MSW Transfer station Padova
ACEGAS-APS SpAPadova - Italy
- System description: Transfer station
- Waste processed: Mixed municipal solid waste and similar waste
- Plant capacity: Two lines, 50 t/hour each
In Padua municipal solid waste collected by compactor trucks is taken to a transfer station, where waste is loaded into trailer trucks that transport it to a sanitary
landfill. Ecomaster supplied this facility turnkey; it was commissioned by AMNIUP, which later merged into Azienda Padova Servizi SpA.
The transfer station includes two identical and symmetrical lines. Each line has two large conveyors: a conveyor for receiving and storing and a second designed for receiving and lifting waste. All conveyors have rubber belts driven by chains, this type being suitable to withstand heavy wear caused by waste falling on the conveyors belts. All belts have a width of 2.5 meters to allow waste to be unloaded directly by the vehicles on the conveyors’ end.
In each line, the vehicles delivering waste can unload it directly onto the lifting conveyor or, if this is being used by another vehicle already, onto the storage
conveyor. This conveyor has adequate length and slight inclination allowing for a temporary storage of waste until the other conveyor becomes available to receive
waste and lift it. The lifting conveyors of both lines normally unload waste on trailer trucks equipped with hydraulically-driven movable floors, so the load is automatically distributed evenly over the whole length of the trailer floor, without having to move the truck. The control system of both transfer lines allows for quite a wide range of belt transfer speeds. This is enabled by the variable frequency drives of the conveyors’ motors, each of 15 kW power. Each line also has two optic barriers, consisting of photocells allowing for automatic operation of the system. If vehicles cross over an optic barrier while moving backwards toward the lifting conveyor, this stops the movement of the storage conveyor to avoid interference. A second optic barrier is set up in the final part of the storage conveyor.
The system allows for an automatic control of the forward movement of the waste piled up on the belt of the storage conveyor, so as to reduce dead times as
much as possible and increase the hourly transfer capacity, which is very high so as to deal with peak times which happen particularly in the morning, when many
vehicles come at the same time to the transfer station to deliver waste.