Developments in computational fluid dynamics-based modeling for disinfection technologies over the last two decades: A review

Zhang, Jie; Tejada-Martínez, Andrés; Zhang, Qiong

doi:10.1016/j.envsoft.2014.04.003

Cited by 69 publications

(42 citation statements)

References 133 publications

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“…Figure 1b ii depicts the associated modified geometry and this tank design is henceforth referred to as CT-2. Similarly, areas behind baffle corners are prone to recirculation, which can be more substantial than in corners [4,21,39]. Set-up CT-3, as depicted in Fig.…”

Section: Contact Tank Design Modificationsmentioning

confidence: 99%

“…For detailed reviews of recent CT research advances, the interested reader is directed to the work of Zhang et al [39] and Rauen et al [27].…”

Section: Introductionmentioning

confidence: 99%

“…Recently, disinfection specific processes, such as disinfectant decay and pathogen inactivation, have been modelled numerically by several authors [5,[37][38][39], which has been achieved through the incorporation of mathematical formulations representing kinetic processes and interactions. For detailed reviews of recent CT research advances, the interested reader is directed to the work of Zhang et al [39] and Rauen et al [27].…”

Section: Introductionmentioning

confidence: 99%

“…While the design of CTs somewhat depends on the disinfection method adopted, they are frequently divided into compartments using internal baffles, thus facilitating a meandering flow structure. Ideally, the hydrodynamics in serpentine CTs resembles plug flow conditions [27,39]. For plug flow and a uniform crosssectional distribution of the disinfectant (e.g.…”

Section: Introductionmentioning

confidence: 99%

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Contact Tank Design Impact on Process Performance

Angeloudis

Stoesser

Gualtieri

et al. 2016

Environ Model Assess

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In this study three-dimensional numerical models were refined to predict reactive processes in disinfection contact tanks (CTs). The methodology departs from the traditional performance assessment of contact tanks via hydraulic efficiency indicators, as it simulates directly transport and decay of the disinfectant, inactivation of pathogens and accumulation of by-products. The method is applied to study the effects of inlet and compartment design on contact tank performance, with special emphasis on turbulent mixing and minimisation of internal recirculation and short-circuiting. In contrast to the conventional approach of maximising the length-to-width ratio, the proposed design changes are aimed at addressing and mitigating adverse hydrodynamic structures, which have historically led to poor hydraulic efficiency in many existing contact tanks. The results suggest that water treatment facilities can benefit from in-depth analyses of the flow and kinetic processes through computational fluid dynamics, resulting in up to 38 % more efficient pathogen inactivation and 14 % less disinfection by-product formation.

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Section: Contact Tank Design Modificationsmentioning

confidence: 99%

“…For detailed reviews of recent CT research advances, the interested reader is directed to the work of Zhang et al [39] and Rauen et al [27].…”

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Contact Tank Design Impact on Process Performance

Angeloudis

Stoesser

Gualtieri

et al. 2016

Environ Model Assess

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show abstract

“…Moreover, on-site parameters are dynamic and one cannot afford lengthy experimental investigations. Hence, any modification brought to increase hydraulic efficiency can be undertaken with the help of CFD tools [14,20,[22][23][24][25]. A thorough analysis aims to enable a uniform distribution of chlorine in the tank and the elimination of dead zones.…”

Section: Introductionmentioning

confidence: 99%

Spiral-shaped reactor for water disinfection

Soukane

Ait-Djoudi

Naceur

et al. 2016

Desalination and Water Treatment

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Chlorine based processes are still widely used for water disinfection. The disinfection process for municipal water consumption is usually carried out in large tanks, specifically designed to verify several hydraulic and disinfection criteria. The hydrodynamic behavior of contact tanks of different shapes, each with an approximate total volume of 50,000 m 3 , was analyzed by solving turbulent momentum transport equations with a computational fluid dynamics (CFD) code, namely ANSYS fluent. Numerical experiments of a tracer pulse were performed for each design to generate flow through curves and investigate species residence time distribution for different inlet flow rates, ranging from 3 m 3 ·s -1 to 12 m 3 ·s -1 . A new nature inspired Conch tank design of which shape follows an Archimedean spiral was then developed. The spiral design is shown to strongly outperform the other tanks designs for all the selected plug flow criteria with an enhancement in efficiency, less short-circuiting and an order of magnitude improvement in mixing and dispersion. Moreover, following the intensification philosophy, after 50% reduction of its size, the new design retains its properties and still gives far better results than the classical shapes.

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Drinking Water Treatment Unit Processes: Computational Fluid Dynamics Modeling

Ladner¹,

Zhou²,

Xie³

2019

Encyclopedia of Water

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The conventional drinking water treatment plant train of unit processes includes an intake structure, rapid mix, flocculation, sedimentation, granular media filtration, disinfection, and distribution. As populations grow and unconventional sources of water are sought, alternative unit processes are becoming more common, such as ozonation and reverse osmosis. Novel ideas to accomplish certain goals in the treatment plant have resulted in modified processes that function differently than their conventional counterparts; static mixers are one example. With this changing landscape of drinking water treatment, it behooves engineers to use modern tools to compare options and optimize their designs. Computational fluid dynamics (CFD) modeling is a method for accomplishing those goals. This article discusses CFD modeling in the context of the above drinking water treatment plant unit processes. The most common software packages are discussed, including ANSYS Fluent, COMSOL Multiphysics, and OpenFOAM. With each unit process, the goals of CFD modeling are explored. Some common threads emerge among processes, such as the utility of identifying dead zones or eddies in vessels and the importance of calculating shear and mixing intensity. This article thus serves as an overview for practitioners or others interested in using CFD as a drinking‐water treatment plant design tool.

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Developments in computational fluid dynamics-based modeling for disinfection technologies over the last two decades: A review

Cited by 69 publications

References 133 publications

Contact Tank Design Impact on Process Performance

Contact Tank Design Impact on Process Performance

Spiral-shaped reactor for water disinfection

Drinking Water Treatment Unit Processes: Computational Fluid Dynamics Modeling

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