Sludge pretreatment before aerobic digestion to enhance pathogen destructionA paper submitted to the Journal of Environmental Engineering and Science.-Reference-Cited by-同舟云学术

Sludge pretreatment before aerobic digestion to enhance pathogen destructionA paper submitted to the Journal of Environmental Engineering and Science.

Published:2009-05 Issue:5 Volume:36 Page:871-880
ISSN:0315-1468
Container-title:Canadian Journal of Civil Engineering
language:en
Short-container-title:Can. J. Civ. Eng.

Author:

Seaman L.¹²³,Sherif R.¹²³,Parker Wayne J.¹²³,Kennedy K.¹²³,Seto P.¹²³

Affiliation:

1. Dept. of Civil Engineering, University of Ottawa, Ottawa, ON

2. Dept. of Civil and Environmental Engineering, University of Waterloo, Waterloo, ON

3. Urban Water Management, Science & Technology Branch, National Water Research Institute, Environment Canada, Burlington, ON

Abstract

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.

Publisher

Canadian Science Publishing

Subject

General Environmental Science,Civil and Structural Engineering

Link

http://www.nrcresearchpress.com/doi/pdf/10.1139/L09-029

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