Abstract: Container wall preferably made of concrete, in particular for containers for the storage and the fermentation of fermenting agents, which in the vicinity of the upper edge has an outwardly open clamping channel with an undercut for clampingly receiving an edge of at least one film made of plastics material covering the container on the upper face, the clamping channel having a narrow, outwardly open entry slot, the height thereof being smaller than the height of an elongate insertion profile insertable into the clamping channel, around which the film may be wound, the cross-sectional dimensions of the clamping channel, the entry slot and the insertion profile being such that the insertion profile in position relative to the entry slot is insertable via said entry slot into the clamping channel and is retained against being moved out of the clamping channel when the film wound around the insertion profile is under tension, characterised in that the narrow entry slot is only defined by an upper projection, whil

Abstract: A device for regulating the gas supply in a gas storage system of a biogas system, wherein the gas storage system has gas stores connected in series in a cascade-like manner with an intermediate chamber between a gas store membrane and a protective cover. The device comprises gas supply mechanisms, intermediate chamber pressure measuring mechanisms and at least one regulating mechanism, each gas store is assigned at least one gas supply mechanism, each gas store is assigned at least one intermediate chamber pressure measuring mechanism with which the gas pressure in the intermediate chamber of the respective gas store can be measured, and the measured values of the intermediate chamber pressure measuring mechanisms are transmitted to at least one regulating mechanism, and the regulating mechanism is designed to regulate the gas pressure in the intermediate chambers of the gas stores by controlling the gas supply mechanisms assigned to gas stores.

Abstract: A container wall for storing and fermenting materials, comprising a clamping channel, having an undercut near the upper edge that is open for clampingly receiving a rim of at least one plastic foil that covers the container at the top, the clamping channel comprises a narrowed lateral insertion slot with an upper and a lower protrusion, to which the foil can be wrapped around. A lower wall of the clamping channel is wider than the thickness of the clamping rail at the facing longitudinal edge which is formed as a flat profile, the upper wall of the clamping channel is at least twice as wide as the thickness of the clamping rail. The insertion profile can be inserted into the clamping channel through the entry. When the foil that is wrapped around the insertion profile is under tension, the insertion profile is retained in the clamping channel by the protrusions.