title: Monofermentation of grass silage under mesophilic conditions: measurements and mathematical modeling with ADM 1.
abstract: In this paper experimental data from grass fermentation and simulation results with the Anaerobic Digestion Model (ADM) No. 1 are described. Two laboratory reactors were operated under mesophilic conditions with volumetric loading rates in between 0.3 and 2.5 kg(VS)/(m(3) x d). Two different kinds of grass silage were used as substrates, resulting in an average specific biogas production of 600 L/kg(VS). The ADM 1 was calibrated both manually and with the help of a Genetic Algorithm in Matlab/Simulink. Results from calibration indicate that the NH3 inhibition constant used to model the inhibition of acetate uptake is three to five times higher compared with digested activated sludge. The hydrogen inhibition constants applied for propionate and valerate/butyrate uptake are around two orders of magnitude lower than for sludge digestion.
authors.affiliation: Institute of Water Quality Control, Technische Universität München, Am Coulombwall, 85748 Garching, Bavaria, Germany. wga@bv.tum.de
authors.forename: Marc
authors.initials: M
authors.lastname: Wichern
authors.forename: Tito
authors.initials: T
authors.lastname: Gehring
authors.forename: Katrin
authors.initials: K
authors.lastname: Fischer
authors.forename: Diana
authors.initials: D
authors.lastname: Andrade
authors.forename: Manfred
authors.initials: M
authors.lastname: Lübken
authors.forename: Konrad
authors.initials: K
authors.lastname: Koch
authors.forename: Andreas
authors.initials: A
authors.lastname: Gronauer
authors.forename: Harald
authors.initials: H
authors.lastname: Horn
mesh_terms: D000465:Algorithms; D019149:Bioreactors; D002138:Calibration; D003198:Computer Simulation; D005285:Fermentation; D008954:Models, Biological; D010100:Oxygen; D006109:Poaceae / Q000502:physiology*; D012820:Silage; D013696:Temperature; D014835:Volatilization
chemical_list: D010100:Oxygen