* Introduction
Sewage in a ship is divided into gray water and black water. Dumping sewage at sea while a ship
is anchored or when a ship is within a certain distance from land is strictly prohibited by law for the
protection of the environment. Discharging filthy water at sea after chemical treatment is also
prohibited, so one would require a Sewage Collection Tank to hold it until the ship is at liberty of
discharging sewage at a designated place.

* Features
- A sewage collection tank unit consists of an ejector, pumps, level switches, level gauges, valves,
  and pipes.
- A sewage collection tank unit has a role of collecting gray or black water by using its vacuum
  pumps to smash solids into pieces.
- A sewage treatment plant with a sewage collection tank unit forms a total sewage treatment
  system.

* Homepgae