TY - JOUR
T1 - Production and characterization of bioaerosols for model validation in spacecraft environment
AU - Salmela, Anniina
AU - Kokkonen, Eero
AU - Kulmala, Ilpo
AU - Veijalainen, Anna-Maria
AU - Van Houdt, Rob
AU - Leys, Natalie
AU - Berthier, Audrey
AU - Ilyin, Viacheslav
AU - Kharin, Sergey
AU - Morozova, Julia
AU - Tikhomirov, Alexander
AU - Pasanen, Pertti
N1 - Score=10
PY - 2018/7
Y1 - 2018/7
N2 - This study aimed to evaluate the suitability of two bioaerosol generation systems (dry and wet generation) for the aerosolization of microorganisms isolated from the International Space Station, and to calibrate the produced bioaerosols to fulfill the requirements of computational fluid dynamics model (CFD) validation. Concentration, stability, size distribution, agglomeration of generated bioaerosol and deposition of bioaerosols were analyzed. In addition, the dispersion of non-viable particles in the air was studied. Experiments proved that wet generation from microbial suspensions could be used for the production of well-calibrated and stabile bioaerosols for model validation. For the simulation of the natural release of fungal spores, a dry generation method should be used. This study showed that the used CFD model simulated the spread of non-viable particles fairly well. The mathematical deposition model by Lai and Nazaroff could be usedto estimate the deposition velocities of bioaerosols on surfaces, although it somewhat underestimated the measured deposition velocities.
AB - This study aimed to evaluate the suitability of two bioaerosol generation systems (dry and wet generation) for the aerosolization of microorganisms isolated from the International Space Station, and to calibrate the produced bioaerosols to fulfill the requirements of computational fluid dynamics model (CFD) validation. Concentration, stability, size distribution, agglomeration of generated bioaerosol and deposition of bioaerosols were analyzed. In addition, the dispersion of non-viable particles in the air was studied. Experiments proved that wet generation from microbial suspensions could be used for the production of well-calibrated and stabile bioaerosols for model validation. For the simulation of the natural release of fungal spores, a dry generation method should be used. This study showed that the used CFD model simulated the spread of non-viable particles fairly well. The mathematical deposition model by Lai and Nazaroff could be usedto estimate the deposition velocities of bioaerosols on surfaces, although it somewhat underestimated the measured deposition velocities.
KW - contamination
KW - modelling
KW - bioaerosol
KW - CFD
KW - spacecraft
KW - fungi
KW - bacteria
UR - http://ecm.sckcen.be/OTCS/llisapi.dll/open/29786881
U2 - 10.1016/j.jes.2017.10.016
DO - 10.1016/j.jes.2017.10.016
M3 - Article
SN - 1001-0742
VL - 69
SP - 227
EP - 238
JO - Journal of Environmental Sciences
JF - Journal of Environmental Sciences
ER -