State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources, Guangxi Microorganism and Enzyme Research Center of Engineering Technology, College of Life Science and Technology, Guangxi University, Nanning, Guangxi 530004, China.
State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources, Guangxi Microorganism and Enzyme Research Center of Engineering Technology, College of Life Science and Technology, Guangxi University, Nanning, Guangxi 530004, China.
Bioresour Technol. 2021 May;328:124851. doi: 10.1016/j.biortech.2021.124851. Epub 2021 Feb 15.
This study aimed to investigate the interactions between banana pseudo-stems (BPS) and chicken manure (CM) during anaerobic co-digestion (AcoD) in batch and semi-continuous experiments. The batch experiments results showed that the methane yield was the highest (193.7 mL/g VS) in AcoD with BPS: CM ratio of 4:1, which was increased by 57.2% and 66.1%, respectively. Semi-continuous experiments revealed that AcoD resulted in higher methane production. Monitoring of the system parameters indicated that AcoD could better adapt to the increasing organic loading rate, with better system stability and methane production efficiency. The microbial analysis illustrated that AcoD increased the relative abundance of hydrolytic bacteria such as Firmicutes, Patescibacteria, and Bacteroidetes. With regard to archaea, AcoD improved the abundance of Methanosaeta, the major acetoclastic methanogens. These changes in the microbial flora allowed AcoD to remain stable while efficiently producing methane and improved the BPS and CM processing efficiency.
本研究旨在通过批式和半连续实验，探究香蕉假茎（BPS）与鸡粪（CM）在厌氧共消化（AcoD）过程中的相互作用。批式实验结果表明，BPS:CM 为 4:1 时 AcoD 的甲烷产量最高（193.7 mL/g VS），分别提高了 57.2%和 66.1%。半连续实验表明 AcoD 可提高甲烷产量。系统参数监测表明，AcoD 可更好地适应有机负荷率的增加，具有更好的系统稳定性和甲烷生产效率。微生物分析表明，AcoD 增加了水解细菌（如 Firmicutes、Patescibacteria 和 Bacteroidetes）的相对丰度。就古菌而言，AcoD 提高了主要的产乙酸甲烷菌 Methanosaeta 的丰度。微生物菌群的这些变化使 AcoD 能够在高效产甲烷的同时保持稳定，并提高了 BPS 和 CM 的处理效率。
