Xylonic acid can be produced with high-yield from hemicelullosic xylose, which accounts for 25% of the total sugars in lignocellulosic material. The key barrier associated with efficient bio-oxidation of hemicellulosic xylose to xylonic acid is the serious foam formed in downstream air-aerated and agitated bioreaction process, which caused by the high viscosity of concentrated pre-hydrolysate. Powdered activated carbon treatment can selectively absorb the non-sugar compounds with relatively low losses of xylose, which is beneficial for the valuable xylose derivatives production. In this present study, powdered activated carbon was employed for treating the concentrated pre-hydrolysate from diluted acid pretreated corncob. The results indicated that the powdered activated carbon treatment significantly reduced the viscosity of concentrated pre-hydrolysate and the other non-sugar compounds, which enabled scale-up lignocellulosic xylonic acid production using the air-aerated and agitated bioreactor.

木糖醛酸可以由半纤维素木糖高产率地生产，其占木质纤维素材料中总糖的25％。与半纤维素木糖有效生物氧化为木糖酸相关的主要障碍是下游空气充气和搅动的生物反应过程中形成的严重泡沫，这是由浓缩的预水解产物的高粘度引起的。粉末状活性炭处理可以选择性地吸收木糖损失较少的非糖类化合物，这对于有价值的木糖衍生物生产是有益的。在本研究中，粉末状活性炭用于处理稀酸预处理玉米芯中浓缩的预水解产物。