Blackwater (waste) is a relatively recent term used to describe water containing Feacal matter and Urine: its is also known as "foul" water, or as sewage.
Blackwater is sewage, wastewater from toilets and medical facilities, which can contain harmful bacteria, pathogens, diseases, viruses, intestinal parasites, and harmful nutrients.
Much of this solid waste is incinerated on board, and the ash typically is discharged at sea, although some is landed ashore for disposal or recycling.
For a large cruise ship, about 8 tons of solid waste are generated during a one-week cruise.12 It has been estimated that 24% of the solid waste generated by vessels worldwide (by weight) comes from cruise ships.
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