Comparative study of energy consumption, kinetic, and performance between conventional and baffled photocatalytic reactor (BPCR) to ofloxacin photo-degradation

Karimi, Pouria; Sadani, Mohsen; Azarpira, Hossein; Rasolevandi, Tayebeh; Sarafraz, Mansour

Comparative study of energy consumption, kinetic, and performance between conventional and baffled photocatalytic reactor (BPCR) to ofloxacin photo-degradation

2022

Karimi, Pouria | Sadani, Mohsen | Azarpira, Hossein | Rasolevandi, Tayebeh | Sarafraz, Mansour

Regarding the cost-effective photo-degradation of ofloxacin (OFL), present study investigates UV/sulfite /ZnO (USZ) in reactor conventional (without baffles) and baffled photocatalytic reactor (BPCR). The optimal condition was 0.77:2:50 sulfite/ZnO/OFL molar ratio, pH 7, and 30 min reaction time for 100% degradation of 200 mg L⁻¹ concentration of OFL. As information obtained, the UZI process reduces the BOD and COD level about 66% to 86.29% within 80 min reaction, respectively. Also, BOD/COD ratio initial from 0.26 reaches 0.6 after 30 min of reaction time. Kinetic investigation increasing OFL concentration, kₒbₛ and rₒbₛ increase, and, secondly, in the conventional and BPCR reactor, kₒbₛ increase is about 17% and 50% with increasing OFL concentration from 50 to 200 mgL⁻¹. Also, figure-of-merit EEₒ varies from 12.66 to 17.41 and 7.26 to 10.15 kWhm³ for conventional reactor and 8.66–13.61 to 5.24–8.12 kWhm³, respectively. Also, kinetic model EEₒ declines from 15.23 to 8.61 and from 13.31 to 5.37 kWh m⁻³ in conventional and BPCR, respectively. Total cost of the system (TCS) decreases from 7.31 to 2.16 $ in conventional reactor and 4.57 to 0.55 $ in PCBR reactor. Total cost of the system (TCS) was investigated at different concentrations.

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