| Simulation of mixing effect on methane production in anaerobic digestion |
| Paper ID : 1239-NICAME1402 |
| Authors: |
|
Mohammad Mohammadi *1, Arman Jalali1, shamsolah Abdolah Por1, mousa Mohammad Por Fard2 1Department of Biosystems Engineering, Tabriz University 2Department of Chemical and Petroleum Engineering, University of Tabriz |
| Abstract: |
| Abstract Predicting and understanding how the conversion processes are combined and mixed in the anaerobic digestion method is of great importance. Because anaerobic digestion technology is one of the acceptable methods in the field of industry. Mathematical modeling is one of the powerful tools that have been considered with the aim of solving and investigating such problems. Therefore, in this research, using Computational Fluid Dynamics (CFD), the prediction of the kinetic process of biogas production from animal waste and providing the appropriate stirring cycle during the anaerobic digestion process was investigated. In the initial stages of the work, data related to an anaerobic digester with agitator, mixing speeds of 0, 100 and 150 rpm were recorded for one month, and the measured characteristics were converted into the inputs of the ADM1 model. Then, the initial values that were reported during the start-up stage of the digester were estimated. The reactor was optimized to a volume of 400 liters and built as a double wall. The stirring system is mechanical and works for five minutes every 6 hours at a speed of 100 rpm. The highest percentage of methane production is 55%. During the experiments, the pH was in the range of 1.7 to 5.7. Therefore, although in this period, PH did not play a role as an inhibitory factor and its relations, as an inhibitory factor, were not included in the model; However, its role in biogas production cannot be hidden. |
| Keywords: |
| CFD, ADM1, mixing, biogas |
| Status : Paper Accepted (Poster Presentation) |
