The emissions of CO2 showed high variability without clear trends (Fig. 3). On average, in both digestates, the solid fractions had higher fluxes of CO2 (P_SF: 4529 mg m2 h1, C_SF: 4683 mg m2 h1) followed by the unseparated (P_UN: 3400 mg m2 h1, C_UN: 3138 mg m2 h1) and by the liquid fraction (P_LF: 2194 410 mg m2 h1, C_LF: 2545 266 mg m2 h1). Considering
the low emissions of CH4, CO2 was the predominant carbon emission, accounting for 99% of total C emission. As for NH3, CO2 emissions were also stimulated by the mixing operation, which favors manure oxygenation