Modelling of simultaneous nitrogen and thiocyanate removal through coupling thiocyanate-based denitrification with anaerobic ammonium oxidation

Xueming Chen, Linyan Yang, Jing Sun, Xiaohu Dai, Bing-Jie Ni*

*Corresponding author for this work

Research output: Contribution to journalJournal articleResearchpeer-review

Abstract

Thiocyanate (SCN)-based autotrophic denitrification (AD) has recently been demonstrated as a promising technology that could be integrated with anaerobic ammonium oxidation (Anammox) to achieve simultaneous removal of nitrogen and SCN. However, there is still a lack of a complete SCN-based AD model, and the potential microbial competition/synergy between AD bacteria and Anammox bacteria under different operating conditions remains unknown, which significantly hinders the possible application of coupling SCN-based AD with Anammox. To this end, a complete SCN-based AD model was firstly developed and reliably calibrated/validated using experimental datasets. The obtained SCN-based AD model was then integrated with the well-established Anammox model and satisfactorily verified with experimental data from a system coupling AD with Anammox. The integrated model was lastly applied to investigate the impacts of influent NH4 +-N/NO2 -N ratio and SCN concentration on the steady-state microbial composition as well as the removal of nitrogen and SCN. The results showed that the NH4 +-N/NO2 -N ratio in the presence of a certain SCN level should be controlled at a proper value so that the maximum synergy between AD bacteria and Anammox bacteria could be achieved while their competition for NO2 would be minimized. For the simultaneous maximum removal (>95%) of nitrogen and SCN, there existed a negative relationship between the influent SCN concentration and the optimal NH4 +-N/NO2 -N ratio needed. High-level (>95%) simultaneous removal of nitrogen and thiocyanate could be achieved through combining thiocyanate-based autotrophic denitrification and Anammox.

Original languageEnglish
JournalEnvironmental Pollution
Volume253
Pages (from-to)974-980
ISSN0269-7491
DOIs
Publication statusPublished - 2019

Keywords

  • Anaerobic ammonium oxidation
  • Microbial competition
  • Modelling
  • Synergy
  • Thiocyanate-based autotrophic denitrification

Cite this

@article{66657ce3a4ab45d9a931306ca2f1d69b,
title = "Modelling of simultaneous nitrogen and thiocyanate removal through coupling thiocyanate-based denitrification with anaerobic ammonium oxidation",
abstract = "Thiocyanate (SCN−)-based autotrophic denitrification (AD) has recently been demonstrated as a promising technology that could be integrated with anaerobic ammonium oxidation (Anammox) to achieve simultaneous removal of nitrogen and SCN−. However, there is still a lack of a complete SCN−-based AD model, and the potential microbial competition/synergy between AD bacteria and Anammox bacteria under different operating conditions remains unknown, which significantly hinders the possible application of coupling SCN−-based AD with Anammox. To this end, a complete SCN−-based AD model was firstly developed and reliably calibrated/validated using experimental datasets. The obtained SCN−-based AD model was then integrated with the well-established Anammox model and satisfactorily verified with experimental data from a system coupling AD with Anammox. The integrated model was lastly applied to investigate the impacts of influent NH4 +-N/NO2 −-N ratio and SCN− concentration on the steady-state microbial composition as well as the removal of nitrogen and SCN−. The results showed that the NH4 +-N/NO2 −-N ratio in the presence of a certain SCN− level should be controlled at a proper value so that the maximum synergy between AD bacteria and Anammox bacteria could be achieved while their competition for NO2 − would be minimized. For the simultaneous maximum removal (>95{\%}) of nitrogen and SCN−, there existed a negative relationship between the influent SCN− concentration and the optimal NH4 +-N/NO2 −-N ratio needed. High-level (>95{\%}) simultaneous removal of nitrogen and thiocyanate could be achieved through combining thiocyanate-based autotrophic denitrification and Anammox.",
keywords = "Anaerobic ammonium oxidation, Microbial competition, Modelling, Synergy, Thiocyanate-based autotrophic denitrification",
author = "Xueming Chen and Linyan Yang and Jing Sun and Xiaohu Dai and Bing-Jie Ni",
year = "2019",
doi = "10.1016/j.envpol.2019.07.104",
language = "English",
volume = "253",
pages = "974--980",
journal = "Environmental Pollution",
issn = "0269-7491",
publisher = "Pergamon Press",

}

Modelling of simultaneous nitrogen and thiocyanate removal through coupling thiocyanate-based denitrification with anaerobic ammonium oxidation. / Chen, Xueming; Yang, Linyan; Sun, Jing; Dai, Xiaohu; Ni, Bing-Jie.

In: Environmental Pollution, Vol. 253, 2019, p. 974-980.

Research output: Contribution to journalJournal articleResearchpeer-review

TY - JOUR

T1 - Modelling of simultaneous nitrogen and thiocyanate removal through coupling thiocyanate-based denitrification with anaerobic ammonium oxidation

AU - Chen, Xueming

AU - Yang, Linyan

AU - Sun, Jing

AU - Dai, Xiaohu

AU - Ni, Bing-Jie

PY - 2019

Y1 - 2019

N2 - Thiocyanate (SCN−)-based autotrophic denitrification (AD) has recently been demonstrated as a promising technology that could be integrated with anaerobic ammonium oxidation (Anammox) to achieve simultaneous removal of nitrogen and SCN−. However, there is still a lack of a complete SCN−-based AD model, and the potential microbial competition/synergy between AD bacteria and Anammox bacteria under different operating conditions remains unknown, which significantly hinders the possible application of coupling SCN−-based AD with Anammox. To this end, a complete SCN−-based AD model was firstly developed and reliably calibrated/validated using experimental datasets. The obtained SCN−-based AD model was then integrated with the well-established Anammox model and satisfactorily verified with experimental data from a system coupling AD with Anammox. The integrated model was lastly applied to investigate the impacts of influent NH4 +-N/NO2 −-N ratio and SCN− concentration on the steady-state microbial composition as well as the removal of nitrogen and SCN−. The results showed that the NH4 +-N/NO2 −-N ratio in the presence of a certain SCN− level should be controlled at a proper value so that the maximum synergy between AD bacteria and Anammox bacteria could be achieved while their competition for NO2 − would be minimized. For the simultaneous maximum removal (>95%) of nitrogen and SCN−, there existed a negative relationship between the influent SCN− concentration and the optimal NH4 +-N/NO2 −-N ratio needed. High-level (>95%) simultaneous removal of nitrogen and thiocyanate could be achieved through combining thiocyanate-based autotrophic denitrification and Anammox.

AB - Thiocyanate (SCN−)-based autotrophic denitrification (AD) has recently been demonstrated as a promising technology that could be integrated with anaerobic ammonium oxidation (Anammox) to achieve simultaneous removal of nitrogen and SCN−. However, there is still a lack of a complete SCN−-based AD model, and the potential microbial competition/synergy between AD bacteria and Anammox bacteria under different operating conditions remains unknown, which significantly hinders the possible application of coupling SCN−-based AD with Anammox. To this end, a complete SCN−-based AD model was firstly developed and reliably calibrated/validated using experimental datasets. The obtained SCN−-based AD model was then integrated with the well-established Anammox model and satisfactorily verified with experimental data from a system coupling AD with Anammox. The integrated model was lastly applied to investigate the impacts of influent NH4 +-N/NO2 −-N ratio and SCN− concentration on the steady-state microbial composition as well as the removal of nitrogen and SCN−. The results showed that the NH4 +-N/NO2 −-N ratio in the presence of a certain SCN− level should be controlled at a proper value so that the maximum synergy between AD bacteria and Anammox bacteria could be achieved while their competition for NO2 − would be minimized. For the simultaneous maximum removal (>95%) of nitrogen and SCN−, there existed a negative relationship between the influent SCN− concentration and the optimal NH4 +-N/NO2 −-N ratio needed. High-level (>95%) simultaneous removal of nitrogen and thiocyanate could be achieved through combining thiocyanate-based autotrophic denitrification and Anammox.

KW - Anaerobic ammonium oxidation

KW - Microbial competition

KW - Modelling

KW - Synergy

KW - Thiocyanate-based autotrophic denitrification

U2 - 10.1016/j.envpol.2019.07.104

DO - 10.1016/j.envpol.2019.07.104

M3 - Journal article

VL - 253

SP - 974

EP - 980

JO - Environmental Pollution

JF - Environmental Pollution

SN - 0269-7491

ER -