located, for instance, in the vicinity of the fermenter tank. However, a particularly preferred embodiment includes at least one injection device with a conveying device, especially a pump, by means of which substrate can be drawn from a region of the substrate located below the substrate surface or the floating layer within the tank and conveyed via the pipeline to the injection element.

[0051] Depending on the requirements and circumstances, for example the diameter of a fermentation tank, one, possibly two or more service facilities can be provided on a fermentation tank, for example each with a platform plate and a service housing.

[0052] The following drawings illustrate the invention by way of example biogas plant digester tanks and exemplary embodiments of service facilities. The drawings show: Fig. 1 a schematic top view from an oblique angle of above of a biogas plant fermenter tank in the area of ​​a service facility according to a first embodiment, Fig. 2. Make a cut along line AA. Fig. 1, Fig. 3. Make a cut along line BB. Fig. 2 through a service housing, Fig. 4 a longitudinal section through a service housing with a diving equipment guide mast designed as an H-profile mast, Fig. 5 a representation accordingly Fig. 4 with the service housing open and the diving equipment guide mast rotated by 90°, Fig. 6 Three exemplary cross-sections of a diving equipment guide mast with two slide guide profiles, Fig. 7 A top view, obliquely from the front and above, of a service enclosure with removable / foldable side panels, Fig. 8 a schematic top view from an oblique angle of above of a biogas plant fermenter tank in the area of ​​a service facility according to a second embodiment, Fig. 9 a schematic rear view of the representation of Fig. 8, Fig. 10 an enlarged detail view of the rear view according to Fig. 9, Fig. 10a schematically a top view of the service facility with the inclined wall open, Fig. 11 an enlarged detail view of the top view according to Fig. 8, Fig. 12 an enlarged schematic representation of a submersible motor mixer which can be pivoted upwards and downwards around the carriage in the vertical axis direction.

[0053] In Fig. Figure 1 is an exemplary and schematic view from an oblique angle above a fermentation tank 1, a biogas plant in the area of ​​a service facility 2, and is shown in Fig. 2 a corresponding cut along line AA from Fig. 1.

[0054] The fermenter tank 1 has an interior space 3, which is formed by a bottom wall 4, a surrounding side wall 5, and a gas-tight roof connected to it, which here is exemplified as a foil roof 6. During plant operation, a substantially liquid, fermentable substrate 7 is filled up to the height of the side wall 5.

[0055] The service facility 2 has a service platform, which is shown here as an example of a walkable, flat platform slab 8 that is connected to the side wall 5 of the container in a gas-tight manner.

[0056] The platform 8 is further exemplified here as a metal plate, preferably made of stainless steel, with a first base 9 against the container side wall 5 and a second base 10 opposite the first base 9, which are connected by platform sides 11, 12. A mounting wall 13, projecting essentially vertically upwards, is arranged on the platform 8. This mounting wall extends over the second base 10 and slopes downwards along both platform sides 11, 12 towards the first base 9. The foil roof 6 can be connected to the upper edge regions of the mounting wall 13 and to the sloping sides of its legs.

[0057] A schematic representation shows an injection element 14 of an injection device, which protrudes through the mounting wall 13 into the interior of the container 3 and sprays the liquid substrate, which is pumped up from below from the interior of the container 3, onto a floating layer on the substrate surface.

[0058] A rectangular service opening 15a is provided in the platform 8. This opening extends along one side, preferably a longitudinal side, from the mounting wall 13 towards the first base 9 and is covered at its edge by a service housing 16, which forms a service space 15. The service opening 15a thus forms part of the service space 15. The service housing 16 and the diving equipment guide mast 17, which is designed as an H-profile mast and is housed therein, are located in the Fig. 3 to 7 are described in more detail. Fig. Figure 2 also shows a central and vertical support 18, which extends from the bottom wall 4 with an upper head section 19 above the maximum substrate level 20, wherein a plurality of support straps 21 are stretched from the head section 19 over the substrate level to the side wall areas, onto which a gas storage foil of a gas storage tank is placed when there is no or little gas filling of the gas storage tank, without immersing itself in the substrate 7.

[0059] In Fig. 3 is a section along line BB from Fig. Figure 2 shows a cross-section through the service compartment 15 from top to bottom. This reveals the H-profile of the submersible equipment guide mast 17, where the two opposing longitudinal plates are each carriage guide profiles 22, 23, on which carriages 24, 25 (schematically shown) are guided in a height-adjustable manner, engaging behind the carriage guide profiles 22, 23. Two submersible motor stirrers 26, 27 are integrally or detachably connected to the carriages 24, 25.

[0060] The H-profile mast, serving as a submersible equipment guide mast 17 for the submersible motor mixers 26, 27, projects from below through the service opening 15a into the service compartment 15 and thus into the service housing 16. It is pivotally mounted on a relatively short upper wall section 28 of the service housing 16 in a gas-tight pivot bearing 29 and in an associated pivot bearing 30 on the bottom wall 4 (pivot arrow 31), which is particularly evident from the Fig. As can be seen in Figure 4. A hand crank 32 is provided here as a manageable swivel device, but only as a general example. In practice, the swivel adjustment is preferably motor-controlled. Furthermore, a fixing device (not shown here) is preferably provided, by means of which the diving equipment guide mast 17 can be releasably fixed in a swiveled position.

[0061] The upper wall area 28 forms a component of the mounting wall 13 and projects from the mounting wall 13, wherein the upper wall area 28 is firmly connected to an upper area of ​​the mounting wall 13 with respect to the vertical axis direction, which in this area forms a fixed rear wall 13a of the service housing 16 in the embodiment shown here.

[0062] The height adjustment device for the two submersible motor mixers 26, 27 for their independent height adjustment includes, by way of example, a controlled rotary drive pulley 33, 34 for each submersible motor mixer 26, 27, which is connected to the respective submersible motor mixer 26 or 27 by a pull rope 35, 36, as can be seen in particular from the Fig. 4 and Fig. 5 is evident.

[0063] From the Fig. 4, Fig. 5, Fig. As can be seen in Figure 7, the essentially horizontally oriented upper wall section 28, which is firmly attached to the fixed rear wall 13a as part of the mounting wall 13 of the service housing 16, is shorter than the area below it of the rectangular service opening 15a. The housing front wall section opposite the fixed rear wall 13a therefore extends here as an inclined wall 37 from the front edge of the housing upper wall 28 diagonally downwards (relative to the vertical axis) and forwards (away from the mounting wall 13) to the edge of the service opening 15a, and is detachably and removablely connected there, for example, to the base plate 8 (arrow 38). Fig. 7.

[0064] If one or possibly both submersible motor mixers 26, 27 are pulled out of the interior of the container upwards into the service housing 16, safe and convenient maintenance work is possible by simply removing the sloping wall 37.

[0065] The removal of the sloping wall 37 and its gas-tight reattachment can be easily accomplished, for example, using commercially available (schematically shown) quick-release fasteners 39. Depending on the circumstances, the otherwise fixed side walls can also be folded down onto the platform plate (arrow 43) or towards the mounting wall 13 (arrow 45) using (schematically shown) hinges 42.

[0066] The possibility of independently adjusting the height of the two submersible agitators 26, 27 on the H-profile mast of the submersible agitator guide mast 17 into a maintenance position in the service housing 16 results in advantageous variations that can contribute to an optimized reduction in the size of the service facility: At the in Fig. According to the dimensions of the service opening 15a or the service space 15 shown in Figure 3, both submersible motor mixers 26, 27 can, for example, be lifted side by side into a maintenance position in the service housing 16, as is also shown in Figure 3. Fig. 4 is evident when the axes of rotation of the agitator blades of the submersible motor mixers 26, 27 are aligned longitudinally. However, if the submersible mixer 26, as shown in Fig. As shown in Figure 4, and still remaining at a height below the platform plate 8, the service room 15 could, for example, extend in length to the level shown in the Fig. The submersible motor mixer 27 is shortened along the dashed line 46, then the submersible motor mixer 27 is lowered again, the submersible motor mixer guide mast 17 is rotated by 180°, and the submersible motor mixer 26 is raised into a maintenance position. Similar positions of the submersible motor mixers 26 and 27 are shown in Fig. Figure 5 shows that in the illustrated rotational position of the submersible unit guide mast 17, the submersible motor mixer 26 would also collide with the platform plate 8 or the mounting wall 13. However, the submersible motor mixer 27 is exposed in the service housing 16 for maintenance. After maintenance, the submersible motor mixer 27 can be lowered below the platform plate 8, the submersible unit guide mast 17 rotated 180°, and the submersible motor mixer 26 pulled upwards into a maintenance position.

[0067] In the foregoing and in the figures, a diving equipment guide mast 17 in the preferred embodiment is used as an H-profile mast in the form of a double-T steel beam. Additionally, in Fig. Figure 6 shows both a cross-section with the preferred H-profile 47 (left) and other profile forms, namely a double dovetail profile 48 (center) or a double tube profile 49 (right), which may be used with similar advantages.

[0068] In the Fig. Figures 8 to 11 show an exemplary second embodiment of a biogas plant fermentation tank 1, which will only be described below insofar as it differs from the one shown in the Fig. The first embodiment shown in Figures 1 to 7 differs in that identical parts are provided with the same reference numerals.

[0069] The difference to the first embodiment lies in particular in the design of the service unit 2, which also has a platform plate 8, but whose mounting wall 13 is located in the area of ​​the service room 15, as can be seen in particular from the Fig. As can be seen in Figure 10, it has a mounting wall recess 13b, so that the service housing 16 is open towards the interior of the container 3 in this embodiment.

[0070] Furthermore, the service opening 15a is not formed by a hole-like opening in the platform plate 8, but rather by a recess at the edge of the second base side 10 of the platform plate 8. As a result, the service housing 16 only partially encloses the service opening 15a formed by the recess and is open towards the interior of the container 3. This is particularly evident from the schematic diagram of the Fig. 10a is clearly visible, in which the sloping wall 37 is also open, which also makes it very easy to see how well and easily the submersible motor mixers moved into the service room 15 are accessible from the outside for maintenance and repair purposes.

[0071] In the schematic diagrams of Fig. Figure 10a merely illustrates the case where two submersible motor mixers 26a, 26b are arranged one above the other on the slide guide profile 22, while only one submersible motor mixer 27 is arranged on the other slide guide profile 23.

[0072] Here too, the mounting wall 13 has an upper wall section 28, which in this case extends rearward away from the service housing 16. This upper wall section 28 is also essentially horizontally oriented and again serves as a bearing point for the diving equipment guide mast 17 by means of a pivot bearing 29, which has already been described in detail in connection with the embodiment.

[0073] In the embodiment shown here, each rope pulley 33, 34 is also assigned a rope pulley drive 33a, 34a, wherein the rope pulley drives 33a, 34a are arranged outside the fermenter tank 1 on the pivot bearing 29 of the diving equipment guide master 17 and are driven by the respective rope pulley 33, 34 arranged inside the tank, here inside the service housing 16.

[0074] Also unlike the first embodiment of the Fig. From 1 to 7, the upper wall area 28 extends essentially over the entire length of the mounting wall 13 and thus the second base side 10, so that the upper wall area 28 offers space for the connection of further functional units, for example, space for a gas exhaust connection 51 and for an emergency gas release connection 52. Both the storage location for the diving equipment guide mast 17 and the connection points for the other functional units are easily accessible to a worker on the upper wall area 28.

[0075] In addition, the mounting wall 13 has a wall section 53 projecting upwards in the vertical axis direction from the horizontally oriented upper wall area 28, which in the embodiment shown here forms a partial area of ​​the roof connection area.

[0076] As can be seen from the overall view of the Fig. As can be seen further in Figures 8 to 10, the platform plate 8 has a frame on its underside, at least partially circumferentially, with respect to the vertical axis, which supports the platform plate 8 from below. The frame 54 projects beyond the second base side 10, which forms the service opening 15a, towards the interior of the container 3 with a frame section 55, so that the service opening 15a on the platform plate side, together with the free space 56 between the rear edge of the platform plate and the frame section 55, essentially form a single service opening.

[0077] The frame 54 is also part of a support frame 57, by means of which the platform plate 8 is held and supported on the side wall 5 of the container. Alternatively or additionally, support on the bottom wall 5 of the container would also be conceivable.

[0078] As this can be seen from the Fig. As can be seen from Figures 8 to 11, in this embodiment, a mounting wall section 13c, 13d adjoins the service housing 16, which is arranged approximately centrally on the mounting wall 13, on both sides. This mounting wall section is set back relative to the inclined wall 37 towards the interior of the container 3 and may be equipped with viewing windows 50, for example, in the form of a porthole. As can be seen from the Fig. As can be seen only by way of example in Figure 11, such viewing windows 50 may also be arranged in the upper wall area 28 and in the wall section 53.

[0079] In this second embodiment, an injection device with an injection element 14 is again provided, wherein the injection device here has a pipeline 58 which, with a pipeline section 58c coming from outside the fermenter tank 1, passes through the platform plate 8 into the interior of the tank 3 and from there, with an inner pipeline section 58b, which runs essentially horizontally, is curved here only by way of example and is led essentially outside around the area of ​​the platform plate 8, further and deeper into the interior of the tank 3 and is led essentially centrally behind the mounting wall 13, where the pipeline 58 is then led upwards in the vertical axis direction with a further pipeline section 58c in order to arrange the injection element 14, formed by an injection nozzle and horizontally oriented, in the area above the platform plate 8.Alternatively, the inner pipe section 58b could also be, as in the . Fig. 10a is shown only in a highly schematic way, leading straight to the rear, whereby the injection element 14 is then arranged more laterally in order to avoid collisions between the submersible motor stirrers and the inner pipe section 58b.

[0080] Here again, an adjustment device 59 can be provided, by means of which the injection element can be pivoted within predetermined angular ranges, for example, within an angular range of 120°, whereby pivoting in the horizontal or transverse direction is particularly advantageous, but in principle also in the vertical axis direction. The adjustment device 59 is shown here only in a highly schematic and principle-based manner.

[0081] Otherwise, the construction, in particular with regard to the diving equipment guide mast 17, is identical to that of the first embodiment, so that reference is made to the explanations given there to avoid repetition.

[0082] As can be further seen from the schematic representation of the principles of the Fig. As can be seen in Figure 12, the submersible motor mixer 26, 27 can be pivotably arranged on the respective associated carriage 24, 25, so that the submersible motor mixers 26, 27 can be pivoted upwards and / or downwards in the vertical axis direction as required. For this purpose, it is preferably provided that a pivot bearing is formed between the submersible motor mixer 26, 27 and the associated carriage 24, 25, which is also designed such that the submersible motor mixer 26, 27 is fixed in a pivot position once set. The pivoting mechanism can, for example, be controlled externally. Reference symbol list 1 fermenter container 2 Service facility 3 Container interior 4 Container bottom wall 5 Container side wall 6 foil roof 7 Substrat 8 Platform plate 9 first basic page 10 second base page 11. Platform slab side 12 Platform slab side 13 Mounting wall 13a fixed back panel 13b Mounting wall recess 13c Mounting wall section 13d Mounting wall section 14 Injection element 15 Service room 15a Service opening 16 service housings 17 Diving equipment guide mast 18 Center support 19 Headboard 20 substrate level 21 support straps 22 Slide guide profile 23 Slide guide profile 24 sleds 25 sleds 26 Immersion mixer 27 Immersion mixer 28 Upper wall area 29 swivel bearings 30 swivel bearings 31 Swivel arrow 32 Hand crank 33 Pulley 33a Rope pulley drive 34 Pulley 34a Rope pulley drive 35 tow rope 36 tow rope 37 Sloping wall 38 Arrow 39 Quick release 40 side wall 41 Side wall 42 hinge 43 Arrow 44 hinge 45 Arrow Line 46 47 H-profile 48 Double dovetail profile 49 Double tube profile 50 viewing windows 51 connection 52 connection 53 Wall section 54 frames 55 Frame section 56 free space 57 Support frame 58 Pipeline 58a Pipeline section 58b Pipeline section 58c Pipeline section 59 Adjustment device QUOTES INCLUDED IN THE DESCRIPTION

[0000] This list of documents cited by the applicant was automatically generated and is included solely for the reader's convenience. The list is not part of the German patent or utility model application. The DPMA accepts no liability for any errors or omissions. Cited patent literature

[0000] EP 2 174 704 B1

[0002] WO 2019 / 149891 A1

[0002]

Claims

[1] Biogas plant fermenter tank, with a container interior (3) in which a substantially liquid, fermentable substrate (7) can be accommodated, with at least one vertical diving device guide mast (17) which is at least partially accommodated in the container interior (3) and aligned in the vertical axis direction for guiding and holding at least one diving device (26, 27) which is height-adjustable thereon in the longitudinal direction of the guide mast by means of a height adjustment device, wherein a container opening of the upwardly open fermenter container (1) is covered by a roof (6), wherein a service device (2) forming part of the roof (6) and / or arranged in the area of ​​the roof (6) is provided, which has a walkable platform plate (8) as a service platform, wherein the at least one diving device (26, 27) can be displaced into the area of ​​the roof-side service device (2) by means of the height adjustment device, wherein the service device (2) has or forms a service space (15), preferably in connection with a service opening (15a) in the platform plate (8) assigned to the service space (15), which can be closed with a preferably openable cover device which is formed by a service housing (16) arranged above the platform plate (8) and preferably projecting upwards from the platform plate (8) in the vertical axis direction, wherein the platform plate (8) has a mounting wall (13) which, preferably in the area of ​​the service room (15), projects upwards from the platform plate (8) in the vertical axis direction, characterized by , that the service housing (16) is an integral part of the mounting wall (13) and / or is directly connected to the mounting wall (13), preferably towards the front in the direction of the container side wall (5). [2] Fermenter tank according to claim 1, characterized bythat the service housing (16) has at least one service housing wall with a housing wall area accessible from the platform plate (8), and that at least part of the housing wall area accessible from the platform plate (8) is formed by a detachable and / or removable inclined wall (37) which is inclined backwards towards the container interior (3) against the vertical axis direction, so that when the inclined wall (37) is detachable and / or removed, access to the service space (15) is released. [3] Fermenter tank according to claim 2, characterized by that the inclined wall (37), based on the vertical axis direction, slopes downwards and forwards from an upper region of the service housing (16) in the direction of the platform plate (8). [4] Fermenter tank according to claim 3, characterized bythat the inclined wall (37), starting from an upper region of the service housing (16), extends obliquely downwards and forwards to the platform plate (8), in particular to a front edge region of a platform plate-side service opening (15a) facing away from the container interior (3). [5] Fermenter container according to one of the preceding claims, characterized by that the inclined wall (37) is designed as a completely removable, plate-like and / or cover-like wall or is formed by a plate-like and / or cover-like wall which is pivotably connected to the service housing (16) or in the region of the service housing (16) in the manner of a door. [6] Fermenter container according to one of the preceding claims, characterized byin that the diving device guide mast (17) is designed to guide and hold a plurality of diving devices whose height can be adjusted in the longitudinal direction of the guide mast by means of a height adjustment device, and has at least two, preferably exactly two, spaced-apart carriage guide profiles (22, 23) running in the longitudinal direction of the guide mast, on each of which at least one diving device (26, 27) can be arranged in a height-adjustable manner by means of a carriage (24, 25), wherein diving devices (26, 27) arranged on different carriage guide profiles (22, 23) can be displaced and / or adjusted in height independently of one another by means of the height adjustment device. [7] Biogas plant fermenter tank according to one of the preceding claims, characterized bythat the container interior (3) of the fermenter container (1) is formed by a bottom wall (4) and a circumferential side wall (5), that the service device (2), preferably the platform plate (8), is connected on the one hand to the side wall (5), preferably in a gas-tight manner, and on the other hand has a roof connection area to which the roof (6) is connected, preferably in a gas-tight manner. [8] Fermenter container according to one of the preceding claims, characterized by that the mounting wall (13) projects essentially vertically upwards in the vertical axis direction with at least one mounting wall section and / or that the mounting wall (13) projects upwards in the vertical axis direction from a rear platform plate edge region facing away from the container side wall (5). [9] Fermenter container according to one of the preceding claims, characterized byin that the mounting wall (13) has a mounting wall recess (13b) in the area of ​​the service space (15), preferably in the area above a service opening (15a) formed by an edge-side platform plate recess, so that the service housing (16) is open towards the container interior (3), preferably in such a way that the service housing (16) only partially encloses a service opening (15a) formed by an edge-side platform plate recess and is open towards the container interior (3). [10] Fermenter container according to one of claims 1 to 8, characterized bythat the mounting wall (13) runs continuously in the area of ​​the service space (15) and forms a fixed rear wall (13a) or a fixed rear wall area of ​​the service housing (16), preferably in such a way that the service housing (16) completely encloses a service opening (15a) formed in the platform plate (8) at the edge and / or is connected in a tube-like manner to a service opening (15a) formed in the platform plate (8) upwards in the vertical axis direction. [11] Fermenter container according to one of the preceding claims, characterized by that the service housing (16) has at least one service housing wall which adjoins the mounting wall (13) to form the service housing (16), preferably adjoins the mounting wall (13) towards the front in the direction of the container side wall (5). [12] Fermenter tank according to claim 11, characterized by , that the at least one service housing wall has two housing side wall regions (40, 41) which adjoin the mounting wall (13) at a distance from one another, preferably in such a way that the housing side wall regions (40, 41) extend in the direction away from the mounting wall (13), that the at least one service housing wall further comprises a housing front wall region which connects the two housing side wall regions (40, 41) to one another on the side facing away from the mounting wall, that at least a part of the housing front wall area, preferably substantially the entire housing front wall area, forms the detachable and / or removable inclined wall (37). [13] Fermenter tank according to claim 12, characterized bythat the two housing side wall regions (40, 41) and the housing front wall region follow the course of a platform plate-side service opening (15a) facing them and / or directly adjoin a platform plate-side service opening (15a) facing them. [14] Fermenter container according to one of the preceding claims, characterized by that the mounting wall (13), with respect to the vertical axis direction, has an upper wall region (28) which is oriented substantially horizontally and / or on which the diving device guide mast (17) is pivotably mounted, preferably pivotably mounted by means of a pivot bearing (29, 30). [15] Fermenter tank according to claim 14, characterized by that the upper wall region (28) extends substantially over the entire length of the mounting wall (13) and has at least one connection (51, 52) for a functional unit, in particular for a gas vent and / or an emergency gas discharge as a functional unit. [16] Fermenter tank according to claim 14 or 15, characterized by that the mounting wall (13) has a wall section (53) projecting upwards in the vertical axis direction from the horizontally oriented upper wall section (28), wherein it is preferably provided that the upwardly extending wall section (53) forms at least a partial section of a roof connection section. [17] Fermenter container according to one of the preceding claims, characterized by that the pedestal plate (8) has a first base side (9), preferably as a longer base side, which faces the container side wall (5), preferably adjoins the container side wall (5), that a second base side (10) of the pedestal plate (8), preferably as a shorter base side, is opposite the first base side (9), [18] Fermenter tank according to claim 17, characterized bythat the mounting wall (13) extends at least over the second base side (10), preferably over the second base side (10) and further at least partially along the platform plate sides (11, 12) in the direction of the first base side (9), in particular in such a way that the mounting wall (13) slopes down from the second base side (10) towards the first base side (9), in particular slopes down obliquely, and that the mounting wall (13) forms a partial region of a roof connection region, preferably a foil roof connection region, at least with a partial region of its upper edge region. [19] Fermenter container according to one of the preceding claims, characterized by that the platform plate (8) has, on the rear platform plate edge region facing away from the container side wall (5), preferably on the second base side (10), an edge-side recess which forms a platform plate-side service opening (15a). [20] Fermenter container according to one of the preceding claims, characterized by that the platform plate (8) is supported on its underside, relative to the vertical axis direction, by a frame (54) which runs around at least some areas, preferably by a frame (54) which runs around at least some areas on the edge. [21] Fermenter tank according to claims 19 and 20, characterized by that the frame (54) projects beyond the rear platform plate edge region, preferably the second base side (10), in the direction of the container interior (3) with a frame section (55) in such a way that the platform plate-side service opening (15a) together with the free space (56) between the rear platform plate edge region and the frame section (55) form a common service opening. [22] Fermenter tank according to claim 20 or 21, characterized bythat the frame (54) is part of a support frame (57) by means of which the platform plate (8) is also held and / or supported on the container side wall (5) and / or on the container bottom wall (5). [23] Fermenter container according to one of the preceding claims, characterized by that mounting wall sections (13c, 13d) of the mounting wall (13) adjoin the service housing (16), which is preferably arranged approximately centrally on the mounting wall (13), on both sides, wherein it is preferably provided that in at least one mounting wall section (13c, 13d), preferably in both mounting wall sections (13c, 13d), at least one viewing window (50) designed in the manner of a porthole is formed. [24] Fermenter container according to one of the preceding claims, characterized bythat the service device (2) has at least one injection device, in particular for wetting a substrate surface or a floating layer of a substrate (7) accommodated in the container interior (3). [25] Fermenter tank according to claim 24, characterized by in that the at least one injection device has a pipeline (58) which is guided from the service device (2), preferably from the platform plate (8), into the container interior (3), wherein the pipeline (58), preferably at the free pipeline end, has an injection element (14), preferably an injection nozzle, wherein it is preferably provided that the injection element (14), with respect to the vertical axis direction, is higher than the platform plate (8). [26] Fermenter tank according to claim 25, characterized bythat the pipeline (58) is guided with a pipeline section (58a) coming from outside the fermenter tank (1) into the tank interior (3), preferably into the area behind the service device (2) and / or behind the platform plate (8), most preferably behind the assembly wall (13), where the pipeline (58) is then guided upwards with a further pipeline section (58c) in relation to the vertical axis direction in order to arrange the preferably horizontally oriented injection element (14), preferably an injection nozzle, in the area above the platform plate (8) in relation to the vertical axis direction. [27] Fermenter tank according to claim 26, characterized bythat the pipeline (58) with the pipeline section (58a) coming from outside the fermenter tank (1) is guided through the platform plate (8) into the tank interior (3) and from there with at least one essentially horizontally running inner pipeline section (58b) even further and deeper into the tank interior (3) and into the area behind the service device (2) and / or behind the platform plate (8), preferably behind the assembly wall (13), where the pipeline (58) is then guided upwards with the further pipeline section (58c) in relation to the vertical axis direction. [28] Fermenter container according to one of claims 25 to 27, characterized by that an adjusting device (59) is provided by means of which the injection element (14) can be pivoted within predetermined angular ranges, preferably in the vertical axis direction and / or in the transverse direction. [29] Fermenter container according to one of claims 25 to 28, characterized by in that the at least one injection device has a conveying device, in particular a pump, by means of which the substrate can be withdrawn from a region of the substrate (7) accommodated in the container interior (3) located below the substrate surface or the floating layer and can be conveyed to the injection element (14) via the pipeline (58). [30] Fermenter container according to one of the preceding claims, characterized by that several service devices (2) are arranged on the fermenter tank (1).

Images