Design and construction of a wet anaerobic digestion plant for the organic fraction of municipal waste. Capable of processing 40 000 t/y of OFMSW (Organic Fraction of Municipal Solid Waste) and 8 000 t/y of green waste, the plant combines an anaerobic biomass treatment phase with a subsequent composting phase to produce both biogas and high-quality compost to current regulations.

The plant consists of the following main macro-function sections:

1. Mechanical OFMSW pre-treatment section;
2. Anaerobic digestion and energy recovery section;
3. Accelerated digested/structuring mix in aerated biocells (ACT phase) bioxidation section;
4. Primary and secondary composted matrix barnyard maturation section (Curing phase)
5. Product refining and final storage section.

The biogas produced by microbial decomposition during the wet fermentation of the pretreated waste fraction mixed with water has a high calorific value, which is then enhanced energetically in cogeneration plants to produce electricity and heat suitable for uses such as district heating.