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Applicability of UV and UV/$H_2O_2$ Processes in the Control of Pharmaceuticals and Personal Care Products and Microbiological Safety for Water Reuse  

Kim, Il-Ho (Research Center for Environmental Quality Management, Graduate School of Engineering, Kyoto University)
Tanaka, Hiroaki (Research Center for Environmental Quality Management, Graduate School of Engineering, Kyoto University)
Publication Information
Journal of Korean Society of Environmental Engineers / v.32, no.7, 2010 , pp. 722-729 More about this Journal
Abstract
Over the last decades, much consideration has been given to microbiological and chemical risks, especially when wastewater was reclaimed as water resources for urban water, irrigation water and recreational water etc. We investigated the performance of UV-based processes such as UV and UV/$H_2O_2$ for both the removal of pharmaceuticals and personal care products (PPCPs) as an emerging chemical and the inactivation of pathogen with bench-scale experimental study. 38 kinds of PPCPs including antibiotics and analgesics were detected from secondary effluent used as tested water. Bench-scale experimental study showed that UV process would require considerable UV dose for the effective PPCPs removal. Contrarily, PPCPs removal efficiency significantly improved by the combination of $H_2O_2$ with UV even at a lower UV dose and, moreover, their removal efficiency increased with the increased initial $H_2O_2$ concentration. Besides naproxen (>89%), concentrations of all the investigated PPCPs decreased by more than 90% of their initial concentrations under $923\;mJ/cm^3$ of UV dose and 6.2 mg/L of $H_2O_2$. Previous studies showed that this operational condition could get 4~5 log inactivation for Total coliform, indicating that UV/$H_2O_2$ process will be appropriate to comply with the criteria of California Title 22 for Total coliform.
Keywords
PPCPs; Pathogen; UV; Water Reuse;
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