Influence of seasons and sampling strategy on assessment of bioaerosols in sewage treatment plants in Switzerland

Détails

ID Serval
serval:BIB_01C582CA357D
Type
Article: article d'un périodique ou d'un magazine.
Collection
Publications
Titre
Influence of seasons and sampling strategy on assessment of bioaerosols in sewage treatment plants in Switzerland
Périodique
Annals of Occupational Hygiene
Auteur(s)
Oppliger Anne, Hilfiker Silvia, Vu Duc Trinh
ISSN
0003-4878
Statut éditorial
Publié
Date de publication
2005
Peer-reviewed
Oui
Volume
49
Numéro
5
Pages
393-400
Langue
anglais
Notes
SAPHIRID:49705
Résumé
An assessment of sewage workers' exposure to airborne cultivable bacteria, fungi and inhaled endotoxins was performed at 11 sewage treatment plants. We sampled the enclosed and unenclosed treatment areas in each plant and evaluated the influence of seasons (summer and winter) on bioaerosol levels. We also measured personal exposure to endotoxins of workers during special operation where a higher risk of bioaerosol inhalation was assumed. Results show that only fungi are present in significantly higher concentrations in summer than in winter (2331 +/- 858 versus 329 +/- 95 CFU m(-3)). We also found that there are significantly more bacteria in the enclosed area, near the particle grids for incoming water, than in the unenclosed area near the aeration basins (9455 +/- 2661 versus 2435 +/- 985 CFU m(-3) in summer and 11 081 +/- 2299 versus 2002 +/- 839 CFU m(-3) in winter). All bioaerosols were frequently above the recommended values of occupational exposure. Workers carrying out special tasks such as cleaning tanks were exposed to very high levels of endotoxins (up to 500 EU m(-3)) compared to routine work. The species composition and concentration of airborne Gram-negative bacteria were also studied. A broad spectrum of different species within the Pseudomonadaceae and the Enterobacteriaceae families were predominant in nearly all plants investigated. [Authors]
Pubmed
Web of science
Création de la notice
12/05/2009 12:50
Dernière modification de la notice
03/03/2018 13:16
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