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RECORD NUMBER: 34 OF 3689

Main Title Acid-fast bacteria and yeasts as indicators of disinfection efficiency /
Author Engelbrecht, Richard S.; Haas, Charles N.; Shular, Jeffrey A.; Dunn, David L.; Roy, Dipak
CORP Author Illinois Univ. at Urbana-Champaign. Dept. of Civil Engineering.;Municipal Environmental Research Lab., Cincinnati, OH.
Publisher Municipal Environmental Research Laboratory, Office of Research and Development U.S. Environmental Protection Agency,
Place Published Cincinnati, Ohio
Year Published 1979
Report Number EPA-600/2-79-091
Stock Number PB80-124795
OCLC Number 06535316
Subjects Bacteria; Yeasts; Disinfection; Potable water; Indicator species; Efficiency; Microorganism control(Water); Chlorination; Ozonization; Water treatment; Coliform bacteria; Evaluation; Bioindicators; Drinking water; Candida parapsilosis; Mycobacterium fortuitum
Subject Added Ent Yeast.; Ozonization.; Chlorination.; Drinking water.; Chlorination.; Drinking water.; Ozonization.; Yeast.
Internet Access
Description Access URL
http://nepis.epa.gov/Exe/ZyPURL.cgi?Dockey=9100PJAS.txt
Holdings
Library   Call Number Additional Info Location Date Modified
EJAD EPA 600/2-79-091 Region 3 Library/Philadelphia, PA 06/16/2000
EJBD ARCHIVE EPA 600-2-79-091 Headquarters Library/Washington,DC 01/22/2014
EKAM TD747.A34 Region 4 Library/Atlanta,GA 11/06/1998
EKBD EPA-600/2-79-091 Research Triangle Park Library/RTP, NC 09/07/2001
ELBD EPA 600-2-79-091 AWBERC Library/Cincinnati,OH 12/27/2002
EOAD EPA 600/2-79-091 Region 8 Technical Library/Denver,CO 02/15/2011
EOBD EPA 600-2-79-091 NEIC Library/Denver,CO 06/02/2000
ESAD EPA 600-2-79-091 Region 10 Library/Seattle,WA 03/23/2010
NTIS PB80-124795 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. NTIS 01/01/1988
Collation xii, 143 p. : ill. ; 28 cm.
Abstract Since the coliform group of organisms is considered to be less resistant to chlorine than some bacterial and viral pathogens, the utility of both yeast and acid-fast oganisms as potntial indicators of disinfection efficiency was evaluated. In most laboratory studies these two groups of organisms were represented by Candida parapsilosis and Mycobacterium fortuitum, respectively. The relative resistance of the rest organisms to free chlorine was: acid fast greater than yeast greater than coliforms. The increased chlorine resistance of these organisms appeared to be the result of the thickness and impermeability of the cell wall. It was concluded that the primary mode of action of chlorine in disinfection was disruption of the cell membrane with a resultant change in cell permeability and physical damage to the cell DNA. Resistance to ozonation was also studied. Variations in pH between 5 and 10 did not significantly affect organism survival of either yearor acid-fast organisms using constant ozone residuals, while increasing temperatures increased the inactivation of both organisms. Large volume sampling and enumeration techniques were developed for the yeasts and acid-fast organisms using membrane filtration which enabled the enumeration of these organisms at the relatively low densities found in finished drinking water.
Notes EPA-600/2-79-091.
Author Added Ent
Engelbrecht, Richard S.
Corporate Au Added Ent United States. Environmental Protection Agency.
Title Ser Add Ent Research reporting series. Environmental protection technology.
PUB Date Free Form 1979
Series Title Untraced Environmental protection technology series
NTIS Prices PC A08/MF A01
BIB Level m
OCLC Time Stamp 20140116100317
Cataloging Source OCLC/T
Language eng
SUDOCS Number EP 1.23/2:600/2-79-091
Origin OCLC
Type MERGE
OCLC Rec Leader 01508cam 2200385Ii 45020


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