What Happens After You Flush on a Cruise Ship


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What Happens After You Flush on a Cruise Ship



These days, any cruise ship is like a huge city, where every detail is thought out so that passengers feel just as comfortable as on land, only better. You can take a shower, do the laundry, or swim in a pool. But where does all the dirty water go?

The average ship spends about 40-50 gallons of water per passenger every day. It makes tons of wastewater that needs to be utilized. Say, the world’s biggest cruise ship, Harmony of the Seas, can carry about 5,500 passengers together with 2,300 crew members. They produce about 312,000 gallons of wastewater daily!

Other videos you might like:
12 Things You Should Never Flush Down the Toilet https://www.youtube.com/watch?v=FJ5k–ucOuU&
13 Things You Shouldn’t Dump Down the Drain https://www.youtube.com/watch?v=VsMi0u6Li4M
Are Public Toilets As Safe As You Think? https://www.youtube.com/watch?v=o1LHIlhR6zo&

TIMESTAMPS:
Greywater and blackwater 1:16
How wastewater gets cleaned 1:28
Why you shouldn’t take water from one ocean and throw it into another 2:42
What about other kinds of waste? 3:55
Where does all the water on the ship come from? 6:14

#ships #howitworks #brightside

SUMMARY:
– Even though the passengers don’t notice, the water supply system onboard the ship is designed to use the water sparingly.
– And still, the average ship spends about 40-50 gallons of water per passenger every day.
– Greywater comes from laundry, showers, baths, and kitchens. Blackwater comes from bathrooms.
– The highest volume of wastewater comes from greywater. It gets mixed with some of the blackwater and is sent to the bio-reactor.
– Chlorine and other chemicals aren’t used since they’re bad for the sea’s eco system.
– The solid waste that was filtered at the first stage is kept in special tanks until the ship arrives at the harbor where it’ll be utilized.
– Scientists have noticed that ballast water taken from one ocean and thrown into another is bad for the ecosystem.
– The species of plankton and other sea inhabitants vary in different oceans, and the “strangers” can start destroying the “natives”.
– Sensitive detectors measure the level of oil in the water, and if it’s even a bit higher than what’s allowed, the water is sent for cleaning again.
– There’s special staff on board every ship who sort out the garbage into 4 categories – food waste, paper, metal and glass, and plastic.
– Most of the food waste is considered natural: it doesn’t do any harm to the sea’s ecosystem.
– Household waste, cooking grease, and solid waste are kept on board until the ship arrives at the harbor and is utilized there.
– Metal and glass are just thrown overboard. Surprised? These two just drop to the bottom and do no harm to the sea.
– Strict rules also apply to the passengers themselves. On every deck of a cruise ship, there are usually special instructions that forbid them from throwing anything overboard themselves.
– Turns out, all cruise ships have desalinating plants. When the ship goes farther than 25 miles from the land, they take seawater, which goes through a many-layered filter, a powerful ultra-violet lamp, and a desalinator.
– The desalinating plant is the size of a room and gives enough fresh water for all the passengers and crew.

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29 Comments

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  1. Instead of making a 7minute long video to answer a very very simple question just say that  when you flush the toilet, the sewage goes straight to the on-board treatment plant which treats it until it's drinkable and then pumped back into the ocean, far away from land.

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