School of Civil and Environmental Engineering, Yonsei University, Seoul 03722, Republic of Korea.
School of Civil and Environmental Engineering, Yonsei University, Seoul 03722, Republic of Korea.
Bioresour Technol. 2022 May;352:127094. doi: 10.1016/j.biortech.2022.127094. Epub 2022 Mar 30.
This study examined a two-stage dynamic membrane bioreactor (DMBR) system for biohydrogen and biomethane production from food waste (FW) in mesophilic condition. The two-stage DMBR system enabled high-rate H and CH production from particulate feedstock by enhanced microorganism retention. Chemical energy in FW was recovered up to 79% as renewable energy. The highest average hydrogen production rate of 7.09 ± 0.42 L/L-d was observed at a hydraulic retention time (HRT) of 8 h in the H-DMBR, while the highest CH average production rate of 0.99 ± 0.02 L/L-d was observed at an HRT of 6 d in the CH-DMBR. The high specific methanogenic activity of 71.7 mL CH/g VSS-d was maintained at the short HRT, which also contributed to the high MPR. The genus Clostridium was dominant in the H-DMBR, while bacterial and archaeal populations in the CH-DMBR were dominated by the class Clostridia and genera Methanobacterium and Methanosaeta, respectively.
本研究考察了两段式动态膜生物反应器（DMBR）系统，以中温条件下从食物垃圾（FW）中生产生物氢气和生物甲烷。两段式 DMBR 系统通过增强微生物保留能力，实现了从颗粒状原料中高速率生产 H 和 CH。FW 中的化学能回收利用率高达 79%，作为可再生能源。在 H-DMBR 中水力停留时间（HRT）为 8 h 时，观察到最高平均产氢率为 7.09 ± 0.42 L/L-d，而在 CH-DMBR 中 HRT 为 6 d 时，观察到最高平均产甲烷率为 0.99 ± 0.02 L/L-d。在短 HRT 下保持了 71.7 mL CH/g VSS-d 的高特异性产甲烷活性，这也有助于实现高产甲烷率。在 H-DMBR 中，梭菌属占优势，而在 CH-DMBR 中，细菌和古菌种群分别以梭菌纲和产甲烷杆菌属和产甲烷菌属为主。
