AWWA WQTC65897

The UV/H₂O₂ advanced oxidation process was evaluated for removal of methyl-isoborneol (MIB) and geosmin in three natural waters with a total organic carbon (TOC) concentration range of 1.7 to 3.0 mg/L. The results, after accounting for volatilization, showed MIB removals ranging from 5% to 96% and geosmin removals ranging from 22% to 98%. Increasing the H₂O₂ dose from 2 to 5 mg/L resulted in an additional 20% removal for both compounds. Increasing the UV dose from 200 to 500 mJ/cm² resulted in an additional 29% removal for both compounds, while increasing the UV dose from 500 to 1000 mJ/cm² resulted in an additional 14% removal for both compounds. The initial TOC, alkalinity and turbidity were found not to have an impact on the removal. The experimental results were compared to those predicted by a UV model (Rosenfeldt et al., 2005). The model under-predicted both MIB and geosmin removal seen in the experiments and could be used as a conservative prediction tool for a UV/H₂O₂ advanced oxidation process. Includes 2 references, tables, figures.