936024.fig.001a
(a)
936024.fig.001b
(b)
936024.fig.001c
(c)
936024.fig.001d
(d)
Figure 1: The positive equilibrium of the optimal purification. (a) Time series of the substrate concentration. (b) Time series of the microorganism concentration. (c) Time series of the purification effort. (d) Phase space trajectories corresponding to the optimal .