Journal article
Effect of the shear rate and supersaturation on the nucleation and growth of struvite in batch stirred tank reactors
Journal of Water Process Engineering, Vol.38, Art. 101657
2020
Abstract
Controlled struvite precipitation is a promising solution for phosphorus recovery in wastewater treatment plants. Particle size distribution of recovered struvite affects its efficacy as a fertilizer, so should be considered in the design and operation of struvite recovery reactors. This contribution analyzes the effect of varying the average shear rate (between 150 s−1 and 876 s−1) and saturation index (between 0.76 and 2.96) in two different experimental set-ups. Solution pH and particle number and size measurements using an electric zone sensing method are used to monitor the process. In addition, photomicrographs are used to observe the shape of the precipitated particles. Interestingly, for identical thermochemical conditions, a higher mixing intensity, associated with the shear rate, leads to shorter induction times, faster precipitation and a greater particle density. On the other hand, for similar mixing conditions, a higher saturation index is also linked with shorter induction times, faster precipitation and a greater particle density. From the experimental data it is concluded that the effect of the fluid shear rate cannot be ignored and should be further studied in the precipitation process.
Details
- Title
- Effect of the shear rate and supersaturation on the nucleation and growth of struvite in batch stirred tank reactors
- Authors/Creators
- B. Elduayen-Echave (Author/Creator) - Centro de Estudios e Investigaciones Técnicas de GipuzkoaM. Azcona (Author/Creator) - Centro de Estudios e Investigaciones Técnicas de GipuzkoaP. Grau (Author/Creator) - Centro de Estudios e Investigaciones Técnicas de GipuzkoaP.A. Schneider (Author/Creator) - Murdoch University
- Publication Details
- Journal of Water Process Engineering, Vol.38, Art. 101657
- Publisher
- Elsevier
- Identifiers
- 991005542294907891
- Copyright
- © 2020 Elsevier Ltd.
- Murdoch Affiliation
- School of Engineering and Energy
- Language
- English
- Resource Type
- Journal article
UN Sustainable Development Goals (SDGs)
This output has contributed to the advancement of the following goals:
Metrics
56 Record Views
InCites Highlights
These are selected metrics from InCites Benchmarking & Analytics tool, related to this output
- 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, Chemical
- Engineering, Environmental
- Water Resources
- ESI research areas
- Engineering