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- W2360368082 abstract "An external circulation sequencing batch reactor(ECSBR) was developed to investigate the autotrophic nitrogen removal from municipal wastewater based on a combined partial nitrification and anaerobic ammonium oxidation(ANAMMOX) process.Pulse dosing sulfide to ECSBR was applied to inhibit nitrite-oxidizing bacteria(NOB).The results showed that the NH+4-N concentration of effluent was below 3.78 mg · L-1,the removal efficiency was 88.4%,and the total nitrogen removal rate reached 66.8 g · m-3 · d-1.Before dosing sulfide,a complete nitrification dominated in reactor with a nitrate concentration of 13~22 mg · L-1 in the effluent,and the molar ratio of produced NO-3-N to consumed NH+4-N was more than 0.9.After sulfide was pulse dosed to reactor,the NOB activity was efficiently inhibited and the effluent NO-3-N was reduced to 4.18 mg · L-1.The molar ratio of produced NO-3-N to consumed NH+4-N decreased to 0.17.Most of the influent N was removed in the form of N2,which accounted for 65.4% of the influent N.A partial nitrification associated with ANAMMOX process became the dominant reaction after pulse dosing sulfide.It was also found that NOB inhibition caused by sulfide was reversible that the NOB activity could recover when the sulfide was no longer exposed.The pulse sulfide application can ensure the constant inhibition of sulfide on NOB during operation,which resulted in a better performance and a rapid start-up of the one-stage autotrophic nitrogen removal process." @default.
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- W2360368082 date "2013-01-01" @default.
- W2360368082 modified "2023-09-24" @default.
- W2360368082 title "Nitrite-oxidizing bacteria(NOB) inhibition by pulse sulfide doses in single-stage autotrophic biological nitrogen removal process for municipal wastewater treatment" @default.
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