1. Sewage treatment plants: These systems treat wastewater from the vessel's toilets and sinks using various methods, such as biological treatment, chemical treatment, or membrane filtration.
2. Greywater treatment systems: These systems treat wastewater from showers, sinks, and galley kitchens using filtration and chemical treatments.
3. Oil-water separators: These devices separate oil and other hydrocarbons from bilge water before it is discharged overboard.
4. Trash compactors: These machines reduce the volume of solid waste to minimize storage and disposal costs.
5. Incinerators: These systems burn combustible waste such as paper, cardboard, and napkins.
6. Recycling systems: These systems separate and process recyclable materials such as plastic, metal, and glass.
7. Composting systems: These systems allow for organic waste, such as food scraps and yard trimmings, to be converted into compost.
8. Ballast water treatment systems: These systems treat water taken on board by ships to maintain stability and prevent the introduction of invasive species into new environments.
9. Pneumatic waste collection systems: These systems use suction to collect waste and transport it through pipes to a central collection point for disposal or recycling.
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