Application of Anaerobic Digestion Model 1 (ADM1) for Prediction of Biogas Production

Anaerobic Digestion Model 1 (ADM1), developed by the International Water Association (IWA) in 2002 is the first and most advanced model applicable for predicting biogas pro-duction and the dynamic processes involved. The model includes parameters after the dis-integration to define substrates in terms of carbohydrates (XCh), proteins (XPr), lipids (XLi) and inert (XI) fractions. Chemical Weendervan Soest analysis was performed to characterize substrates and batch experiments were performed using ANKOM Wireless gas sensor devices. The biogas production using chicken manure was monitored on hourly basis and further simulations were performed using the kinetic constants derived from the experimental results. The simulation program SIMBA® was used for the calculations. The results obtained showed a comparison with experimental data, both in terms of the calcu-lated amount of gas and in terms of the gas composition and was in very good agreement with the corresponding measured values. Use of ADM was thus determined to be reliable and beneficial in predicting the biogas production and the system dynamics.