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Microbial Bioremediation of Uranium

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Related Experiment Video

Updated: May 10, 2026

Use of a Battery of Chemical and Ecotoxicological Methods for the Assessment of the Efficacy of Wastewater Treatment Processes to Remove Estrogenic Potency
09:49

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Published on: September 11, 2016

Decrease of antiandrogenic activity in gray water and domestic wastewater treated by the MBR process.

Dehua Ma1, Lujun Chen, Rui Lui

  • 1School of Environment, Tsinghua University, Beijing, China. chenlj@tsinghua.edu.cn

Environmental Science. Processes & Impacts
|June 6, 2013
PubMed
Summary
This summary is machine-generated.

Wastewater treatment plants effectively remove antiandrogens, with biodegradation being the primary mechanism. While influent levels varied, both gray water and domestic wastewater systems showed significant removal rates, protecting effluent quality.

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Area of Science:

  • Environmental Science
  • Environmental Chemistry
  • Environmental Engineering

Background:

  • Androgens and antiandrogens are emerging contaminants in wastewater.
  • Membrane bioreactors (MBRs) are increasingly used for wastewater treatment.
  • Understanding the fate of these compounds in MBRs is crucial for environmental protection.

Purpose of the Study:

  • To investigate the variation and activity of androgens and antiandrogens in MBRs treating gray water and domestic wastewater.
  • To quantify the contribution of suspended solids to antiandrogenic activity.
  • To determine the removal efficiency and mechanisms of antiandrogens in MBR systems.

Main Methods:

  • Solid phase extraction (SPE) for sample preparation.
  • Recombined androgen receptor (AR) yeast assay for activity detection.
  • Mass balance analysis to track antiandrogen loads.
  • Comparison of MBR performance for gray water and domestic wastewater.

Main Results:

  • No androgenic activity was detected; all samples showed antiandrogenic activity.
  • Suspended solids accounted for significant antiandrogenic activity (27.4% in gray water, 37.7% in domestic wastewater).
  • MBRs achieved >95% removal of influent antiandrogens, with comparable effluent concentrations.
  • Biodegradation was the primary removal mechanism, responsible for 98% in gray water and 91% in domestic wastewater MBRs.

Conclusions:

  • MBRs are highly effective in removing antiandrogens from both gray water and domestic wastewater.
  • Biodegradation is the dominant process for antiandrogen removal in these MBR systems.
  • The study highlights the importance of MBRs in mitigating the environmental impact of antiandrogenic compounds.