Access

You are not currently logged in.

Access your personal account or get JSTOR access through your library or other institution:

login

Log in to your personal account or through your institution.

If You Use a Screen Reader

This content is available through Read Online (Free) program, which relies on page scans. Since scans are not currently available to screen readers, please contact JSTOR User Support for access. We'll provide a PDF copy for your screen reader.

Bacteriophages and Fecal Bacteria as Indicators of Chlorination Efficiency of Biologically Treated Wastewater

A. H. Havelaar and Th. J. Nieuwstad
Journal (Water Pollution Control Federation)
Vol. 57, No. 11 (Nov., 1985), pp. 1084-1088
Stable URL: http://www.jstor.org/stable/25042794
Page Count: 5
  • Read Online (Free)
  • Subscribe ($19.50)
  • Cite this Item
Since scans are not currently available to screen readers, please contact JSTOR User Support for access. We'll provide a PDF copy for your screen reader.
Bacteriophages and Fecal Bacteria as Indicators of Chlorination Efficiency of Biologically Treated Wastewater
Preview not available

Abstract

The resistance of conventional bacterial indicators of fecal pollution (thermotolerant coliforms, fecal streptococci, and Clostridium spores) to chlorination of biologically treated wastewater was compared with that of two groups of bacteriophages: somatic coliphages and F specific bacteriophages. The effluent had been nitrified to varying degrees (classified as none, moderate, or good) prior to chlorination. Reduction of thermotolerant coliforms and streptococci increased in moderately nitrified water. Inactivation of thermotolerant coliforms was reduced in well nitrified water, probably because of chlorine consumption by the breakpoint reaction with the last traces of ammonia. Bacteriophage inactivation increased with all degrees of nitrification. The organisms are listed in order of increasing resistance: thermotolerant coliforms < fecal streptococci < somatic coliphages < F specific bacteriophages < spores of sulphite-reducing Clostridia. Reduction of thermotolerant coliforms was significantly correlated with total chlorine residual. Reductions of both groups of bacteriophages and of fecal streptococci were correlated with chlorine dose.

Page Thumbnails

  • Thumbnail: Page 
1084
    1084
  • Thumbnail: Page 
1085
    1085
  • Thumbnail: Page 
1086
    1086
  • Thumbnail: Page 
1087
    1087
  • Thumbnail: Page 
1088
    1088