Figure 2
LA fermentation of 8% (w/w) NH3-H2O2-pretreated and unwashed corncob.
(A) Concentration of sugars (glucose and xylose), LA, and inhibitors (acetic acid, total phenolics, and formic acid) during the fermentation of corncob substrate pretreated for 1 day with NH3 and then treated for 1 day with H2O2 at pH6.0 (adjusted by automatic NaOH solution feeding). (B) Fermentation of corncob substrate pretreated for 1 day with NH3 followed by 7 days of H2O2 treatment at pH6.0 (adjusted by automatic NaOH solution feeding). (C) Fermentation of corncob substrate pretreated for 1 day with NH3 then treated for 7 days with H2O2 using CaCO3 as a neutralizer. Blue diamond, LA; red square, acetic acid; green circle, total phenolics; brown triangle, glucose; cyan triangle, xylose; orange triangle, formic acid. Experiments were carried out in duplicate and error bars are shown. Where error bars are not visible, they are smaller than the size of the symbol used.
