Model-based evaluation of simultaneous nitrification and denitrification in aerobic granular sludge systems

Güçlü Insel; Gulsum Yilmaz; Ferenc Hazi; Nazik Artan

doi:10.1007/s11356-023-25252-w

Model-based evaluation of simultaneous nitrification and denitrification in aerobic granular sludge systems

Güçlü Insel, Gulsum Yilmaz^*, Ferenc Hazi, Nazik Artan

^*Corresponding author for this work

Department of Environmental Engineering

Research output: Contribution to journal › Article › peer-review

6 Citations (Scopus)

Abstract

A lab-scale granular sludge sequencing batch reactor (G-SBR) system was operated using synthetic wastewater. The total nitrogen removal efficiency of 85% was obtained together with the achievement of complete total phosphorus removal with average granule diameter of 400 µm. Dual-step nitrification and denitrification model with fixed biofilm thickness was used for performance analysis. The denitrification mode only contributed to TN removal with 25% which can be calculated with process stoichiometry. The remaining nitrogen removal could be explained by simulating simultaneous nitrification and denitrification which was responsible for 75% denitrification during aerobic period. In addition, low NO₃⁻ concentration at the beginning of the fill period provided advantage for securing a prolonged anaerobic period for enhanced biological phosphorus removal (EBPR). The model parameters of boundary layer thickness (z _BL = 50 µm) and half-saturation of O₂ for nitrite-oxidizing bacteria (K _O2,NOB = 0.5 gO₂/m³) were tuned to fit NO₂ and NO₃ profiles in SBR cycle. Graphical Abstract: [Figure not available: see fulltext.].

Original language	English
Pages (from-to)	124780-124789
Number of pages	10
Journal	Environmental Science and Pollution Research
Volume	30
Issue number	60
DOIs	https://doi.org/10.1007/s11356-023-25252-w
Publication status	Published - Dec 2023

Bibliographical note

Publisher Copyright:
© 2023, The Author(s), under exclusive licence to Springer-Verlag GmbH Germany, part of Springer Nature.

Funding

This work was funded by The Scientific and Technological Research Council of Turkey, TUBITAK (Project No: 107Y137), and the Research Foundation of Istanbul University (Project No: 613/15122006).

Funders	Funder number
Istanbul Üniversitesi	613/15122006
Türkiye Bilimsel ve Teknolojik Araştırma Kurumu	107Y137

Keywords

Aerobic granular sludge
Enhanced biological phosphorus removal
Modeling
Simultaneous nitrification and denitrification

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

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10.1007/s11356-023-25252-w

Cite this

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title = "Model-based evaluation of simultaneous nitrification and denitrification in aerobic granular sludge systems",

abstract = "A lab-scale granular sludge sequencing batch reactor (G-SBR) system was operated using synthetic wastewater. The total nitrogen removal efficiency of 85% was obtained together with the achievement of complete total phosphorus removal with average granule diameter of 400 µm. Dual-step nitrification and denitrification model with fixed biofilm thickness was used for performance analysis. The denitrification mode only contributed to TN removal with 25% which can be calculated with process stoichiometry. The remaining nitrogen removal could be explained by simulating simultaneous nitrification and denitrification which was responsible for 75% denitrification during aerobic period. In addition, low NO3− concentration at the beginning of the fill period provided advantage for securing a prolonged anaerobic period for enhanced biological phosphorus removal (EBPR). The model parameters of boundary layer thickness (z BL = 50 µm) and half-saturation of O2 for nitrite-oxidizing bacteria (K O2,NOB = 0.5 gO2/m3) were tuned to fit NO2 and NO3 profiles in SBR cycle. Graphical Abstract: [Figure not available: see fulltext.].",

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T1 - Model-based evaluation of simultaneous nitrification and denitrification in aerobic granular sludge systems

AU - Insel, Güçlü

AU - Yilmaz, Gulsum

AU - Hazi, Ferenc

AU - Artan, Nazik

PY - 2023/12

Y1 - 2023/12

N2 - A lab-scale granular sludge sequencing batch reactor (G-SBR) system was operated using synthetic wastewater. The total nitrogen removal efficiency of 85% was obtained together with the achievement of complete total phosphorus removal with average granule diameter of 400 µm. Dual-step nitrification and denitrification model with fixed biofilm thickness was used for performance analysis. The denitrification mode only contributed to TN removal with 25% which can be calculated with process stoichiometry. The remaining nitrogen removal could be explained by simulating simultaneous nitrification and denitrification which was responsible for 75% denitrification during aerobic period. In addition, low NO3− concentration at the beginning of the fill period provided advantage for securing a prolonged anaerobic period for enhanced biological phosphorus removal (EBPR). The model parameters of boundary layer thickness (z BL = 50 µm) and half-saturation of O2 for nitrite-oxidizing bacteria (K O2,NOB = 0.5 gO2/m3) were tuned to fit NO2 and NO3 profiles in SBR cycle. Graphical Abstract: [Figure not available: see fulltext.].

AB - A lab-scale granular sludge sequencing batch reactor (G-SBR) system was operated using synthetic wastewater. The total nitrogen removal efficiency of 85% was obtained together with the achievement of complete total phosphorus removal with average granule diameter of 400 µm. Dual-step nitrification and denitrification model with fixed biofilm thickness was used for performance analysis. The denitrification mode only contributed to TN removal with 25% which can be calculated with process stoichiometry. The remaining nitrogen removal could be explained by simulating simultaneous nitrification and denitrification which was responsible for 75% denitrification during aerobic period. In addition, low NO3− concentration at the beginning of the fill period provided advantage for securing a prolonged anaerobic period for enhanced biological phosphorus removal (EBPR). The model parameters of boundary layer thickness (z BL = 50 µm) and half-saturation of O2 for nitrite-oxidizing bacteria (K O2,NOB = 0.5 gO2/m3) were tuned to fit NO2 and NO3 profiles in SBR cycle. Graphical Abstract: [Figure not available: see fulltext.].

KW - Aerobic granular sludge

KW - Enhanced biological phosphorus removal

KW - Modeling

KW - Simultaneous nitrification and denitrification

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ER -

Model-based evaluation of simultaneous nitrification and denitrification in aerobic granular sludge systems

Abstract

Bibliographical note

Funding

Keywords

UN SDGs

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