Finally, a rough estimation for the incoming
waste water can be predicted based on the statistics: at least
30000 million cubic meters of waste water is treated in the EU
every year . Therefore, the resulting energy use for treated
waste water would be not less than 13500 GW h/a, of which the
share of the aeration would then be 6750–8100 GW h/a. As the
theoretical energy savings in the presented scenarios varied
between 2.5% and 4.9%, the saved energy in the EU region WWTP
plants would equal roughly to 170–400 GW h/a.