Journal article
Inclusion of shear rate effects in the kinetics of a discretized population balance model: Application to struvite precipitation
Water Research, Vol.200, Art. 117242
2021
Abstract
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.
Details
- Title
- Inclusion of shear rate effects in the kinetics of a discretized population balance model: Application to struvite precipitation
- Authors/Creators
- B. Elduayen-Echave (Author/Creator)I. Lizarralde (Author/Creator)P.A. Schneider (Author/Creator)E. Ayesa (Author/Creator)G.S. Larraona (Author/Creator)P. Grau (Author/Creator)
- Publication Details
- Water Research, Vol.200, Art. 117242
- Publisher
- Elsevier BV
- Identifiers
- 991005540424607891
- Copyright
- © 2021 Elsevier Ltd.
- Murdoch Affiliation
- School of Engineering and Energy
- Language
- English
- Resource Type
- Journal article
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- Collaboration types
- Domestic collaboration
- International collaboration
- Citation topics
- 3 Agriculture, Environment & Ecology
- 3.83 Bioengineering
- 3.83.2268 Struvite
- Web Of Science research areas
- Engineering, Environmental
- Environmental Sciences
- Water Resources
- ESI research areas
- Environment/Ecology