Continuous measurements of ammonia, nitrous oxide and methane from air scrubbers at pig housing facilities

摘要: Ammonia, largely emitted by agriculture, involves a great risk for eutrophication and acidification leading to biodiversity loss. Air scrubbers are widely applied reduce ammonia emission from pig poultry housing facilities, but it is not always clear whether their performance meets the requirements. Besides, there growing international concern livestock related greenhouse gases methane nitrous oxide hardly any data concerning fate in air available. This contribution presents results measurement campaigns conducted at chemical, biological two-stage scrubber installed facilities Flanders. inlet outlet of were monitored on-line during one week using photoacoustic gas monitor, which allowed investigate diurnal fluctuations removal scrubbers. Additionally, homogeneity scrubbers, normally checked detection tubes, was investigated more detail continuous data. The with extra nitrification tank performed well terms (86 ± 6%), while suffered nitrifying bacteria inhibition. In chemical pH kept constant, lowering efficiency. A lower efficiency found day, when ventilation rate highest. Nitrous produced inside scrubber, resulting an increased concentration than 200%. Methane could be removed different because its low water solubility.