Effect of nitrogen loading rate and alkalinity on partial nitritation in a continuous stirred tank reactor

Daehee Choi; Thanh Phuong To; Wonsang Yun; Dongjin Ju; Keugtae Kim; Jinyoung Jung

doi:10.4491/eer.2020.573

Effect of nitrogen loading rate and alkalinity on partial nitritation in a continuous stirred tank reactor

Daehee Choi
, Thanh Phuong To
, Wonsang Yun
, Dongjin Ju
, Keugtae Kim
, Jinyoung Jung

Department of Biological and Environmental Science

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

12 Scopus citations

Abstract

In order to achieve an appropriate effluent ratio of ammonium and nitrite as an influent of the anaerobic ammonium oxidation process, the optimum conditions for the partial nitritation in a continuous stirred tank reactor (CSTR) were investigated using real reject water. Hydraulic retention time (HRT) and influent alkalinity (HCO₃^-)/NH₄⁺-N ratio were major factors that greatly influenced the partial nitritation. As a result of continuous operation, ammonium conversion efficiency (ACE) and effluent nitrite to ammonium ratio (NAR) could be achieved at the HRT of 19 h corresponding to 0.71 kg/m³/d of nitrogen loading rate (NLR). Thereafter, the influent HCO₃^-/NH₄⁺-N ratio was adjusted from 0.5 to 2, and as a result, the optimum partial nitritation efficiency was maintained when the influent HCO₃^-/NH₄⁺-N ratio was one. The suitability of the determined operating conditions was verified in a CSTR over 30 d of operation time.

Original language	English
Article number	200573
Journal	Environmental Engineering Research
Volume	27
Issue number	1
DOIs	https://doi.org/10.4491/eer.2020.573
State	Published - 2022

Keywords

AOB
HCO/NH-N ratio
NLR
NOB
Partial nitritation

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10.4491/eer.2020.573

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@article{c60cb322bc3744efa68ac996ccebeb21,

title = "Effect of nitrogen loading rate and alkalinity on partial nitritation in a continuous stirred tank reactor",

abstract = "In order to achieve an appropriate effluent ratio of ammonium and nitrite as an influent of the anaerobic ammonium oxidation process, the optimum conditions for the partial nitritation in a continuous stirred tank reactor (CSTR) were investigated using real reject water. Hydraulic retention time (HRT) and influent alkalinity (HCO3-)/NH4+-N ratio were major factors that greatly influenced the partial nitritation. As a result of continuous operation, ammonium conversion efficiency (ACE) and effluent nitrite to ammonium ratio (NAR) could be achieved at the HRT of 19 h corresponding to 0.71 kg/m3/d of nitrogen loading rate (NLR). Thereafter, the influent HCO3-/NH4+-N ratio was adjusted from 0.5 to 2, and as a result, the optimum partial nitritation efficiency was maintained when the influent HCO3-/NH4+-N ratio was one. The suitability of the determined operating conditions was verified in a CSTR over 30 d of operation time.",

keywords = "AOB, HCO/NH-N ratio, NLR, NOB, Partial nitritation",

author = "Daehee Choi and To, \{Thanh Phuong\} and Wonsang Yun and Dongjin Ju and Keugtae Kim and Jinyoung Jung",

note = "Publisher Copyright: {\textcopyright} 2022 Korean Society of Environmental Engineers.",

year = "2022",

doi = "10.4491/eer.2020.573",

language = "English",

volume = "27",

journal = "Environmental Engineering Research",

issn = "1226-1025",

publisher = "Korean Society of Environmental Engineers",

number = "1",

}

TY - JOUR

T1 - Effect of nitrogen loading rate and alkalinity on partial nitritation in a continuous stirred tank reactor

AU - Choi, Daehee

AU - To, Thanh Phuong

AU - Yun, Wonsang

AU - Ju, Dongjin

AU - Kim, Keugtae

AU - Jung, Jinyoung

PY - 2022

Y1 - 2022

N2 - In order to achieve an appropriate effluent ratio of ammonium and nitrite as an influent of the anaerobic ammonium oxidation process, the optimum conditions for the partial nitritation in a continuous stirred tank reactor (CSTR) were investigated using real reject water. Hydraulic retention time (HRT) and influent alkalinity (HCO3-)/NH4+-N ratio were major factors that greatly influenced the partial nitritation. As a result of continuous operation, ammonium conversion efficiency (ACE) and effluent nitrite to ammonium ratio (NAR) could be achieved at the HRT of 19 h corresponding to 0.71 kg/m3/d of nitrogen loading rate (NLR). Thereafter, the influent HCO3-/NH4+-N ratio was adjusted from 0.5 to 2, and as a result, the optimum partial nitritation efficiency was maintained when the influent HCO3-/NH4+-N ratio was one. The suitability of the determined operating conditions was verified in a CSTR over 30 d of operation time.

AB - In order to achieve an appropriate effluent ratio of ammonium and nitrite as an influent of the anaerobic ammonium oxidation process, the optimum conditions for the partial nitritation in a continuous stirred tank reactor (CSTR) were investigated using real reject water. Hydraulic retention time (HRT) and influent alkalinity (HCO3-)/NH4+-N ratio were major factors that greatly influenced the partial nitritation. As a result of continuous operation, ammonium conversion efficiency (ACE) and effluent nitrite to ammonium ratio (NAR) could be achieved at the HRT of 19 h corresponding to 0.71 kg/m3/d of nitrogen loading rate (NLR). Thereafter, the influent HCO3-/NH4+-N ratio was adjusted from 0.5 to 2, and as a result, the optimum partial nitritation efficiency was maintained when the influent HCO3-/NH4+-N ratio was one. The suitability of the determined operating conditions was verified in a CSTR over 30 d of operation time.

KW - AOB

KW - HCO/NH-N ratio

KW - NLR

KW - NOB

KW - Partial nitritation

UR - https://www.scopus.com/pages/publications/85141499175

U2 - 10.4491/eer.2020.573

DO - 10.4491/eer.2020.573

M3 - Article

AN - SCOPUS:85141499175

SN - 1226-1025

VL - 27

JO - Environmental Engineering Research

JF - Environmental Engineering Research

IS - 1

M1 - 200573

ER -

Effect of nitrogen loading rate and alkalinity on partial nitritation in a continuous stirred tank reactor

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Keywords

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