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Appl Environ Microbiol. 1974 September; 28(3): 359-361
Copyright © 1974 American Society for Microbiology. All Rights Reserved.

Sewage Treatment by Controlled Eutrophication: Bacterial Study

J. Glenn Songer, Rodney F. Smith and N. M. Trieff

Department of Preventive Medicine and Community Health, University of Texas Medical Branch, Galveston, Texas 77550, and Microbiology Laboratory, Alta Bates Hospital, Berkeley, California 94705

ABSTRACT

Several groups of bacteria were isolated and identified in an evaluation of the microbiological properties of a sewage treatment system involving the process of controlled eutrophication in a marine setting (J. G. Songer, N. M. Trieff, R. F. Smith, and D. Grajcer, 1974). Fecal coliforms, enterococci, Salmonellae, Shigellae, Vibrio parahaemolyticus, and Vibrio alginolyticus were studied at three stages of the treatment process. Significant reductions in fecal coliforms (P < 0.01) and enterococci (P < 0.01) were noted from raw sewage to effluent. Salmonellae and Shigellae were not detected at any stage, nor was V. parahaemolyticus. V. alginolyticus was isolated from the effluent only, reflecting the halophilic nature of the organism; low concentrations in raw sewage increased in the more saline effluent. Brine shrimp (Artemia salina), the herbivores in this system, were tested and found to have extremely low numbers of the organisms under study associated with them. Findings point further toward the use of this system as a combined mariculture-sewage treatment facility.

Appl Environ Microbiol. 1974 September; 28(3): 359-361
Copyright © 1974 American Society for Microbiology. All Rights Reserved.





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