Dissertation/Thesis Abstract

Thermal inactivation of viable Geobacillus stearothermophilus and Bacillus atrophaeus spores in a bench-scale landfill gas flare
by McBrian Tufts, Jenia A., M.S., The University of North Carolina at Chapel Hill, 2011, 69; 1496874
Abstract (Summary)

A bench-scale, landfill flare system was designed and built to test the potential for heat-resistant spores to survive the flaring process and enter the environment. The residence times and temperatures of the flare were characterized and compared to full-scale systems. Experiments were conducted using Geobacillus stearothermophilus and Bacillus atrophaeus spores as surrogates for Bacillus anthracis. Spore solutions were aerosolized, dried, and sent through the bench-scale system. Sampling was conducted downstream of the flare using a bioaerosol collection device. The samples were cultured, incubated for seven days, and assessed for viability.

Results showed that the bench-scale, landfill flare system was comparable to a full-scale combustor flare with a single-orifice diffusion burner. All spores of G. stearothermophilus and B. atrophaeus were inactivated in the bench-scale system, suggesting that spores that pass through the flare in a full-scale system will become inactivated as well.

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Indexing (document details)
Advisor: Leith, David, Rosati, Jacky A.
Commitee: Leith, David, Rosati, Jacky A., Stewart, Jill R.
School: The University of North Carolina at Chapel Hill
Department: Environmental Sciences & Engineering
School Location: United States -- North Carolina
Source: MAI 50/01M, Masters Abstracts International
Subjects: Microbiology, Environmental Health, Environmental engineering
Keywords: Bacillus anthracis, Bacillus atrophaeus, Geobacillus stearothermophilus, Landfills
Publication Number: 1496874
ISBN: 978-1-124-78277-5
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