MARINE SANITATION DEVICE - TM-55-1905-222-140050

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Illustration Showing Location of Electrical System Components (Sheet 2)

TM-55-1905-222-14 Landing Craft Mechanized (LCM-8) (ROHR and Gunderson Models) (1905-01-284-2647 AND 1905-01-284-2648) Manual

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TM 55-1905-222-14

1-23 MARINE SANITATION DEVICE.

1-23.1 System Description.

a. The Marine Sanitation Device (MSD) is a modular sewage system designed to accommodate eight people

and is rated at forty gallons of sewage per day from toilets only. The system consists of four modules:

Receiving Tank, Treatment Tank, Filter-Disinfector, and Retention Canisters. The system is compatible with a

low volume flush toilet using 1 gallon maximum per flush.

b. The marine head discharges sewage into the first of four compartments in the receiving tank. Directly

above the first compartment is a bolted-on hatch cover which, when removed exposes a clean-out opening for

periodic maintenance. Three more compartments (without clean-outs) are designed to provide residence time

for anaerobic decomposition and low flow velocities for sedimentation. The compartments are separated by

dividers which also serve as weirs to control flow. After entering the first compartment, the sewage flows up

and over into the second compartment The flow is then directed down and under the next divider into the third

compartment, then up and over the last weir into the final chamber of the receiving tank.

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