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Enhancement of Enzymatic Saccharification of wheat straw residue by Ammonium Sulfite Pretreatment

Paper And Biomaterials 2017年第2期2卷 18-25页

作者： Yu Zhang JiaQing Lyu ShuJing Zhao YongCan Jin Jiangsu Co-innovation Center of Efficient Processing and Utilization of Forest Resources Nanjing Forestry University Shandong Tralin Paper Co. Ltd.

Efficient utilization of wheat straw residue(WSR) from pulp mills is an important priority for the sustainable development of the pulp and paper industry. In this study, the effects of ammonium sulfite(AS) pretreatment with different AS charges(wt%) and pretreatment temperatures on the chemical composition and enzymatic hydrolysis of WSR were studied. The results revealed that more lignin was removed with the increase of pretreatment temperature and AS charge. The degradation of hemicellulose became severe at high pretreatment temperature, while cellulose remained stable during the pretreatment process. The enzymatic hydrolysis efficiency of pretreated WSR was increased and then decreased with the increase of the AS charge and pretreatment temperature. The AS charge exerts a stronger effect on enzymatic hydrolysis efficiency than the pretreatment temperature. Glucan and xylan conversion ratios up to 88.9% and 44.9%, respectively, were obtained. The highest total sugar conversion ratio was 67.0% when WSR pretreated with 16% AS at 165℃ was hydrolyzed with a cellulase loading of 40 FPU per gram of glucan.

关键词： wheat straw residue ammonium sulfite pretreatment enzymatic hydrolysis efficiency

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