Inclusion of shear rate effects in the kinetics of a discretized population balance model: Application to struvite precipitation.

Chemical Precipitation Kinetics Magnesium Compounds Phosphates Struvite
Kinetics Mixing Population balance model Precipitation Shear rate Struvite

Journal

Water research
ISSN: 1879-2448
Titre abrégé: Water Res
Pays: England
ID NLM: 0105072

Informations de publication

Date de publication:
15 Jul 2021
Historique:
received: 10 12 2020
revised: 02 05 2021
accepted: 08 05 2021
pubmed: 31 5 2021
medline: 25 6 2021
entrez: 30 5 2021
Statut: ppublish

Résumé

The effect of mixing in the modelling of processes based on mass transfer phenomena is commonly ignored in wastewater treatment industry. In this contribution, the effect of the average shear rate in the nucleation and growth rates of struvite is analyzed by combining experimental data with simulation results obtained with a previously presented mass-based discretized population balance model. According to the obtained results, the effect of the average shear rate is identifiable for the selected data and mechanisms. Therefore, it should be considered when a detailed modelling of the process is needed. Consequently, in this contribution, the average shear rate has been decoupled from the kinetic constants. In addition, kinetic rates where it is explicitly included as a power law function have been proposed. The exponents in these power law functions for the primary homogeneous nucleation and growth are 1.3 and 0.3, respectively. Considering shear rate effects allowed to see in the simulation outputs experimentally observed effects: a faster pH decay and smaller particle distribution for increasing mixing intensities.

Identifiants

DOI: 10.1016/j.watres.2021.117242 PMID: 34052476
pubmed: 34052476
pii: S0043-1354(21)00440-1
doi: 10.1016/j.watres.2021.117242
pii:
doi:

Substances chimiques

Magnesium Compounds 0
Phosphates 0
Struvite AW3EJL1462

Types de publication

Journal Article

Langues

eng

Sous-ensembles de citation

IM

Pagination

117242

Informations de copyright

Copyright © 2021. Published by Elsevier Ltd.

Auteurs

B Elduayen-Echave (B)

CEIT-Basque Research and Technology Alliance (BRTA), Manuel Lardizabal 15, Donostia, San Sebastián 20018, Spain. Electronic address: belduayen@ceit.es.

I Lizarralde (I)

Universidad de Navarra, Tecnun Escuela de Ingenieros, Manuel Lardizabal 13, Donostia, San Sebastián 20018, Spain. Electronic address: ilizarralde@tecnun.es.

P A Schneider (PA)

Engineering & Energy, Murdoch University, 90 South St, Murdoch WA 6150, Australia. Electronic address: P.Schneider@murdoch.edu.au.

E Ayesa (E)

CEIT-Basque Research and Technology Alliance (BRTA), Manuel Lardizabal 15, Donostia, San Sebastián 20018, Spain. Electronic address: eayesa@ceit.es.

G S Larraona (GS)

Universidad de Navarra, Tecnun Escuela de Ingenieros, Manuel Lardizabal 13, Donostia, San Sebastián 20018, Spain. Electronic address: gsanchez@tecnun.es.

P Grau (P)

Universidad de Navarra, Tecnun Escuela de Ingenieros, Manuel Lardizabal 13, Donostia, San Sebastián 20018, Spain. Electronic address: pgrau@tecnun.es.

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Classifications MeSH

questionsmedicales.fr › Phénomènes chimiques › Précipitation chimique › Inclusion of shear rate effects in the...
questionsmedicales.fr › Phénomènes chimiques › Phénomènes biochimiques › Cinétique › Inclusion of shear rate effects in the...
questionsmedicales.fr › Produits chimiques inorganiques › Composés du magnésium › Inclusion of shear rate effects in the...
questionsmedicales.fr › Produits chimiques inorganiques › Composés du phosphore › Acides du phosphore › Acides phosphoriques › Phosphates › Inclusion of shear rate effects in the...
questionsmedicales.fr › Produits chimiques inorganiques › Composés du phosphore › Acides du phosphore › Acides phosphoriques › Phosphates › Struvite › Inclusion of shear rate effects in the...