Measuring particles in pig housing

Solène Lagadec (CRAB) et al., 70th Annual Meeting of the European Federation Animal Science (EAAP), 26-30 août 2019, Ghent, Belgique, p. 484, poster

Livestock contributes to the emission of particles in the atmosphere. Literature shows drastic differences between emission factors by animal category related to the measurement methodologies applied. Based on this observation, a project involving research and development organizations has been developed in order to develop a measurement protocol strictly adapted to pig building conditions. The project is organized in 3 steps: (1) identification of specific conditions related to pig building; (2) analysis of metrology equipment able of adapting to these conditions; and (3) development of a protocol adapted to the equipment identified in the previous step. Conclusions of the first step (1) are the following ones: ammonia concentration inside piggery vary between 0 and 50 ppm, relative humidity between 70 and 100% and temperature between -10 and +40 °C. TSP, PM10 and PM2.5 should be measured continuously in the ambience, in the extracted duct and outside. Massic concentrations but also concentration in number of particles per volume unit should be measured. In order to analyse morphology of particles, sampling should be possible.
Analysis of measurement equipment – step (2) – led to choose the optical measurement methodology applied in the GRIMM 1.109 (Intertek). Nevertheless, in order to validate collected data, gravimetric method with simple filter will also be applied. For particle measurements, 24 h sampling period should be achieved in the middle of the corridor (1-1.50 m high). This duration has been chosen in order to integrate diurnal and nocturnal changes inside piggeries.
To calculate the emission factor per fattening pig, three periods (between 14-18 days, 45-50 days and 78-82 days) were identified for measuring particles. The project is currently in progress with the second phase consisting of the implementation of this protocol in commercial pig farms in Western France.