Department of Environmental Science and Engineering, Beijing University of Chemical Technology, 15 Beisanhuan East Road, Chaoyang District, Beijing 100029, PR China; State Environmental Protection Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing 100012, PR China; State Environmental Protection Key Laboratory of Hazardous Waste Identification and Risk Control, Chinese Research Academy of Environmental Sciences, Beijing 100012, PR China.
Department of Environmental Science and Engineering, Beijing University of Chemical Technology, 15 Beisanhuan East Road, Chaoyang District, Beijing 100029, PR China.
Bioresour Technol. 2021 Apr;325:124713. doi: 10.1016/j.biortech.2021.124713. Epub 2021 Jan 14.
The performance and microbial community dynamics in anaerobic co-digestion (ACoD) of chicken manure and corn stover with different modification methods and trace element supplementation strategy were investigated in this study. KOH and liquid fraction of digestate (LFD) were applied for modification; Fe, Co, Mn, Mo, and Ni were used for supplement. Results showed that the selected trace element was insufficient in the partial or whole digestion process. When trace element supplement was combined with KOH or LFD modifications, the ACoD obtained biomethane yields of 245.3-258.0 and 254.0-261.8 mL·gVS, 26.0%-32.5% and 30.5%-34.5% more than that of the control, respectively. Microbial community analyses indicated that the composition and diversity of archaea and bacteria varied at genus level. Main pathways involved in ACoD were affected accordingly, which in turn affected co-digestion performance. This study demonstrated that the combining modification and trace element supplement could improve the digestion performance and achieve higher biomethane yield.
本研究考察了不同改性方法和微量元素添加策略对鸡粪和玉米秸秆厌氧共消化（ACoD）的性能和微生物群落动态的影响。采用 KOH 和消化液（LFD）进行改性；添加 Fe、Co、Mn、Mo 和 Ni 作为微量元素。结果表明，部分或整个消化过程中所选微量元素不足。当微量元素补充与 KOH 或 LFD 改性结合使用时，ACoD 获得的生物甲烷产率分别比对照提高了 245.3-258.0%和 254.0-261.8%，26.0%-32.5%和 30.5%-34.5%。微生物群落分析表明，古菌和细菌的组成和多样性在属水平上发生了变化。相应地影响了 ACoD 中的主要途径，进而影响了共消化性能。本研究表明，结合改性和微量元素添加可以提高消化性能并获得更高的生物甲烷产率。
