Figure 12

Comparative SGH fermentations of superior adapted isolates of S. stipitis. Superior adapted isolates and their parent strain NRRL Y-7124 are compared fermenting enzymatic hydrolyzates of dilute acid-pretreated switchgrass (20% solids loading) at 25°C and initial pH 6.2 at high initial cell density (A) or low initial cell density (B). Time courses of biomass (red squares), glucose (black circles and dashed line), xylose (blue circles and solid line), and ethanol (green triangles) are shown. Error bars represent the range about the mean value marked by symbols.