Bench scale experimentation was completed to assess the potential of using a short residence time pretreatment reactor upstream of aerobic digestion to enhance the destruction of pathogens. The impact of aeration, temperature, hydraulic residence time (HRT), solids concentration, and feeding frequency on the pretreatment process was investigated. Subsequent testing evaluated pathogen destruction resulting from the operation of selected pretreatment conditions in a staged configuration with conventional aerobic digesters. Either highly oxidative or highly reductive conditions were observed to be most effective in reducing the concentrations of E. coli. and Salmonella spp. in the pretreatment reactor. When operated in series with the aerobic digesters, the more highly reducing conditions in pretreatment were found to enhance die-off of the microorganisms in subsequent aerobic digestion compared to the control.
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November 2013
Research Article|
November 01 2013
Sludge pretreatment before aerobic digestion to enhance pathogen destruction Available to Purchase
L. Seaman;
L. Seaman
Dept of Civil Engineering, University of Ottawa, Ottawa, ON
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R. Sherif;
R. Sherif
Dept of Civil Engineering, University of Ottawa, Ottawa, ON
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Wayne J. Parker;
Wayne J. Parker
Dept of Civil and Environmental Engineering, University of Waterloo, Waterloo, ON
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K. Kennedy;
K. Kennedy
Dept of Civil Engineering, University of Ottawa, Ottawa, ON
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P. Seto
P. Seto
Urban Water Management, Science & Technology Branch, National Water Research Institute, Environment Canada, Burlington, ON
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Publisher: Emerald Publishing
Received:
June 01 2008
Accepted:
February 01 2009
Online ISSN: 1496-256X
Print ISSN: 1496-2551
This paper is being republished with the permission of NRC Research Press. It was originally submitted to the Journal of Environmental Engineering and Science and subsequently published in the Canadian Journal of Civil Engineering. The correct citation follows: Seaman L, Sherif R, Parker WJ, Kennedy K, Seto P. 2009. Sludge pretreatment before aerobic digestion to enhance pathogen destruction. Canadian Journal of Civil Engineering 36(5): 871–880 DOI: 10.1139/L09-029
ICE Publishing: All rights reserved
2013
Journal of Environmental Engineering and Science (2013) 8 (2): 213–222.
Article history
Received:
June 01 2008
Accepted:
February 01 2009
Citation
Seaman L, Sherif R, Parker WJ, Kennedy K, Seto P (2013), "Sludge pretreatment before aerobic digestion to enhance pathogen destruction". Journal of Environmental Engineering and Science, Vol. 8 No. 2 pp. 213–222, doi: https://doi.org/10.1680/jees.2013.0023
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