Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences, Guangzhou 510640, PR China; CAS Key Laboratory of Renewable Energy, Guangzhou 510640, PR China; Guangdong Provincial Key Laboratory of New and Renewable Energy Research and Development, Guangzhou 510640, PR China; University of Chinese Academy of Sciences, Beijing 100049, PR China.
Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences, Guangzhou 510640, PR China; CAS Key Laboratory of Renewable Energy, Guangzhou 510640, PR China; Guangdong Provincial Key Laboratory of New and Renewable Energy Research and Development, Guangzhou 510640, PR China.
Bioresour Technol. 2018 May;255:205-212. doi: 10.1016/j.biortech.2017.12.001. Epub 2017 Dec 6.
Alkaline pretreatment with NaOH was used to improve methane yield from Pennisetum Hybrid. The pretreatments were carried out with different NaOH solutions (2-8% w/w) at three temperatures (35, 55 and 121 °C) for different periods of time (24, 24 and 1 h). All treated and untreated Pennisetum Hybrid were digested under mesophilic conditions (37 °C) to biogas, significant effects of the pretreatments on the yield of methane were observed. Results showed the modified Gompertz equation was reliable (determination coefficients (R) greater than 0.96) to describe the kinetic behavior of anaerobic digestion of Pennisetum Hybrid. The best result, obtained by the treatment at 35 °C 2% NaOH for 24 h, resulted in the methane yield of 301.7 mL/g VS, corresponding to 21.0% improvement in the methane yield. Compositional, SEM, XRD and FTIR analysis confirmed that lignin removal, structural modification and cellulose crystalline variation were responsible for the improvement.
采用 NaOH 碱性预处理来提高杂交狼尾草的甲烷产量。在 35、55 和 121°C 三种温度下，用 2-8%（w/w）的不同 NaOH 溶液对杂交狼尾草进行不同时间（24、24 和 1 h）的预处理。所有处理和未处理的杂交狼尾草均在中温（37°C）条件下消化产生沼气，预处理对甲烷产量有显著影响。结果表明，修正的 Gompertz 方程能够可靠地描述（决定系数（R）大于 0.96）杂交狼尾草厌氧消化的动力学行为。在 35°C 2%NaOH 处理 24 h 时得到了最佳结果，甲烷产量为 301.7 mL/gVS，甲烷产量提高了 21.0%。成分、SEM、XRD 和 FTIR 分析证实，木质素去除、结构修饰和纤维素结晶变化是提高产量的原因。
