The biogas plant of Codroipo, located in Pannellia, is part of a site already authorised by the Province of Udine and accessible through the existing road network, with no changes to the current entrances. The project involves a variant to the existing infrastructure with the integration of a dry anaerobic process section of the organic fraction, aimed at generating biogas for transformation into electrical and thermal energy. The aim is to improve the efficiency of bio-waste management, reduce environmental impact and produce a high quality organic soil improver ready for use in agriculture and gardening.. The process involves a first anaerobic phase in hermetic digestors, eliminating the odour emissions typical of aerobic composting. The facility is sized to handle up to 30,000 tons per year of putrescible organic fractions, generating about 3,000,000 Nmc/year of biogas.
This gas is used to power two cogenerators of 499 kW each, with an expected electrical output of about 735 kW. The residual solid fraction is mixed with about 1,000 tons per year of woody waste, not subject to anaerobic fermentation but treated by chipping and subsequently integrated into the final stabilized product. This system allows the recovery of organic matter to be maximised by minimising waste destined for landfill. The infrastructure is made of concrete and steel with sandwich panel coatings, ensuring strength and durability. The advanced emissions and effluent system minimises environmental impact, improving overall sustainability. The plant also generates a series of secondary residues, including sieve overflows, percolates and out-of-specification compost, which are stored in dedicated facilities for proper management. In addition, systems are planned for the recovery and treatment of waste accessories such as waste from tanks, ferrous scrap and residues from the cleaning of sewers and the first rain tank, contributing to an efficient model that respects environmental regulations.
