| 摘要 |
<p>MARINE SEWAGE DISPOSAL An activated sludge marine sewage disposal apparatus includes an aeration chamber immediately adjacent to a flooded settling tank, rising above a disinfectant chamber and a holding chamber disposed around the lower part of the tank. Flow from the aeration chamber to the settling tank is through a port in the common wall between the aeration chamber and settling tank, and up inside a pond separated from the rest of the tank by a downwardly flaring baffle or skirt depending from the top of the tank. A single skimmer at the center of the area at the top of the pond picks up floating solids and returns them to the top of the aeration chamber. A vent disposed directly over the skimmer continuously draws off air and gas to the aeration chamber. A sludge return line picks up heavy solids from the bottom of the tank and returns them to the top of the aeration chamber through a riser located in the aeration chamber Liquid in the settling tank flows out through a submerged perforated pipe into a standpipe in the aeration chamber, which is located centrally in the aeration chamber and overflows through an inverted-U tube, vented to the aeration chamber, the tube connecting to a downcomer sending the liquid back through the common wall to the disinfectant compartment. When sufficient volume of fluid accumulates in the disinfectant compartment, it overflows into a holding tank, from which it emerges via a port.</p> |
