Sewage Treatment Plans Flashcards
What is black water
It is waste from wcs, urinals, medical compartments and any mixed water with this waste
What is grey water
Waste from bathrooms, galleys, dishwashers, laundries and sinks
What is the regulations with regards to black water discharge at
0-4nm
4-12nm
12nm+
0-4nm- if IMO approved sewage treatment plan in operation
4-12nm-if IMO approved system to comminuted and disinfect the sewage in operation.
12nm+ - no treatment necessary
What are the advantages of having an STP onboard
Reduce the number of ship side openings
Simplify pipe runs
Heads and bathrooms can be lower in the ship
The ship can operate in anti pollution areas
Briefly explain aerobic digestion
Without air
Briefly explain anaerobic digestion
With air produces hydrogen sulphide