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- W3170193048 endingPage "108071" @default.
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- W3170193048 abstract "• Sulfide addition could induce autotrophic denitrification coupling with CANON process. • 0.5−5 mg L −1 sulfide effectively improved TN removal of CANON process. • 50 mg L −1 sulfide was the inhibition threshold on AAOB abundance. • CANON process had adaption ability to sulfide and alleviated inhibition after acclimatization. • HAO and Heme-c decreased with the high sulfide addition and had adaption ability. Simultaneous removal of nitrogen and sulfur pollutants was an urgent issue since they coexisted in many kinds of wastewater and led to the black-odor water. In this study, sulfide was step-wise increased and added to the completely autotrophic nitrogen removal (CANON) system, to investigate its impact. Results showed that autotrophic denitrification was successfully induced and then improved the total nitrogen removal efficiency (TNRE) to 91.9 % from 83.7 %, when 0−5 mg L −1 sulfide was supplied. However, 50 mg L −1 sulfide significantly decreased TNRE to 42.9 %, together with the decrease of hydroxylamine oxidoreductase activity to 1.05 from 1.77 EU g −1 SS and Heme-c to 0.15 from 0.28 μM g −1 SS. CANON system can resist the sulfide shock after acclimatization, the TNRE slightly decreased to 82.9 % when 50 mg L −1 sulfide was supplied again. Prominent nitrogen removal was achieved in CANON system with 5 mg L −1 sulfide, by the cooperative contribution of CANON bacteria (5.77 % Nitrosomonas, 20.2 % Candidatus Kuenenia) and denitrifying bacteria (7.52 % Truepera, 1.79 % Denitratisoma and 3.72 % Arenimonas)." @default.
- W3170193048 created "2021-06-22" @default.
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- W3170193048 date "2021-09-01" @default.
- W3170193048 modified "2023-10-13" @default.
- W3170193048 title "Impact of increasing sulfide addition on the nitrogen removal and microbial community of CANON process in membrane bioreactor" @default.
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- W3170193048 doi "https://doi.org/10.1016/j.bej.2021.108071" @default.
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