Undesirable operation of continuous bioreactors in the form of
washout, multiple steady states oscillations, limit cycles, etc. arise
when microbial kinetics are modified to accommodate substrate
and/or product inhibition [1–3], or through uncommon control
strategies [4–6]. In bioremediation processes, substrate inhibition
is a common feature, and in such cases the dynamic behaviour of
CSTRs has been analyzed via dynamic simulations [7], via bifurcation
analysis [8], and via analysis of forced waveform feeding [9].
The impact of substrate inhibition on some conventional wastewater
treatment processes such as organic substrate removal [10] and
nitrification processes [11] has also been explored. In some cases