Typical fecal coliform density values

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  • RodrigoBIS
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Re: Typical fecal coliform density values

Wow, that's gonna be really useful in my research. bischile.org

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  • willacker
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Re: Reply: Typical fecal coliform density values

Thank you! Much appreciated..

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  • F H Mughal
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Re: Reply: Typical fecal coliform density values

Dear Willacker,

I'm attaching some papers, which should help you in your research work.
SuSanA Secretariat: Please check for copyright issues - Thanks

Regards,

F H Mughal

+++++++

Note by moderator (EvM): I had to remove this paper from the Wat. Sci. Tech. journal:

Wat. Sci. Tech. Vol. 25, No. 12, pp. 93-103, 1992.
Printed in Great Britain. All rights reserved.
ENTERIC BACTERIA SURVIV AL
FACTORS
0273-1223192 $15'00
Copyright © 1992 IAWPRC

M. Pommepuy*, J. F. Guillaud*, E. Dupray*, A. Derrien*,
F. Le Guyader** and M. Cormier***
* IFREMER, Centre de Brest, Direction de I'Environnement Littoral, B.P. 70, 29280
Plouzane, France
** Faculte de Pharmacie, Universite de Nantes, Laboratoire de
Virologie-Bacteriologie, 1 rue Gaston Veil, B.P. 1024, 44035 Nantes Cedex, France
*** UER Rennes I Laboratoire de Microbiologie Pharmaceutique, avenue du
Professeur L Bernard, 35043 Rennes, France

ABSTRACT
In order to improve bacterial water quality of shellfish farming areas, studies were conducted in the English
Channel (Morlaix) and on the Mediterranean coast (Toulon). These two areas were chosen in order to
compare behaviour of fecal bacteria in two different ecosystems. In the estuary of Morlaix sediments are
polluted by way of settlement, but most of the bacteria are mixed with turbid waters and are able to survive
a very long time (T90 are in a range of several hours to several days). By measuring the increase in salt
tolerance of the strains grown in natural organic matter, it was demonstrated that Salmonella can tolerate
coastal water salinities. Moreover, because light penetration is prevented by suspended matter, the solar
bactericidal effect is very low. On the contrary, through lack of nutrients and very high sunlight intensity,
die-off rates in Mediterranean waters are very high (at the surface T90 are less than 2 hours, and several
hours in deep waters). A close relationship was found between the light intensity received by bacteria and
the T90.Predicted T90 must be found using these two parameters(including turbidity and deep effect on light
intensity). The authors suggest that precautions must be taken to carry out impact studies depending on water
quality of the area, especially in turbid areas. The knowledge of these mechanisms is very important to
evaluate waste water impact on the quality of shellfish farming areas, and to improve elimination of fecal
bacteria in sewage treatment plants.
F H Mughal (Mr.)
Karachi, Pakistan

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  • willacker
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Typical fecal coliform density values

Hello,

I am currently searching for widely accepted values for fecal coliform densities of different types of waste.

Open defecation
Fecal sludge/latrine sludge
Septic tank discharge
Raw sewage
Urban run-off

Would anyone be able to indcate some good literature for me to chase this up? so far I have not been successful..

thanks!

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