Last Tuesday we visited the waste water treatment plant in Gavà ( a town next to Sant Boi -Barcelona).
It was really interesting because we learned lots of important things.
A waste water treatment plant cleans sewage and water so that they can be returned to the environment. These plants remove solids and pollutants, break down organic matter and restore the oxygen content of treated water. They achieve these results through four sets of operations: preliminary, primary, secondary and sludge treatments. Normally, a network of sewers connected to homes, commercial buildings, schools and street grates delivers waste water and solids to a treatment plant's collection tanks and basins in a never-ending flow.
The most susprining thing we saw was the amount of wipes and cotton buds that arrive to the plant.
The toilet is not a trash can. We should help to keep the wastewater system working, only human waste and toilet paper should ever be flushed.
