Some ozone advanced oxidation processes to improve the biological removal of selected pharmaceutical contaminants from urban wastewater

Abstract

Removal of nine pharmaceutical compounds: acetaminophen, AAF, antipyrine, ANT, caffeine, CAF, carbamazepine, CRB, diclofenac, DCF, hydrochlorothiazide, HCT, ketorolac, KET, metoprolol, MET and sulfamethoxazole, SMX, spiked in a primary sedimentation effluent of a municipal wastewater has been studied with sequential aerobic biological and ozone advanced oxidation systems. Ozone, UVA or Fe(III) during photocatalytic ozonations also allowed mineralization increases, compared to the single ozonation process, from 13% to about 35%. Biodegradability of the treated wastewater increased 50% in the biological process and other 150% after the ozonation processes. Both untreated and treated wastewater was non toxic for Daphnia Magna except when Fe(III) was used in photocatalytic ozonation. In this case, the ferryoxalate formed seems to be the reason of toxicity. Kinetic information on ozone processes reveals that pharmaceuticals at the very low concentrations they are found in urban wastewater are mainly removed through free radical oxidation.2

Treatment technologies for emerging contaminants in water: A review

“…Several researchers have suggested coupling different processes that can act together to enhance removal efficiency [148,[186][187][188][189][190][191]. The application of sequentially coupled treatment processes for the removal of ECs in water has been barely attempted and represent an important knowledge gap to be bridged.…”

Photocatalytic ozonation of urban wastewater and surface water using immobilized TiO2 with LEDs: Micropollutants, antibiotic resistance genes and estrogenic activity

“…However, more studies are still needed to better understand the effect of the oxidative approaches on the control of ARB&ARG. For instance, photocatalytic ozonation has been studied for the removal of pharmaceuticals in effluents from urban WWTPs (Beltr' an et al, 2012;Encinas et al, 2013;Espejo et al, 2013;Li et al, 2007;Ma 'rquez et al, 2014;Moreira et al, 2015;Quiñones et al, 2015;Rey et al, 2014;Tanaka et al, 2001), and a couple of reviews were published last year (Mehrjouei et al, 2015;Xiao et al, 2015), but not much is known about the potential of photocatalytic ozonation to remove ARB&ARGs from urban wastewater. Much less information can be found regarding surface water.…”

Hospital Wastewater Treatment with Pilot-Scale Pulsed Corona Discharge for Removal of Pharmaceutical Residues

“…Siqueira Souza and Amaral Féris [30], Broséus et al [31] and Ganzenko et al [32] confirmed these observations in various AOPs with hard mineralization. A series of publications reported caffeine being oxidized more effectively in combination of ozone with catalysts and photocatalytic oxidation [33][34][35][36]. Analogously, dielectric barrier discharge (DBD) exhibited efficiency improved by a goethite catalyst [37].…”