Patent ID: 8440437

Claim:
A combined installation for the production of biogas during a fermentation process and for the production of compost during a composting process, the combined installation comprising: at least one fermenter operating according to the principle of dry fermentation for the production of biogas in the batch mode and including a biogas outlet and at least one purging gas inlet, the fermenter configured to switch between the fermentation process and the composting process; a biogas line connected to the biogas outlet; a waste gas line whereby waste gas containing carbon dioxide may be supplied to the at least one purging gas inlet; a waste gas chimney connected to the biogas outlet via a first biogas/waste gas line; a waste gas flare connected to the biogas outlet via a second biogas/waste gas line; a fresh air line connected to the at least one purging gas inlet; a controller for connecting the biogas outlet to the biogas line or to the biogas/waste gas chimney via the first biogas/waste gas line or to the waste gas flare via the second biogas/waste gas line and for connecting the purging gas inlet to the waste gas line or to the fresh air line; and a measurement sensors connected to the controller and including a first measurement sensor for detecting the methane concentration and a second measurement sensor for detecting the carbon dioxide concentration in the gas mixture emerging from the at least one fermenter, wherein the fermenter comprises a floor plate, and in that purging gas passages connected to a second purging gas inlet are provided in the floor plate of the fermenter, and wherein the purging gas passages discharge seepage liquids seeping from a biomass during the production of biogas.