Ozonation and Advanced Oxidation of Wastewater: Effect of O3Dose, pH, DOM and HO•-Scavengers on Ozone Decomposition and HO•Generation

Buffle, Marc-Olivier; Schumacher, Jochen; Meylan, Sébastien; Jekel, Martin; Gunten, Urs von

doi:10.1080/01919510600718825

Cited by 228 publications

(135 citation statements)

References 25 publications

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“…The obtained DDO 3 increases with increasing DOC for all the investigated compounds (Table 1). Buffle et al [27] have found that DOC is crucial for ozone exposure and that the ozone dose should be normalized with DOC for comparison of different water. Thus, the delivered ozone doses were normalized with DOC and the specific DDO 3 was determined.…”

Section: Effect Of Doc On Required Ozone Dosage For Pharmaceuticals Rmentioning

confidence: 99%

Ozonation for source treatment of pharmaceuticals in hospital wastewater – Ozone lifetime and required ozone dose

Hansen

Spiliotopoulou²,

Chhetri

et al. 2016

Chemical Engineering Journal

131

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Highlights:  Ozone dosage was determined for pharmaceuticals removal in hospital wastewater  The ozone dosage required varied 2-fold with both DOC and pH experienced over time  DOC normalized ozone dosage for 90% removal of 32 pharmaceuticals was determined  At low pH, pharmaceuticals need less ozone while ozone lifetime increased to 20 min  H 2 O 2 dosing shorten the ozone lifetime at low pH to 5 min similar to neutral pH 2 Abstract: Ozonation aimed at removing pharmaceuticals was studied in an effluent from an experimental pilot system using staged Moving Bed Biofilm Reactor (MBBR) tanks for the optimal biological treatment of wastewater from a medical care unit of Aarhus University Hospital. Dissolved Organic Carbon (DOC) and pH in samples varied considerably, and the effect of these two parameters on ozone lifetime and the efficiency of ozone in removing pharmaceuticals were determined. The pH in the effluent varied from 5.0 to 9.0 resulting in approximately a doubling of the required ozone dose at the highest pH for each pharmaceutical. DOC varied from 6 to 20 mg-DOC/L. The ozone required for removing each pharmaceutical, varied linearly with DOC and thus, ozone doses normalized to DOC (specific ozone dosis) agreed between water samples (typically within 15%). At neutral pH the specific ozone dose required to remove the easiest degradable pharmaceutical, sulfadiazine, was 0.50±0.04 mg-O 3 /mg-DOC and the most recalcitrant, diatrizoic acid, required 4.7±0.6 mg-O 3 /mg-DOC. The lifetime of ozone increased drastically in the higher end of the indicated dosage. At the lowest observed pH of 5.0, its lifetime was quadrupled to 20 min which influences the design of the reaction tank. The addition of 0.1 mg-H 2 O 2 per 1 mg-O 3 mitigated the prolonged lifetime without a corresponding influence in the pharmaceutical removal efficiency of ozone.

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Section: Effect Of Doc On Required Ozone Dosage For Pharmaceuticals Rmentioning

confidence: 99%

Ozonation for source treatment of pharmaceuticals in hospital wastewater – Ozone lifetime and required ozone dose

Hansen

Spiliotopoulou²,

Chhetri

et al. 2016

Chemical Engineering Journal

131

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“…Compared with other advanced treatments such as Fenton's regent oxidation, membrane filtration and activated carbon adsorption, ozone and UV/H 2 O 2 have no requirement for pH adjustment, sludge disposal, membrane backwash, or adsorbent regeneration, thus are commonly applied for water and wastewater treatment [12,14]. In addition, water matrix, especially the type and content of natural organic or inorganic matter, can affect the oxidation of organic pollutants by competing for the oxidant and/or affecting the generation of Å OH [15][16][17]. However, there is little research concerning the effect of water matrix on the removal of OPEs in ozone and UV/H 2 O 2 treatments.…”

Section: Introductionmentioning

confidence: 99%

Removal of organophosphate esters from municipal secondary effluent by ozone and UV/H2O2 treatments

Yuan

Lacorte

Cristale

et al. 2015

Separation and Purification Technology

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a b s t r a c tOrganophosphate esters (OPEs) have emerged as a new class of contaminants due to their massive use as flame retardants and plasticizers. These contaminants are toxic to aquatic organisms and some of them are not biodegradable in wastewater treatment plants. This study investigated the degradation kinetics of eight typical OPEs during ozone and UV/H 2 O 2 treatments in Milli-Q water, humic acid (HA) solution, and municipal secondary effluent. The studied OPEs included three chlorinated: tris(2-chloroethyl) phosphate (TCEP), tris(chloropropyl) phosphate (TCPP) and tris(dichloropropyl) phosphate (TDCP); two aromatic: triphenyl phosphate (TPhP) and tricresyl phosphate (TCrP); and three aliphatic: tri-n-butyl phosphate (TnBP), tris(2-butoxyethyl) phosphate (TBEP), and tris(2-ethylhexyl) phosphate (TEHP). Results indicate that the degradation of target OPEs conformed to the pseudo-first-order kinetics and UV/H 2 O 2 was more effective than ozone for their elimination by comparing the overall removal efficiencies and energy consumptions. Two aromatic and two aliphatic OPEs (i.e., TPhP, TCrP, TnBP and TBEP) were effectively degraded by ozone and UV/H 2 O 2 in the test water matrices, while all chlorinated and one aliphatic OPEs (i.e., TCEP, TCPP, TDCP and TEHP) were found to be recalcitrant to oxidation. Moreover, the presence of HA significantly enhanced the degradation of reactive OPEs in ozone treatment.

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“…The use of ozone for the transformation of TOrCs, including pharmaceuticals and personal care products (PPCPs) and endocrine disrupting compounds (EDCs), has been studied extensively in the literature (Huber et al, 2003(Huber et al, , 2004Buffle et al, 2006;Lee et al, 2008;Dodd et al, 2009;von Sonntag and von Gunten, 2012). Studies specifically addressing the efficacy of ozone for TOrC elimination, reductions in estrogenicity, and the effects on toxicity have also been performed in pilot-and full-scale systems (Huber et al, 2005;Hollender et al, 2009;Wert et al, 2009a;Stalter et al, 2010aStalter et al, , 2010bGerrity et al, 2011a;Gerrity and Snyder, 2011;Zimmermann et al, 2011).…”

Section: Introductionmentioning

confidence: 99%

“…Therefore, DUVdmore specifically, DUV 254 dand DTF currently offer the most promising tools to supplement existing analytical methods based on liquid or gas chromatography and mass spectrometry (LCeMS or GCeMS). Buffle et al (2006) proposed the use of DUV to determine ozone exposure in wastewater applications after observing a first-order kinetic relationship between the two parameters. Based on this concept, Bahr et al (2007), Wert et al (2009b), and Nanaboina and Korshin (2010) developed preliminary correlations between DUV 254 and several indicator compounds and microbes.…”

Section: Introductionmentioning

confidence: 99%

Development of surrogate correlation models to predict trace organic contaminant oxidation and microbial inactivation during ozonation

et al. 2012

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a b s t r a c tThe performance of ozonation in wastewater depends on water quality and the ability to form hydroxyl radicals ( OH) to meet disinfection or contaminant transformation objectives. Since there are no on-line methods to assess ozone and OH exposure in wastewater, many agencies are now embracing indicator frameworks and surrogate monitoring for regulatory compliance. Two of the most promising surrogate parameters for ozone-based treatment of secondary and tertiary wastewater effluents are differential UV 254 absorbance

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Ozonation and Advanced Oxidation of Wastewater: Effect of O₃Dose, pH, DOM and HO^•-Scavengers on Ozone Decomposition and HO^•Generation

Cited by 228 publications

References 25 publications

Ozonation for source treatment of pharmaceuticals in hospital wastewater – Ozone lifetime and required ozone dose

Ozonation for source treatment of pharmaceuticals in hospital wastewater – Ozone lifetime and required ozone dose

Removal of organophosphate esters from municipal secondary effluent by ozone and UV/H2O2 treatments

Development of surrogate correlation models to predict trace organic contaminant oxidation and microbial inactivation during ozonation

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