Kinetic parameters of volatile fatty acids uptake in the ADM1 as key factors for modeling co-digestion of silages with pig manure, thin stillage and glycerine phase

After parameter calibration with the mixture of silages with pig manure and thin stillage, the ADM1 showed good agreement with measurements of daily biogas and methane production, and of concentrations of individual volatile fatty acids (VFAs) in the effluent. Although, initially, the prediction of biogas production with the silages mixture with thin stillage and glycerine phase was not satisfactory because the calibrated KI_h2_pro value (2.86E-08 kg COD/m3) was too low, adjusting this constant to a value of 9.70E-08 kg COD/m3 enabled this to be predicted with high accuracy.