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Castelfranco di Sotto (PI) Hazardous Waste Treatment Platform

Via Malpasso, 63 - Castelfranco di Sotto (PI)

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Herambiente Servizi Industriali

Page update 1 July 2019

    Instantaneous storage capacity
    310 tonnes of waste of which 250 tonnes of solid waste and 60 tonnes of liquid waste.
    Waste accepted
    special hazardous waste in a liquid, solid and powdery physical state, WEEE. Waste from outside the region is also authorised.

    The platform consists of the following sections:

    • storage areas;
    • treatment rooms;
    • crushing plant;
    • crushing and washing plant for plastic and ferrous materials.

    Specific waste control procedures apply both when defining contracts with customers (the 'type approval' phase) and upon accepting deliveries to the Centre.
    The compliance of the quality of the incoming waste with the corresponding approval is checked by means of visual and analytical inspections, carried out periodically and on a 'spot' basis, including collection of waste samples.
    After checking, the waste is labelled if necessary and stored in the defined areas, awaiting treatment, repackaged, recovered and sent to external plants.

    Storage method
    The waste in drums, containers or bulk is stored in separate areas according to the treatments to which they must be subjected and the hazard levels, flash point, etc. in order to ensure maximum safety for the entire facility.
    The areas used to store waste that produces gaseous fumes are confined and the vapours drawn by an exhaust ventilation system are conveyed to activated carbon purification systems.

    Waste accepted for storage can be sent to:

    • unpackaging;
    • repackaging of solid and liquid waste;
    • compacting in fixed crushing plant;
    • mixing and homogenisation;
    • disassembly of WEEE;
    • crushing and washing of plastic and ferrous materials

    All the above processes are carried out in rooms with a waterproofed floor and, depending on the need, in rooms with an exhaust ventilation system where the air drawn is sent to wet and activated carbon treatment plants.

    Liquid Waste Re-Packaging, Repackaging and Mixing
    These operations are carried out inside a booth with an exhaust ventilation system and equipped with a collection basin to contain any spills.
    Pneumatic pumps are used to ensure the safety of these operations. The air drawn in from the booth is treated by an activated carbon system.
    Liquid waste mixing operations are also authorised in this room.

    Compacting in a Fixed Crushing Plant
    Solid hazardous waste is compacted in a confined room with an impermeable floor, done to creation of mixtures for final disposal. A hydraulically-controlled, three-shaft crusher is used for this operation.
    The rooms have exhaust ventilation systems and the drawn air is treated in an activated carbon system. The rooms themselves are equipped with a specific foam fire-fighting system.

    Mixing and Homogenisation
    Mixing and homogenisation operations are also carried out in the room used for crushing; here, mixtures suitable for the various types of disposal are made.

    Disassembly of WEEE
    This takes place in a specially designated room. Before starting disassembly operations, refrigerant gases and lubricating oils are removed from the equipment containing them. Raw materials (such as ferrous and plastic materials, which are then processed in our plants) are recovered directly during and other components such as electronic boards, motor windings, monitors, capacitors, etc. are sent off for recovery.

    Crushing and Washing of Plastic and Ferrous Materials
    The plant is designed to treat 9-10 t/day of these materials and consists of the following parts:

    • single-rotor primary crusher with interchangeable grates;
    • crushed material washing system;
    • secondary crusher with interchangeable grates;
    • bagger.

    Before sending the material to be crushed, it is selected by type and quality and the treatment is designed for the specific job depending on the type of waste.
    The waste is placed in the primary crusher reducing it to coarse fragments, which are then placed in the washing tunnel where they are washed using alkaline solutions brought to a temperature of about 50 C. At the end of the washing cycle, it is rinsed with water and then dried with hot air.
    After washing, the ferrous material is stored in special boxes and sent to recovery, while the plastic material, is sent to a mill that shreds it to a fine size and from this, by means of a fan, it goes into big bags that are sent to recovery plants as secondary raw materials.
    The vapours produced during crushing and washing are drawn out and treated both in an activated carbon plant and in a two-stage wet scrubber.

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