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

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2
Q

What is grey water

A

Waste from bathrooms, galleys, dishwashers, laundries and sinks

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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

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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

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5
Q

Briefly explain aerobic digestion

A

Without air

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6
Q

Briefly explain anaerobic digestion

A

With air produces hydrogen sulphide

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