Hydrodynamics of Uasb Reactor Treating Domestic Wastewater: A Three-Dimensional Numerical Study

This work performed a three-dimensional numerical study to describe the hydrodynamics of upflow anaerobic sludge blanket reactor treating domestic wastewater. The simulations were made in the commercial software Ansys CFX®. Different inclinations of the gas deflector were considered, to assess its i...

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Bibliographic Details
Published in:Water (Basel) 2020-01, Vol.12 (1), p.279
Main Authors: Brito, Maria G. S. L., Nunes, Flávio C. B., Magalhães, Hortência L. F., Lima, Wanderson M. P. B., Moura, Flávia L. C., Farias Neto, Severino R., Lima, Antonio G. B.
Format: Article
Language:English
Subjects:
Anaerobic treatment
Biogas
Computational fluid dynamics
Computer simulation
Computer-generated environments
Design
Domestic wastewater
Fluid dynamics
Fluid flow
Fluid mechanics
Gases
Hydrodynamics
Hydrofoil boats
Measurement
Organic matter
Reactors
Sludge
Upflow anaerobic sludge blanket reactors
Velocity distribution
Wastewater treatment
Water treatment
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Summary:This work performed a three-dimensional numerical study to describe the hydrodynamics of upflow anaerobic sludge blanket reactor treating domestic wastewater. The simulations were made in the commercial software Ansys CFX®. Different inclinations of the gas deflector were considered, to assess its influence on the velocity field inside the reactor. In order to validate the numerical study, we used experimental data regarding the inflow, the inlet and outlet concentrations of the organic matter, the concentration of solids at the liquid-gas interface and at the reactor outlet, and the pressure field inside it. The comparison between the numerical and experimental results demonstrated small differences. The mathematical model used to describe the hydrodynamics flow in the UASB reactor was quite satisfactory since it adequately has reproduced the physical behavior inside the reactor.
ISSN:2073-4441
2073-4441
DOI:10.3390/w12010279