氨化纤维爆破联合过氧化氢预处理对草本和木质废弃物产氢能力的影响
Effect of Ammoniated Fiber Explosion Combined with HO Pretreatment on the Hydrogen Production Capacity of Herbaceous and Woody Waste.
作者信息
Cai Ziyuan, Zhang Weihua, Zhang Jingjing, Zhang Jilin, Ji Dandan, Gao Wensheng
机构信息
College of Environmental Science and Engineering, Qilu University of Technology (Shandong Academy of Science), Jinan 250353, Shandong, P. R. China.
Institute of Vegetables and Flowers, Shandong Academy of Agricultural Sciences, Jinan 250100, Shandong, P. R. China.
出版信息
ACS Omega. 2022 Jun 13;7(25):21433-21443. doi: 10.1021/acsomega.2c00598. eCollection 2022 Jun 28.
An appropriate pretreatment process is an important part of the preparation of biomass energy from agricultural and forestry waste. Compared to physical and chemical pretreatments alone, the combined ammoniated fiber explosion (AFEX) + hydrogen peroxide (HO) pretreatment process can significantly improve the lignin degradation rate and saccharification efficiency, thus improving the hydrogen production capacity during medium-temperature dark fermentation. This study showed that the combined pretreatment increased the saccharification efficiency of herbaceous, hardwood, and softwood biomass by 58.7, 39.5, and 20.6% and the corresponding gas production reached 145.49, 80.75, and 57.52 mL/g, respectively. In addition, X-ray diffraction, scanning electron microscopy, and Fourier-transform infrared spectroscopy showed that AFEX + HO disrupted the structure of the feedstock and was more favorable for lignin removal. Soluble metabolites indicated that AFEX + HO pretreatment enhanced the butyrate metabolic pathway of the substrate and biohydrogen generation and increased the levels of extracellular polymers and microbial community structure.
适当的预处理工艺是利用农林废弃物制备生物质能源的重要环节。与单独的物理和化学预处理相比，氨化纤维爆破（AFEX）+过氧化氢（HO）联合预处理工艺可显著提高木质素降解率和糖化效率，从而提高中温黑暗发酵过程中的产氢能力。本研究表明，联合预处理使草本、硬木和软木生物质的糖化效率分别提高了58.7%、39.5%和20.6%，相应的产气量分别达到145.49、80.75和57.52 mL/g。此外，X射线衍射、扫描电子显微镜和傅里叶变换红外光谱表明，AFEX+HO破坏了原料结构，更有利于木质素的去除。可溶性代谢产物表明，AFEX+HO预处理增强了底物的丁酸代谢途径和生物制氢过程，并提高了胞外聚合物水平和微生物群落结构。
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