Fig. 2

Ethanol production by C. thermocellum M1570 during second-round fermentations of switchgrass. a Ethanol production on 10 g/L washed biomass from the initial 10, 25, and 50 g/L switchgrass fermentations. b Ethanol production at different loadings using the original 50 g/L switchgrass after washing. All values are averages (n = 6) from two independent experiments. Error bars represent standard deviation