Via Fiocinini (no number), Ostellato (FE)
The composting plant is located on via Fiocinini in the Valle Mezzano area of the municipality of Ostellato (FE), and is authorised to carry out the following activities:
Page updated 26 August 2015
The production process of the Ostellato composting plant can be broken down into five main stages:
1 - Waste delivery. All vehicles entering the site must first pass through the weighing station, where the incoming flows are recorded and the deliverer´s authorisation to enter the site is checked, along with the relevant transport documents and permits. The waste is then unloaded in the designated storage areas and, before treatment, is divided into categories of unseparated municipal waste, decomposable organic fraction (DOF) and lignocellulose fraction.
2 - Pre-selection of municipal waste. Unseparated municipal waste unloaded into the storage pit of the selection plant is picked up by a bucket crane, which transfers it to the selection plant. It is then ground in a suitable machine operating on an automatic cycle which transports it, on a conveyor belt, to the screening stage. This stage is performed by an automatic rotating screen, which selects the waste on the basis of its size. This initial selection produces two types of waste: a dry fraction and a wet fraction or OFMSW (Organic Fraction of Municipal Solid Waste). The dry fraction first undergoes a deferrisation process, which recovers any metal contained in it. It is then either transported to a waste-to-energy plant or, using a special automatic machine, pressed and bound in plastic film to produce rotobales of the selected material.
The rotobales are then transported to a suitable external storage area while awaiting disposal.
The wet fraction (OFMSW) is transported to the biostabilisation area for subsequent treatment.
3 - Biostabilisation and production of SOF. In the biostabilisation stage, OFMSW delivered to Herambiente from other plants is added to the previously separated wet fraction.
The incoming material is stored in piles inside a storage facility to allow it to ferment and mature. Fermentation takes around 21 days. The hygienisation temperature is automatically maintained at a constant temperature of approximately 55°C for three days.
During the maturation process, the piles of OFMSW are progressively turned in a controlled sequence, according to the day on which the waste arrived. The entire maturation process takes at least 21 days from the day of arrival; during this time, the leachate produced is collected and placed in external storage tanks.
At the end of the turning/maturation process, the waste is conveyed by a tractor loader to a suitable screening machine (rotating screen), which separates the Stabilised Organic Fraction (SOF) from the oversieve or non-reusable fractions. Both products are then stored in designated areas to await recovery/disposal.
In conformity with legal requirements, the final destination of these products is authorised landfills. SOF, in particular, is used as a daily covering for the layers of waste in the landfills.
4 - Production of high-quality compost
5 - Storage of products and non-reusable fractions
The two different types of product (SOF and compost), as well as the by-products or waste (non-reusable fraction and rotobales) generated by the processes described above, are stored in appropriate dedicated areas.
In particular, the Stabilised Organic Fraction is accumulated by means of a tractor loader in a covered area located in the eastern part of the SOF production plant, while the compost is transferred and stored in a suitable external area pending delivery to customers.
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