The paper reports the results of the experimental activities carried out within a Nationa Research Project to evaluate the agronomic, envoronmental and energy sustainability of the biomass production by no-food crops irrigated with different kinds of treated wastewater. Four different research units monitored the same four main herbaceous species. physical and chemical analyses were carried out on wastewater samples. Bio-agronomical analysis on the species placed on fields were made with the goal to evaluate the main parameters sich as the productivity and the heating values. The analysis of the combustion efficiency, the amount of ash, and the environmental impact of the combustion residual was executed ina small boiler. The results highlight attractive biomass yield and an interesting crop energy capability by using treated wastewater for irrigation.