Time [h]

Cell mass [g/l]

YP/S (g xylitol/g xylose)

YP/X (g xyiltol/g initial cells)

CE [%]

Maximum Xylitol Concentration [g/l]

120

0.5

0.80

61.15

58.4

29.76

1.0

0.90

24.32

47.5

24.09

1.5

0.76

19.19

56.3

28.43

144

0.5

0.76

71.16

67.9

34.64

1.0

0.86

30.20

58.9

29.92

1.5

0.70

20.64

60.6

30.59
Table 4: Xylitol yields from xylose and cells (YP/S, YP/X), conversion efficiency (CE) and growth rates of IMB2 with different initial cell mass concentrations (Test parameters: 40°C, 100 rpm, and 50 g/l initial xylose concentration).