Journal
BIORESOURCE TECHNOLOGY
Volume 386, Issue -, Pages -Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2023.129558
Keywords
Bioelectrochemical systems; Energy recovery; Microbial Fuel Cells; Microbial network; Partial Nitrification
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In this study, a single chamber microbial fuel cell (MFC) was used as an influent device for a partial nitrification-sequencing batch reactor (PN-SBR), achieving integrated COD removal and partial nitrification. After 80 days of operation, the nitrite accumulation rate reached 93%, while the COD removal efficiency was 56%. The study also revealed the microbial interaction between MFC and partial nitrification, providing a new strategy for stable ammonia and nitrite supply for mainstream anammox plants.
The chemical oxygen demand (COD) in municipal wastewater has become an obstacle for anammox in main-stream applications. In this study, the single chamber microbial fuel cell (MFC) was installed as an influent device for a partial nitrification-sequencing batch reactor (PN-SBR) to realize integrating COD removal and partial nitrification. After 80 days of operation, the nitrite accumulation rate reached 93%, while the COD removal efficiency was 56%. The output voltage and the power density of MFC were 66.62 mV and 2.40 W/m3, respectively. The content of EPS, especially polysaccharides in the stable phase, has increased compared with the seed sludge. The most dominant genus in MFC anode biofilm and SBR granular sludge was Thauera, which has organic compounds degradation capacity and could degrade nitrate. This study revealed the microbial interac-tion between MFC and partial nitrification and provided a new strategy for stable ammonia and nitrite supply for mainstream anammox plants.
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