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

3 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.

Keywords

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

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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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note = "Publisher Copyright: {\textcopyright} 2023, The Author(s), under exclusive licence to Springer-Verlag GmbH Germany, part of Springer Nature.",

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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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JO - Environmental Science and Pollution Research

JF - Environmental Science and Pollution Research

IS - 60

ER -

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

Abstract

Bibliographical note

Keywords

UN SDGs

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