Plant data
Features
- Location: C.da Cozzo Vuturo (EN)
- Coord. UTM (Zone 33S):
438,258 E – 4,161,038 N - Site area: 4.10 ha
- Shed surface: 3,400 m²
- Design level: Final design
- Designing period: 2014
- Assignment: Final design
Cost: 11.836.978,51 €
Treatment
- Operations according to All. B and C at Part IV of D.Lgs. 152/06 s.m.i.: D8, D9, D14, D15, R1, R3, R4, R5, R13
- Potential capacity:
50,000 ton/year
31.4 ton/hour - Treatment lines: 1
Mechanical pretreatment: shredding – double screening (130 mm and 80 mm) – ferrous and nonferrous metals recovery
Biological treatment:
anaerobic digestion of underscreen materials (n. 7 tunnels, dimentions 6×30 m each one)
biological stabilization and drying of the digested sludge (n. 4 tunnels, dimentions 6×30 m each one) - Leachate storage: 1,500 m³
Accessory equipment
- Air treatment: 80,000 Nm3/hour
Air treatment system: wet scrubber and biofilter
Biofilter surface: 600 m² - Biogas cogeneration system:
600 kW endothermic engine
biogas purification system
biogas expected flow rate: 300 m³/hour
electrical energy expected production: 3,400 MWh/year
thermal energy expected production: 3,700 MWh/anno
(S0005)
Plant description
The design was developed in accordance to a public tender for the construction of an integrated system for the M.S.W. management in the Municipality of Enna (CIG 5533376E50), which was issued by the Commissioner for the Waste Emergency in Sicily (O.P.C.M. 9/7/2010 n. 3887 – D.L. n. 43/2013). The plant lay-out provides one mechanical treatment line for the screening of M.S.W. with a capacity of 31.4 ton/hour, which is divided as the following: a wide area for the storage of the incoming wastes, a shredding and a double-stage screening (with holes from 130 to 80 mm). This to separate the following materials: i) oversize fraction >130 mm by which nonferrous (e.g. aluminium cans) and ferrous materials can be separated; ii) oversize fraction 80÷130 mm, by which ferrous materials can be separated; iii) underscreen fraction <80 mm, which must be processed with biological treatment. The designed layout also provides the possibility of future development of a fine shredding section for the production of RFD from high calorific fractions.
Biological treatments provided for underscreen fractions are: 1) anaerobic digestion to obtain biogas which can be recovered into a cogenerator engine for the production of electrical and thermal energy (supplied for the self-consuption of the plant); 2) aerobic stabilization of the digested sludge to obtain a stable dry material which can be sent to disposal or recover.
The buildings will be kept in constant depression in order to ensure the health of workers; the air is recirculated within the aerobic tunnels to facilitate the process. At last the exhaust air will be treated with a scrubber and a biofilter before the emission into the atmosphere, within law limits.