AWWA WQTC65972

This study investigated the effects of current and emerging reuse water treatmenttechnologies, including advanced oxidation processes (AOPs), on the removal ofindigenous estrogenic activity and spiked endocrine disrupting compounds (EDCs) intoreclaimed waters by use of the receptor-binding yeast estrogen screen (YES). AOPs havebeen considered an effective technique for the removal of many organic pollutants inwater. This study was conducted in both field scale and bench scale experiments. ThisYES bioassay detects compounds that bind with the human estrogen receptor (hER)integrated into yeasts (Saccharomyces cerevisae). The YES assay allows for greatersensitivity to quantitatively detect a variety of known and unknown estrogens via areceptor mechanism. The YES assay is therefore a broad and sensitive method comparedto conventional chemical analyses, allowing for assessment of the effectiveness of eachtechnology to remove the EDCs to trace (non-bio-active) levels. In field tests, the nativeeffluent estradiol equivalent concentration (EEQ) was 430 ng/L and was reduced by 60%(to 170 ng/L) during microfiltration. Further reduction of estrogenicity by more than 90%(<20 ng/L) was achieved following ozonation and O₃/H₂O₂ treatment. Bench scaleexperiments with spiked EDCs were also performed to compare the results obtained infield scale experiments using an expanded suite of treatments. The results from the benchscale experiments show that total estrogenicity decreased by 90% for LP UV with 5 ppmH₂O₂ after UV exposure of 150 mJ/cm². However, there appeared to be no additionalremoval with increasing UV fluence. From the results in the field and bench scaleexperiments to date, the AOPs are a promising tool for the control of EDCs in reclaimedwater. Includes 5 references, tables, figures.

Product Details

Edition:

Vol. - No.

Published:

11/01/2007

Number of Pages:

7

File Size:

1 file , 180 KB