Electrode dependent anaerobic ammonium oxidation in microbial fuel cell integrated hybrid constructed wetlands: a new process

Pratiksha Srivastava, Asheesh Kumar Yadav, Vikram Garaniya, Trevor Lewis, Rouzbeh Abbassi, Stuart J. Khan

Research output: Contribution to journalArticleResearchpeer-review

Abstract

This study provides a new approach of electrode dependent anaerobic ammonium oxidation (electroanammox) in microbial fuel cell (MFC) integrated hybrid constructed wetlands (CWs). The study was carried out in three CWs, each with a horizontal flow (HF) followed by a vertical upflow (VUF). Two of the CWs were integrated with MFC, one was operated in closed circuit (CL) mode and the other in open circuit (OP) mode to determine the influence of electron transfer through an external electrical circuit. The initial nitrogen and carbon concentration were 40 mg/l and 880 mg/l respectively. The total nitrogen (TN), NH4+-N, TOC and COD removal achieved in CW-MFC-CL were 90.0 ± 1.15%, 94.4 ± 0.75%, 64.8 ± 3.0% and up to 99.5 ± 3.4%, respectively. The TN and NH4+-N removal in CW-MFC-CL was 20.0% and 13.6% higher than normal CW. Maximum current density achieved in CW-MFC-HF was of 75 mA/m3 and in CW-MFC-VUF was 156 mA/m3. Furthermore, the study revealed that even at low microbiological biomass, an MFC integrated CW operating in closed circuit gave higher removal of NH4+-N and COD than the normal CW and open circuit CW-MFC. Microbiological analysis shows the presence of already known nitrifier and denitrifer which indicates their role in electrode dependent nitrogen removal.
LanguageEnglish
Article number134248
Number of pages11
JournalScience of the Total Environment
Volume698
DOIs
Publication statusPublished - 1 Jan 2020

Fingerprint

Microbial fuel cells
Wetlands
fuel cell
constructed wetland
Ammonium Compounds
electrode
ammonium
oxidation
Oxidation
Electrodes
Networks (circuits)
Nitrogen
nitrogen
Nitrogen removal
density current
Biomass
Current density
Carbon

Keywords

  • Anaerobic ammonium oxidation
  • Hybrid constructed wetlands
  • Constructed wetland-microbial fuel cell
  • Organic matter and nitrogen removal

Cite this

Srivastava, Pratiksha ; Kumar Yadav, Asheesh ; Garaniya, Vikram ; Lewis, Trevor ; Abbassi, Rouzbeh ; J. Khan, Stuart. / Electrode dependent anaerobic ammonium oxidation in microbial fuel cell integrated hybrid constructed wetlands : a new process. In: Science of the Total Environment. 2020 ; Vol. 698.
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abstract = "This study provides a new approach of electrode dependent anaerobic ammonium oxidation (electroanammox) in microbial fuel cell (MFC) integrated hybrid constructed wetlands (CWs). The study was carried out in three CWs, each with a horizontal flow (HF) followed by a vertical upflow (VUF). Two of the CWs were integrated with MFC, one was operated in closed circuit (CL) mode and the other in open circuit (OP) mode to determine the influence of electron transfer through an external electrical circuit. The initial nitrogen and carbon concentration were 40 mg/l and 880 mg/l respectively. The total nitrogen (TN), NH4+-N, TOC and COD removal achieved in CW-MFC-CL were 90.0 ± 1.15{\%}, 94.4 ± 0.75{\%}, 64.8 ± 3.0{\%} and up to 99.5 ± 3.4{\%}, respectively. The TN and NH4+-N removal in CW-MFC-CL was 20.0{\%} and 13.6{\%} higher than normal CW. Maximum current density achieved in CW-MFC-HF was of 75 mA/m3 and in CW-MFC-VUF was 156 mA/m3. Furthermore, the study revealed that even at low microbiological biomass, an MFC integrated CW operating in closed circuit gave higher removal of NH4+-N and COD than the normal CW and open circuit CW-MFC. Microbiological analysis shows the presence of already known nitrifier and denitrifer which indicates their role in electrode dependent nitrogen removal.",
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Electrode dependent anaerobic ammonium oxidation in microbial fuel cell integrated hybrid constructed wetlands : a new process. / Srivastava, Pratiksha ; Kumar Yadav, Asheesh; Garaniya, Vikram; Lewis, Trevor ; Abbassi, Rouzbeh; J. Khan, Stuart.

In: Science of the Total Environment, Vol. 698, 134248, 01.01.2020.

Research output: Contribution to journalArticleResearchpeer-review

TY - JOUR

T1 - Electrode dependent anaerobic ammonium oxidation in microbial fuel cell integrated hybrid constructed wetlands

T2 - Science of the Total Environment

AU - Srivastava, Pratiksha

AU - Kumar Yadav, Asheesh

AU - Garaniya, Vikram

AU - Lewis, Trevor

AU - Abbassi, Rouzbeh

AU - J. Khan, Stuart

PY - 2020/1/1

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N2 - This study provides a new approach of electrode dependent anaerobic ammonium oxidation (electroanammox) in microbial fuel cell (MFC) integrated hybrid constructed wetlands (CWs). The study was carried out in three CWs, each with a horizontal flow (HF) followed by a vertical upflow (VUF). Two of the CWs were integrated with MFC, one was operated in closed circuit (CL) mode and the other in open circuit (OP) mode to determine the influence of electron transfer through an external electrical circuit. The initial nitrogen and carbon concentration were 40 mg/l and 880 mg/l respectively. The total nitrogen (TN), NH4+-N, TOC and COD removal achieved in CW-MFC-CL were 90.0 ± 1.15%, 94.4 ± 0.75%, 64.8 ± 3.0% and up to 99.5 ± 3.4%, respectively. The TN and NH4+-N removal in CW-MFC-CL was 20.0% and 13.6% higher than normal CW. Maximum current density achieved in CW-MFC-HF was of 75 mA/m3 and in CW-MFC-VUF was 156 mA/m3. Furthermore, the study revealed that even at low microbiological biomass, an MFC integrated CW operating in closed circuit gave higher removal of NH4+-N and COD than the normal CW and open circuit CW-MFC. Microbiological analysis shows the presence of already known nitrifier and denitrifer which indicates their role in electrode dependent nitrogen removal.

AB - This study provides a new approach of electrode dependent anaerobic ammonium oxidation (electroanammox) in microbial fuel cell (MFC) integrated hybrid constructed wetlands (CWs). The study was carried out in three CWs, each with a horizontal flow (HF) followed by a vertical upflow (VUF). Two of the CWs were integrated with MFC, one was operated in closed circuit (CL) mode and the other in open circuit (OP) mode to determine the influence of electron transfer through an external electrical circuit. The initial nitrogen and carbon concentration were 40 mg/l and 880 mg/l respectively. The total nitrogen (TN), NH4+-N, TOC and COD removal achieved in CW-MFC-CL were 90.0 ± 1.15%, 94.4 ± 0.75%, 64.8 ± 3.0% and up to 99.5 ± 3.4%, respectively. The TN and NH4+-N removal in CW-MFC-CL was 20.0% and 13.6% higher than normal CW. Maximum current density achieved in CW-MFC-HF was of 75 mA/m3 and in CW-MFC-VUF was 156 mA/m3. Furthermore, the study revealed that even at low microbiological biomass, an MFC integrated CW operating in closed circuit gave higher removal of NH4+-N and COD than the normal CW and open circuit CW-MFC. Microbiological analysis shows the presence of already known nitrifier and denitrifer which indicates their role in electrode dependent nitrogen removal.

KW - Anaerobic ammonium oxidation

KW - Hybrid constructed wetlands

KW - Constructed wetland-microbial fuel cell

KW - Organic matter and nitrogen removal

U2 - 10.1016/j.scitotenv.2019.134248

DO - 10.1016/j.scitotenv.2019.134248

M3 - Article

VL - 698

JO - Science of the Total Environment

JF - Science of the Total Environment

SN - 0048-9697

M1 - 134248

ER -