Performance of cathodic nitrate reduction driven by electricity generated from ANAMMOX sludge in anode |
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| Institution: | 1. Shanghai Key Laboratory for Urban Ecological Process and Eco-Restoration, School of Ecology & Environmental Science, East China Normal University, Shanghai 200241, China;2. Department of Environmental Science, Karakoram International University, Main KIU Road, Gilgit 15100, Pakistan;1. Department of Environmental Science and Engineering, Kyung Hee University, Gyeonggi-do, South Korea;2. School of Civil, Environmental and Architectural Engineering, Korea University, Seoul, South Korea |
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| Abstract: | In this study, ANAMMOX sludge was used as anode microbial catalysts to drive electrocatalytic reduction of nitrate in the SnCu-Pd/CFC catalytic cathode with total nitrogen (TN) removal efficiency of ANAMMOX as well as generate electricity without additional carbon and energy source. The system operation with 1.74 Kg·N/m3·d as nitrogen loading rate (NLR) exhibited a TN removal efficiency of 96.3% and obtained the highest nitrogen removal rate (NRR, 1.69 Kg·N/m3·d), increased by 14.9% and 0.30 Kg·N/m3·d compared with open circuit (control group), respectively. Maximum voltage (39.8 mV) and power density (21.20 ± 0.05 mW/m3, standardized to anode surface area) were also observed. Additionally, microbial community analysis revealed community structure of S2anode had an obvious disparity compared with others as the predominant ANAMMOX bacteria (AnAOB) closed to anode surface was evolved from Candidatus_Kuenenia to Candidatus_Brocadia. |
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| Keywords: | ANAMMOX Sludge Microbial fuel cell Nitrogen removal Electricity generation |
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