小麦秸秆的γ辐照与NaOH溶液的协同预处理

Pretreatment of Wheat Straw by γ-ray Radiation and Alkali Solution

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%。

Abstract: 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