Thermal Inactivation of Viable Geobacillus Stearothermophilus and Bacillus Atrophaeus Spores in a Bench-Scale Landfill Gas Flare Public Deposited

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Last Modified
  • March 22, 2019
Creator
  • Tufts, Jenia A.
    • Affiliation: Gillings School of Global Public Health, Department of Environmental Sciences and Engineering
Abstract
  • 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 inactivat
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  • In Copyright
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  • Includes 13 supplemental Excel files.
Advisor
  • Leith, David
Degree
  • Master of Science
Graduation year
  • 2011
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