Investigation on Energetic Efficiency of Reactor Systems for Oxidation of Micro-Pollutants by Immobilized Active Titanium Dioxide Photocatalysis

In this work, the degradation performance for photocatalytic oxidation of eight micro-pollutants (amisulpride, benzotriazole, candesartan, carbamazepine, diclofenac, gabapentin, methlybenzotriazole, and metoprolol) within real secondary effluent was investigated using three different reactor designs. For all types, influence irradiation power on its reaction rate energetic efficiency investigated. Flat cell batch showed almost similar substance specific behavior. Within immersion rotary body reactor, benzotriazole methyl-benzotriazole a significantly lower affinity. The flat achieved highest mean rate, with half time values ranging from 5 to 64 min 18 min, due high catalysts surface hydraulic volume ratio. EE/O were calculated as well constant each experimental step. lowest energy per order (EE/O) kWh/m3 measured reactor. also reached (11.8–15.9 kWh/m3) followed by (21.0–37.0 (23.9–41.0 kWh/m3). Catalyst arrangement identified major influences reactors. Low radiation intensities use submerged catalyst allowed reduction in demand factor 3–4. A treatment according existing goals wastewater plants (80% total degradation) 7000 Wh/m3.