Mathematical modeling of process liquid flow and acetoclastic methanogenesis under mesophilic conditions in a two-phase biogas reactor
| Autor: | Bernd Linke, Alfio Grillo, Mandy Schönberg, Michael Heisig, Ivo Muha, Gabriel Wittum |
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| Rok vydání: | 2011 |
| Předmět: |
Anaerobic
ADM1 Environmental Engineering Chemical substance Methanogenesis Population Thermodynamics Bioengineering Acetates Chemical reaction Models Biological Methane chemistry.chemical_compound Bioreactors Biogas Phase (matter) Anaerobiosis Physics::Chemical Physics education Waste Management and Disposal education.field_of_study Renewable Energy Sustainability and the Environment Chemistry Environmental engineering General Medicine Mathematical modeling Two-phase biogas reactor Scientific method Biofuels Rheology Biotechnology |
| Zdroj: | Bioresource technology. 106 |
| ISSN: | 1873-2976 |
| Popis: | Acetoclastic methanogenesis in the second stage of a two-phase biogas reactor is investigated. A mathematical model coupling chemical reactions with transport of process liquid and with the variation of population of the microorganisms living on the plastic tower packing of the reactor is proposed. The evolution of the liquid is described by an advection-diffusion-reaction equation, while a monod-type kinetic is used for the reactions. Moreover, a new inhibition factor MO(max) is introduced, which hinders the growth of microorganisms when the plastic tower packing is overpopulated. After estimating the reaction parameters, the acetate outflow measured experimentally is in good agreement with that predicted by simulations. For coupling liquid transport with reaction processes, a spatial discretization of the reactor is performed. This yields essential information about the distribution of acetate and the production of methane in the reactor. This information allows for defining a measure of the effectiveness of the reactor. |
| Databáze: | OpenAIRE |
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