نویسندگان
1 دانشگاه تبریز
2 گروه مهندسی بیوسیستم، دانشکده کشاورزی، دانشگاه تبریز، تبریز ، ایران
چکیده
کلیدواژهها
موضوعات
عنوان مقاله [English]
نویسندگان [English]
Predicting and understanding how the conversion processes are combined and mixed in the anaerobic digestion method is of great importance. 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. The stirring system is mechanical and works for five minutes every 6 hours at speeds of zero, 100 and 150 rpm. According to the graphs and the results, the produced gas has almost a constant trend from the 15th day onwards and reaches 75% of methane, and the highest average percentage of methane produced is 64%, which happened at a stirring speed of 100 rpm. During the experiments, the pH was in the range of 5.7 to 7.3.
کلیدواژهها [English]
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