Methane emission estimates using chamber and tracer release experiments for a municipal waste water treatment plant

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Abstract

This study presents two methods for estimating methane emissions from a waste water treatment plant (WWTP) along with results from a measurement campaign at a WWTP in Valence, France. These methods, chamber measurements and tracer release, rely on Fourier transform infrared spectroscopy and cavity ring-down spectroscopy instruments. We show that the tracer release method is suitable for quantifying facility- and some process-scale emissions, while the chamber measurements provide insight into individual process emissions. Uncertainties for the two methods are described and discussed. Applying the methods to CH<inf>4</inf> emissions of the WWTP, we confirm that the open basins are not a major source of CH<inf>4</inf> on the WWTP (about 10 % of the total emissions), but that the pretreatment and sludge treatment are the main emitters. Overall, the waste water treatment plant is representative of an average French WWTP.

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Yver Kwok, C. E., Müller, D., Caldow, C., Lebègue, B., Mønster, J. G., Rella, C. W., … Ciais, P. (2015). Methane emission estimates using chamber and tracer release experiments for a municipal waste water treatment plant. Atmospheric Measurement Techniques, 8(7), 2853–2867. https://doi.org/10.5194/amt-8-2853-2015

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