Exposure to airborne fungi during sorting of recyclable plastics in waste treatment facilities

摘要

Background: In working environment of waste treatment facilities, employees are exposed to high concentrations of airbornemicroorganisms. Fungi constitute an essential part of them. This study aims at evaluating the diurnal variation in concentrationsand species composition of the fungal contamination in 2 plastic waste sorting facilities in different seasons. Material and Methods: Air samples from the 2 sorting facilities were collected through the membrane filters method on 4 different types ofcultivation media. Isolated fungi were classified to genera or species by using a light microscopy. Results: Overall, the highestconcentrations of airborne fungi were recorded in summer (9.1×103–9.0×105 colony-forming units (CFU)/m3), while the lowestones in winter (2.7×103–2.9×105 CFU/m3). The concentration increased from the beginning of the work shift and reached a plateauafter 6–7 h of the sorting. The most frequently isolated airborne fungi were those of the genera Penicillium and Aspergillus. Theturnover of fungal species between seasons was relatively high as well as changes in the number of detected species, but potentiallytoxigenic and allergenic fungi were detected in both facilities during all seasons. Conclusions: Generally, high concentrations ofairborne fungi were detected in the working environment of plastic waste sorting facilities, which raises the question of healthrisk taken by the employees. Based on our results, the use of protective equipment by employees is recommended and preventivemeasures should be introduced into the working environment of waste sorting facilities to reduce health risk for employees.Med Pr 2017;68(1):1–9