Abstract：
Xylose plants (produce xylose from corncob through dilute acid treatment) generate a large amount of corncob residue (CCR), most of which are burned and lacked of valorization. Herein, to address this issue, CCR was directly used as starting material for high-solid loading enzymatic hydrolysis via a simple strategy by combining PFI homogenization (for sufficient mixing) with batch-feeding. A maximum glucose concentration of 187.1 g/L was achieved after the saccharification with a solid loading of 25 wt% and enzyme dosage of 10 FPU/g-CCR. Furthermore, the residue of enzymatic hydrolysis (REH) was directly used as a bio-adhesive for plywood production with both high dry (1.7 MPa) and wet (1.1 MPa) surface bonding strength (higher than the standard (0.7 MPa)), and the excellent adhesion was due to the interfacial crosslinking between the REH adhesive (containing lignin, free glucose, and nanosized fibers) and cell wall of woods. Compared with traditional reported adhesives, the REH bio-adhesive has advantages of formaldehyde-free, good moisture resistance, green process, relatively low cost and easy realization. This study presents a simple and effective strategy for better utilization of CCR, which also provides beneficial reference for the valorization of other kinds of lignocellulosic biomass.
摘要：
木糖植物（通过稀酸处理从玉米芯中产生木糖）产生大量的玉米芯残留物（CCR），其中大部分被烧毁，缺乏价值化。在这里，为了解决这个问题，通过将PFI均化(用于充分混合)与分批进料组合的简单策略,CCR直接用作高固含量酶促水解的起始材料。在糖化后,以25wt%的固体负载和10FPU/g-CCR的酶剂量实现187.1g/L的最大葡萄糖浓度。此外，酶水解（REH）残留物直接用作胶合板生产的生物粘合剂，具有高的干（1.7MPa）和湿（1.1MPa）表面粘合强度（高于标准（0.7MPa）），和优异的附着力是由于之间的界面交联REH粘合剂（含木质素，游离葡萄糖,和纳米级纤维）和木材的细胞壁。与传统报道的粘合剂相比，REH生物粘合剂具有无甲醛的优点，良好的防潮性能,绿色工艺,成本相对较低，易于实现。本研究提出了一种简单有效的策略，可以更好地利用CCR，这也为其他种类木质纤维素生物质的增值提供了有益的参考。
