Sewage Treatment Plans Flashcards
1
Q
What is black water
A
It is waste from wcs, urinals, medical compartments and any mixed water with this waste
2
Q
What is grey water
A
Waste from bathrooms, galleys, dishwashers, laundries and sinks
3
Q
What is the regulations with regards to black water discharge at
0-4nm
4-12nm
12nm+
A
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
4
Q
What are the advantages of having an STP onboard
A
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
5
Q
Briefly explain aerobic digestion
A
Without air
6
Q
Briefly explain anaerobic digestion
A
With air produces hydrogen sulphide
