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Regrowth of Fecal Coliforms in Class A Biosolids
Eight types of Class A biosolids were tested for fecal coliform (FC) reactivation and/or regrowth at 20, 35, and 50°C for 21 days. Growth of FC did not occur at 20 or 50°C, but it was observed in two samples incubated at 35°C after a lag period of 48 hours. In undigested biosolids, final FC concentration exceeded 10 4 MPN/g, whereas in thermophilically digested biosolids, the final FC concentration remained below 10 3 MPN/g, as FC regrowth may have been affected by the presence of the anaerobic bacterial consortium responsible for the digestion process. Fecal‐coliform reactivation and regrowth within treatment plant operations seem unlikely but can occur in land application of biosolids.
Regrowth of Fecal Coliforms in Class A Biosolids
Eight types of Class A biosolids were tested for fecal coliform (FC) reactivation and/or regrowth at 20, 35, and 50°C for 21 days. Growth of FC did not occur at 20 or 50°C, but it was observed in two samples incubated at 35°C after a lag period of 48 hours. In undigested biosolids, final FC concentration exceeded 10 4 MPN/g, whereas in thermophilically digested biosolids, the final FC concentration remained below 10 3 MPN/g, as FC regrowth may have been affected by the presence of the anaerobic bacterial consortium responsible for the digestion process. Fecal‐coliform reactivation and regrowth within treatment plant operations seem unlikely but can occur in land application of biosolids.
Regrowth of Fecal Coliforms in Class A Biosolids
Jolis, Domènec (author)
Water Environment Research ; 78 ; 442-445
2006-04-01
4 pages
Article (Journal)
Electronic Resource
English
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