title: Application of Anaerobic Digestion Model No. 1 for simulating anaerobic mesophilic sludge digestion.
abstract: Improving anaerobic digestion of sewage sludge by monitoring common indicators such as volatile fatty acids (VFAs), gas composition and pH is a suitable solution for better sludge management. Modeling is an important tool to assess and to predict process performance. The present study focuses on the application of the Anaerobic Digestion Model No. 1 (ADM1) to simulate the dynamic behavior of a reactor fed with sewage sludge under mesophilic conditions. Parametric sensitivity analysis is used to select the most sensitive ADM1 parameters for estimation using a numerical procedure while other parameters are applied without any modification to the original values presented in the ADM1 report. The results indicate that the ADM1 model after parameter estimation was able to predict the experimental results of effluent acetate, propionate, composites and biogas flows and pH with reasonable accuracy. The simulation of the effect of organic shock loading clearly showed that an organic shock loading rate above of 35kg/m(3) day affects the performance of the reactor. The results demonstrate that simulations can be helpful to support decisions on predicting the anaerobic digestion process of sewage sludge.
authors.affiliation: Federal University of Bahia, Salvador-Ba, Brazil. Electronic address: carllosmendez@gmail.com.
authors.forename: Carlos
authors.initials: C
authors.lastname: Mendes
authors.affiliation: Federal University of Bahia, Salvador-Ba, Brazil. Electronic address: karlaesquerre@ufba.br.
authors.forename: Karla
authors.initials: K
authors.lastname: Esquerre
authors.affiliation: Federal University of Bahia, Salvador-Ba, Brazil. Electronic address: lmqueiroz@ufba.br.
authors.forename: Luciano
authors.initials: L
authors.lastname: Matos Queiroz
mesh_terms: D000693:Anaerobiosis; D057919:Biological Oxygen Demand Analysis; D019149:Bioreactors; D003198:Computer Simulation; D005232:Fatty Acids, Volatile / Q000032:analysis; D006863:Hydrogen-Ion Concentration; D008962:Models, Theoretical; D012722:Sewage / Q000382:microbiology*; D014865:Waste Disposal, Fluid / Q000295:instrumentation / Q000379:methods*
chemical_list: D005232:Fatty Acids, Volatile; D012722:Sewage
keywords: Anaerobic Digestion Model No. 1; Hydraulic retention time; Sewage sludge; Simulation