Development of passive flux samplers as a technology for the estimation of N2O emission from livestock buildings: commercial scale evaluation
Authors: LARIOS- MARTINEZ, ARACELI DALILA; Godbout, St
Description: In order to contribute to the development of technologies for the estimation of nitrous oxide (N2O) emissions from livestock sources, passive flux samplers (PFS) were developed and evaluated at commercial scale. The measurements were carried out in a room of two commercial farms. PFS packed with zeolite 5A were first calibrated in the laboratory. After that, two PFS were placed in the ventilation shafts facing the air flow direction. The zeolite 5A used as collector medium in each PFS was changed at different sampling times (from 8 to 60 min). Three samplings by day were made (including all the samplings times) at each farm during three days. In the end of the sampling period, the used zeolite 5A was transported to the laboratory to desorb and quantify by gas chromatography the mass of N2O collected. Then, the mass flow of N2O issued (g/h) was estimated. At the same time, N2O concentrations was directly measured by gas chromatography by pumping the air from the rooms to a mobile laboratory. Air flow rate, humidity and temperature, were also measured during the entire experiment to estimate the mass flow by direct detection. Results showed that the performance of the PFS was appropriated with an accuracy higher than 80% versus direct detection under evaluated conditions. Furthermore, taking into account the complete experiment, a PFS methodology to estimate N2O emission by day is suggested. It is concluded that the PFS can be considered as an innovative tecnology to estimate N2O emissions from livestock buildings.
Keywords: GHG, N2O emissions, Passive flux samplers, Zeolite 5A, Adsorption
Conference name: CSBE/SCGAB 2017 Annual Conference, Canad Inns Polo Park, Winnipeg, Manitoba, 6-10 August 2017.
Session name: Session 6A: Animal Housing
Publisher: Canadian Society for Bioengineering
Language 1: en
Rights: Canadian Society for Bioengineering