During WP4 the following tasks will be performed:
• characterization of the chemical and physical properties of the digestates selected and sampled in WP3;
• evaluation of the digestate variability when changing the process parameters and the characteristics of the input materials, along with seasonal variations.

Both the chemical and physical characterizations of digestate will be carried out in cooperation with the Free University of Bolzano, according to the know-how developed by the Industrial Technical Physics group in the analysis of wood biomass and by-products of pyrolysis, gasification or roasting processes, as well as the experience of the Agricultural Chemistry group in the chemical characterization of organic compounds.