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%。
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 pretrea- ted 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 forl h.
出处
《原子能科学技术》
EI
CAS
CSCD
北大核心
2009年第4期304-310,共7页
Atomic Energy Science and Technology
基金
国家自然科学基金资助项目(50678089)
关键词
小麦秸秆
Γ辐照
NAOH溶液
预处理
酶水解
wheat straw
gamma ray radiation
NaOH solution
pretreatment
enzyme hydrolysis
