How is human waste taken care of on commerical aircraft? Trains, as far as I'm aware, just dump human waste on to their own tracks. There are often warnings like: DO NOT USE the toilet while the train is stopped at the station voiced through the PAs or signed up on the walls. The Daily Mail, in 2014 had an article mentioning: Train companies are to be ordered to adapt their trains to stop dumping sewage on the tracks.

I always kind of assumed that commercial airliners did the same, but I've never heard any warnings about using the restrooms aside from when the seat-belt sign is on.


How do commercial airliners take care of human waste?
Human waste from the lavatories is collected on-board and later disposed of at the airport after landing.

(Image Source: WikiMedia Commons - Author: Mnts)

Check out this related question here on Aviation.SE:
Where does my pee go when I flush at 35,000 ft?