| 摘要 |
A fermentation plant with at least one digester (1) is supplied with a substrate (1a) that is percolated using a percolate (2a) from a percolate container (2) and biogas that is generated via the percolation process in the digester (1) or/and in the percolate container (2) is drawn off. The drawn off biogas is treated in a biogas treatment device (3) and CO2-containing exhaust gas that is generated during the treatment is introduced into the substrate (1a) in the digester (1) using a purge line (4), for forcing out the biogas in the substrate (1a). CO2-containing biogas that was generated in an additional digester (1) in a different fermentation process can be introduced into the substrate (1a) in the digester (1) using a purge line (4). The CO2-containing purge gas supplied to the substrate (1a) is forced to pass through the substrate (1a) dislodging any trapped biogas. |
