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| Removal of Estrone, 17β-Estradiol and Bisphenol A in a Pilot-Scale A2O/MBR System |
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| KeyWord:estrogen; bisphenol A; A2O/MBR; influent loading; removal efficiency |
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| Abstract: |
| Estrone（E1）, 17β-estradiol（E2） and bisphenol A（BPA） are important endocrine disrupters（EDCs） because of their endocrine disrupting effects to aquatic organisms. Efficient removal of the three EDCs from wastewater in wastewater treatment systems has received lots of attention in recent years. This study examined the removal of the three EDCs in a pilot-scale A2O/MBR system. The water samples were enriched by HLB column and analyzed by LC-MS/MS. The results revealed that the removal efficiency of E1, E2 and BPA reached 96.13%~100%, 100% and 93.1%~100%, respectively. The three EDCs were effectively removed in the A2O/MBR system at both high and low influent loading rates. Meanwhile, the removal efficiency of COD, NH+4, and TP were all over 91%. It was found that the concentrations of the three compounds were gradually decreased along the treatment process, especially in anaerobic tanks. MBR had a significant contribution to the removals of the three EDCs and its contribution became more significant at higher influent loading rates. The results showed that the A2O/MBR system could not only tolerate the varied influent loading rates, but also could enhance the removal of EDCs. Therefore, this process would have a broad application prospect in the advanced treatment of estrogens in wastewater treatment system. |
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