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An experimental determination of the H2S overall mass transfer coefficient from quiescent surfaces at wastewater treatment plants

Horan, NJ, Santos, JM, Kreim, V, Guillot, JM, Reis Junior, CN and Sá, LM (2012) An experimental determination of the H2S overall mass transfer coefficient from quiescent surfaces at wastewater treatment plants. Atmospheric Environment, 60. 18 - 24 . ISSN 1352-2310

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Abstract

This study has investigated overall mass transfer coefficients of hydrogen sulphide from quiescent liquid surfaces under simulated laboratory conditions. Wind flow (friction velocity) has been correlated with the overall mass transfer coefficient (KL) of hydrogen sulphide in the liquid phase using a wind tunnel study. The experimental values for this coefficient have been compared with predicted KL values obtained from three different emission models that are widely used to determine volatilization rates from the quiescent surfaces of wastewater treatment unit processes. Friction velocity (in a range of 0.11 and 0.27 m s 1) was found to have a negligible influence on the overall mass transfer coefficients for hydrogen sulphide but by contrast two of the models predicted a stronger influence of friction velocity and overestimate the KL values by up to a factor of 12.5, thus risking unnecessary expenditure on odour control measures. However, at low wind speeds or friction velocities, when more odour complaints might be expected due to poor atmospheric dispersion, a better agreement of emission rates with experimental data was found for all the models.

Item Type: Article
Institution: The University of Leeds
Academic Units: The University of Leeds > Faculty of Engineering (Leeds) > School of Civil Engineering (Leeds)
Depositing User: Symplectic Publications
Date Deposited: 10 Aug 2012 10:13
Last Modified: 15 Sep 2014 01:28
Published Version: http://dx.doi.org/10.1016/j.atmosenv.2012.06.014
Status: Published
Publisher: Elsevier
Identification Number: 10.1016/j.atmosenv.2012.06.014
URI: http://eprints.whiterose.ac.uk/id/eprint/74428

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