期刊
BIORESOURCE TECHNOLOGY
卷 336, 期 -, 页码 -出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2021.125306
关键词
Real municipal wastewater; Operation temperature; Microbial community; Anaerobic membrane bioreactor; Biogas energy
资金
- Ministry of the Environment, Japan
- Japan Society for the Promotion of Science [19J12023]
- Grants-in-Aid for Scientific Research [19J12023] Funding Source: KAKEN
The study on using SAnMBR to treat municipal wastewater showed that high organic removal efficiency and electric energy generation were achieved at 20-25 degrees C.
A submerged anaerobic membrane bioreactor (SAnMBR) was used in the treatment of real municipal wastewater at operation temperatures ranging from 15 degrees C to 25 degrees 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-CODrem) at 20-25 degrees C. Approximately 1.82-2.27 kWh/d of electric energy was generated during the wastewater treatment process at 20-25 degrees C, 0.67 kWh/d was generated at 15 degrees 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.
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