Understanding factors that affect ammonia and nitrous emissions from anaerobic swine waste treatment lagoons or any animal waste receptacles is a necessary first step in deploying potential remediation options.  In this study, we examined the various meteorological factors (i.e., air temperatures, solar radiation, and heat fluxes) that potentially affect ammonia and nitrous oxide emissions from swine waste lagoon.  Ammonia and nitrous oxide concentrations were monitored using a photoacoustic gas analyzer.  The ammonia and nitrous oxide emissions from the lagoon were monitored continuously for a twenty-four hour cycle, twice a week during a winter month at a height of fifty centimeters above the lagoon surface.  Meteorological data were also monitored simultaneously.  Heat fluxes were tabulated and correlated to the averaged ammonia and nitrous oxide concentrations.  Multi-layer perceptron (MLP) neural network predictive model was built based on the most important meteorological parameters.  The results from MLP neural networks analysis show that ammonia and nitrous oxide emissions from the swine waste lagoon were affected by heat fluxes such as net solar radiation, sensible heat, and latent heat of vaporization. Thus it is important to consider environmental conditions (i.e., meteorological parameters such as solar radiation, latent heat and etc.) in formulating management or abatement strategies for reducing ammonia and nitrous oxide emissions from swine waste lagoons or any other air pollutant emissions from livestock waste receptacles.

Modeling the effect of heat fluxes on ammonia and nitrous oxide emissions from an anaerobic swine waste treatment lagoon using artificial neural network

248th National Meeting (2014)

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