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Exploring 17α-ethinylestradiol removal, mineralization, and bioincorporation in engineered bioreactors
- Exploring 17α-ethinylestradiol removal, mineralization, and bioincorporation in engineered bioreactors
- Yi T.; Mackintosh S.; Aga D.S.; Harper W.F.
- Ewha Authors
- Issue Date
- Journal Title
- Water Research
- vol. 45, no. 3, pp. 1369 - 1377
- SCI; SCIE; SCOPUS
- This research investigated removal, mineralization, and bioincorporation of 17α-ethinylestradiol (EE 2) in membrane bioreactors and conventional bioreactors. When the influent EE 2 concentration was >50 μg/L, the membrane bioreactor (MBR) biomass removed more EE 2 than conventional bioreactor (CBR) biomass in continuous tests, likely because the sorption partitioning coefficients are higher for MBR biomass. Microautoradiography was carried out to investigate the distribution of EE 2 within the aggregates retrieved from the bioreactors, and the results revealed concentration gradients present within the floc. Experiments using radiolabeled 14C-EE 2 experiments (done with 24.5 μg/L EE 2) showed that EE 2 removal rates and the amount of EE 2 mineralized were similar in MBRs and CBRs. Direct measurements and bioenergetic estimates suggest that EE 2-related carbon is probably incorporated into active biomass, despite the fact that EE 2 was added at a concentration that was much lower than that of the primary growth substrates. © 2010.
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