TM 55-1925-284-14&P
OPERATOR, UNIT, DIRECT SUPPORT, AND GENERAL SUPPORT MAINTENANCE
MARINE SANITATION DEVICE FOR
INLAND AND COASTAL LARGE TUG (LT)
EQUIPMENT DESCRIPTION AND DATA
EQUIPMENT CHARACTERISTICS, CAPABILITIES, AND FEATURES
The Marine Sanitation Device (MSD) biologically oxidizes the organic matter in sewage and produces a clear
odorless effluent. The MSD is comprised of a media tank, a chlorinator, wet well, discharge pump, blower, and
miscellaneous gauges, valves, and piping. The technical characteristics of these components are detailed in the
Equipment Data paragraph in this work package. Theory of operation is outlined in WP 0003 00.
LOCATION AND DESCRIPTION OF MAJOR COMPONENTS
1
2
3
4
5
Figure 1. Major MSD Components
1. Chlorinator (figure 1, item 1). The tablet chlorinator is mounted between the spillover outlet of the media tank
and the inlet to the wet well. This is a demand type chlorination system with no moving parts.
2. Discharge Pump (figure 1, item 2). The discharge pump automatically expels treated water overboard as the
water level in the wet well rises.
3. Media Tank (figure 1, item 3). The tank stores and treats all waste matter produced aboard the vessel.
Biological oxidation of sewage organics occurs within the tank as air lifts circulate the sewage and transfer
oxygen into the water.
0002 00-1
