Shuttle Waste Management System

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Shuttle Waste Management System

• By Jason Park

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What is Shuttle Waste Management System?

• The waste management system (WMS) is an
  integrated multifunctional system primarily
  utilized to collect and process bio-wastes from
  all crewmembers in a zero gravity environment.
  The WMS is located in the middeck of the orbiter
  compartment in a 29-inch-wide area.

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Functions

• The WMS collects, stores, and dries solid wastes.
  
• The WMS processes urine, and transfers it to
  wastewater tank
• The WMS processes Extravehicular Mobility Unit
  (EMU) condensate waster from the airlock, and
  transfers it to the wastewater tank if an
  Extravehicular Activity (EVA) is required on a
  mission.
• The WMS provides an interface for venting trash
  container gases overboard.
• The WMS provides an interface for dumping
  atmospheric revitalization wastewater overboard
  in a contingency situation.

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WMS Major Components

• Commode
• Urinal
• Fan Separators
• Odor and Bacteria Filter
• Vacuum Vent Quick Disconnect
• WMS control

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Commode

• The commode contains a single multi-layer
  hydrophobic porous bag liner for collecting and
  storing solid waste. When it use, the commode is
  pressurized and transport air flow is provided by
  the fan separator. When not in use, the commode
  is exposed to vacuum for solid waste drying and
  deactivation.

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Urinal

• The urinal assembly is a flexible hose with
  attachable funnels that can accommodate both men
  and women. And it provides the capability to
  collect and transport liquid waste to the
  wastewater tank. The flexible urinal hose allows
  use while standing, sitting or floating in any
  attitude.

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Fan Separators

• The fan separators provide transport air flow
  through the commode and urinal and separate the
  waste liquid from the air flow. The liquid is
  drawn off to the wastewater tank, the air returns
  to the crew cabin through the odor and bacteria
  filter. All waste management system gases are
  ducted from the fan separator into the odor and
  bacterial filter and then mixed with cabin air.

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Odor and Bacteria Filter, Vacuum Vent Quick
Disconnect, and WMS Controls

• The Odor and Bacteria Filter removes odors and
  bacteria from the air that returns to the cabin.
• The vacuum vent quick disconnect is used to vent
  liquid directly overboard from equipment
  connected to the quick disconnect through the
  vacuum line.
• The waste management system controls have
  several valves and switches which are used to
  configure the commode for the different
  operational modes.

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WMS Restraint and Adjustment Features

• The first foot restraint (toe bar) - used for
  restraint for standup urination and this
  restraint consists of two flexible cylindrical
  pads on a shaft that can be adjusted to various
  heights by releasing two locking levers that
  turned 90 degrees counterclockwise.
• The second foot restraint - allows the
  crewmembers feet to be restrained while sitting.
  This foot restraint consists of an adjustable
  platform with detachable Velcro straps for
  securing the crewmembers feet.
• Body restraint (thigh bar) - sitting position is
  secured by lifting up each thigh bar out of its
  detent position, rotating over the thigh, and
  releasing.

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Any Questions ?