What do cruises do with toilet waste?

What happens to sewage from cruise ships? Black water, that is what gets flushed down toilets, is processed on board. After processing, the solids are separated out and off loaded and disposed of on shore. The water, which after processing is potable grade, is returned to the sea.



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Cruise ships are only permitted to release human wastewater that has been heavily treated. Solid waste is also treated and dehydrated but not released into any open body of water. Instead, it is disposed of through standard, onshore waste disposal methods once the cruise ship is in port.

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When a toilet is flushed on a cruise ship, the sewage travels to the onboard treatment plant. Here the waste is filtered before it enters an aeration chamber. The aeration chamber cleans the waste. It is then sterilized using UV light and released into the ocean when clean enough to do so.

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Since its inception 30 years ago, through our Save the Waves program, we process our waste through a rigorous waste management program. All of our ships are equipped to be landfill-free, with processes in place to keep every waste stream we produce out of local landfills.

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The food is blended with water until it's a smooth mixture and then either disposed of in port, incinerated, or pumped out to sea when the ship is deep water and away from the coastlines. Simple as that.

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If you wonder whether cruise ships have jails, the answer is yes. Jails are called brigs on a cruise ship and tend only to be used in serious circumstances when no other options are available. Cabin arrest is typically used before the brig is needed.

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In the USA, staff were instructed to lock toilets when the train was stopped in a station and unlock them when the train was again underway. Mercifully, new trains no longer dump waste on the tracks. Instead, trains are fitted with chemical holding tanks.

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Water is a precious resource onboard a cruise ship, so modern ships save gallons with each flush by using a vacuum system. The sounds your toilet make include a scary whoosh (unfortunately, loud enough to be heard in the hallways) followed by a series of thumps as valves in the system close.

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The most polluting cruise ships operator was MSC Cruises – whose cruise ships emitted nearly as much SOx as all the passenger vehicles in Europe. Accounting for all of its subsidiaries, the Carnival group polluted the most. Many cruise operators like MSC are investing in fossil gas (LNG) as a cleaner alternative.

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The truck plugs a hose into the airplane's waste tank valve and removes all of the waste into the tank on the back of the truck. The truck then takes the waste to a special area at the airport reserved for the waste from all aeroplanes, and the toilet waste is emptied into the sewer system for that airport.

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Yes, there are morgues on most of the world's largest cruise ships. The larger the ship, the larger the morgue's capacity. Vessels are also required to carry body bags.

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A majority of cruise ship lines offer their employees free food throughout the duration of their contracts. There's typically a special kitchen on the boat that prepares food for staff members. Employees may eat in separate dining areas, depending on their classifications.

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Most cruise ship workers work long hours—eight- to 14-hour days, seven days a week are not uncommon. Many employees spend a number of weeks, usually five or more, working at sea, followed by an extended leave ashore. Being a people person is important in this industry.

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Depending on the experience of the captain and other factors, a new captain may make around $50,000 per year while the most experienced captains for the biggest cruise lines can make around $190,000 per year.

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