4B3_0152_ MICROBIAL GROWTH IN THE NONWOVEN MATERIALS OF DUST-LOADED FILTERING FACEPIECE RESPIRATORS

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K. Majchrzycka

Malgorzata Okrasa

P. Kozikowski

A. Jachowicz

J. Szulc

B. Gutarowska

Published Aug 14, 2019

Abstract

The paper aims at understanding the effect of dust type and concentration in the filtering nonwovens used in the construction of FFRs on viability of microorganisms. The experiments were performed using melt-blown polypropylene nonwoven typically used in the construction of FFRs as a high efficiency filtering layer and two types of dust collected at the composting and cement plant. Deposition of dust was performed in dust chamber in conditions simulating average and high dust concentration at the workplace. The survival of microorganisms in dust-loaded nonwovens was determined using microbiological quantitative method and the distribution of biofilm formed on the samples was analysed with scanning electron microscopy.


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