Laboratory of Basic Research in Biomass Conversion and Utilization, University of Science and Technology of China, Hefei 230026, PR China; Institute of Chemical Engineering, Anhui University of Science and Technology, Huainan 232001, PR China.
Laboratory of Basic Research in Biomass Conversion and Utilization, University of Science and Technology of China, Hefei 230026, PR China; National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei 230026, PR China.
Bioresour Technol. 2019 Jan;271:283-288. doi: 10.1016/j.biortech.2018.09.126. Epub 2018 Sep 26.
Two-stage dilute hydrochloric acid (DA)/aqueous ammonia wet oxidation (AWO) pretreatment was used to recover the sugars of corn stover. The morphology characterizations of samples were detected by SEM, BET and SXT. The results showed that DA-AWO process demonstrated a positive effect on sugar recovery compared to AWO-DA. 82.8% of xylan was recovered in the first stage of DA-AWO process at 120 °C for 40 min with 1 wt% HCl. The second stage was performed under relative mild reaction conditions (130 °C, 12.6 wt% ammonium hydroxide, 3.0 MPa O, 40 min), and 86.1% lignin could be removed. 71.5% of glucan was achieved with a low enzyme dosage (3 FPU·g) in the following enzymatic hydrolysis. DA-AWO pretreatment was effective due to its sufficient hydrolysis of hemicellulose in the first stage and remarkably removal of the lignin in the second stage, resulting in high sugar recovery with a low enzyme dosage.
两段式稀盐酸（DA）/氨水湿式氧化（AWO）预处理用于回收玉米秸秆中的糖。通过 SEM、BET 和 SXT 对样品的形态特征进行了检测。结果表明，与 AWO-DA 相比，DA-AWO 工艺对糖回收具有积极影响。在 120°C 下用 1wt%HCl 进行 40min 的第一段 DA-AWO 过程中，回收了 82.8%的木聚糖。第二段在相对温和的反应条件下（130°C，12.6wt%氨，3.0MPaO，40min）进行，可去除 86.1%的木质素。在后续的酶解中，用低酶用量（3FPU·g）即可达到 71.5%的葡聚糖。DA-AWO 预处理是有效的，因为它在第一段充分水解了半纤维素，在第二段显著去除了木质素，从而在低酶用量下实现了高糖回收率。
