Fig. 2

ABE production of C. beijerinckii incubated on WRD and ER mixtures or enzymatically pretreated substrates. a The strain was incubated over 72 h on GM with the mixtures of WRD and ER. 15% WRD and 15% ER were used as control conditions. b The substrates were enzymatically pretreated for 24 h at 50 °C with 0.5% (v/v) of the cellulase and hemicellulase mixture cellic ctec2. Afterwards, C. beijerinckii NCIMB 8052 was incubated on these substrates as described in a). Error bars represent standard deviation (N = 3)