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Field observations on the occurrence of new indicators of disinfection efficiency |
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| Authors: | C. N. Haas B. F. Severin D. Roy R. S. Engelbrecht A. Lalchandani S. Farooq |
| Affiliation: | 1. Pritzker Department of Environmental Engineering, Illinois Institute of Technology, Chicago, IL 60616, U.S.A.;2. Tennessee Eastman Co. Kingsport, TN, U.S.A.;3. Department of Civil Engineering, Louisiana State University, Baton Rouge, LA 70803, U.S.A.;4. Department of Civil Engineering, University of Illinois at Urbana-Champaign, Urbana, IL 61801, U.S.A.;5. Dailey & Associates, Dhahran, Saudi Arabia |
| Abstract: | This paper summarizes studies on the presence of acid-fast and yeast organisms in wastewater and water treatment plants and in surface water. These organisms were found to satisfy three of Bonde's criteria for indicator organisms: presence whenever pathogens are likely to be present; resistance at least equal to that of pathogens; and lack of regrowth in the post-treatment environment. This, plus prior data, indicates that these organisms are at least as acceptable as indicators of disinfection efficiency than the coliform group. |
| Keywords: | microbiology indicator organisms water treatment wastewater treatment acid-fast bacteria yeasts coliforms disinfection field studies |
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