Optimization of water treatment plant flow distribution with CFD modeling of an influent channel

Knatz, Carrie; Rafferty, Stephen; DeLescinskis, Anthony

doi:10.2166/wqrjc.2014.024

Cited by 10 publications

(4 citation statements)

References 6 publications

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“…También, se estudió el efecto del ángulo aguas arriba en un flujo sobre un vertedero trapezoidal y las herramientas de código abierto de Openfoam [5]. Heyrani validó su estudio de canales abiertos con el coeficiente de determinación (R 2 ) y error porcentual absoluto medio (mape) [9].…”

Section: Revisión De Literatura O Antecedentes De Investigaciónunclassified

OpenFOAM reduced channel modeling análisis

Lara Pérez,

Nova Burgos,

Montenegro Carrillo

et al. 2023

ing. Solidar

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Introduction: The article is a product of the research “Analysis of open channel models with reduction in Openfoam” developed at Universidad Santo Tomás in 2022 integrating computational fluid dynamics (cfd), in an open channel with reduction of multiphase, isotropic, isothermal, turbulent and steady state flow. Problem: Drinking water supply requires efficient treatment, and to achieve this, the hydrodynamic and physicochemical processes of the treatment plant units must be known in detail. Simulation is used to reduce costs and to perform multiple experiments. A robust hydraulic parameter readout system increases the reliability of modeling [1]. The larger source of experimental data leads to a more reliable model. Objective: Familiarize the reader with the tools for learning and optimization of conventional treatment systems for human water supply. Research also contributes to ensuring environmental sustainability and reducing the proportion of people without sustainable access to water and sanitation services, especially in rural areas where lack of water infrastructure is a prevalent problem. Method: Simulation of complex turbulence models by means of energy, mass and momentum conservation equations by means of Openfoam solvers. Results: There is a convergence since time 5952, since after this time most of the residual limit values are in the order of 10-3 and 10-4, and taking into account the state of the art which states that the solution has converged if the residual is in the order of these values Conclusions: A contribution has been made to the knowledge of computational fluid dynamics, generating an approach to the modeling of channels to the students of the civil engineering faculty of the Santo Tomas University, for advances in future research, thus strengthening in an institutional way the use of Openfoam for the modeling of complex problems in water transport systems.

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Section: Revisión De Literatura O Antecedentes De Investigaciónunclassified

OpenFOAM reduced channel modeling análisis

Lara Pérez,

Nova Burgos,

Montenegro Carrillo

et al. 2023

ing. Solidar

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“…It may cause an uneven distribution of carriers [30], and different CFRs may lead to different αSOTE values. For the third possibility, the fouling of the diffusers had a more noticeable effect on fine-bubble aeration systems [39,40] but had little impact on coarse-bubble aeration systems [41]. Therefore, the reason for the difference in the distribution law of the fine-bubble and the coarse-bubble aeration systems may be different.…”

Section: Effects Of Aeration Type On the αSote Of Ifasmentioning

confidence: 99%

The Changing and Distribution Laws of Oxygen Transfer Efficiency in the Full-Scale IFAS Process

Liu

Huang³

et al. 2021

Water

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The integrated fixed-film activated sludge (IFAS) process has been widely used in the upgrading of wastewater treatment plants (WWTPs). The oxygen transfer efficiency (αOTE) is of great significance to the design and operation of the IFAS process. The carrier filling ratio (CFR) and aeration type are two critical factors affecting αOTE and standard oxygen transfer efficiency (αSOTE). However, the distribution and changing laws of αOTE and αSOTE in the full-scale IFAS process areunclear. To optimize the operation of a WWTP and to improve the αOTE of the aeration systems, several off-gas tests were conducted under different aeration types and different CFRs. The results show that for the aerobic tank investigated (the ratio of length and width was 8:1), the αOTE and the αSOTE of the middle of the aeration systems were higher than those of the other two sides. However, the reason for the low αOTE at the beginning and the end of the tank may be different. Coarse-bubble aeration systems had a lower αOTE and almost the same oxygenation capacity (αSOTE) as the fine-bubble aeration systems under constant CFR (43%). The average αSOTE (18.7–28.9%) of the hybrid aeration systems increased with increasing CFR (7.7–57.7%), and different locations exhibited different degrees of change. The results reveal the distribution and changing law of the αOTE of aeration systems in the IFAS process, and attention should be paid to the improvement of the OTE of the plug-flow IFAS process.

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“…Wastewater treatment process faces numerous problems due to poorly designed influent bioreactors that resulted in a significant mal-distribution of flow. Wide inequalities of distribution are often revealed through visual examination, float testing and tracer testing approaches [5]. With the improvement of computational fluid dynamics (CFD), the numerical modelling is a valuable tool used by many researchers to predict and evaluate the effect of hydrodynamic behaviour on the bioreactor performance.…”

Section: Introductionmentioning

confidence: 99%

Computational fluid dynamics-based design of anoxic bioreactor zone in wastewater treatment plant

Amin¹,

Elsakka²,

Oterkus³

et al. 2022

Desalination and Water Treatment

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Hydrodynamics-based design of an anoxic bioreactor tank is one of the serious challenges in wastewater industry. Poor fluid flow may cause settlement and therefore reduce the biological performance of a bioreactor. Whilst, a successful bioreactor design can facilitate the enhancement of biological process efficiency and reduction of energy consumption so that the investment and operation cost can be kept as low as possible. In the present study, three-dimensional computational fluid dynamics models for three common full-scale bioreactor configurations were simulated using a single-phase flow model and the standard two-equation SST k-ε turbulence model. The main objective of this numerical study is to investigate the effect of bioreactor geometry on the hydrodynamics performance of the flow field. Four submerged impellers were modelled for each tank geometry and three thrust scenarios were considered in order to evaluate the effect of changing impeller thrust on the flow velocity distribution inside each tank. The results show that the orbal bioreactor geometry has better performance in driving the flow field with more uniform flow patterns than other bioreactor configurations. The minimum flow velocity required was achieved in orbal tank to maintain the micro-organism particles suspended in the wastewater media at certain mixing power.

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Optimization of water treatment plant flow distribution with CFD modeling of an influent channel

Cited by 10 publications

References 6 publications

OpenFOAM reduced channel modeling análisis

OpenFOAM reduced channel modeling análisis

The Changing and Distribution Laws of Oxygen Transfer Efficiency in the Full-Scale IFAS Process

Computational fluid dynamics-based design of anoxic bioreactor zone in wastewater treatment plant

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