Enhanced removal of refractory humic- and fulvic-like organics from biotreated landfill leachate by ozonation in packed bubble columns

Yang, Xuetong; Buyck, Pieter-Jan De; Zhang, Rui; Manhaeghe, Dave; Wang, Hao; Chen, Licai; Zhao, Yunliang; Demeestere, Kristof; Hulle, Stijn Van

doi:10.1016/j.scitotenv.2021.150762

Cited by 25 publications

(23 citation statements)

References 88 publications

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Section: Evaluation Of the Channeling Flow Problemsupporting

confidence: 77%

“…Moreover, the low maintenance cost of this reactor type provides specialized criteria in comparison with other multiphase reactors. The same observations were confirmed by many authors such as Majhool et al [11], Liu et al [14], and Yang et al [46]. Yang et al [3], Sukkar et al [13], and Manjrekar and Dudukovic [24] have indicated that the channeling problem must be avoided because after this point of high velocity, the pressure drops will provide a higher rate that will carry off all liquid, creating a flooding point.…”

Section: Evaluation Of the Channeling Flow Problemsupporting

confidence: 59%

“…Cao et al [45] applied a micro-packed bed reactor with ozone to improve the dissolution rate of ozone and achieve high degradation of organic pollutants, noting that the phenol and COD removal recorded values of 100 and 86.4%, respectively, at optimal operating conditions. Yang et al [46] evaluated the feasibility of the application of packed bubble columns in actual biotreated landfill leachate treatment, providing new information about the transformation of organic matter in leachates during ozonation. For example, their study demonstrated that a packed bubble column increased the removal and decreased the energy use when treating landfill leachate, thus promoting the application of ozonation.…”

Section: Introductionmentioning

confidence: 99%

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Integrated Process for High Phenol Removal from Wastewater Employing a ZnO Nanocatalyst in an Ozonation Reaction in a Packed Bubble Column Reactor

Majhool,

Sukkar,

Alsaffar

et al. 2023

ChemEngineering

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The use of an ozonized bubble column reactor (OBCR) in wastewater treatment is advantageous due to its efficient mixing and mass transfer characteristics. Among all high-performance features, the ozonation reaction in a BCR undergoes a low dissolution of O3 in the reactor with a limited reaction rate. In this study, the ozonation reaction of phenol in an OBCR was tested using a ZnO nanocatalyst and alumina balls as packing material. Three concentrations of O3 were evaluated (i.e., 10, 15, and 20 ppm), and 20 ppm was found to be the optimum concentration for phenol degradation. Also, two doses (i.e., 0.05 and 0.1 g/L) of ZnO nanocatalysts were applied in the reaction mixture, with the optimal dose found to be 0.1 g/L. Accordingly, three phenol concentrations were investigated in the OBCR (i.e., 15, 20, and 25 ppm) using four treatment methods (i.e., O3 alone, O3/Al2O3, O3/ZnO nanocatalyst, and O3/Al2O3/ZnO nanocatalyst). At a contact time of 60 min and phenol concentration of 15 ppm, the removal rate was 66.2, 73.1, 74.5, and 86.8% for each treatment method, respectively. The treatment experiment that applied the O3/Al2O3/ZnO nanocatalyst produced the highest phenol conversion into CO2 and H2O in the shortest contact time for all phenol concentrations. Thus, the OBCR employed with a ZnO nanocatalyst plus packing material is a promising technology for the rapid and active removal of phenol because it enhances the number of hydroxyl radicals (•OH) generated, which ultimately increases the oxidation activity in the OBCR. Also, the results showed efficient flow characteristics in the OBCR, with channeling problems averted due to appropriate gas movement resulting from the use of packing materials. Finally, it was found that the ozonation process in an OBCR is an efficient method for phenol conversion with good economic feasibility.

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Section: Evaluation Of the Channeling Flow Problemsupporting

confidence: 77%

Section: Evaluation Of the Channeling Flow Problemsupporting

confidence: 59%

Section: Introductionmentioning

confidence: 99%

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Integrated Process for High Phenol Removal from Wastewater Employing a ZnO Nanocatalyst in an Ozonation Reaction in a Packed Bubble Column Reactor

Majhool,

Sukkar,

Alsaffar

et al. 2023

ChemEngineering

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“…24−26 Recent studies applied lava rock as packing material for an O 3 reactor and found that it could enhance the O 3 mass transfer and promote refractory organic compound degradation. 21,22,25 These studies also demonstrate that lava rock has a better performance than commercial metal packing materials because of its adsorptive and catalytic functions in the ozonation process. An interesting alternative is expanded clay aggregates (ECA) which, different from natural minerals, are pelleted at temperatures above 1000 °C in their formal shape.…”

Section: Introductionmentioning

confidence: 97%

“…Lava rock (formed by cooling magma) is a low-cost mineral, and it is abundant on earth . Due to its advantages of high porosity, high mechanical strength, high adsorption capacity, and containing a variety of metal oxides, lava rock has been used for (waste)water treatment mainly as an adsorbent, filter material, and a catalyst. − Recent studies applied lava rock as packing material for an O 3 reactor and found that it could enhance the O 3 mass transfer and promote refractory organic compound degradation. ,, These studies also demonstrate that lava rock has a better performance than commercial metal packing materials because of its adsorptive and catalytic functions in the ozonation process. An interesting alternative is expanded clay aggregates (ECA) which, different from natural minerals, are pelleted at temperatures above 1000 °C in their formal shape .…”

Section: Introductionmentioning

confidence: 99%

Enhanced Production and Recovery of Orthophosphate from Wastewater Containing Phosphonate 1-Hydroxyethane-1,1-diphosphonic Acid through Combined Packed-Bed Ozonation and Adsorption

Yang

Manhaeghe

Zhang

et al. 2021

ACS Sustainable Chem. Eng.

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Phosphonates are widely used in industrial and household applications. Phosphorus (P) removal and recovery from phosphonates in wastewater require a (cost-)efficient process. This study developed a two-step approach for this challenge. In the first step, lava rock and expanded clay aggregates (ECA) were used to build two packed O 3 bubble columns (LBC and EBC, respectively) and were compared with a nonpacked bubble column (BC). After 90 min of ozonation, the net production efficiency of orthophosphate (Ortho-P) from a commonly used phosphonate in the textile industry [1-hydroxyethane-1,1-diphosphonic acid (HEDP)] was higher in the LBC (66%), followed by the BC (59%) and EBC (44%). The lowest Ortho-P production efficiency in the EBC was because a high fraction of the produced Ortho-P was adsorbed on the surface of the ECA. However, when the adsorptive packing materials were reused during five consecutive ozonation cycles, the Ortho-P adsorption sites on the packing materials tended to be saturated. As such, the net production efficiency of Ortho-P in the LBC and EBC increased to 86 and 72%, respectively. In the second step, iron-coated sand granules were used to adsorb and recover the produced Ortho-P. Higher Ortho-P recovery efficiencies (66.4% for the LBC and 61.9% for the EBC) and Ortho-P sorption capacities (12.05 mg/g for the LBC and 8.13 mg/g for the EBC) were achieved in combination with packed-bed ozonation. This study provides insights into HEDP removal from wastewater and the recovery of Ortho-P as a valuable resource, which fits within the development of sustainable wastewater treatment processes.

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Degradation of Micropollutants in Water by O Atoms Produced by an Atmospheric Pressure He/O₂ Plasma Jet

Chen,

Lukeš,

Jirásek

et al. 2024

Plasma Processes & Polymers

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An atmospheric pressure He/O2 COST reference microplasma jet was used to study interactions of O atoms with four different organic micropollutants used as target compounds treated by plasma in water (atrazine, carbamazepine, 1,7‐α‐ethinylestradiol, and bisphenol A). Various ratios of O2 to He were used to achieve different exposures of reactive oxygen species to the plasma‐treated micropollutants, and their degradation efficiencies were determined. The degradation of all four micropollutants was merely associated with the variable exposure to the O atom, whereas the role of O3 was minimal. A comprehensive investigation was conducted on the degradation pathways and toxicity reduction assessment of atrazine after the treatment by plasma.

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Enhanced removal of refractory humic- and fulvic-like organics from biotreated landfill leachate by ozonation in packed bubble columns

Cited by 25 publications

References 88 publications

Integrated Process for High Phenol Removal from Wastewater Employing a ZnO Nanocatalyst in an Ozonation Reaction in a Packed Bubble Column Reactor

Integrated Process for High Phenol Removal from Wastewater Employing a ZnO Nanocatalyst in an Ozonation Reaction in a Packed Bubble Column Reactor

Enhanced Production and Recovery of Orthophosphate from Wastewater Containing Phosphonate 1-Hydroxyethane-1,1-diphosphonic Acid through Combined Packed-Bed Ozonation and Adsorption

Degradation of Micropollutants in Water by O Atoms Produced by an Atmospheric Pressure He/O₂ Plasma Jet

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Enhanced removal of refractory humic- and fulvic-like organics from biotreated landfill leachate by ozonation in packed bubble columns

Cited by 25 publications

References 88 publications

Integrated Process for High Phenol Removal from Wastewater Employing a ZnO Nanocatalyst in an Ozonation Reaction in a Packed Bubble Column Reactor

Integrated Process for High Phenol Removal from Wastewater Employing a ZnO Nanocatalyst in an Ozonation Reaction in a Packed Bubble Column Reactor

Enhanced Production and Recovery of Orthophosphate from Wastewater Containing Phosphonate 1-Hydroxyethane-1,1-diphosphonic Acid through Combined Packed-Bed Ozonation and Adsorption

Degradation of Micropollutants in Water by O Atoms Produced by an Atmospheric Pressure He/O2 Plasma Jet

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Product

Resources

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Degradation of Micropollutants in Water by O Atoms Produced by an Atmospheric Pressure He/O₂ Plasma Jet