The assessment of airborne bacterial contamination in three composting plants revealed site-related biological hazard and seasonal variations

Journal of Applied Microbiology
L FracchiaM G Martinotti

Abstract

The purpose of this study was to evaluate the degree of bacterial contamination generated by three Italian composting plants (1, 2 and 3) in two different seasons and to assess the health risk for the employees. Aerosols samples were collected with an agar impact sampler. Several plant sites and external upwind and downwind controls were examined. Total colony-forming counts of mesophilic and thermophilic bacteria, actinomycetes and streptomycetes, Gram-negatives, coliforms and sulfite-reducers were determined. Selective media were used in order to isolate pathogenic bacteria. The levels of total mesophilic and thermophilic micro-organisms ranged between 33 and >40,000 CFU m(-3) in plant 1, 39 and 18,700 CFU m(-3) in plant 2 and 261 and 6278 CFU m(-3) in plant 3. Strains of Escherichia coli, Staphylococcus aureus and Clostridium perfringens were also found. The plants monitored in this study have proved to be sources of aerosolized bacteria. The activities involving mechanical movement of the composting mass and the indoor activities were of greatest potential risk. In all the studied plants, a statistically significant dependence was found between the bacterial contamination and the season for some or almost all the analysed p...Continue Reading

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Citations

Feb 18, 2014·The Science of the Total Environment·Savvas GenitsarisMaria Moustaka-Gouni
Jul 14, 2010·International Journal of Hygiene and Environmental Health·Renaud PersoonsAnne Maitre
Dec 7, 2007·Journal of Microbiological Methods·Lies M E VanheeTom Coenye
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Jun 4, 2015·Journal of Toxicology and Environmental Health. Part a·Marta Jorge de Vasconcelos PintoJoana Santos Guerreiro
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Jul 1, 2016·Environmental Science and Pollution Research International·Caio Rodrigues-SilvaEugénia Pinto
Jan 28, 2012·Journal of Environmental Monitoring : JEM·Philippe DuquennePascal Poirot
Jan 24, 2012·Journal of the Air & Waste Management Association·Pasi KaarakainenAino Nevalainen
Feb 9, 2017·Journal of Environmental and Public Health·France NcubeKuku Voyi
Apr 27, 2017·Environmental Monitoring and Assessment·Sanaz RashidiEbrahim Darvishi
Apr 14, 2017·Archives of Environmental & Occupational Health·Hera Angela M PagalilauanPierangeli G Vital

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