© 2025 martinoassociati - Engineering and Environmental Technologies Company S.r.l.
Registered office: Via Antonio Paglialunga 3, 58100 Grosseto (GR), Italy VAT / Tax Code: 01225540531
Registered with the Grosseto Companies Register no. 01225540531 — R.E.A.: GR-106058 Fully paid-up share capital: € 51,500.00
mail: info@martinoassociati.it - All rights reserved
Sienambiente's OFMSW recovery plant
Key information
Location
Le cortine, Siena (Tuscany)
Client
Sienambiente (Iren group)
Services provided
Preliminary design, final design, SIA, Authorization procedures
Investment
~ € 20 mln
Treatment capacity: 54,000 t/y of OFMSW
Technology: Semi-dry anaerobic digestion (2 digesters, total volume 6,400 m³), integrated with aerobic treatment for the production of mixed composted soil improver. The plant produces biogas intended for upgrading to biomethane, with total recovery of CO₂ to food grade specification, sent for commercialization.
Includes systems for the recovery of ferrous and non-ferrous metals, minimizing non-recoverable waste.
Energy production
- Biogas production: 8,200,000 Nm³/y (≈ 940 Nm³/h)
- Biomethane production: 5,000,000 Nm³/y (≈ 570 Nm³/h)
- CO₂ recovery: 7,500 t/y
Material production
- Compost produced (mixed soil improver): 22,000 t/y
- Non-compostable waste: 5,500 t/y
- Ferrous metal recovery: 1,000 t/y
- Non-ferrous metal recovery: 350 t/y
Photo gallery
