[S1 Science: Convection]
If you're wondering what it's like for your poop to be managed in Singapore, yes, we use a similar system to the one described:
Our water reclamation plants use a system similar to the one mentioned, where we treat the sewage and recycle the water that came with it. The warning signs as shown shows us how science can inform us of the dangers within the workplace.
Do be careful the next time you visit a large body of water.