COMBINED INSTALLATION FOR THE PRODUCTION OF BIOGAS AND COMPOST, AND METHOD OF SWITCHING A FERMENTER IN A LIKE INSTALLATION BETWEEN BIOGAS PRODUCTION AND COMPOSTING

摘要

Combined installation for the production of biogas and compost, including at least one fermenter (2) operating according to the principle of dry fermentation for the production of biogas in the batch mode and including a biogas outlet (8) and at least one purging gas inlet (24); a biogas line (12) adapted to be connected to the biogas outlet (8); a waste gas line (26) whereby waste gas containing carbon dioxide may be supplied to the at least one purging gas inlet (24); a waste gas chimney (20) adapted to be connected to the biogas outlet (8) via a first biogas/waste gas line (14); a waste gas flare (22) adapted to be connected to the biogas outlet (8) via a second biogas/waste gas line (16); a fresh air line (28) adapted to be connected to the at least one purging gas inlet (24); a control means (30) for connecting the biogas outlet (8) to the biogas line (12) or to the biogas/waste gas chimney (20) via the first biogas/waste gas line (14) or to the waste gas flare 22) via the second biogas/waste gas line (16) and for connecting the purging gas inlet (24, 25) to the waste gas line (26) or to the fresh air line (28); and a measurement means (32, 34) connected to the control means (30) and including a first measurement sensor (32) for detecting the methane concentration and a second measurement sensor (34) for detecting the carbon dioxide concentration in the gas mixture emerging from the at least one fermenter (2).