Characteristics of dissolved ozone flotation for the enhanced treatment of bio-treated drilling wastewater from a gas field

Jin, Xin; Zhang, Lei; Liu, Mengwen; Hu, Shiyi; Yao, Zhuodi; Liang, Jingwen; Wang, Rui; Xu, Likun; Shi, Xuan; Bai, Xue; Jin, Pengkang; Wang, Xiaochang C.

doi:10.1016/j.chemosphere.2022.134290

Cited by 7 publications

(4 citation statements)

References 50 publications

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“…The EfOMs and their fractions were obtained as powder through freeze-drying for further analysis of their structural and chemical characteristics using Fourier transform infra-red (FTIR) and X-ray photoelectron spectroscopies (XPS). Advantage software was applied for fitting the obtained spectra, which revealed the presence of functional groups, and the fitted peak binding energies for the C 1s peak of various carbon types including aromatic carbon (CC), aliphatic carbon (C–C), ketonic carbon (CO), carboxylic carbon (COOH), and alcohol/ether carbon (C–O) at 284.5 ± 0.3, 285.3 ± 0.3, 287.5 ± 0.4, 289.4 ± 0.4, and 286.3 ± 0.2 eV, respectively. − …”

Section: Methodsmentioning

confidence: 99%

Importance of Chain Length in Propagation Reaction on ^•OH Formation during Ozonation of Wastewater Effluent

Zou

Liu

Han

et al. 2023

Environ. Sci. Technol.

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During the ozonation of wastewater, hydroxyl radicals (•OH) induced by the reactions of ozone (O3) with effluent organic matters (EfOMs) play an essential role in degrading ozone-refractory micropollutants. The •OH yield provides the absolute •OH formation during ozonation. However, the conventional “tert-Butanol (t-BuOH) assay” cannot accurately determine the •OH yield since the propagation reactions are inhibited, and there have been few studies on •OH production induced by EfOM fractions during ozonation. Alternatively, a “competitive method”, which added trace amounts of the •OH probe compound to compete with the water matrix and took initiation reactions and propagation reactions into account, was used to determine the actual •OH yields (Φ) compared with that obtained by the “t-BuOH assay” (φ). The Φ were significantly higher than φ, indicating that the propagation reactions played important roles in •OH formation. The chain propagation reactions facilitation of EfOMs and fractions can be expressed by the chain length ( n ). The study found significant differences in Φ for EfOMs and fractions, precisely because they have different n . The actual •OH yield can be calculated by n and φ as Φ = φ (1 + n)/( nφ + 1), which can be used to accurately predict the removal of micropollutants during ozonation of wastewater.

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Section: Methodsmentioning

confidence: 99%

Importance of Chain Length in Propagation Reaction on ^•OH Formation during Ozonation of Wastewater Effluent

Zou

Liu

Han

et al. 2023

Environ. Sci. Technol.

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“…This consists of destabilizing the colloidal particles and forming larger flocs, in which the contaminants are trapped and these flocs can be separated from the solution by flotation or sedimentation [28]. The dissolved air flotation mechanism is effective in reducing the organic load [29] and dissolved ozone flotation gives efficient results in the removal of suspended solids [30,31]. For soluble contaminants, aluminum-based coagulants can act as catalysts for ozone and generate hydroxyl formation [22] and also oxidize surface functional groups of colloidal contaminants that promote colloid aggregation.…”

Section: Effect Of Initial Turbiditymentioning

confidence: 99%

Effects of the Operational Parameters in a Coupled Process of Electrocoagulation and Advanced Oxidation in the Removal of Turbidity in Wastewater from a Curtember

et al. 2022

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The tannery industry during its process generates various polluting substances such as organic matter from the skin and chemical inputs, producing wastewater with a high concentration of turbidity. The objective of this research is to evaluate the most appropriate operational parameters of the coupled process of electrocoagulation and advanced oxidation to achieve the removal of turbidity in wastewater from a tannery in the riparian zone (tannery). This process uses a direct current source between perforated aluminum electrodes of circular geometry submerged in the effluent, which causes the dissolution of the aluminum plates. For our study, an electrocoagulation unit coupled to an ozone generator has been built at the laboratory level, where the influence of five factors (voltage, inlet flow to the reactor, initial turbidity, pH, and ozone flow) has been studied with three levels with regarding turbidity, using the Taguchi experimental methodology. The optimal conditions for the removal of turbidity were obtained at 10 volts, 7.5 pH, 360 L/h of wastewater recirculation flow rate; 2400 mg/h of ozone flow rate; and 1130 NTU of initial turbidity of the sample in 60 min of treatment reaching a removal of 99.75% of the turbidity. Under optimal conditions, the removal of chemical oxygen demand (COD) and biochemical oxygen demand (BOD) was determined, reaching a removal percentage of 33.2% of COD and 39.36% of BOD was achieved. Likewise, the degree of biodegradability of the organic load obtained increased from 0.467 to 0.553.

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“…41 Dissolved ozone (DOF) is the name given to the process in which ozone, rather than air, is employed for the purpose of floating. 42 This study employs a strategy that involves the utilization of the ozone microbubble process for the oxidation of SCCs. In this process, ozone is dissolved in the fuel under high pressure and then appears in the form of microbubbles through pressure reduction during the oxidation process.…”

Section: Introductionmentioning

confidence: 99%

“…The DAF technique was extensively employed as the predominant method for generating micro/nano bubbles . Dissolved ozone (DOF) is the name given to the process in which ozone, rather than air, is employed for the purpose of floating …”

Section: Introductionmentioning

confidence: 99%

Novel Method for Desulfurization of Mixed Fuel via Microbubble Oxidation Followed by Microtube Extraction

Adhami,

Movahedirad,

Sobati

2024

Energy Fuels

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In this study, a novel method for the sulfur removal of the mixed fuel (70% vacuum gas oil and 30% natural gas condensate) using ozone microbubbles as the oxidant followed by solvent extraction in a millichannel has been investigated. In this regard, the mixed fuel was saturated with a gaseous oxidant (i.e., ozone) in a pressurized saturation chamber. After that, dissolved ozone appeared in the form of microbubbles by passing through a pressure-reducing valve, which could perform the oxidation of sulfur-containing compounds efficiently. It was revealed that ∼75% sulfur removal was achieved by oxidation of fuel for 60 min with an ozone saturating pressure of 2.5 barg, while the same level of the desulfurization was attained for 90 min of oxidation at 1.5 barg. Afterward, the oxidized sulfur compounds were removed by extraction inside a millichannel. It was found that the sulfur removal efficiency could be enhanced by 12% in comparison with solvent extraction using a batch contactor. Chemical consumption and energy input requirement are the other factors characterized in this study and compared with the conventional oxidative desulfurization process. The results have revealed that applying a saturating pressure of 1.5 barg for 120 min of ozonation has decreased the energy consumption by about 15% to achieve a certain desulfurization level.

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Characteristics of dissolved ozone flotation for the enhanced treatment of bio-treated drilling wastewater from a gas field

Cited by 7 publications

References 50 publications

Importance of Chain Length in Propagation Reaction on ^•OH Formation during Ozonation of Wastewater Effluent

Importance of Chain Length in Propagation Reaction on ^•OH Formation during Ozonation of Wastewater Effluent

Effects of the Operational Parameters in a Coupled Process of Electrocoagulation and Advanced Oxidation in the Removal of Turbidity in Wastewater from a Curtember

Novel Method for Desulfurization of Mixed Fuel via Microbubble Oxidation Followed by Microtube Extraction

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Characteristics of dissolved ozone flotation for the enhanced treatment of bio-treated drilling wastewater from a gas field

Cited by 7 publications

References 50 publications

Importance of Chain Length in Propagation Reaction on •OH Formation during Ozonation of Wastewater Effluent

Importance of Chain Length in Propagation Reaction on •OH Formation during Ozonation of Wastewater Effluent

Effects of the Operational Parameters in a Coupled Process of Electrocoagulation and Advanced Oxidation in the Removal of Turbidity in Wastewater from a Curtember

Novel Method for Desulfurization of Mixed Fuel via Microbubble Oxidation Followed by Microtube Extraction

Contact Info

Product

Resources

About

Importance of Chain Length in Propagation Reaction on ^•OH Formation during Ozonation of Wastewater Effluent

Importance of Chain Length in Propagation Reaction on ^•OH Formation during Ozonation of Wastewater Effluent