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Removal of New Indicators by Coagulation and Filtration

Haas, Charles N. / Severin, Blaine F. / Roy, Dipak / Engelbrecht, Richard S. / Lalchandani, Ajit

The removal of yeasts and acid‐fast organisms by chemical coagulation and rapid‐rate sand filtration was compared in laboratory studies with that of the currently accepted group of indicator organisms, total coliforms. These studies indicate that coagulation and filtration do not remove yeasts and acid‐fast organisms to a greater extent than coliform organisms, and since yeast and acid‐fast organisms are more resistant to chlorine than coliforms, yeasts and acid‐fast organisms may be more valid indicators of the efficiency of water disinfection than the traditional indicators.

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Removal of New Indicators by Coagulation and Filtration

Haas, Charles N. / Severin, Blaine F. / Roy, Dipak / Engelbrecht, Richard S. / Lalchandani, Ajit

The removal of yeasts and acid‐fast organisms by chemical coagulation and rapid‐rate sand filtration was compared in laboratory studies with that of the currently accepted group of indicator organisms, total coliforms. These studies indicate that coagulation and filtration do not remove yeasts and acid‐fast organisms to a greater extent than coliform organisms, and since yeast and acid‐fast organisms are more resistant to chlorine than coliforms, yeasts and acid‐fast organisms may be more valid indicators of the efficiency of water disinfection than the traditional indicators.

Removal of New Indicators by Coagulation and Filtration

Haas, Charles N. / Severin, Blaine F. / Roy, Dipak / Engelbrecht, Richard S. / Lalchandani, Ajit

The removal of yeasts and acid‐fast organisms by chemical coagulation and rapid‐rate sand filtration was compared in laboratory studies with that of the currently accepted group of indicator organisms, total coliforms. These studies indicate that coagulation and filtration do not remove yeasts and acid‐fast organisms to a greater extent than coliform organisms, and since yeast and acid‐fast organisms are more resistant to chlorine than coliforms, yeasts and acid‐fast organisms may be more valid indicators of the efficiency of water disinfection than the traditional indicators.

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Title:

Removal of New Indicators by Coagulation and Filtration

Contributors:

Haas, Charles N. (author) / Severin, Blaine F. (author) / Roy, Dipak (author) / Engelbrecht, Richard S. (author) / Lalchandani, Ajit (author)

Published in:

Journal ‐ American Water Works Association ; 77 ; 67-71

Publication date:

1985-02-01

Size:

5 pages

ISSN:

1551-8833 , 0003-150X

DOI:

https://doi.org/10.1002/j.1551-8833.1985.tb05494.x

Type of media:

Article (Journal)

Type of material:

Electronic Resource

Language:

English

Keywords:

Coagulation , Filtration , Rapid Sand Filters , Coliforms , Disinfection

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