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Computational fluid dynamics simulation as a tool for optimizing the hydrodynamic performance of membrane bioreactors

The hydrodynamic properties and shear stresses experienced by a membrane bioreactor (MBR) are directly related to its rate of membrane fouling. In this study, computational fluid dynamic models have been combined with cold model PIV experimental studies to optimize the performance properties of MBRs...

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Detalles Bibliográficos
Autores principales: Jin, Yan, Liu, Cheng-Lin, Song, Xing-Fu, Yu, Jian-Guo
Formato: Online Artículo Texto
Lenguaje:English
Publicado: The Royal Society of Chemistry 2019
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9072933/
https://www.ncbi.nlm.nih.gov/pubmed/35530793
http://dx.doi.org/10.1039/c9ra06706j
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author Jin, Yan
Liu, Cheng-Lin
Song, Xing-Fu
Yu, Jian-Guo
author_facet Jin, Yan
Liu, Cheng-Lin
Song, Xing-Fu
Yu, Jian-Guo
author_sort Jin, Yan
collection PubMed
description The hydrodynamic properties and shear stresses experienced by a membrane bioreactor (MBR) are directly related to its rate of membrane fouling. In this study, computational fluid dynamic models have been combined with cold model PIV experimental studies to optimize the performance properties of MBRs. The effects of membrane module height, number of aeration tubes and membrane spacing on liquid phase flow rates, gas holdup and shear stresses at the membrane surface have been investigated. It has been found that optimal MBRs experience the greatest shear forces on their surfaces at a distance of 250 mm from the aeration tube, around the 7 aeration tubes used to introduce gas and at the 40 mm spacings between the membrane sheets. Use of an aeration intensity of between 0.02 and 0.47 m(3) min(−1) generated shear stresses that were 50–85% higher than the original MBR for the same aeration intensity, thus affording optimal membrane performance that minimizes membrane fouling.
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spelling pubmed-90729332022-05-06 Computational fluid dynamics simulation as a tool for optimizing the hydrodynamic performance of membrane bioreactors Jin, Yan Liu, Cheng-Lin Song, Xing-Fu Yu, Jian-Guo RSC Adv Chemistry The hydrodynamic properties and shear stresses experienced by a membrane bioreactor (MBR) are directly related to its rate of membrane fouling. In this study, computational fluid dynamic models have been combined with cold model PIV experimental studies to optimize the performance properties of MBRs. The effects of membrane module height, number of aeration tubes and membrane spacing on liquid phase flow rates, gas holdup and shear stresses at the membrane surface have been investigated. It has been found that optimal MBRs experience the greatest shear forces on their surfaces at a distance of 250 mm from the aeration tube, around the 7 aeration tubes used to introduce gas and at the 40 mm spacings between the membrane sheets. Use of an aeration intensity of between 0.02 and 0.47 m(3) min(−1) generated shear stresses that were 50–85% higher than the original MBR for the same aeration intensity, thus affording optimal membrane performance that minimizes membrane fouling. The Royal Society of Chemistry 2019-10-09 /pmc/articles/PMC9072933/ /pubmed/35530793 http://dx.doi.org/10.1039/c9ra06706j Text en This journal is © The Royal Society of Chemistry https://creativecommons.org/licenses/by-nc/3.0/
spellingShingle Chemistry
Jin, Yan
Liu, Cheng-Lin
Song, Xing-Fu
Yu, Jian-Guo
Computational fluid dynamics simulation as a tool for optimizing the hydrodynamic performance of membrane bioreactors
title Computational fluid dynamics simulation as a tool for optimizing the hydrodynamic performance of membrane bioreactors
title_full Computational fluid dynamics simulation as a tool for optimizing the hydrodynamic performance of membrane bioreactors
title_fullStr Computational fluid dynamics simulation as a tool for optimizing the hydrodynamic performance of membrane bioreactors
title_full_unstemmed Computational fluid dynamics simulation as a tool for optimizing the hydrodynamic performance of membrane bioreactors
title_short Computational fluid dynamics simulation as a tool for optimizing the hydrodynamic performance of membrane bioreactors
title_sort computational fluid dynamics simulation as a tool for optimizing the hydrodynamic performance of membrane bioreactors
topic Chemistry
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9072933/
https://www.ncbi.nlm.nih.gov/pubmed/35530793
http://dx.doi.org/10.1039/c9ra06706j
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