Results 211 to 220 of about 6,920 (228)
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Regrowth of Fecal Coliforms in Class A Biosolids
Water Environment Research, 2006Eight 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
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Extended Acid Digestion for Inactivation of Fecal Coliforms
Water Environment Research, 2006The objective of this research was to establish a correlation between inactivation of fecal coliforms caused by organic acids in their un‐ionized form in batch acid digesters and semicontinuously fed acid digesters at both mesophilic (38°C) and low‐mesophilic (24°C) temperatures. Batch acid digesters achieved a U.S.
Bartek Puchajda, Jan A. Oleszkiewicz
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REGROWTH OF FECAL COLIFORMS IN CLASS A BIOSOLIDS
Proceedings of the Water Environment Federation, 2004Eight 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.
Domènec Jolis +3 more
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Fecal coliform densities in a Western watershed
Water, Air, and Soil Pollution, 1982This paper describes the areal distribution of fecal coliform densities within the stream system of the South Platte River basin in Colorado. Low densities, e.g., 0 to 99 fecal coliforms per 100 ml, were found in mountain streams, while higher densities, e.g., 10000 to 100000 and above were found in plains streams. About 49 % of the plains stations and
Patti J. Psaris, David W. Hendricks
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Escherichia coli: The Fecal Coliform
1977The use of Escherichia coli as an indicator of fecal pollution and the significance of its presence in surface waters was reviewed. A minidefinition which identifies this organism at least 95 percent of the time was proposed. Membrane filtration and most probable number methods for the enumeration of E. coli were discussed.
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Significance of fecal coliform and fecal streptococcus in water pollution monitoring
Acta Academiae Medicinae Wuhan, 1982The experimental results showed that the fecal coliform (FC) to fecal streptococcus (FS) ratio (FC/FS) in the human feces and in warm-blooded animal feces were rather different. FC/FS ratio in the human feces was greater than 7.0, and in warm-blooded animal feces was less than 1.0.
Cai Hongdao, Lin Hai
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Coliform Group and Fecal Coliform Organisms as Indicators of Pollution in Drinking Water
Journal AWWA, 1960The presence of any type of coliform organism in treated drinking water suggests either inadequate treatment or access of undesirable materials to the water after treatment. Although there are some differences between strain and subgroup organisms with regard to survival under natural conditions and resistance to chlorination, in general all the ...
Harold F. Clark, Paul W. Kabler
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Surface streaking and fecal coliform levels
Canadian Journal of Civil Engineering, 1984The measurement of the dilution and die-off of fecal coliforms in high velocity, wind-generated surface currents is discussed. The dispersion in the streaks is similar to that found in oil slicks. It was found that the high velocities and slower growth rate of the dispersion in the streaks resulted in fecal coliform levels about four times higher than
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Patterns of Fecal Coliform Contamination in Day‐Care Centers
Public Health Nursing, 1990AbstractDuring a six‐month period, on four separate occasions, six licensed day‐care centers had cultures taken from environmental surfaces as well as the hands of children and teachers. Fecal coliforms were recovered from 64 (9.5%) of the 675 surfaces sampled.
Robert H. Pantell +3 more
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FECAL COLIFORM TRANSPORT AS AFFECTED BY SURFACE CONDITION
Transactions of the ASAE, 2005Land application of manure is recommended to recycle organic matter and nutrients, thus enhancing the soil quality and crop productivity. However, pathogens in manure may pose a human health risk if they reach potable or recreational water resources. The objective of this study was to observe and quantify the effects of vegetated filter strips (VFS)
R. Roodsari +5 more
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