The maximum productivity (0.76 g/L/h) occurred
at an initial glucose loading of 50 g/L (Fig. 2b). However,
an initial glucose concentration of 20 g/L also showed good results
with a slightly higher yield, but slightly lower productivity than
that obtained from a glucose loading of 50 g/L. An initial glucose
loading of 20 g/L was thus considered the optimum value.