Removal of 17α-ethinylestradiol and total phosphorus in a sequencing batch reactor under two different sludge retention-time conditions

Sewage treatment systems can prevent the direct discharge of endocrine disruptors, such as 17α-ethinylestradiol (EE2), into environment. Treatment capable promoting total phosphorus (TP) removal, sequencing batch reactors (SBRs), are promising in this regard. Two lab-scale SBRs with different sludge retention times (SRTs) were assessed for their EE2 and TP removal rates. Anaerobic/aerobic/anoxic phases cycles 6 h used to treat sewage containing at a concentration 5 μg L-1. The rates chemical oxygen demand approximately 80% both SBRs. Partial nitrification was observed Initially, concentrations above 1.0 L-1 treated measured. These smaller SBR 1, which lower SRTs; removed by sorption. After 56th cycle, below 0.1 SBRs, indicating that its may have occurred biodegradation due acclimation process. Therefore, seem play an important role SBRs.
 Keywords: A2O SBR, treatments.