生物炭在半连续厌氧消化过程中触发多途径产甲烷和抑制丙酸积累。
Biochar triggering multipath methanogenesis and subdued propionic acid accumulation during semi-continuous anaerobic digestion.
机构信息
College of Mechanical and Electronic Engineering, Northwest A&F University, Yangling, Shaanxi 712100, China; Western Scientific Observation and Experiment Station of Development and Utilization of Rural Renewable Energy of Ministry of Agriculture, Northwest A&F University, Yangling, Shaanxi 712100, China.
Key Laboratory of Non-point Source Pollution of Ministry of Agricultural and Rural Affairs, Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences, Beijing 100081, China.
出版信息
Bioresour Technol. 2019 Dec;293:122026. doi: 10.1016/j.biortech.2019.122026. Epub 2019 Aug 17.
The semi-continuous anaerobic digestion (AD) performances of dry chicken manure (DCM) were investigated at the temperature of 35 ± 1 °C with and without biochar. The average specific methane productions of 0.18 L/g VS and 0.17 L/g VS were achieved without biochar at the organic loading rate (OLR) of 3.125 and 6.25 g VS/L/d, respectively. An increase of 12% in methane production was obtained in the presence of biochar at the two operational OLRs. Accumulation of propionic acid was observed associating with AD of DCM, which was substantially alleviated by biochar supplement. The buffer capacity of biochar was supposed to develop through strengthening the buffer system established by NH and volatile fatty acids. Methanosarcina that can utilize multiple nutrients for methanogenesis was the dominant archaea in the presence of biochar, while the strictly aceticlastic Methanosaeta was dominant in control digester. These results suggest that biochar enhanced methanogenesis through intensifying its available pathway.
在 35°C±1°C 的温度下，研究了有无生物炭时干鸡粪（DCM）的半连续厌氧消化（AD）性能。在有机负荷率（OLR）分别为 3.125 和 6.25gVS/L/d 时，无生物炭时的平均甲烷产量分别为 0.18L/gVS 和 0.17L/gVS。在两个操作 OLR 下，添加生物炭可使甲烷产量增加 12%。在 DCM 的 AD 过程中观察到丙酸的积累，生物炭的添加大大缓解了丙酸的积累。生物炭的缓冲能力据推测是通过加强由 NH 和挥发性脂肪酸建立的缓冲系统而发展起来的。在有生物炭的情况下，能够利用多种营养物质进行产甲烷作用的 Methanosarcina 是优势古菌，而在对照消化器中，严格乙酸营养的 Methanosaeta 是优势古菌。这些结果表明，生物炭通过强化其可用途径来增强产甲烷作用。
Zotero 插件