Abstract
Two integrated microbial fuel cell-membrane bioreactor (MFC-MBR) were developed to treat medium-strength wastewater with simultaneous power generation. Both the systems were operated with photo-sensitized cathode (with TiO2-Activated carbon) with one irradiated by UV-A light (MMT-UV), while the other was not in direct contact with any light sensitization (MMT). In polarization, MMT-UV exhibited higher maximum power density of 494 mW m−2 as compared to MMT (239 mW m−2). Normalized energy recovery was also estimated to be 0.122 kWh m−3 for MMT-UV and 0.058 kWh m−3 for MMT. On the other hand, overall chemical oxygen demand and total Kjeldahl nitrogen removal efficiency were almost similar and high enough ( ̴ 95% and 86–90%, respectively) for these type of two-stage wastewater treatment systems with very less footprint. Hence, the integrated MFC-MBR with TiO2-Activated carbon as cathode-catalyst in presence of UV showed excellent treatability of wastewater with simultaneous bioelectricity generation to reduce the overall energy demand.
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