Department of Environmental Science and Engineering, Beijing University of Chemical Technology, 15 Beisanhuan East Road, Chaoyang District, Beijing 100029, PR China.
Department of Environmental Science and Engineering, Beijing University of Chemical Technology, 15 Beisanhuan East Road, Chaoyang District, Beijing 100029, PR China; Department of Water Supply and Environmental Engineering, Arba Minch University, P.O. Box 21, Arba Minch, Ethiopia.
Bioresour Technol. 2019 Sep;287:121339. doi: 10.1016/j.biortech.2019.121339. Epub 2019 Apr 27.
A new three-stage anaerobic digestion (TSAD) system combining the two-stage and serial continuously stirred tank reactor (CSTR) was developed for the high-efficiency anaerobic digestion (AD) of corn stover. At the same hydraulic retention time of 50 d and organic loading rate (OLR) of 1.8 g TS L d, TSAD achieved a 33.2-50.5% higher methane yield than that of the traditional one-stage and two-stage AD. Moreover, the TSAD process showed higher buffering ability and system stability, relieving the negative impact of serial CSTR at high OLR. It was also found that the hydrogenotrophic methanogen Methanobacteriaceae and multi-function methanogen Methanosarcinaceae were dominant, and the populations of Ruminococcaceae and Syntrophomonadaceae with the function of acetogenesis were enriched in TSAD. The results demonstrated that TSAD could be a high efficient system for converting corn stover into bioenergy.
一种新型的三阶段厌氧消化（TSAD）系统结合了两相和串联连续搅拌罐反应器（CSTR），用于高效厌氧消化（AD）玉米秸秆。在相同的水力停留时间 50 天和有机负荷率（OLR）为 1.8g TS L d 的条件下，TSAD 的甲烷产量比传统的一阶段和两阶段 AD 高出 33.2-50.5%。此外，TSAD 工艺表现出更高的缓冲能力和系统稳定性，缓解了串联 CSTR 在高 OLR 下的负面影响。还发现产氢甲烷菌 Methanobacteriaceae 和多功能甲烷菌 Methanosarcinaceae 占优势，并且具有产乙酸功能的 Ruminococcaceae 和 Syntrophomonadaceae 在 TSAD 中得到了富集。结果表明，TSAD 可以成为将玉米秸秆转化为生物能源的高效系统。
