| 摘要 |
<p>The heater (10) comprises a tank volume (11), an input connector (12) for conducting sludge into said tank volume (11), an air input connector (13) for conducting air to an aerator (14) placed in said tank volume (11), a sludge removal connector (18) for conducting sludge from the tank volume (11) to a biogas reactor (21), and a gas removal connector (20) for removing the gases generated in the tank volume (11). Substantially in the central region of the tank volume (11) has been provided an ascending space (16) along which the sludge supplied into the tank volume (11) has been disposed to move upwards. The sludge ascending in said ascending space (16) has been arranged to stay in the ascending space (16) for a delay period of sufficient length so that the oxygen present in the sludge is substantially used up. The substantially oxygen-free sludge has been arranged to flow from the ascending space (16) in an overflow (D) along a descending space (17) downward to the sludge removal connector (18).</p> |
