Enhancing Bioethanol Productivity Using Alkali-Pretreated Empty Palm Fruit Bunch Fiber Hydrolysate

Figure 5

Fed-batch separate hydrolysis and fermentation using the alkali-pretreated EPFBF hydrolysate with S. cerevisiae W303-1A in a 1 L jar fermentor. (a) The amounts of glucose (closed circle), xylose (closed triangle), and ethanol (open circle) were analyzed by HPLC. (b) Cell growth (closed square) was monitored by measuring the absorbance at 600 nm using a spectrophotometer. Total reducing sugar (open triangle) was measured using the 3,5-dinitrosalicylic acid method. All analyses were performed in triplicate. The data are expressed as mean ± SEM, n = 3.

(a)

(b)