Title

The impact of temperature and gas-phase oxygen on kinetics of in situ ammonia removal in bioreactor landfill leachate

Authors

Authors

N. D. Berge; D. R. Reinhart; J. D. Dietz;T. Townsend

Comments

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Abbreviated Journal Title

Water Res.

Keywords

bioreactor landfill; aerobic; ammonia; nitrification; denitrification; DISSOLVED-OXYGEN; NITRIFICATION KINETICS; NITROGEN MANAGEMENT; ACTIVATED-SLUDGE; BIOFILTERS; WASTE; Engineering, Environmental; Environmental Sciences; Water Resources

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 degrees C). Slowest rates occurred with lower gas-phase oxygen concentrations. All rate data, except at 45 degrees C and 5% oxygen, fit well (r(2) = 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. (c) 2007 Elsevier Ltd. All rights reserved.

Journal Title

Water Research

Volume

41

Issue/Number

9

Publication Date

1-1-2007

Document Type

Article

Language

English

First Page

1907

Last Page

1914

WOS Identifier

WOS:000246588200008

ISSN

0043-1354

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