Abstract: The invention relates to a fermenter vessel (1) of a biogas plant, having at least one height-adjustable agitator (8), wherein the agitator (8), in the fermenter vessel (1), is guided with a guide element (17) on a guide rail (9) oriented approximately vertically in a vertical axis direction and is held in height-adjustable fashion by means of a traction cable (10). According to the invention, a traction force measuring device (22; 25) is provided for directly and/or indirectly measuring the traction force on the traction cable (10) in accordance with a cable tension, such that, by means of the traction force measuring device (22; 25), in the case of a preferably controlled height adjustment of the agitator (8), varying traction force measurement signals are generated in accordance with varying traction forces and are supplied to an evaluation device (20).

Abstract: The invention relates to a plug flow fermenter (1) for a biogas plant, having a reactor container (2) designed as an elongated straight tube, in the reactor interior (9) of which a substrate to be fermented, preferably by dry fermentation, can be fermented as plug flow while producing biogas, wherein the reactor container (2) has at least one container inlet (10), via which the substrate to be fermented can be fed to the reactor interior (9), and at least one container outlet (12) spaced apart from the container inlet (10) in the flow direction (x) of the plug flow, via which the fermented substrate can be discharged from the reactor interior (9), and wherein a plurality of separately exchangeable agitating devices (19) is arranged spaced apart in the reactor interior (9) when seen in the longitudinal extension direction and thus in the flow direction of the plug flow.

Abstract: The invention relates to a biogas plant for fermenting organic materials and for generating biogas, having a plurality of containers and/or tanks, which form at least one slurry store (7), at least one fermenter container (8) downstream of the slurry store (7), at least one post-fermenter container (9) downstream of the fermenter container (8) and/or at least one final storage container (10) downstream of the fermenter container (8). According to the invention it is provided that the entire functional biogas plant is, as a floating biogas plant, a component of a one-part or of a multi-part connected floating body.

Abstract: The invention relates to a biogas plant fermenter tank (1) comprising a substantially liquid substrate (6) accommodated in the tank inner chamber (5) and at least one stirring device (8) arranged in the tank inner chamber (5). According to the invention, an injection device (9) having at least one delivery pump (10) which extracts the injection liquid (12), and at least one injection nozzle element (11) which is fluidically connected to the at least one delivery pump (10), is provided. The injection liquid (12) can be injected into the fermenter tank (1) by means of said injection device in such a way that the injection liquid impinges as a liquid jet (13) from above onto the surface of a floating layer (7) of the substrate (6) and wets the latter.

Abstract: A liquid substrate tank for a biogas plant includes an interior fillable with a liquid substrate and a bottom wall defining the interior on the bottom and being particularly at least regionally flat. A trough-shaped recess extending over a partial region of the bottom wall is formed in the bottom wall, to which and/or into which recess an extraction line of an extraction device is guided. The extraction device has an open-loop and/or closed-loop control device actuating the extraction device for extracting a substrate/sand mixture accumulating in the recess during operation from the recess and thus from the interior through the extraction line. The extraction device has an accommodation and/or sedimentation tank, or separator, connected to the extraction line relative to flow for accommodating or separating the substrate/sand mixture extracted through the extraction line into substrate and sand phases.

Abstract: A liquid substrate tank for a biogas plant includes an interior fillable with a liquid substrate and a bottom wall defining the interior on the bottom and being particularly at least regionally flat. A trough-shaped recess extending over a partial region of the bottom wall is formed in the bottom wall, to which and/or into which recess an extraction line of an extraction device is guided. The extraction device has an open-loop and/or closed-loop control device actuating the extraction device for extracting a substrate/sand mixture accumulating in the recess during operation from the recess and thus from the interior through the extraction line. The extraction device has an accommodation and/or sedimentation tank, or separator, connected to the extraction line relative to flow for accommodating or separating the substrate/sand mixture extracted through the extraction line into substrate and sand phases.

Abstract: A biogas plant contains a fermenter vessel, in which an assembly support is mounted, preferably vertically oriented. An assembly, in particular a submersible motor driven stirrer, is retained by a height adjustment device so as to be vertically adjustable on the assembly support. Accordingly, the height adjustment device is formed by a belt drive of which a traction device is guided around at least two deflecting elements spaced apart from one another in the longitudinal direction of the assembly support. At least one of the deflecting elements can be driven in rotation by a driving device and the assembly is coupled to the traction device in such a way that when the deflecting element is rotationally actuated in a first direction the assembly is raised and when the deflecting element is rotationally actuated in a second, opposite direction, the assembly is lowered.

Abstract: A fermenter feed system for fermentable biomass of a biogas system comprising at least one fermenter, and a delivery and treatment device located between a biomass depot and the fermenter. A mechanical cell breakdown apparatus (6) processes the biomass for delivery (5, 10, 11, 14, 34) to the fermenter (18,19) which includes an outlet opening (23) with a diameter. The diameter may be varied by an adjustable actuating member (32) according to at least one sensor (26) for detecting an operational parameter value of the cell breakdown apparatus (6) or the biomass. A diameter regulator (25) receives an output signal from the sensor as an actual parameter value and compares it to a predetermined target value (28). The actuating member (32) is activated when the actual value falls below the target value to make a predetermined change to the outlet opening diameter.