Start-up and operational performance of the partial nitrification process in a sequencing batch reactor (SBR) coupled with a micro-aeration system

Duan, Ying; Liu, Yusheng; Zhang, Mingmei; Li, Yangyang; Zhu, Wei; Hao, Mengya; Ma, Shuya

doi:10.1016/j.biortech.2019.122311

Cited by 27 publications

(9 citation statements)

References 23 publications

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“…The traditional SBR is an integrated nitrification-denitrification process, during which ammonia (NH3-N) is first oxidized to nitrite (NO2-N), followed by NO2-N to NO3-N oxidation and final production of nitrogen gas (N2) (S Abubakar, Latiff, Lawal, & Jagaba, 2016; Y. Duan et al, 2020). It blends both anaerobic and aerobic stages to successfully achieve nitrification, denitrification and phosphorous removal concurrently (SNDPR) (S. X.…”

Section: Leachate Transfer Processes Fecl3fecfecl3mentioning

confidence: 99%

Sequencing batch reactor technology for landfill leachate treatment: A state-of-the-art review

Jagaba

Kutty

Lawal

et al. 2021

Journal of Environmental Management

132

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Section: Leachate Transfer Processes Fecl3fecfecl3mentioning

confidence: 99%

Sequencing batch reactor technology for landfill leachate treatment: A state-of-the-art review

Jagaba

Kutty

Lawal

et al. 2021

Journal of Environmental Management

132

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“…10,11 On the one hand, controlling the DO concentration has been consistently considered as the critical parameter for achieving a high-performance nitritation. 5,6,8,12,13 On the other, most nitritation studies available in the literature have been performed in sequencing batch reactors (SBR). 10,11,14 SBR configuration offers the flexibility to sequentially set aerobic (i.e.…”

Section: Introductionmentioning

confidence: 99%

“…denitrification/ autotrophic nitrogen removal phase) in the same reactor without requiring a separate clarifier. 5,13,14 Hence, most information of the parameters governing nitritation processes has been retrieved from SBR systems. However, SBR configuration may not be the best choice when continuous nitrogen removal is required or when a continuous nitrite supply is required in other processes, such as anoxic biogas purification.…”

Section: Introductionmentioning

confidence: 99%

“…Operational parameters such as temperature, pH, carbon/nitrogen (C:N) ratio, and dissolved O 2 concentration (DO) are the most reported factors to be controlled for establishing nitritation processes 10,11 . On the one hand, controlling the DO concentration has been consistently considered as the critical parameter for achieving a high‐performance nitritation 5,6,8,12,13 . On the other, most nitritation studies available in the literature have been performed in sequencing batch reactors (SBR) 10,11,14 .…”

Section: Introductionmentioning

confidence: 99%

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Ammonium load determines the performance of a continuous nitritation process and the related microbial communities even under excesses of O₂ supply

Aguilar‐Pichardo

Valenzuela

Quijano

2022

J of Chemical Tech & Biotech

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Background: Partial oxidation of ammonium to nitrite, process known as nitritation, has important advantages over complete nitrification, including energy savings due to a reduced aeration, a lower organic carbon requirement for denitrification, a reduced production of sludge, and the potential use of nitrite in anammox and anoxic biogas purification technologies. Dissolved O 2 (DO) concentration commonly has been regarded as the most important parameter to be controlled for achieving a successful nitritation process.Results: The present study showed that setting average DO values below 1 g O 2 m −3 was insufficient to achieve a high and stable nitritation at ammonium loading rates between 2.5 to 5.1 g N-NH 4 + m −3 h −1 . Under these conditions, the predominance of nitrite oxidizing bacteria (NOB) resulted in ammonium oxidation selectivity to nitrite from 5.2 ± 3.6% to 42.8 ± 21%. Increasing the ammonium loading to 10.1 gN-NH 4 + m −3 h −1 together with an average DO value of 0.9 ± 0.6 gO 2 m −3 resulted in an ammonium oxidation efficiency of 94 ± 1.1% and ammonium oxidation selectivity to nitrite >90%. Conclusion:Continuous nitritation was achieved in a single reactor provided with an easy-to-implement aeration strategy. The ammonium loading rate was the most important parameter to be controlled, which inhibited NOB above a threshold value. NOB inhibition was mediated mainly by free nitrous acid, and by free ammonia to a lesser extent. Increasing the ammonium loading rate led to an enrichment of ammonium oxidizing bacteria of the Nitrosomonas genus.

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“…Li et al [10] reported that the optimal temperature for AOB and anaerobic ammonium oxidizing bacteria (AnAOB) for partial nitrification was 35 • C. A suitable pH for the partial nitrification process was 6.5-8.5. When the pH was higher than 8.5, the partial nitrification was inhibited and the alkaline consumption was increased [11]. Soliman et al [12] reported that the inhibition limit for NOB was 0.1-1.0 mg N/L and the inhibition limit for AOB was 10-150 mg N/L of FA.…”

Section: Introductionmentioning

confidence: 99%

Simultaneous Partial Nitrification and Denitrification Maintained in Membrane Bioreactor for Nitrogen Removal and Hydrogen Autotrophic Denitrification for Further Treatment

et al. 2021

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Low C/N wastewater results from a wide range of factors that significantly harm the environment. They include insufficient carbon sources, low denitrification efficiency, and NH4+-N concentrations in low C/N wastewater that are too high to be treated. In this research, the membrane biofilm reactor and hydrogen-based membrane biofilm reactor (MBR-MBfR) were optimized and regulated under different operating parameters: the simulated domestic sewage with low C/N was domesticated and the domestic sewage was then denitrified. The results of the MBR-MBfR experiments indicated that a C/N ratio of two was suitable for NH4+-N, NO2−-N, NO3−-N, and chemical oxygen demand (COD) removal in partial nitrification-denitrification (PN-D) and hydrogen autotrophic denitrification for further treatment. The steady state for domestic wastewater was reached when the MBR-MBfR in the experimental conditions of HRT = 15 h, SRT = 20 d, 0.04 Mpa for H2 pressure in MBfR, 0.4–0.8 mg/L DO in MBR, MLSS = 2500 mg/L(MBR) and 2800 mg/L(MBfR), and effluent concentrations of NH4+-N, NO3−-N, and NO2−-N were 4.3 ± 0.5, 1.95 ± 0.04, and 2.05 ± 0.15 mg/L, respectively. High-throughput sequencing results revealed the following: (1) The genus Nitrosomonas as the ammonia oxidizing bacteria (AOB) and Denitratisoma as potential denitrifiers were simultaneously enriched in the MBR; (2) at the genus level, Meiothermus,Lentimicrobium, Thauera,Hydrogenophaga, and Desulfotomaculum played a dominant role in leading to NO3−-N and NO2−-N removal in the MBfR.

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Start-up and operational performance of the partial nitrification process in a sequencing batch reactor (SBR) coupled with a micro-aeration system

Cited by 27 publications

References 23 publications

Sequencing batch reactor technology for landfill leachate treatment: A state-of-the-art review

Sequencing batch reactor technology for landfill leachate treatment: A state-of-the-art review

Ammonium load determines the performance of a continuous nitritation process and the related microbial communities even under excesses of O₂ supply

Simultaneous Partial Nitrification and Denitrification Maintained in Membrane Bioreactor for Nitrogen Removal and Hydrogen Autotrophic Denitrification for Further Treatment

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Start-up and operational performance of the partial nitrification process in a sequencing batch reactor (SBR) coupled with a micro-aeration system

Cited by 27 publications

References 23 publications

Sequencing batch reactor technology for landfill leachate treatment: A state-of-the-art review

Sequencing batch reactor technology for landfill leachate treatment: A state-of-the-art review

Ammonium load determines the performance of a continuous nitritation process and the related microbial communities even under excesses of O2 supply

Simultaneous Partial Nitrification and Denitrification Maintained in Membrane Bioreactor for Nitrogen Removal and Hydrogen Autotrophic Denitrification for Further Treatment

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Ammonium load determines the performance of a continuous nitritation process and the related microbial communities even under excesses of O₂ supply