Generally wastewater treatment plants consume a huge amount of energy to feed all the electromechanical machines connected to the sections of the plant. This means a huge consumption of power and money.
To reduce management costs renewable energy sources can be used, for example solar panels or wind mills. Currently, a small number of plants in Italy use them. Another renewable source can be found directly in the same wastewater treated in the plant, with hydraulic screws.
Hydraulic screws are simple and work with small hydraulic height and a moderate amount of discharge (from 1 to 10 cubic meters per second). The machine is activated by the mass of fluid that pushes the screw.
The installation and development of these types of machines can reduce management costs of the wastewater treatment plants.