(Invited) Bioelectrochemical Systems for Resource Recovery and H2 Production from Wastewater
ECS Meeting Abstracts(2021)
摘要
Wastewaters contain abundant nutrients and energy, which can be recovered by using proper bioelectrochemical systems. We developed a three-chamber resource recovery microbial fuel cell (RRMFC) to treat synthetic urine-containing wastewater with various organic pollutants and simultaneously recover nutrients (e.g., N, P, and S). Over one cycle (∼3 days), 99% of urea, 97% of COD, 99% of histidine, 91% of creatinine, 99% of sodium acetate, 98% of SO42−, and 99% of PO43− were removed from the wastewater, and simultaneously 42% of total nitrogen, 37% of PO43−, 59% of SO42−, and 33% of total salts were recovered from the wastewater. We also developed a solar microbial electrolysis cell (solar-MEC) with a Fe2O3 photoanode, a bioanode, and a black-silicon (b-Si) photocathode for H2 production from wastewater without external bias. The solar-MEC had a maximum current density of 0.8 mA/cm2 and an average H2 production rate of 5.1 µmol/h/cm2 under one sun irradiation.
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关键词
bioelectrochemical systems,wastewater,h2 production,resource recovery
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