Composting plant – Melilli

Composting plant – Melilli

The plant is equipped with all the facilities and equipment necessary to ensure both the correct performance of the composting operations of the organic matrixes conferred and the adequate level of safety of the plant itself and of the surraunding areas (in terms of environmental emissions and human health).


c.da Santa Catrini, Melilli (SR)


Type of service:
Executive design and construction management

Design period:
September 2018

Technical data

45.000 t/year

Sustainable development objectives | Agenda ONU 2023


Ensure availability and sustainable management of water and sanitation for all

Ensure access to affordable, reliable, sustainable and modern energy for all

Promote sustained, inclusive and sustainable economic growth, full and productive employment and decent work for all

Build resilient infrastructure, promote inclusive and sustainable industrialization and foster innovation

Ensure sustainable consumption and production patterns

Take urgent action to combat climate change and its impacts

The plant is authorized for the treatment and recovery of biodegradable organic waste
for a maximum quantity of 45.000 t/year, in order to obtain hight quality compost and
natural fertilizers.The activities within the plant can be divided into:


• storage and mechanical pre-treatment of incoming waste;
• accelerated aerobic biostabilization in biocells;
• intermediate screening of the material;
• a first phase of maturation in aerated piles;
• final refining and second phase of maturation;
• storage of the finished product.


Mitigation works of environmental impacts related to the treatment process performed in
the plant are designed:


• exhaust air treatment, sized for a flow rate of 280.000 m³/h; this system consists of
3 scrubbers equipped with two electric fans each. The air is then humidified and
dedusted and in the passage through the biofilter also the volatile organic substances
and odorigene are cut down within the limits of the law
• separate collection and management of rainwater, wastewater and leachates;
• adequate waterproofing system below all areas for handling, storage and treatment
of waste composed as follows: layer of foundation ground regularization; WNW
protection; 2.5 mm thick HDPE geomembrane; drainage geocomposite (consisting of
WNW, geogrid and WNW); mixed layer of final regularization.