Sensitivity analysis of the WATER9 model: emissions of odorous compounds from passive liquid surfaces present in wastewater treatment plants

Water Science and Technology : a Journal of the International Association on Water Pollution Research
Milena J CalvoRichard M Stuetz

Abstract

Empirical mathematical models have been frequently used to estimate emissions and to act in the prevention of possible impacts from odorous compounds. Based on the regulatory WATER9 model, the present study had the aim to evaluate the deviations originating from the simplification of using the effective diameter (in contrast to the conceptually appropriate use of the linear physical fetch) as fetch parameter in the calculation of the global mass transfer coefficient at passive liquid surfaces at wastewater treatment plants (WWTPs). The present analysis incorporated the influence of different values of wind velocity, molecular diffusivity and Henry's Law constant. The analyses for the calculation of the mass transfer coefficients were developed for 1,000 wind speeds, chosen using the Monte Carlo method, three WWTPs and three compounds of environmental relevance, spanning different behaviour regarding their volatilisation. The wind speed had a direct influence on the deviations for all types of compounds analysed. However, this parameter was found to be more representative for the compounds whose volatilisation is limited by conditions in the liquid phase. Furthermore, the deviations for the calculation of the mass transfer coeff...Continue Reading

References

Sep 11, 2007·Journal of Environmental Management·Wen-Hsi ChengMing-Shean Chou
Apr 1, 1983·Environmental Science & Technology·D Mackay, A T Yeun
Jul 31, 2012·Journal of Environmental Monitoring : JEM·Wen-Ben YangQing-Liang Zhao
Nov 20, 2016·Water Science and Technology : a Journal of the International Association on Water Pollution Research·Ademir A PrataRichard M Stuetz

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Citations

Jul 25, 2020·Water Environment Research : a Research Publication of the Water Environment Federation·Ulrich BazemoHaydée De Clippeleir
Jun 9, 2021·Journal of the Air & Waste Management Association·Lan TianJinying Xi

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