Ecoacciaio’s clients include Unigrà S.p.A., one of the leading Italian agri-food groups and an international leader in the production of ingredients and semi-finished products for the food industry, with a presence in over 100 countries worldwide.

For this major project, Ecoacciaio carried out the construction, prefabrication, supply, and installation of 6,000 m³ biodigesters, destined for one of the Group’s most advanced energy recovery plants.

The tanks were built with a mixed configuration, using coated carbon steel for the lower part and stainless steel for the upper part—a solution designed to combine structural strength, durability, and performance under various operating conditions.

Each unit was completed with a fixed steel dome roof, consisting of a spherical cap, and all process elements: structural manway, flanged nozzles for the installation of mixers on the shell and roof, process connections, accessories, and special steelwork, entirely prefabricated and installed by Ecoacciaio personnel.

Construction was carried out using the automatic welding and rotational construction systems developed by Ecoacciaio, a technology that allows for the creation of tanks up to 50 meters in diameter, ensuring higher productivity, execution uniformity, high geometric precision, and constant quality control during all assembly phases.

The high level of quality achieved was verified through a rigorous non-destructive testing plan. The welds subjected to radiographic testing fully complied with the required checks, confirming the high construction standards that distinguish every Ecoacciaio project.