Institute of Fluid Science, Tohoku University, 2-1-1 Katahira, Aoba-ku, Sendai 980-8577, Japan; Department of Civil and Environmental Engineering, Graduate School of Engineering, Tohoku University, 6-6-06 Aoba, Aramaki, Aoba-ku, Sendai 980-8579, Japan.
Department of Civil and Environmental Engineering, Graduate School of Engineering, Tohoku University, 6-6-06 Aoba, Aramaki, Aoba-ku, Sendai 980-8579, Japan; Department of Chemical Engineering, Graduate School of Engineering, Tohoku University, 6-6-07 Aoba, Aramaki, Aoba-ku, Sendai 980-8579, Japan.
Bioresour Technol. 2021 Sep;336:125306. doi: 10.1016/j.biortech.2021.125306. Epub 2021 May 19.
A submerged anaerobic membrane bioreactor (SAnMBR) was used in the treatment of real municipal wastewater at operation temperatures ranging from 15 °C to 25 °C and hydraulic retention time (HRT) of 6 h. The treatment process was evaluated in terms of organic removal efficiency, biogas production, sludge growth and membrane filtration. During long-term operation, the SAnMBR achieved chemical oxygen demand removal efficiencies of about 90% with a low sludge yield (0.12-0.19 g-VSS/g-COD) at 20-25 °C. Approximately 1.82-2.27 kWh/d of electric energy was generated during the wastewater treatment process at 20-25 °C, 0.67 kWh/d was generated at 15 °C. The microbial community analysis results showed that microbial community was dominated by aceticlastic methanogens, coupled by hydrogenotrophic methanogens and a very small quantity of methylotrophic methanogens. It was also shown that the stabilization of the microbial community could be attributed to the carbohydrate-protein degrading bacteria and the carbohydrate degrading bacteria.
采用淹没式厌氧膜生物反应器（SAnMBR）处理实际城市污水，运行温度范围为 15°C 至 25°C，水力停留时间（HRT）为 6 小时。从有机去除效率、沼气产生、污泥生长和膜过滤等方面对处理过程进行了评估。在长期运行过程中，SAnMBR 在 20-25°C 时的化学需氧量去除效率约为 90%，污泥产率低（0.12-0.19 g-VSS/g-COD）。在 20-25°C 时，污水处理过程中大约产生 1.82-2.27 kWh/d 的电能，在 15°C 时产生 0.67 kWh/d 的电能。微生物群落分析结果表明，微生物群落主要由乙酸营养型产甲烷菌主导，与氢营养型产甲烷菌耦合，并有少量的甲基营养型产甲烷菌。研究还表明，微生物群落的稳定可归因于碳水化合物-蛋白质降解菌和碳水化合物降解菌。
