| 摘要 |
<p>In a tank (1) there is provided a vertical channel (7) which is centrally arranged and projects through a bottom opening (6) of a sedimentation compartment (4). Bacterial decomposition of waste materials entering with the waste water into a fermentation compartment (2) through a line (3) forms gases, that is carbon dioxide and methane, which for the most part rise through an annular chamber (13) and collect above it. As a result of the waste water which is fed, a corresponding volume flows through the channel (7) and through a shroud (12) into the sedimentation compartment (4), in which the sludge sinks to the bottom (5) and is pushed through the opening (6) back into the fermentation compartment, while the purified water flows off into an overflow duct (9). The gas bubbles rising into the channel (7) generate a circulation, which makes possible the return of the sludge, without short circuit between the two compartments (4, 2), in a simple and gentle manner through the opening (6). <IMAGE></p> |
