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Use of Ozone‐Based Processes for the Removal of Pharmaceuticals Detected in a Wastewater Treatment Plant
Ozone (O3)‐based processes (O3, O3/H2O2, and O3/UV) were investigated for the removal of pharmaceuticals in real wastewater using a bench‐scale experimental setup. An ozone dose of 6 mg/L (contact time = 10 minutes) was found to reduce the concentration of most pharmaceuticals detected in secondary effluent. Caffeine, N,N‐Diethyl‐meta‐toluamide (DEET), and cyclophosphamide were removed with efficiencies of 84, 89, and 46%, respectively, even with a contact time of 15 minutes (O3 dose = 6 mg/L). In the case of the ozone process alone, the concentration of bromate ion in the effluent increased with longer contact time. On the other hand, it was found that the O3/H2O2 and O3/UV processes can be used as alternative processes for effective removal of pharmaceuticals, while leaving a low residual concentration of dissolved ozone in the system, thereby preventing bromate formation.
Use of Ozone‐Based Processes for the Removal of Pharmaceuticals Detected in a Wastewater Treatment Plant
Ozone (O3)‐based processes (O3, O3/H2O2, and O3/UV) were investigated for the removal of pharmaceuticals in real wastewater using a bench‐scale experimental setup. An ozone dose of 6 mg/L (contact time = 10 minutes) was found to reduce the concentration of most pharmaceuticals detected in secondary effluent. Caffeine, N,N‐Diethyl‐meta‐toluamide (DEET), and cyclophosphamide were removed with efficiencies of 84, 89, and 46%, respectively, even with a contact time of 15 minutes (O3 dose = 6 mg/L). In the case of the ozone process alone, the concentration of bromate ion in the effluent increased with longer contact time. On the other hand, it was found that the O3/H2O2 and O3/UV processes can be used as alternative processes for effective removal of pharmaceuticals, while leaving a low residual concentration of dissolved ozone in the system, thereby preventing bromate formation.
Use of Ozone‐Based Processes for the Removal of Pharmaceuticals Detected in a Wastewater Treatment Plant
Kim, Ilho (author) / Tanaka, Hiroaki (author)
Water Environment Research ; 82 ; 294-301
2010-04-01
8 pages
Article (Journal)
Electronic Resource
English
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