Dissertation/Thesis Abstract

Predominance of Bacillus anthracis in the biological population of an activated sludge reactor
by Hoyt, Robert Frederick, M.S., Mississippi State University, 2011, 82; 1491062
Abstract (Summary)

The effects of heavy metals, endocrine disruptors, and other contaminants on activated sludge and wastewater treatment operations have been studied extensively. However, the potential for infiltration of bacterial species not native to activated sludge has not been extensively examined. This project investigated the effect of the contamination of activated sludge wastewater treatment systems by Bacillus anthracis. From a pure culture of Bacillus megaterium inoculations of two bench-scale, sequencing batch reactors with different solids retention times was studied. Microbial enumeration testing was initially done on the mixed liquor alone, but to further detail the Bacillus path through the reactor, further testing was done to examine the supernatant. The data indicated that little effect would be caused from Bacillus inoculation of activated sludge reactors as population diversity returned to normal within a period of time equal to approximately one quarter of the solids retention time.

Indexing (document details)
Advisor: Truax, Dennis D.
Commitee: Diaz-Ramirez, Jairo N., Magbanua, Benjamin S.
School: Mississippi State University
Department: Civil and Environmental Engineering
School Location: United States -- Mississippi
Source: MAI 49/05M, Masters Abstracts International
Subjects: Microbiology, Civil engineering, Environmental engineering
Keywords: Activated sludge, Bacillus anthracis, Biological contamination, Most probable number
Publication Number: 1491062
ISBN: 978-1-124-58850-6
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