Wastewater treatment plants are relevant energy consumers. As they carry out complex operations submitted to large variability caused by, among others, the influent and loading variations, the assessment of the performance is challenging. In this study we perform a regression analysis over a sample of 185 WWTP data in order to establish a regression model that predicts the average energy consumption of the plant given plant design and operation predictors such as the average influent flowrate, the COD loading and the plant loading factor. The regression model is also used to ascertain whether the location of the WWTP in France, Spain and Germany has an impact over the energy consumptio
