Foam-free production of Surfactin via anaerobic fermentation of Bacillus subtilis DSM 10T

AMB Express

Table 1 Summary of the process parameters during various fermentations

Glucose concentration [g/L]	2.5	5	7.5	10
Cultivation time [h]	55	102	108	161
Max. CDW [g/L]	0.320	0.612	0.856	0.586
Max. c_Surfactin [g/L]	0.087	0.105	0.150	0.158
μ_max [h⁻¹]	0.105	0.114	0.118	0.074
Y_P/X [g/g]	0.278	0.169	0.179	0.259
Y_X/S [g/g]	0.120	0.105	0.119	0.049
Y_P/S [g/g]	0.033	0.018	0.022	0.011
q_Surfactin [g/(g∙h)]	0.005	0.002	0.002	0.002
vol. q_Surfactin [g/(L∙h)]	0.002	0.001	0.002	0.001

All values are mean values of two fermentations.
Comparison of process parameters during anaerobic fermentation of Bacillus subtilis DSM 10^T with different glucose concentrations.