REGROWTH OF FECAL COLIFORMS IN CLASS A BIOSOLIDS

Domènec Jolis; Matina Marneri; GuoJi Huang; Bonnie M. Jones

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REGROWTH OF FECAL COLIFORMS IN CLASS A BIOSOLIDS

Abstract

Eight types of Class A biosolids were tested for the potential of fecal coliform regrowth at 20, 35 and 50 °C for 21 days. Regrowth of fecal coliforms (FC) did not occurr at 20 or 55 °C, but it was observed in two samples incubated at 35 °C after a lag period of 48 hours. In a sample of undigested biosolids, final FC concentration exceeded 104 CFU/g whereas in the thermophilic biosolids, final FC concentration remained below 103 CFU/g as FC regrowth was affected by the presence of the anaerobic bacterial consortium. FC regrowth within treatment plant operations seems unlikely but may occur in land application of biosolids.

Eight types of Class A biosolids were tested for the potential of fecal coliform regrowth at 20, 35 and 50 °C for 21 days. Regrowth of fecal coliforms (FC) did not occurr at 20 or 55 °C, but it was observed in two samples incubated at 35 °C after a lag period of 48 hours. In a sample of undigested biosolids, final FC concentration exceeded 104 CFU/g whereas in the thermophilic...

Author(s)

Domènec JolisMatina MarneriGuoJi HuangBonnie M. Jones

SourceProceedings of the Water Environment Federation

SubjectSession 2: Research and Development A

Document typeConference Paper

PublisherWater Environment Federation

Print publication date Jan, 2004

ISSN1938-6478

SICI1938-6478(20040101)2004:1L.138;1-

DOI10.2175/193864704784342884

Volume / Issue2004 / 1

Content sourceResiduals and Biosolids Conference