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

Citation

Srivastava, P and Yadav, AK and Garaniya, V and Lewis, T and Abbassi, R and Khan, SJ, Electrode dependent anaerobic ammonium oxidation in microbial fuel cell integrated hybrid constructed wetlands: a new process, Science of The Total Environment, 698 Article 134248. ISSN 0048-9697 (2020) [Refereed Article]

Copyright Statement

2019 Elsevier B.V. All rights reserved

DOI: doi:10.1016/j.scitotenv.2019.134248

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.

Item Details

Item Type:Refereed Article
Keywords:anaerobic ammonium oxidation, hybrid constructed wetlands, constructed wetland-microbial fuel cell, organic matter and nitrogen removal
Research Division:Engineering
Research Group:Chemical Engineering
Research Field:Wastewater Treatment Processes
Objective Division:Environment
Objective Group:Ecosystem Assessment and Management
Objective Field:Ecosystem Assessment and Management of Marine Environments
UTAS Author:Srivastava, P (Miss KM Pratiksha Srivastava)
UTAS Author:Garaniya, V (Dr Vikram Garaniya)
UTAS Author:Lewis, T (Associate Professor Trevor Lewis)
ID Code:134924
Year Published:2020 (online first 2019)
Deposited By:AMC Governance Office
Deposited On:2019-09-13
Last Modified:2020-01-10
Downloads:0

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