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Laboratory study of nitrification, denitrification and anammox processes in membrane bioreactors considering periodic aeration

Citation

Abbassi, R and Yadav, AK and Huang, S and Jaffe, PR, Laboratory study of nitrification, denitrification and anammox processes in membrane bioreactors considering periodic aeration, Journal of Environmental Management, 142 pp. 53-59. ISSN 0301-4797 (2014) [Refereed Article]

Copyright Statement

Copyright 2014 Elsevier

DOI: doi:10.1016/j.jenvman.2014.03.013

Abstract

The possibility of using membrane bioreactors (MBRs) in simultaneous nitrification-anammox-denitrification (SNAD) by considering periodic aeration cycles was investigated. Two separate reactors were operated to investigate the effect of different anammox biomass in the presence of nitrifying and denitrifying biomass on the final nitrogen removal efficiency. The results illustrated that the reactor with higher anammox biomass was more robust to oxygen cycling. Around 98% Total Nitrogen (TN) and 83% Total Organic Carbon (TOC) removal efficiencies were observed by applying one hour aeration over a four-hour cycle. Decreasing the aeration time to 30, 15, and 2min during a four-hour cycle affected the final TN removal efficiencies. However, the effect of decreasing aeration on the TN removal efficiencies in the reactor with higher anammox biomass was much lower compared to the regular reactor. The nitrous oxide (N2O) emission was a function of aeration as well, and was lower in the reactor with higher anammox biomass. The results of q-PCR analysis confirmed the simultaneous co-existence of nitrifiers, anammox, and denitrifiers in both of the reactors. To simulate the TN removal in these reactors as a function of the aeration time, a new model, based on first order reaction kinetics for both denitrification and anammox was developed and yielded a good agreement with the experimental observations. © 2014 Elsevier Ltd.

Item Details

Item Type:Refereed Article
Keywords:Anammoxic; Denitrification; Kinetic modeling; Membrane-reactor; Microbiology; Nitrification; aeration; anammox bacterium; article; biomass; chemical reaction kinetics; comparative study; denitrification; DNA extraction; DNA template; nitrification
Research Division:Engineering
Research Group:Chemical Engineering
Research Field:Wastewater Treatment Processes
Objective Division:Commercial Services and Tourism
Objective Group:Water and Waste Services
Objective Field:Water Recycling Services (incl. Sewage and Greywater)
Author:Abbassi, R (Dr Rouzbeh Abbassi)
ID Code:94985
Year Published:2014
Deposited By:NC Maritime Engineering and Hydrodynamics
Deposited On:2014-09-22
Last Modified:2014-10-14
Downloads:0

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