Marine sewage disposal

Details Marine sewage disposal Marine sewage disposal

C - Chemistry, Metallurgy

02

F

362/16

C02F 3/12 (2006.01) C02F 1/76 (2006.01) C02F 3/22 (2006.01)

Patent

CA 1131813

MARINE SEWAGE DISPOSAL Abstract 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.

351571

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