Raw Material Recovery Tortona | Alessandria
S.R.T. SpATortona | Alessandria - Italy
- System description: Material recovery facility
- Waste processed: Commingled recyclables (paper, plastic and metals)
- Plant capacity: 4 T/hour
The plant is designed to sort recyclable materials from source-separated municipal waste.
An apron conveyor, fed by wheel loader, lifts the waste up to a horizontal conveyor belt installed under a magnetic separator which separates ferrous materials, consisting mainly in cans. A vibrating screen then separates fine materials before the waste is processed by a separator with a rotating drum made of perforated plate. Flexible materials, such as shopping bags, stick to the drum, as they are attracted by the negative pressure generated inside the drum by a ventilator. On the other hand, rigid materials that are not attracted by the drum fall into the hopper below. This equipment is able to separate aluminum cans and plastic bottles from plastic foil and paper.
On the line processing rigid materials, there is an induction separator rejecting aluminum cans from its belt. A rotor with magnets rotates at a high speed to create a magnetic field. Two variable-frequency drives are used to adjust the speed of the conveyor belt and that of the magnetic rotor. In this way, the equipment is tuned according to operational requirements. Flexible materials, i.e. paper and light plastic, are sent to a room to be sorted manually. Four materials sorted manually and a fifth, which remains on the sorting conveyor belt, are collected in containers. These materials are taken to a baler.
A second sorting room is used to sort rigid materials manually. These consist mainly of bottles and other plastic containers. The fraction remaining on the sorting conveyor is sent to a baler working in line. Both sorting rooms can be fed directly by two apron conveyors which by-pass the automatic sorting equipment set upstream of the rooms.