Center for Resource and Environmental Research, Beijing University of Chemical Technology, 15 Beisanhuan East Road, Chaoyang District, Beijing 100029, PR China.
Center for Resource and Environmental Research, 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. 2017 Jul;235:380-388. doi: 10.1016/j.biortech.2017.03.058. Epub 2017 Mar 11.
Several completely stirred tank reactors (CSTR) connected in series for anaerobic digestion of corn stover were investigated in laboratory scale. Serial anaerobic digestion systems operated at a total HRT of 40days, and distribution of HRT are 10+30days (HRT10+30d), 20+20days (HRT20+20d), and 30+10days (HRT30+10d) were compared to a conventional one-step CSTR at the same HRT of 40d. The results showed that in HRT10+30d serial system, the process became very unstable at organic load of 50gTS·L. The HRT20+20d and HRT30+10d serial systems improved methane production by 8.3-14.6% compared to the one-step system in all loads of 50, 70, 90gTS·L. The conversion rates of total solid, cellulose, and hemicellulose were increased in serial anaerobic digestion systems compared to single system. The serial systems showed more stable process performance in high organic load. HRT30+10d system showed the best biogas production and conversions among all systems.
几个完全搅拌的坦克反应堆（CSTR）串联用于玉米秸秆的厌氧消化在实验室规模进行了研究。串联厌氧消化系统在总停留时间为 40 天的条件下运行，HRT 的分布为 10+30 天（HRT10+30d）、20+20 天（HRT20+20d）和 30+10 天（HRT30+10d），与相同 HRT 的传统一步式 CSTR 进行了比较。结果表明，在 HRT10+30d 串联系统中，当有机负荷为 50gTS·L 时，该过程变得非常不稳定。与一步式系统相比，HRT20+20d 和 HRT30+10d 串联系统在所有 50、70、90gTS·L 负荷下均提高了甲烷产量 8.3-14.6%。与单系统相比，串联厌氧消化系统中总固体、纤维素和半纤维素的转化率有所提高。与单系统相比，串联系统在高有机负荷下表现出更稳定的工艺性能。在所有系统中，HRT30+10d 系统的沼气产量和转化率最高。
