Abstract
During the passage of sewage through a typical treatment plant employing biological filter beds and operating under dry weather flow conditions, about 7% of the input of anaerobic organisms survive to be released in the effluent. The greatest fall in numbers occurs in the first of two primary settling tanks operating in series and during passage through the filter beds. The predominant organisms were Bacteroides species, gram-positive cocci and clostridial species. There is no significant difference in the rate of survival of any of the genera through the different stages of treatment.
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Thirkell, D., Thakker, B., Clark, L.S. et al. The survival of anaerobes during sewage treatment employing biological filter beds. Antonie van Leeuwenhoek 51, 71–78 (1985). https://doi.org/10.1007/BF00444230
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DOI: https://doi.org/10.1007/BF00444230