He Chao, Song Hao, Hou Tingting, Jiao Youzhou, Li Gang, Litti Yuri V, Zhang Quanguo, Liu Liang
Key Laboratory of New Materials and Facilities for Rural Renewable Energy of Ministry of Agriculture and Rural Affairs, College of Mechanical & Electrical Engineering, Henan Agricultural University, Zhengzhou 450002, China; Henan International Joint Laboratory of Biomass Energy and Nanomaterials, Henan Agricultural University, Zhengzhou 450002, China; Henan Collaborative Innovation Center of Biomass Energy, Henan Agricultural University, Zhengzhou 450002, China.
Key Laboratory of New Materials and Facilities for Rural Renewable Energy of Ministry of Agriculture and Rural Affairs, College of Mechanical & Electrical Engineering, Henan Agricultural University, Zhengzhou 450002, China; Henan University of Engineering, Zhengzhou 451191, China.
Bioresour Technol. 2023 Jun;377:128947. doi: 10.1016/j.biortech.2023.128947. Epub 2023 Mar 22.
In this research, CO-nanobubble water (CO-NBW) and iron nanoparticles (FeNPs) were added simultaneously to exploit individual advantages to enhance the methanogenesis process from both the stability of anaerobic digestion (AD) system and the activity of anaerobic microorganism aspects. Results showed that the AD performance was enhanced by supplementing with CO-NBW or FeNPs individually, and could be further improved by simultaneous addition of the two additives. The maximum methane yield was achieved in the CO-NBW + FeNPs reactor (141.99 mL/g-VS), which increased by 26.16% compared to the control group. Similarly, the activities of the electron transfer system (ETS) and enzyme were improved. The results of microbial community structure revealed that the addition of CO-NBW and FeNPs could improve the abundance of dominant bacteria (Anaerolineaceae, Bacteroidales, and Prolixibacteraceae) and archaea (Methanotrichaceae and Methanospirillaceae). Additionally, the functional metabolic prediction heatmap indicated that metabolic functional genes favorable for AD of corn straw were enhanced.
在本研究中，同时添加了一氧化碳纳米气泡水（CO-NBW）和铁纳米颗粒（FeNPs），以利用各自的优势，从厌氧消化（AD）系统的稳定性和厌氧微生物的活性两方面增强甲烷生成过程。结果表明，单独添加CO-NBW或FeNPs均可提高AD性能，同时添加这两种添加剂可进一步改善AD性能。在CO-NBW + FeNPs反应器中实现了最大甲烷产量（141.99 mL/g-VS），与对照组相比增加了26.16%。同样，电子传递系统（ETS）和酶的活性也得到了提高。微生物群落结构结果表明，添加CO-NBW和FeNPs可提高优势细菌（厌氧绳菌科、拟杆菌目和长杆菌科）和古菌（甲烷鬃毛菌科和甲烷螺菌科）的丰度。此外，功能代谢预测热图表明，有利于玉米秸秆厌氧消化的代谢功能基因得到了增强。
