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http://dx.doi.org/10.5762/KAIS.2018.19.2.90

Hydraulic Characteristics of Anaerobic Fluidized Bed Bioreactor  

Seok, Jong-Hyuk (Department of Chemical and Environmental Technology, Inha Technical College)
Publication Information
Journal of the Korea Academia-Industrial cooperation Society / v.19, no.2, 2018 , pp. 90-96 More about this Journal
Abstract
Tracer experiments were carried out on two laboratory modes, "without media mode" and "with media mode", to examine the hydraulic characteristics of the anaerobic fluidized bed bioreactor (AFBR). For both configurations, a formula was derived for the hydraulics and data interpretation to obtain the actual characteristics of the reactor. The dispersion model is based on the assumption that carriers are non-reacting and the dispersion coefficient is constant. The model represents the one-dimensional unsteady-state concentration distribution of the non-reacting tracer in the reactors. The experimental results showed that the media increased the mixing conditions in the reactor considerably. For the reactor without media, in the range tested, the dispersion coefficient was at least an order of magnitude smaller than that of the reactor with media. Advective transport dominates and the flow pattern approaches the plug flow reactor (PFR) regime. The dispersion coefficient increased significantly as us, the superficial liquid velocity, was increased proportionally to 0.82cm/s. On the other hand, for the reactor with media, the flow pattern was in between a PFR and a completely mixed flow reactor (CMFR) regime, and the dispersion coefficient was saturated at us=0.41cm/s, remaining relatively constant, even at us=0.82cm/s. The dispersion coefficient depends strongly on the liquid Reynolds number (Re) or the particle Reynolds number (Rep) over the range tested.
Keywords
Anaerobic Treatment; Dispersion Model; Fluidized bed bioreactor; Hydraulic characteristics; Tracer test;
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