Institute of Modern Physics, Chinese Academy of Sciences, 509 Nanchang Rd., Lanzhou, Gansu 730000, PR China; University of Chinese Academy of Sciences, No. 19A Yuquan Road, Beijing 100049, PR China.
College of Physics, Northwest Normal University, Anning Rd., Lanzhou, Gansu 730000, PR China.
Carbohydr Polym. 2019 Oct 15;222:114976. doi: 10.1016/j.carbpol.2019.114976. Epub 2019 Jun 8.
A deeper understanding of the pretreatment process of lignocellulosic biomass could enhance the production efficiency of biofuels. Sweet sorghum straws (SSS) were subjected to heavy ion beams irradiation (HIBI) pretreatment and then hydrolyzed with 2.4 FPU of cellulase. Notably, the pretreatment has been proved to increase enzymatic digestibility of SSS. The reducing sugar yield and hydrolysis yield of SSS pretreated by 600 Gray (Gy) of HIBI reached to 7.23 mg/mL and 34.43% for 36 h, respectively, which was significantly higher than that of the untreated SSS (4.93 mg/mL of reducing sugar and 23.47% of hydrolysis yield). Additionally, the analysis of pretreated SSS showed that the destruction of amorphous region and surface ultrastructure as well as the transformation of polymorphs (I →I) of cellulose I were major effects on SSS by HIBI pretreatment. The results demonstrated that HIBI could be chosen as an effective physical pretreatment process for enhancing enzymatic hydrolysis yield of lignocellulosic biomass.
深入了解木质纤维素生物质的预处理过程可以提高生物燃料的生产效率。对甜高粱秸秆（SSS）进行重离子束辐照（HIBI）预处理，然后用 2.4 FPU 的纤维素酶进行水解。值得注意的是，预处理已被证明可以提高 SSS 的酶解可消化性。经 600 戈瑞（Gy）HIBI 预处理的 SSS 的还原糖产率和水解产率分别达到 7.23mg/mL 和 34.43%，在 36 小时内，这明显高于未处理的 SSS（4.93mg/mL 的还原糖和 23.47%的水解产率）。此外，对预处理 SSS 的分析表明，纤维素 I 的无定形区和表面超微结构的破坏以及多晶型（I→I）的转变是 HIBI 预处理对 SSS 的主要影响。结果表明，HIBI 可以作为一种有效的物理预处理工艺，用于提高木质纤维素生物质的酶解产率。
