Aspen Plus® Process Simulation Model of the Biomass Ash-Based Treatment of Anaerobic Digestate for Production of Fertilizer and Upgradation of Biogas

The use of the commercial simulator Aspen Plus® could bring an amelioration in accuracy predictions chemical species composition output streams anaerobic digestion process. Compared to traditionally employed lumped models, which are elaborated from scratch, models implemented have access a broad library thermodynamic and phenomena transport properties. In present investigation, process simulation model for has been prepared by including stoichiometric-equilibria reactor calculate extent ionization molecules digestate. characterizes technical feasibility digestate stabilization, means biomass ash-based treatment, production organic fertilizer potential biogas upgradation with synthesis ammonium carbonate. First all, titration manure hydrochloric acid showed that dose 3.18 mEq/g would be required attain targeted pH zero-point charge, upon addition sewage sludge ash ratio 0.6 ± 0.2%. Secondly, profiles ammonia, carbon dioxide, methane found agree treated enable upgrading NH4HCO3. needs further developed ensure standards attained all stabilized digestate, biomethane, isolated added-value fertilizers.