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Large pilot-scale submerged anaerobic membrane bioreactor for the treatment of municipal wastewater and biogas production at 25 °C

2020; Elsevier BV; Volume: 319; Linguagem: Inglês

10.1016/j.biortech.2020.124123

1873-2976

Zhe Kong, Jiang Wu, Chao Rong, Tianjie Wang, Lu Li, Zibin Luo, Jiayuan Ji, Taira Hanaoka, Shinichi Sakemi, Masami Ito, Shigeki Kobayashi, Masumi Kobayashi, Yu Qin, Yu‐You Li,

Solar-Powered Water Purification Methods

The aim of this work was to demonstrate the operation of a large pilot-scale submerged anaerobic membrane bioreactor (5.0 m3) for biogas production from municipal wastewater at ambient temperature of 25 °C. To the best of our knowledge, this is the largest one-stage submerged AnMBR that has ever been reported. This AnMBR realized a hydraulic retention time (HRT) of 6 h and a treatment capacity of 20 m3 d-1, obtaining excellent effluent quality with COD removal efficiency over 90% and BOD5 removal over 95%. The biogas yield of the AnMBR was 0.25–0.27 L g−1 removed COD and 0.09–0.10 L L-1 raw wastewater. The methane content of the biogas was at the range of 75%-81%. The COD and nitrogen mass balance were also identified based on long-term operation. The hollow-fiber membrane module realized a flux of 2.75–17.83 LMH. An online backwash chemical cleaning system helped to lower the transmembrane pressure timely.