Nowadays, everything remains on-board, all thanks to a pretty complex process.

The keywords now are Teflon and Suction! Not in that particular order, though.

When we flush, a valve opens up inside which sucks up everything in the toilet bowl. It is then coated with Teflon, the material non-stick pans are made of. The waste is then moved through pipes and stored in a tank located under the aircraft. 

On landing, all the waste is transferred to a honey truck (fancy that for a name of a truck that's carrying poo) via a powerful hose

This is basically a sewage vehicle. Once all the poo is sucked out, the tanks are sanitised. The honey truck then takes the waste to its right place - the sewer. Being the operator of a honey truck might not be the dream job, but it's an important one nonetheless.



On landing, all the waste is transferred to a honey truck (fancy that for a name of a truck that's carrying poo) via a powerful hose

This is basically a sewage vehicle. Once all the poo is sucked out, the tanks are sanitised. The honey truck then takes the waste to its right place - the sewer. Being the operator of a honey truck might not be the dream job, but it's an important one nonetheless.