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Dissertation/Thesis Abstract

Fate of bacterial and viral indicators in an advanced wastewater treatment plant
by Liang, Chung-Che, M.S., University of Maryland, College Park, 2013, 103; 1541124
Abstract (Summary)

Wastewater treatment plants (WWTP) are natural aggregators of pathogenic organisms due to the waste they treat. This study examined the fate of two bacterial indicators, fecal coliforms (FC) and Salmonella, and one viral indicator, Male-specific coliphages (MSCs), throughout an advanced WWTP. Samples were collected from various points in the WWTP from August 2011 to October 2012. Results show both bacteria and viruses preferentially partition into solids and significant reductions in both bacteria and viruses occur prior to final disposal. The total log removals of FC, Salmonella , and MSCs were 4.51, 5.17, and 6.19, respectively for the solids; and the total log removal of FC, Salmonella, and MSCs in liquids was 4.47, 5.16, and 3.62, respectively. This study provides the first holistic survey of bacteria and virus indicator fate in a WWTP. Furthermore, results herein demonstrate that current biosolids liming regulations may underestimate the level of viruses in Class B biosolids.

Indexing (document details)
Advisor: Wigginton, Krista R.
Commitee: Mi, Baoxia, Torrents, Alba
School: University of Maryland, College Park
Department: Civil and Environmental Engineering
School Location: United States -- Maryland
Source: MAI 52/01M(E), Masters Abstracts International
Subjects: Microbiology, Environmental engineering
Keywords: Biosolids, Homogeneity, Indicators, Liming, Male-specific coliphage, Salmonella, Wastewater treatment
Publication Number: 1541124
ISBN: 978-1-303-23310-4
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