School of Chemical Engineering, Southwest Forestry University, Kunming 650224, China.
Key Laboratory for Forest Resources Conservation and Utilization in the Southwest Mountains of China, Ministry of Education, Southwest Forestry University, Kunming 650224, China; School of Chemical Engineering, Southwest Forestry University, Kunming 650224, China.
Bioresour Technol. 2022 Aug;358:127321. doi: 10.1016/j.biortech.2022.127321. Epub 2022 May 21.
Bamboo pretreatment with alkaline deacetylation-aided hydrogen peroxide-acetic acid (HPAC-NaOH) was investigated for producing high-value-added products. Comparing with HPAC pretreated D. sinicus, the post-treatment of alkaline deacetylation resulted in higher glucose yield of 91.3% and ethanol concentrations of 17.20 g/L, increased by about 20-27%. A strong negative correlation between the content of acetyl with cellulose accessibility and enzymatic hydrolysis yield was showed. The deacetylation of HPAC-DS contributed to the increase of cellulase adsorption capacities in substrates and the variations of hydrophilicity, cellulose crystallinity, and degree of polymerization, which can generate highly reactive cellulosic materials for enzymatic saccharification to produce bioethanol. The HPAC-NaOH pretreatment can provide a promising approach to improve the bioconversion of bamboo to biofuels, and has broad space for the biorefinery of bamboo in the south of China.
采用碱性脱乙酰化-过氧化氢-乙酸（HPAC-NaOH）预处理竹子，以生产高附加值产品。与 HPAC 预处理的麻竹相比，碱性脱乙酰化后处理可将葡萄糖得率提高 91.3%，乙醇浓度提高到 17.20 g/L，提高了约 20-27%。乙酰基含量与纤维素可及性和酶水解产率之间呈强负相关。HPAC-DS 的脱乙酰化有助于增加纤维素酶在底物中的吸附能力，并改变亲水性、纤维素结晶度和聚合度，从而产生高反应性的纤维素材料，用于酶解糖化生产生物乙醇。HPAC-NaOH 预处理为提高竹子转化为生物燃料的生物转化提供了一种很有前途的方法，在中国南方的竹材生物炼制中有广阔的应用空间。
