Title

The Impact Of Temperature And Gas-Phase Oxygen On Kinetics Of In Situ Ammonia Removal In Bioreactor Landfill Leachate

Keywords

Aerobic; Ammonia; Bioreactor landfill; Denitrification; Nitrification

Abstract

Microcosm experiments aimed at defining a rate equation that describes how different environmental conditions (i.e., gas-phase oxygen concentrations, temperature and ammonia concentration) may impact in situ ammonia removal were conducted. Results indicate that ammonia removal can readily occur at various gas-phase oxygen levels (between 0.7% and 100%) and over a range of temperatures (22, 35 and 45 °C). Slowest rates occurred with lower gas-phase oxygen concentrations. All rate data, except at 45 °C and 5% oxygen, fit well (r2=0.75) to a multiplicative Monod equation with terms describing the impact of oxygen, pH, temperature and ammonia concentration. All ammonia half-saturation values are relatively high when compared to those generally found in wastewater treatment, suggesting that the rate may be affected by the mass transfer of oxygen and/or ammonia. Additionally, as the temperature increases, the ammonia half-saturation value also increases. The multiplicative Monod model developed can be used to aid in designing and operating field-scale studies. © 2007 Elsevier Ltd. All rights reserved.

Publication Date

1-1-2007

Publication Title

Water Research

Volume

41

Issue

9

Number of Pages

1907-1914

Document Type

Article

Personal Identifier

scopus

DOI Link

https://doi.org/10.1016/j.watres.2007.01.049

Socpus ID

34047150393 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/34047150393

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