Where does the human waste in the lavatory of a running train go?

Question

Where does the human waste in the lavatory of a running train in EU go? Thanks

Answer 1

Trains (like planes) have a 'holding tank' where all waste water go.  When a train is at the station and boarding passengers these tanks are emptied.  Also, while in the station, the trains take on clean water for consumtion until the next station stop.

Hope this helps!

Answer 2

In the old days, right onto the track bed.  Now it's put in a holding tank and pumped out at the end of the run.