Preliminary surveys were conducted in order to change the final receiving water body of a large wastewater treatment plant (WWTP) in the town of Ferrara (Northern Italy), in the sensitive area of the Po Plane. Studies were also made in order to refit the flowsheet by means of natural polishing systems (constructed wetlands and lagooning), so as to produce a really high quality final effluent which can be locally reused for different purposes, by enhancing naturalistic properties of the local area. The present study illustrates and discusses the results of deepened environmental investigations: a prediction of the main pollutants loads reduction and their environmental impact in the two receiving water bodies (the current Po di Volano and the proposed Po River); the feasibility of a discharge in a protected area and the main design parameters for polishing treatment of a secondary effluent by natural systems (constructed wetlands and lagoons). A new index is defined in order to quickly compare achieved water quality levels by means of different polishing treatments. Finally, the main outlines of the project are presented and discussed.
New receiving body for a large wastewater plant in a sensitive area in Northern Italy: survey, refitting with natural systems and water reuse
VERLICCHI, Paola;MASOTTI, Luigi;GALLETTI, Alessio;SCHIPPA, Leonardo;
2007
Abstract
Preliminary surveys were conducted in order to change the final receiving water body of a large wastewater treatment plant (WWTP) in the town of Ferrara (Northern Italy), in the sensitive area of the Po Plane. Studies were also made in order to refit the flowsheet by means of natural polishing systems (constructed wetlands and lagooning), so as to produce a really high quality final effluent which can be locally reused for different purposes, by enhancing naturalistic properties of the local area. The present study illustrates and discusses the results of deepened environmental investigations: a prediction of the main pollutants loads reduction and their environmental impact in the two receiving water bodies (the current Po di Volano and the proposed Po River); the feasibility of a discharge in a protected area and the main design parameters for polishing treatment of a secondary effluent by natural systems (constructed wetlands and lagoons). A new index is defined in order to quickly compare achieved water quality levels by means of different polishing treatments. Finally, the main outlines of the project are presented and discussed.I documenti in SFERA sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
