Prediction of micropollutant elimination during ozonation of a hospital wastewater effluent

Lee, Yunho; Kovalova, Lubomira; McArdell, Christa S.; Gunten, Urs von

doi:10.1016/j.watres.2014.06.027

Cited by 207 publications

(93 citation statements)

References 52 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Furthermore, the removal of each compound from different effluent samples of the same source treated with the same ozone dose differed considerably. This is in accordance with previous findings [6,7,10,26]. In order to determine the ozone dose that is required to achieve 90 % removal of each pharmaceutical, the data in Figure 2 were fitted with Equation 5.…”

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

confidence: 85%

See 1 more Smart Citation

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

Hansen

Spiliotopoulou²,

Chhetri

et al. 2016

Chemical Engineering Journal

130

View full text Add to dashboard Cite

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.

show abstract

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

confidence: 85%

“…This variation is due to the different molecular structures of the investigated compounds. Some react fast with ozone, while others react slower and then the reaction with hydroxyl radicals will be important for the degradation of a compound [10,26,28]. …”

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

130

View full text Add to dashboard Cite

show abstract

“…3), except diclofenac (95.0% removal) and ibuprofen (99.3% removal), which are more refractory than all the others, as well as carbamazepine and fluoxetine which were significantly removed but still detected under the MQL after the ozonation process. In general, the removal rates obtained for most compounds were above those reported in other works leading with ozonation at real concentrations in WWTP effluents [16,[31][32][33], except for diclofenac [16,32]. Although the effectiveness of ozonation for the removal of the studied organic compounds, the scarce implementation of such technology to urban wastewaters is mainly related to the lack of legislation and analytical methods for micropollutants in this particular type of wastes, despite of other shortcomings as the common presence of scavengers in these wastewaters, as well as the possible formation of reaction by-products more toxic than the parent compounds [7].…”

Section: Quantification Of Micropollutants In Wwtp Effluents Before Asupporting

confidence: 43%

Environmental friendly method for urban wastewater monitoring of micropollutants defined in the Directive 2013/39/EU and Decision 2015/495/EU

Ribeiro

Pedrosa

Moreira

et al. 2015

Journal of Chromatography A

View full text Add to dashboard Cite

“…Choi et al [47] performed bench and pilot scale tests with river water to re- ), with alkaline pH, and after contact for 7 minutes obtained removal rates of 60% to 100%. In turn, Gerrity et al [48] Lee et al [49] studied the removal of 25 drugs in hospital effluent by ozonation. They observed that the removal percentages of these compounds at pH of 7 and 8 depended on the initial ozone dose and that the addition of H 2 O 2 enhanced the reaction efficiency, due to the generation of hydroxyl radicals.…”

Section: Advanced Oxidation Processmentioning

confidence: 99%

Micropollutant Removal from Water by Membrane and Advanced Oxidation Processes—A Review

Silva¹,

Moreira²,

Curzio³

et al. 2017

JWARP

View full text Add to dashboard Cite

Micropollutants are defined as contaminants found in trace concentrations in water bodies that are persistent and bioactive, meaning they are not completely biodegradable and cannot be removed by conventional water treatment methods. Because of these aspects, their detection and removal pose a challenge to the scientific community. Among them are endocrine disruptors, drugs, agricultural chemicals, personal grooming products, industrial additives and others. These micropollutants are the cause for global concern, because their presence in water supply systems is suspected of causing health problems in humans and animals. To develop efficient techniques to remove them, it is fundamental to understand their physico-chemical properties and the available treatment types and conditions. Membrane separation processes (MSPs) and advanced oxidation processes (AOPs) are the focus of this literature review, as potential treatment methods to remove micropollutants. The former process stands out for high rejection rates (above 90%) of various micropollutants, but it generates a concentrated secondary waste stream. In turn, the latter process can remove micropollutants without generating secondary wastes, and can also be applied and combined with other treatment methods.

show abstract

Prediction of micropollutant elimination during ozonation of a hospital wastewater effluent

Cited by 207 publications

References 52 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

Environmental friendly method for urban wastewater monitoring of micropollutants defined in the Directive 2013/39/EU and Decision 2015/495/EU

Micropollutant Removal from Water by Membrane and Advanced Oxidation Processes—A Review

Contact Info

Product

Resources

About