مشخصات پژوهش

عنوان	CFD simulation of syntrophic anaerobic digestion of volatile fatty acids in a continuous stirred reactor
نوع پژوهش	کتاب
کلیدواژه‌ها	CFD simulation, Anaerobic digestion, Syntrophic interactions, Acetogenesis, Methanogenesis
چکیده	Understanding how a process or a bioreactor functions is a necessary pioneer for successful process design and operation. The anaerobic digestion process is a sequential complex biochemical process, which includes a series of reactions mediated by several groups of anaerobic microorganisms. In many anaerobic digesters syntrophic reactions regarded as the rate limiting steps. This research describes a three-dimensional computational fluid dynamics (CFD) simulation of syntrophic (acetogenesis, i.e. propionate and butyrate anaerobic oxidations and methanogenesis, i.e. acetate anaerobic oxidation) reactions in a continuous stirred bioreactor. The commercial software FLUENT 6.3 has been employed to solve the governing equations. An Eulerian model was formulated to simulate reactions’ zone hydrodynamics in the bioreactor with various influent concentrations of volatile fatty acids (VFAs, i.e. propionate, butyrate and acetate) and hydraulic retention times (HRT). Concentration profiles of VFAs in the two-phase system displayed a heterogeneous flow pattern in the bioreactor. Simulation results indicate that VFAs were degraded efficiently (high removal efficiencies) in the bioreactor and their concentrations in the liquid bulk were much higher that of in the gas phase. Also, the results of the model were found to be in good agreement with experimental results at low concentrations of influent VFAs. This information on syntrophic interactions along with mixing is considered to be useful in process design for better bioreactor performance.
پژوهشگران	تیمور امانی (نفر اول)، محسن نصرتی (نفر سوم)، سید محمد موسوی (نفر دوم)