A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Pathogen and Indicator Organism Reduction Through Secondary Effluent Filtration: Implications for Reclaimed Water Production
The reduction of pathogens and indicator organisms through secondary effluent filtration was investigated at six full‐scale treatment facilities, ranging in capacity from 0.04 to 1 m 3/s (1 to 25 mgd). Grab samples were assayed for pathogens (cultivable enteric viruses, Giardia, and Cryptosporidium) and indicator organisms (coliforms, enterococci, Clostridium perfringens, and coliphages) quarterly under peak flow conditions from each facility over the course of 1 calendar year. Log 10 removals resulting from filtration averaged 0.3 to 0.8 log 10 for cultivable enteric viruses, 0.4 to 1.5 log 10 for protozoan parasites, 0.01 to 3.7 log 10 for indicator bacteria, and 0.3 to 1.1 log 10 for coliphages. In addition to filter design (cloth, monomedium shallow‐ or deep‐bed, or dual‐media filters), differences in reduction of pathogens and indicators could be attributed to the combined effects of hydraulic loading rates, chemical addition practices, backwashing and postbackwashing operating strategies, and the effectiveness of upstream biological treatment and sedimentation.
Pathogen and Indicator Organism Reduction Through Secondary Effluent Filtration: Implications for Reclaimed Water Production
The reduction of pathogens and indicator organisms through secondary effluent filtration was investigated at six full‐scale treatment facilities, ranging in capacity from 0.04 to 1 m 3/s (1 to 25 mgd). Grab samples were assayed for pathogens (cultivable enteric viruses, Giardia, and Cryptosporidium) and indicator organisms (coliforms, enterococci, Clostridium perfringens, and coliphages) quarterly under peak flow conditions from each facility over the course of 1 calendar year. Log 10 removals resulting from filtration averaged 0.3 to 0.8 log 10 for cultivable enteric viruses, 0.4 to 1.5 log 10 for protozoan parasites, 0.01 to 3.7 log 10 for indicator bacteria, and 0.3 to 1.1 log 10 for coliphages. In addition to filter design (cloth, monomedium shallow‐ or deep‐bed, or dual‐media filters), differences in reduction of pathogens and indicators could be attributed to the combined effects of hydraulic loading rates, chemical addition practices, backwashing and postbackwashing operating strategies, and the effectiveness of upstream biological treatment and sedimentation.
Pathogen and Indicator Organism Reduction Through Secondary Effluent Filtration: Implications for Reclaimed Water Production
Levine, Audrey D. (author) / Harwood, Valerie J. (author) / Farrah, Samuel R. (author) / Scott, Troy M. (author) / Rose, Joan B. (author)
Water Environment Research ; 80 ; 596-608
2008-07-01
13 pages
Article (Journal)
Electronic Resource
English
Pathogen and Indicator Organism Reduction at a Large Activated Sludge Wastewater Treatment Plant
| British Library Conference Proceedings | 1998
Research on Secondary Effluent and Reclaimed Water Reusing for Concrete Mixing
| Trans Tech Publications | 2011
Research on Secondary Effluent and Reclaimed Water Reusing for Concrete Mixing
| British Library Conference Proceedings | 2011
Secondary Effluent Depth Filtration Medium Capacity
| British Library Conference Proceedings | 2006
Disinfection of Secondary Effluent using Slow Sand Filtration
| British Library Conference Proceedings | 2007