【摘要】 通过考察辐照剂量、辐照与NaOH溶液浸泡组合顺序、NaOH溶液浓度、NaOH溶液浸泡时间等因素,研究了较低剂量辐照与NaOH溶液温和浸泡协同预处理工艺。对还原糖得率、组分改变、结晶度等进行了分析,对该协同工艺的作用机理进行了探讨。实验结果表明,单纯的较低剂量辐照对麦秸的组分及结晶度的改变作用不明显,但可大幅降低后续碱浸泡所需的用量和时间。经组合工艺处理后,麦秸的相关特征参数均发生了明显改变。较适宜的组合预处理工艺为小麦秸秆经100 kGy辐照,然后以2%NaOH溶液浸泡1 h,其酶解还原糖得率达到理论产率的78.2%。更多还原

【Abstract】 Gamma ray radiation and alkali solution pretreatment of wheat straw and its effect on enzymatic hydrolysis were studied.The result shows that the γ-irradiation can significantly decrease the initial concentration of alkali solution and shorten the pretreated time,but the changes in the physical and chemical properties of only irradiated wheat straw are indistinctive.A synergistic effect between irradiation and alkali solution pretreatment was observed.Reducing sugar yield is 78.2%(accounted for theoretical yield) after wheat straw is radiated at a dose of 100 kGy and then with 2%NaOH pretreated for 1 h.更多还原