Abstract
The mutagenic activity of wastewater was followed during conventional activated sludge treatment at a municipal plant. Raw wastewater was initially screened for mutagenic potential, using the AmesSalmonella/mammalian microsomal test and employer tester strains. The combined raw wastewater produced dose-related mutagenic responses in the presence of S9 metabolic activation. Raw wastewater from domestic sources alone was not mutagenic. Mutagenic activity was observed throughout the treatment process. Activated sludge prior to chlorination contained the highest specific mutagenic activity. Chlorination decreased the specific mutagenic activity at pH 11. Mutagenic activity in municipal wastewater containing industrial discharges is not removed by conventional treatment processes and can be enhanced by activated sludge treatment.
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Blevins, R.D., Brennan, L.A. Fate of mutagenic activity during conventional treatment of municipal wastewater sludge. Arch. Environ. Contam. Toxicol. 19, 657–664 (1990). https://doi.org/10.1007/BF01183981
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DOI: https://doi.org/10.1007/BF01183981