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Monofermentation of grass silage under mesophilic conditions: measurements and mathematical modeling with ADM 1
Authors:Wichern Marc  Gehring Tito  Fischer Katrin  Andrade Diana  Lübken Manfred  Koch Konrad  Gronauer Andreas  Horn Harald
Institution:1. Institute of Water Quality Control, Technische Universität München, Am Coulombwall, 85748 Garching, Bavaria, Germany;2. Institute of Agricultural Engineering and Animal Husbandry, Bavarian State Research Center for Agriculture, Vöttinger Straße, 36, 85354 Freising, Germany;1. Study Center of Energy and Industrial Processes, Sancti Spiritus University, Ave de los Martires 360, 60100 Sancti Spiritus, Cuba;2. Faculty of Civil Engineering and Geosciences, Department of Water Management, Section Sanitary Engineering, Delft University of Technology, Stevinweg 1, 2628 CN Delft, The Netherlands;3. Division of Industrial Electrical Engineering and Automation (IEA), Department of Biomedical Engineering (BME), Lund University, Box 118, SE-221 00 Lund, Sweden;4. BIOMATH, Department of Mathematical Modeling, Statistics and Bioinformatics, Ghent University, Coupure Links 653, 9000 Gent, Belgium;5. Research Group ENVOC, Faculty of Bioscience Engineering, Ghent University, Coupure Links 653, 9000 Ghent, Belgium;1. Department of Civil and Mechanical Engineering, University of Cassino and Southern Lazio, Via Di Biasio 43, 03043 Cassino (FR), Italy;2. LBE, Univ Montpellier, INRA, 102 Avenue des Etangs, 11100, Narbonne, France;3. Department of Civil, Architectural and Environmental Engineering, University of Napoli Federico II, Via Claudio 21, 80125 Napoli, Italy;1. School of Business, Society and Engineering, Mälardalen University, Västerås, Sweden;2. School of Chemical Science and Engineering, KTH-Royal Institute of Technology, Stockholm, Sweden;1. Aalborg University Copenhagen (AAU-Cph), Department of Chemistry and Bioscience, A.C. Meyer Vaenge 15, DK 2450 Copenhagen SV, Denmark;2. Institute of Chemical Engineering and High Temperature Chemical Processes, GR 26504 Patras, Greece;3. School of Chemical Engineering, National Technical University of Athens, GR 15780 Athens, Greece;4. Technical University of Denmark, Department of Chemical and Biochemical Engineering, Søltofts Plads Building 228, 2800 Kgs. Lyngby, Denmark
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.
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