Important effects of temperature on treating real municipal wastewater by a submerged anaerobic membrane bioreactor: Removal efficiency, biogas, and microbial community

A submerged anaerobic membrane bioreactor (SAnMBR) was used in the treatment of real municipal wastewater at operation temperatures ranging from 15 °C to 25 and hydraulic retention time (HRT) 6 h. The process evaluated terms organic removal efficiency, biogas production, sludge growth filtration. During long-term operation, SAnMBR achieved chemical oxygen demand efficiencies about 90% with a low yield (0.12–0.19 g-VSS/g-CODrem) 20–25 °C. Approximately 1.82–2.27 kWh/d electric energy generated during °C, 0.67 microbial community analysis results showed that dominated by aceticlastic methanogens, coupled hydrogenotrophic methanogens very small quantity methylotrophic methanogens. It also shown stabilization could be attributed carbohydrate-protein degrading bacteria carbohydrate bacteria.