Abstract—The optimum mixing pattern in anaerobic reactors
is a subject of much debate. Under plug flow conditions
incoming substrate remains in the reactor for one retention time,
allowing maximum time for conversion. However, the high
substrate concentrations resulting from lack of dispersion may
inhibit bacterial activity. On the other hand, excessive
dispersion may result in short -circuiting of substrate and would
not be ideal for granule formation in some anaerobic reactor
configurations. Excessive substrate feeding during start-up can
lead to the accumulation of volatile fatty acids and a
concomitant decrease in pH in anaerobic baffled reactors
because of their plug flow characteristics. In addition, plug flow
reactors fed with high strength wastewater are more likely to
expose sensitive bacteria to toxic levels of inorganic and organic
compounds at inlet area. To overcome these difficulties,
substrate feeding pattern to the reactor could be manipulated.
Such a configuration, the split fed anaerobic baffled reactor
(SFABR), has been developed in the Environmental Engineering
Laboratories of Newcastle University in 2001. During the
development of this reactor, tracer study was used to decide split
ratio of the reactor. As a result of the tracer study, it was
concluded that a split ratio of 0.4, 0.3, 0.2, and 0.1 should be
ideal for the SFABR.
Index Terms—Anaerobic baffled reactor (ABR), mixing, split fed anaerobic baffled reactor (SFABR), tracer study.
S. Uyanik is with the Harran University, Turkey (e-mail: email@example.com).
Cite: S. Uyanik, "A Tracer Study for the Improvement of Hydrodynamic Properties of Anaerobic Baffled Reactors (ABRs)," International Journal of Environmental Science and Development vol. 9, no. 9, pp. 274-277, 2018.