本项目针对麦糠纤维素废弃物吸附型灰分含量高的组成特点，围绕破解吸附型灰分在水热预处理过程中形成的缓冲体系，提高水热预处理过程中低聚木糖溶出率和预处理物料酶水解性能，开展吸附型灰分水热预处理中缓冲体系形成机制及影响因素、破坏吸附型灰分形成缓冲体系的技术方法与机理、水热预处理弱酸性反应环境增强对木质素的作用以及对与纤维素糖化相关的底物因子的影响作用等研究。阐明吸附型灰分在水热预处理过程中形成缓冲体系的机制，解析原料中木质素在水热预处理弱酸性反应环境增强条件下的结构变化和迁移规律，揭示弱酸性反应环境增强对与纤维素糖化相关的底物因子的影响机制。研究结果可为设计吸附型灰分含量高的纤维素废弃物高效生产生物质糖并联产低聚木糖的技术方法提供理论依据。

According to the composition characteristics of waste wheat straw containing higher content of adsorbed ash, a comprehensive study will be carried out to break the buffering system derived from adsorbed ash during hydrothermal pretreatment, and thus improving the yields of xylo-oligosaccharides as well as enzymatic saccharification. Specifically, the formation mechanism and influential factors of buffering system derived from adsorbed ash in the process of hydrothermal pretreatment will be investigated, as well as the corresponding breaking buffering system strategy and its potential mechanism, and the effects of the stronger weakly acidic condition during hydrothermal pretreatment on lignin structure and the influential factors of cellulose saccharification. Based on a series of research, the project will reveal the formation mechanism of buffering system derived from adsorbed ash during hydrothermal pretreatment, lignin structure changes, lignin migration pattern, and the changes on characteristics of pretreated substrates correlated with enzymatic saccharification under the stronger weakly acidic condition during the pretreatment. The result can provide basis for design of the co-production technology of bio-sugars and xylo-oligosaccharides from the waste cellulosic residues containing high adsorbed ash content.