Removal of selected natural and synthetic estrogenic compounds in a Canadian full-scale municipal wastewater treatment plant. |
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| Authors: | Nazim Cicek Kathleen Londry Jan A Oleszkiewicz Denny Wong Yoomin Lee |
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| Affiliation: | Department of Biosystems Engineering, University of Manitoba, Winnipeg, Manitoba, Canada R3T 5V6. Nazim_Cicek@umanitoba.ca |
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| Abstract: | The effect of a full-scale municipal wastewater treatment plant (WWTP) and each of the treatment units within the stream on the removal of endocrine-disrupting compounds was evaluated by tracking 17-beta-estradiol (E2), estrone (E1), and 17-alpha-ethinylestradiol (EE2). The overall performance of the WWTP compared well with other plants, as 90.5% removal of E1+E2 and 74.9% removal of EE2 were observed. A larger fraction of EE2 entered the plant in particulate form than E1 and E2, while a lower fraction of EE2 left the plant in particulate form than soluble form. The activated sludge units reduced the concentration of E1+E2 and EE2 in the liquid phase by 88.2% and 44.6%, respectively. The UV treatment process did not reduce the amount of estrogens. The aqueous phase of the tertiary lagoon solids contained higher levels of estrogens compared with the lagoon influent. |
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