| 摘要 |
<p>An apparatus and method for stabilizing sludge such as the sludge produced by municipal waste water treatment plants includes thickening of the sludge to a dry solid content in the range of 3 % to 8 % before feeding it to at least one comparatively small reactor tank (10) that extends horizontally and has an inlet (12) and outlet (14) adjacent opposite end walls (10a, 10b). The system preferably utilizes multiple tanks (10, 10, 10') stacked one above the other and connected in series. The tanks have an in-built mixer (34) that sweeps through the interior of the tank. The mixer is eccentrically mounted so that its mixing members carry the sludge through the uppermost portion of the tank interior and are spaced from the bottom surface of the tank. A sparger is located either in the inlet (22) or in the bottom clearance of the tank (24) to introduce microscopic bubbles of oxygen and ozone into the sludge. A pressure regulating valve (32) controls the flow of the stabilized sludge from the uppermost reactor tank (10'). The pressure regulating valve and the metering pump (28) together maintain a hyperbaric pressure within the tanks.</p> |
