Fig. (5) Cultivation of L. bulgaricus in the Multiferm to test reproducibility of the system under different dilution rates (1: D = 0.67·µ_max, 2: D = 0.75·µ_max, 3: D = 1.00·µ_max, 4: D = 1.10·µ_max, 5: D = 1.20·µ_max). Two times six fixed-bed units were run (n = 12 in total). Data points represent means ± standard deviation. Conditions: MRS medium (initial pH of 6), 40 °C.