Lecture Maritime safety and security administration - Topic: Ship-source marine pollution. The following will be discussed in this topic: Ship-source sewage, sewage, ship-source garbage, air pollution from ships, air pollution,. | Lecture 5 SHIP-SOURCE MARINE POLLUTION Ship-source Sewage Sewage includes drainage from urinals and toilets, medical premises and spaces containing live animals. It varies depending on the type of ship but the general sources include galleys, baths, scuppers and bilges. A scupper is an opening in the side walls of an open-air structure, for purposes of draining water. Ships have scuppers at deck level, to allow for ocean or rainwater drainoff Sewage The discharge of raw sewage into the sea can create health hazards. When sewage is discharged in coastal areas, it can lead to oxygen depletion and obvious visual pollution which is a major problem for countries with large tourist industries. MARPOL - annex IV Sewage can be dumped when a ship: has in operation an approved sewage treatment plant and is discharging comminuted and disinfected sewage using an approved system at a distance of not less than 4 nautical miles from the nearest land; or is discharging sewage which is not . | Lecture 5 SHIP-SOURCE MARINE POLLUTION Ship-source Sewage Sewage includes drainage from urinals and toilets, medical premises and spaces containing live animals. It varies depending on the type of ship but the general sources include galleys, baths, scuppers and bilges. A scupper is an opening in the side walls of an open-air structure, for purposes of draining water. Ships have scuppers at deck level, to allow for ocean or rainwater drainoff Sewage The discharge of raw sewage into the sea can create health hazards. When sewage is discharged in coastal areas, it can lead to oxygen depletion and obvious visual pollution which is a major problem for countries with large tourist industries. MARPOL - annex IV Sewage can be dumped when a ship: has in operation an approved sewage treatment plant and is discharging comminuted and disinfected sewage using an approved system at a distance of not less than 4 nautical miles from the nearest land; or is discharging sewage which is not comminuted or disinfected at a distance of not less than 12 nautical miles from the nearest land. Ship-source Garbage Garbage from ships can be just as deadly to marine life as oil and chemicals. The greatest danger comes from plastics which can float around for years. Fish and marine life can, in some cases, mistake plastics for food and can also become trapped in plastic ropes, bags and nets. Time taken for objects to dissolve at sea Garbage type Time Plastic bottle 450 years Tin can 100 years Aluminum can 200-500 years Woolen cloth 1 year Cotton cloth 1-5 months Rope 3-14 months Painted wood 13 years Air pollution from ships The main exhaust emission pollutants are nitrogen oxides, sulphur oxides, carbon oxides and un-burnt hydrocarbon particulates. These pollutants are potentially damaging to the environment as contributors to smog and acid rain, and in the case of carbon oxides, to Greenhouse effect. Air pollution Emissions from ocean-going ships are responsible for about 60,000 deaths a
