| 摘要 |
<p>System for anaerobic treatment of fluid organic material, in particular waste generating methane, and comprising a fermentation tank (1), and a displacement tank (2) arranged at a higher level than the fermentation tank (1) and connected with a gas storage tank (3). A gas conduit (6) connects an upper portion of the fermentation tank (1) with an upper portion of the displacement tank (2). At least one connecting conduit (4) connects the fermentation tank (1) with the displacement tank (2) for transferring fluid material between said tanks. A normally closed pressure-equalising device (7) is provided in the gas conduit (6). The pressure-equalising device (7) is adapted to open without supply of external power at a given pressure difference between the fermentation tank (1) and the displacement tank (2) and subsequently to close with a given time delay.</p> |
