Project #4874

Evaluating Fate Mechanisms for Contaminants of Concern in BNR Treatment Systems

Principal Investigator
Research Manager
Ms. Lola Olabode
Southern Nevada Water Authority
Constituents of Emerging Concern (CECs)
Endocrine Disrupting Compounds, Pharmaceuticals & Personal Care Products (EDCs & PPCPs)
Biological Nutrient Removal (BNR)


This study provides additional insight into the fate behavior of the target trace organic compounds (TOrC) in BNR treatment systems. The study determined first-order biotransformation rates for seven trace organic compounds (atenolol, benzotriazole, carbamazepine, DEET, sulfamethoxazole, trimethoprim and triclosan) in two BNR treatment systems and identified biotransformation intermediates for three of the trace organic compounds (benzotriazole, triclosan and trimethoprim) under aerobic and anoxic conditions. The sorption distribution coefficients (Kd) for the target trace organic compounds were also determined. This is the first study to identify biotransformation intermediates for benzotriazole, trimethoprim, and triclosan under anoxic conditions. Published by WRF. 112 pages. Online PDF. (2018)

Originally funded as WERF project U2R13.